CA1163189A - Pulling tool - Google Patents
Pulling toolInfo
- Publication number
- CA1163189A CA1163189A CA000384896A CA384896A CA1163189A CA 1163189 A CA1163189 A CA 1163189A CA 000384896 A CA000384896 A CA 000384896A CA 384896 A CA384896 A CA 384896A CA 1163189 A CA1163189 A CA 1163189A
- Authority
- CA
- Canada
- Prior art keywords
- section
- housing
- core means
- shoulder
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Abstract
ABSTRACT
A pulling tool for retrieving well tools from a well bore. The present invention allows the reach of the pulling tool to be easily varied. The pulling tool can also be assembled for emergency release by either upward or downward shearing forces. The weight of a well tool engaged by the pulling tool is fully supported by the housing of the pulling tool. A manual release feature is provided to release well tools from the pull-ing tool at the well surface without having to disassemble the pulling tool or shear any pins.
A pulling tool for retrieving well tools from a well bore. The present invention allows the reach of the pulling tool to be easily varied. The pulling tool can also be assembled for emergency release by either upward or downward shearing forces. The weight of a well tool engaged by the pulling tool is fully supported by the housing of the pulling tool. A manual release feature is provided to release well tools from the pull-ing tool at the well surface without having to disassemble the pulling tool or shear any pins.
Description
~ 1~31~9 The present invention relates to a pulling tool for retrieving well tools from a well bore.
Wireline equipment is frequently used to in-stall and retrieve well tools within the bore of a well flow conductor. E~uipment used to install well tools within a well flow conductor is generally referred to as a running tool. Examples of running tools are shown in U.S. Patents 3,207,222 and 3,208,531.
E~uipment used to retrieve a well tool from a well flow conductor is generally referred to as a pull-ing tool. E~amples of pulling tools are shown in U.S.
Patent 2,508,285, U.S. Patent 2,605,131, and U.S.
Patent 3,628,822. U.S. Patent 3,051,239 shows a pulling tool which can be used for both installing and retrieving well tools.
This invention discloses a pulling tool com-prising:
a. an elongate core means having a first, second, and third section;
b. a housing means releasably secured to the first section and surrounding the exter-ior of the second and third sections of the core means;
c. one end of the irst section projecting longitudinally from the housing means for engagement with a wireline tool s-tring;
d. the second section having a longitudinal '~;
~ ~318~
Wireline equipment is frequently used to in-stall and retrieve well tools within the bore of a well flow conductor. E~uipment used to install well tools within a well flow conductor is generally referred to as a running tool. Examples of running tools are shown in U.S. Patents 3,207,222 and 3,208,531.
E~uipment used to retrieve a well tool from a well flow conductor is generally referred to as a pull-ing tool. E~amples of pulling tools are shown in U.S.
Patent 2,508,285, U.S. Patent 2,605,131, and U.S.
Patent 3,628,822. U.S. Patent 3,051,239 shows a pulling tool which can be used for both installing and retrieving well tools.
This invention discloses a pulling tool com-prising:
a. an elongate core means having a first, second, and third section;
b. a housing means releasably secured to the first section and surrounding the exter-ior of the second and third sections of the core means;
c. one end of the irst section projecting longitudinally from the housing means for engagement with a wireline tool s-tring;
d. the second section having a longitudinal '~;
~ ~318~
- 2 -bore extending partially therethrough from one end and threads on the other end;
e. the other end of the first section slid-ably disposed within the bore of the second section;
f. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
g. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a WPll tool;
h. flexible latching fingers, carried by the third section and the housing means, extending longitudinally from the other end of the third section;
i. a shoulder on each finger, spaced lon -` gitudinally from the other end of the third section, projecting radially inward with respect to the opening;
j. the fingers having a first position in which the fingers are flexed inward al-lowing`the shoulders to secure a well 25~ tool within the opening and a second po-sition in which the fingers are flexed ~outward to release the shoulders from the well tool; and k. means for varying the longitudinal spac-ing between the o~her end of the third section and the shoulders by adjusting the threaded engagement between the second and third sections o the core means.
A feature of the pulling tool is that it may be run into a well flow conductor on a flexible or wire line and to reieasably bngage a well tool disposed with-~ ~31~9
e. the other end of the first section slid-ably disposed within the bore of the second section;
f. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
g. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a WPll tool;
h. flexible latching fingers, carried by the third section and the housing means, extending longitudinally from the other end of the third section;
i. a shoulder on each finger, spaced lon -` gitudinally from the other end of the third section, projecting radially inward with respect to the opening;
j. the fingers having a first position in which the fingers are flexed inward al-lowing`the shoulders to secure a well 25~ tool within the opening and a second po-sition in which the fingers are flexed ~outward to release the shoulders from the well tool; and k. means for varying the longitudinal spac-ing between the o~her end of the third section and the shoulders by adjusting the threaded engagement between the second and third sections o the core means.
A feature of the pulling tool is that it may be run into a well flow conductor on a flexible or wire line and to reieasably bngage a well tool disposed with-~ ~31~9
3 --in the flow conductor. The housing means carries khe full weight of a well tool releasably engaged with the pulling tool~ The elongate core means can be easily adjusted to engage fishing necks of various lengths.
The tool can be easily disengaged from a well tool at the well surface without having to shear any pins or to disassemble the pulling tool, and the pulling tool also can be preselected to disengage from a well tool by application of either upward or downward shearing 10 forceS.
In the drawings:
FIGURES lA, lB, and lC are schematic drawings in elevation and section showing a wireline tool string including a pulling tool, the tool string being disposed within a well flow conductor.
FIGURES 2~ and 2~ are drawings, partially in section and partially in elevation, showing the pulling tool configured to engage a long fishing neck and to be disengaged ox released by upward shearing forces.
FIGURES 3 through 7 are horizontal cross sections taken on lines 3-3, 4-4, 5-5, 6-6, and 7-7 of Figures 2A and 2B.
FIGURE 8 is a schematic drawing, partially in section and partially in elevation with portions broken away, showing the upper portion of the pulling tool suspended from a wireline tool string within a well flow conductor, and configured to be released by downward shearing forces.
FIGURE 9 is a horizontal cross section taken along lines 9-9 of Figure 8.
FIGURE 10 is a drawing, partially in section and partially in elevation, showing the lower portion of the pulling tool configured to engage a short fishing neck.-FIGURE 11 is a drawing, partiall~ in section and partially in elevation, showing the lower portion ~ ~ ~; 3 ~
Of the pulling tool configured to engage a medium length fishing neck.
FIGURE 12 is an enlarged drawing in lonyitud-inal section showing the third section of the elon-5 gate core means.
EIGURE 13 is a drawing in elevation of the second subsection of the housing means.
FIGURE 14 is a reduced drawing, partially in section and partially in elevation, o~ the first sec-10 tion of the elongate core means.
FIGURE 15 is a drawing, partially in sectionand partially in elevation with portions broken away, showing the upper portion of the pulling tool after upward shearing forces have been applied to release ~S the pulling tool from a well tool.
FIGURE 16 is a drawing, partially in section and partially in elevation with portions broken away, showing the upper portion of the pulling tool after downward shearing forces have been applied to release the pulling tool from a well tool.
FIGURE 17 is a drawing, partially in section and partially in elevation with portions broken away, showing the lower portion of the pulling tool after emergency release from a well tool.
FIGURE 18 is a drawing, partially in section and partially in elevation with portions broken away, showing the lower portion of the pulling tool engag-ing the fishing neck of a well tool.
FIGURE 19 is a drawing, partially in section and partially in elevation with portions broken away, showing the manual release feature o the pulling tool.
FIGURE 20 is a plan view of the core nut which is part of the means for releasing or disengag-ing the pulling tool from a well tool by application of shearing forces.
In Figures lA, lB, and lC, pulling tool 29 is .
~ ~3~8~
shown as part of wireline tool string 20 suspended from flexible wireline 21 within well flow conductor or tubing string 22. Tubing string 22 may be part of a standard well completion (not shown). Wireline tool string 20 can be raised and lowered through tubing string 22 by conventional wireline techni~ues to in-stall and/or retrieve a well tool within tubing string 22 at a selected downhole location. Pulling tool 29 is preferably used for retrieving well tools.
Tool string 20 includes socket member 23 secured to wireline 21, sinker or weight bars 24, wireline or link ~ars 25, and swivel joint 26. Pull-ing tool 29 is engaged with swivel joint 26 by threads 31. As explained in U.S. Patent 3,628,822, a pul'ing tool is generally used to retrieve a well tool from a downhole location by engaging a suitable fishing neck on the well tool. An example of such a fishing neck 90 is shown in Figure 18. Wireline tool string 20 can be manipulated at the well surface (not shown) by conven-tional techniques to apply either an upward or downward shearing force to pulling tool 29. As will be e~-plained later in more detail, pulling tool 29 can be assembled to release a well tool by application of either an upward or downward shearing force.
Pulling tool 29 has two major subassemblies~
housing means 30 and elongate core means 32. Core means 32 comprises first section 32a, second section 32b and third section 32c. Housing means 30 comprises first housing subsection 30a and second housing subsection 30b.
30 Each housing subsection has a generally circular cross section. The housing subsections are concentrically engaged by threads 34. Longitudinal passagaway 33 ex- ;
tends through both housing subsections. Core means 32 is slidably disposed within longitudinal passageway 33.
Shear pin 35 releasably secures first section ~ ~3 ~
32a of core means 32 to first housing subsection 30a.
First section 32a has two shear pin holes 37 and 38 extending radially therethrough and spaced longitudinal-ly from each otherO Housing subsection 30a has shear pin holes 39 and 40 radially opposite from each other and extending through subsection 30a. Pulling tool 29 is assembled with shear pin 35 disposed in shear pin holes 39 and 40 and either shear pin hole 37 or shear pin hole 38 of core means 32. Retainer sleeve 36 is attached to the exterior of housing means 30 and covers shear pin holes 39 and 40. When pin 35 is sheared as shown in Figures 15 and 16, sleeve 36 retains parts 35b of shear pin 35 within pulling tool 29. One advantage of the present invention is containment of all shear pin parts 15 within tool 29 rather than allowing parts 35b to drop into the well bore.
One end of first section 32a extends longitudinal-ly from passageway 33. Fishing neck 41 is attached to the one end of first section 32a and is engageable by threads 31 with wireline tool string 20. Fishing neck 41 also provides first shoulder 42 on the exterior of core means 32. The longitudinal spacing between first shoulder 42 and shear pin hole 37 is selected so that shoulder 42 abuts housing means 30 when pin 35 is disposed within 25 shear pin holes 37, 39 and 40. Abutting contact between shoulder 42 and housing means 30 prevents downward shearing forces from being applied to pin 35 when disposed within shear pin hole 37.
Longitudinal passageway 33 has a first enlarged 30 inside diameter portion 43 which forms first shoulder 44 within housing means 30. The exterior of first section 32a within passageway 33 is enlarged to form second shoulder 45 on core means 32. Second shoulder 45 faces first shoulder 44 of longitudinal passageway 33. When pulling 35 tool 29 is assembled with shear pin 35 in shear pin hole 3 -~ ~ 9 37 as shown in Figure 2A, shoulders 44 and 45 are lon-gitudinally spaced from each other. When pulling tool 29 is assembled with shear pin 35 in shear pin hole 38 as shown in Figure 8, shoulders 44 and 45 abut each other.
In this later position, upward shearing forces from wireline tool string 20 are prevented from being applied to pin 35. Core means 32 can only be released from hous-ing means 30 by application of upward shearing forces when pin 35 is disposed in hole 37 as shown in Figure 2A.
Alternatively, core means 32 can only be released from housing means 30 by application of downward shearing forces when pin 35 is disposed in hole 38 as shown in Flgure 8.
One end of second section 32b has longitudinal 15 bore 50 partially therethrough. The other end of first section 32a is slidably disposed within bore 50.
Counterbore 51 extends partially through the other end of first section 32a and communicates with bore 50. Lateral port 52 extends between counterbore 51, the Pxterior of core 20 means 32 and longitudinal passageway 33. Lateral port 52 equalizes fluid pressure between the components within pulling tool 29 during longitudinal movement of first section 32a and second section 32b with respect to each other and/or housing means 30. Another lateral port 67 extends through housing means 30 to equalize fluid pres-sure between longitudinal passageway 33 and the exterior of pulling tool 29.
Longitudinal passageway 33 has a second enlarged inside diameter portion 53 which forms second shoulder 54 30 spaced longitudinally from first shoulder 44 within hous-ing means 30. Annular recess 55 is formed in the exterior of the first section 32a spaced longitudinally between second shoulder 45 on the exterior of core means 32 and the other end of first section 32a. Radial openings 57, 35 58, 59 and 60 are formed in the exterior of second sec-tion 32b and communicate with bore 50. Referring to 1 ~3 ~ ~g Figure 14, openings 57 and 58 are shown radially opposite from each other. Openings 59 and 60 are also spaced radially opposite from each other and are spaced lon-gitudinall~ from the pair of openings 57 and 58. Opening 60 is cut away for purposes of explana-tion. A pair ~f lugs 61 are disposed in either openings 57 and 58 or openings 59 and 600 When pulling tool 29 is assembled with pin 35 in shear pin hole 37, lugs 61 are preferably inserted into openings 57 and 58 as shown in Figures 2A and 15.
10 When pulling tool 29 is assembled with pin 35 in shear pin hole 38, lugs 61 are preferably inserted into openings 59 and 60 as shown in Figures 8 and 16.
The one end of second section 32b is sized to be slidable between inside diameter 43 of housing means 30 and the exterior of first section 32a. Lugs 61 are sized to be larger than the distance between inside diameter 43 and the exterior of first section 32a adjacent thereto.
Therefore, when pulling tool 29 is assembled, lugs 61 must project either outwardly toward second enlarged inside diameter 53 or inwardly into recess 55.
The engagement of second housing subsection 30b by threads 34 with first housing subsection 30a forms third shoulder 62 within passageway 33. Outside dia-meter 63 of second section 32b is significantly reduced 25 below bore 50. This change in outside diameter forms third shoulder 64 of core means 32 facing third shoulder 62 of passageway 33. 5pring 65 is carried on the ex-terior of second section 32b between third shoulder 62 and third shoulder 64. Spring 65 comprises part of the means for urging core means 32 to move longi-tudinally in one direction after pin 35 has been sheared to release hous-ing means 30 from core means 32.
When pulling tool 29 is assembled with pin 35 in shear pin hole 37 and lugs 61 in openings 57 and 58, 35 pin 35 prevents longitudinal movement of first section 32a 3 :1 ~ 9 _ with respect to housing means 30. Spring 65 urges second section 32b in the one direction with respect to housing means 30 and first section 32a~ Inside diameter portion 43 cams or projects lugs 61 inwardly into recess S5 securing second section 32b with first section 32a to restrict longitudinal movement of core means 32 with re-spect to housing means 30 until after pin 35 has been sheared.
When pulling tool 29 is assembled with pin 35 in shear pin hole 38 and lugs 61 in openings 59 and 60 as shown in Figure 8, pin 35 again prevents longitudinal movement of first section 32a with respect to housing means 30. Spring 65 again urges second section 32b in the one direction with respect to housing means 30 and first section 32a. The longitudinal spacing between shear pin hole 38 and openings 59 and 60 is selected so that the ex-terior of first section 32a below recess 55 cams or pro-jects lugs 61 outwardly into contact with shoulder 54.
In this configuration, lugs 61 prevent longitudinal mo~e-ment of second section 32b relative to housing means 30.
Thus, first section 32a and second section 32b are se-cured to housing means 30 to restrict longitudinal move-ment of core means 32 with respect to housing means 30 until after pin 35 has been sheared.
Threads 68 are formed on the exterior of second section 32b extending from the other end of second section 32b towards shoulder 64. Third section 32c has a longitudinal bore 69 extending from one end partially therethrough. Threads 70 are formed on the interior of bore 69 near the one end. Outside diameter 63 of second section 32b and the inside diameter of bore 69 are sized to allow engagement of threads 68 and 70.
This engagement between threads 68 and threads 70 comprises part of the means for adjusting the "reach" of pulling tool 29. "Reach" will be defined later.
g Three pairs of slots 71, 72 and 73 are cut through the exterior of third section 32c and communi-cate with bore 69. Slot 74 with dimensions compatible with slots 71, 72 and 73 is cut through second section 32b near the other end thereof. Key 75 is sized to be positioned in slot 74 and one pair of either slots 71, 72 or 73. Pulling tool 29 has three different "reaches"
determined by the pair of slots 71, 72, or 73 in which key 7S is inserted. Pulling tool 29 can have multiple 10 reaches by varying the number and location of slots cut through the exteriox of third section 32c. Threaded hole 130 is provided in end 76 for attachment of an equaliz-ing prong (not shown) if required by the downhole condi-tion.
Second housing subsection 30b extends longitud-inally from the other end 76 of third section 32c.
Chamber or opening 77 is provided within second housing subsection 30b to receive a well tool such as fishing neck 90 therein. Chamber 77 is partially defined by the 20 portion of longitudinal passageway 33 between end 76 of core means 32 and the other end of housing means 30 opposite fishing neck 41. The volume of chamber 77 can be varied by adjusting the thread engagement between second section 32b and third seCtiGn 32c. Threaded hole 25 130 is provided in end 76 for attachment of an equalizing prong (not shown) if required by the downhole condition.
Second housing subsection 30b is a generally cylindrical sleeve with a reduced outside diameter por-tion 100 at one end carrying threads 34. Matching threads 30 34 are formed on the interior of first housing subsection 30a spaced longitudinally between shoulder 54 and the other end of first housing subsection 30a. Inside dia-meter 101 between threads 34 and the other end of sub-section 30a is significantly larger than outside dia~
35 meter portion 100 of subsection 30b. This difference in diameters forms annulus 102 when housing subsections 30a i ~31~
and 30b are engaged by threads 34.
Reduced outside diameter portion 100 has a pair of keyways 79 formed therèthrough. Kay 75 is sized to be longer than the outside diameter of third section 32c so that when pulling tool 29 is assembled, a portion of key 75 extends into each keyway 79. Key 75 and key-ways 79 cooperate to prevent rotation of core means 32 with respect to housing means 30. The length of keyway 75 is selected so as not to restrict the longitudinal movement of core means 32 with respect to housing means 30.
~ s best shown in Figure 19, cylindrical ring 81 is disposed around reduced outside diameter portion 100.
Flexible latching fingers 80 project longitudinally from ring 81. Each latching finger 80 has a square shoulder 87 which projects radially inward with respect to open-ing or chamber 77. Shoulder 87 is longitudinally spaced from end J6 of core means 32. This distance determines the maximum length of a fishing neck which can be en-gaged by pulling tool 29. This distance is commonlyreferred to as the "reach". One significant advantage of the present invention is that the reach of pulling tool 29 can be varied by adjusting the threaded engagement between second section 32b and third section 32c and in-serting key 75 into either slots 71, 72 or 73. Slots73 correspond to the longest reach for tool 29. Slots 71 correspond to the shortest reach, and slots 72 corres-pond to a medium reach.
Second housing subsection 30b has a plurality 30 of longitudinal windows 83 machined in its exterior.
Each finger 80 is fitted into a corresponding window 83.
As best shown in Figures 7, 11 and 13, upper portion 94 and lower portion 95 of each window 83 is completely re-moved to allow access to chamber 77. Middle portion 93 35 of window 83 is only partially removed to provide lateral support for fingers 80 and to retain -the structural ~ 1 ~3 1 ~
strength of second housing subsection 30b. Middle portion 93 also engages fingers 80 to expand them radial-ly outward when shifted to their second position. A
plurality of longitudinal slots 84 is machined through the exterior of subsection 30b between each window 83.
Slots 84 allow ~luids to easily escape as a fishing neck enters chamber 77.
The end of each lower portion 95 of window 83 has an inwardly tapered ramp 97 and a recess 91 to re-ceive the end of its respective finger 80 carryingshoulder 87. Each finger 80 has a first position in which it is flexed inward allowing its respective shoulder 87 to secure a fishing neck within chamber 77. Fingers 80 function as a collet in which the first position is the normal, at rest condition for the collet. The first position of fingers 80 is illustrated in Figure 2B.
Each finger 80 also has a second position in which it is flexed outward to release a fishing neck from chamber 77.
The second position of fingers 80 is illustrated in Fig-20 ures 17 and 18. If no other forces are present, fingers80 will automatically return to their first position.
Spring 82 is disposed within annulus 102 abutt-ing ring 81 and biasing fingers 80 to their first position with shoulder 87 projected into opening 77. Spring 82 is 25 selected to overcome any friction force and to move fingers 80 from their second position to their first position. Ramp 97 cooperates with spring 82 to guide fin-gers 80 inwardly into their respective recess 91.
Figure 18 shows fishing neck 90 o~ a well tool (not shown) entering chamber 77. This represents an in-termediate position while pulling tool 29 is being en-gaged with fishing neck 90. During the engagement process, fishing neck 90 forces fingers 80 upward and radially out-ward to their second position as fishing neck 90 enters 35 chamber 77. Spring 82 is compressed b~ the longitudinal 3 ~3~
movement of fingers 80. When ~ishing neck 90 contacts end 76 or core means 32, spring 82 can return fingers 80 to their first position so that shoulders 87 will secure fishing neck 90 within chamber 77.
As best shown in Figure 19, notch 85 is pro-vided partially through the exterior of second housing subsection 30b adjacent to ring 81. A boss 99 is pro-vided intermediate each finger 80 on ring 81. Screw driver 110 or any other suitable hand tool can be in-serted into notch 85 contacting boss 99 to move ring 81 and ingers 80 longitudinally with respect to housing 30. This longitudinal.movement compresses spring 82, expands fingers 80, and moves shoulders 87 radially out-ward releasing any well tool which may~ be secured within chamber 77. Thus, fishing neck 90 can be easily removed from pulling tool 29 at the well surface without having to disassemble pulling tool 29. When fishing neck 90 is secured within chamber 77, the full weight of the well tool attached to fishing neck 90 is transmitted directly through shoulder 87 to recess 91 and housing 30. Thus, fingers 80 are not re~uired to support the weight of the well tool being retrieved from a downhole location.
During the normal operation of pulling tool 29, core means 32 does no t move longitudinally relative to housing means 30. After pulling tool 29 has been assembled with the desired reach, only fingers 80 and ring 81 move longitudinally as well tools are secured within and released from chamber 77.
As previously noted, pin 35 can be sheared to allow longitudinal mo~7ement of core means 32 relative to housing means 30. Core nut 89 is engaged by threads to the exterior of third section 32c with a portion of core nut 89 projecting into upper portion 9ds of each window 83. Thus, longitudinal movement of core means 32 in the one direction relative to housing means 30 causes core ~3~
nut 89 to contact ring 81 and to shift fingers 80 to their second position. As best shown in Figure 6 and 20, the maximum outside diametèr of core nut 89 is larger than the inside diameter of chamber 77. There-fore, part of core nut 89 must be machined away so thatonly three portions have the maximum outside diameter.
When assembling pulling tool 29, core nut 89 ïs first inserted into chamber 77 with its maximum outside dia-meter portions pro~ecting into upper portions 94. Third section 32c is then threaded through core nut 89 and engaged with second section 32b.
Pulling tool 29 can be assembled so that either upward or downward shearing forces can be applied to re-lease core means 32 from housing means 30 during an 15 emergency condition. Pin 35 is positioned within shear pin hole 38 and lugs 61 within radial holes 59 and 60 when downward shearing forces are desired for emergency release. This configuration is shown in Figure 8. Pin 35 is positioned within shear pin hole 37 and lugs 61 20 within radial holes 57 and 58 when upward shearing forces are desired for emeraencv release. This confi(~uration is ~ho~m :in Fi~ure 2,7~. Tli;-~ selec~ic~n o~ upw,,srd or dow1lwa]-d S1II a:r~ncr forcec; ~'or emerqencv re:lease deDellds l1rJOn well conditic1ns downho]~ and th~ well tool which will be en-25 aaaed bv ~ullin.~t to~l 29.
Pul'Ling ~-ooi 29 has l"hree possible reach po-sitions depending upon whether key 75 is inserted into either slots 71, 72 or 73. Again, the selection of reach position depends upon the length of the fishing 30 neck of the well tool which will be engaged by pulling tool 29.
Pulling tool 29 may properly engage a well tool, but the well tool may be stuck within the well flow con-ductor. Under these circumstances, manual shifting of 35 fingers 80 to their second position using notch 85 is 1 ~ ~3:~8~
not possible. Therefore, an emergency release feature has been provided.
Assuming pulling tool 29 has been assembled with pin 35 in shear pin hole 37, upward ~orce is applied to fish neck 41 and first section 32a bv conventional wireline techniques until pin 35 shears as shown in Fig-ure 15. First section 32a can move longitudinally in the one direction relative to housing means 30 until shoulders 44 and 45 contact each other. Spring 65 urges second section 32b to move longitudinally in this same direction until lugs ~1 abut the upper part of recess 55. Lon-gitudinal movement of second section 32b is transmitted directly to third section 32c by their threaded engage-ment and key 75. Therefore, spring 65 moves second sec-tion 32b and third section 32c longitudinally as a singleunit. This movement results in core nut 89 contacting ring 81 and fingers 80 to shift fingers 80 to their second position. Thus, any well tool or fishing neck within chamber 77 will be released by application of upward shearing forces. The position of core means 32 and core nut 89 with respect to housing means 30 after emregency release is shown in Figure 17.
The following sequence will occur if pulling tool 29 has been assembled for emergency release by downward shearing forces. Downward force is applied to fish neck 41 and first section 32a by conventional wire-line techni~ues until pin 35 shears as shown in Figure 16. First section 32a moves longitudinally in the other direction relative to housing means 30 until shoulder 42 30 contacts housing means 3~. This movement positions re-cess 55 opposite lugs 61. The force o spring 65 in the one direction and tapered shoulder 54 cooperate to cam or project lugs 61 radially inward into recess 55.
This movement of lugs 61 releases second section 32b from 35 housing means 30. Spring 65 can then move second section 32b and third sec~ion 32c longitudinally in ~e one direc-~ 1~31 ~
tion as previously described for release by upward shearing forces. Figure 16 represents an intermediate position for core means 32 imm~diately after pin 35 has sheared.
After pin 35 has been sheared by downward force upward force is applied to fishing neck 41 to re-turn pulling tool 29 to the well surface. This upward force shi~ts core means 32 to the same position as shown in Figure 15, Third section 32c, core nut 89, and fin-gers 80 eventually move to the same position as shown in Figure 17 whether upward or downward shearing forces are used for emergency release.
The tool can be easily disengaged from a well tool at the well surface without having to shear any pins or to disassemble the pulling tool, and the pulling tool also can be preselected to disengage from a well tool by application of either upward or downward shearing 10 forceS.
In the drawings:
FIGURES lA, lB, and lC are schematic drawings in elevation and section showing a wireline tool string including a pulling tool, the tool string being disposed within a well flow conductor.
FIGURES 2~ and 2~ are drawings, partially in section and partially in elevation, showing the pulling tool configured to engage a long fishing neck and to be disengaged ox released by upward shearing forces.
FIGURES 3 through 7 are horizontal cross sections taken on lines 3-3, 4-4, 5-5, 6-6, and 7-7 of Figures 2A and 2B.
FIGURE 8 is a schematic drawing, partially in section and partially in elevation with portions broken away, showing the upper portion of the pulling tool suspended from a wireline tool string within a well flow conductor, and configured to be released by downward shearing forces.
FIGURE 9 is a horizontal cross section taken along lines 9-9 of Figure 8.
FIGURE 10 is a drawing, partially in section and partially in elevation, showing the lower portion of the pulling tool configured to engage a short fishing neck.-FIGURE 11 is a drawing, partiall~ in section and partially in elevation, showing the lower portion ~ ~ ~; 3 ~
Of the pulling tool configured to engage a medium length fishing neck.
FIGURE 12 is an enlarged drawing in lonyitud-inal section showing the third section of the elon-5 gate core means.
EIGURE 13 is a drawing in elevation of the second subsection of the housing means.
FIGURE 14 is a reduced drawing, partially in section and partially in elevation, o~ the first sec-10 tion of the elongate core means.
FIGURE 15 is a drawing, partially in sectionand partially in elevation with portions broken away, showing the upper portion of the pulling tool after upward shearing forces have been applied to release ~S the pulling tool from a well tool.
FIGURE 16 is a drawing, partially in section and partially in elevation with portions broken away, showing the upper portion of the pulling tool after downward shearing forces have been applied to release the pulling tool from a well tool.
FIGURE 17 is a drawing, partially in section and partially in elevation with portions broken away, showing the lower portion of the pulling tool after emergency release from a well tool.
FIGURE 18 is a drawing, partially in section and partially in elevation with portions broken away, showing the lower portion of the pulling tool engag-ing the fishing neck of a well tool.
FIGURE 19 is a drawing, partially in section and partially in elevation with portions broken away, showing the manual release feature o the pulling tool.
FIGURE 20 is a plan view of the core nut which is part of the means for releasing or disengag-ing the pulling tool from a well tool by application of shearing forces.
In Figures lA, lB, and lC, pulling tool 29 is .
~ ~3~8~
shown as part of wireline tool string 20 suspended from flexible wireline 21 within well flow conductor or tubing string 22. Tubing string 22 may be part of a standard well completion (not shown). Wireline tool string 20 can be raised and lowered through tubing string 22 by conventional wireline techni~ues to in-stall and/or retrieve a well tool within tubing string 22 at a selected downhole location. Pulling tool 29 is preferably used for retrieving well tools.
Tool string 20 includes socket member 23 secured to wireline 21, sinker or weight bars 24, wireline or link ~ars 25, and swivel joint 26. Pull-ing tool 29 is engaged with swivel joint 26 by threads 31. As explained in U.S. Patent 3,628,822, a pul'ing tool is generally used to retrieve a well tool from a downhole location by engaging a suitable fishing neck on the well tool. An example of such a fishing neck 90 is shown in Figure 18. Wireline tool string 20 can be manipulated at the well surface (not shown) by conven-tional techniques to apply either an upward or downward shearing force to pulling tool 29. As will be e~-plained later in more detail, pulling tool 29 can be assembled to release a well tool by application of either an upward or downward shearing force.
Pulling tool 29 has two major subassemblies~
housing means 30 and elongate core means 32. Core means 32 comprises first section 32a, second section 32b and third section 32c. Housing means 30 comprises first housing subsection 30a and second housing subsection 30b.
30 Each housing subsection has a generally circular cross section. The housing subsections are concentrically engaged by threads 34. Longitudinal passagaway 33 ex- ;
tends through both housing subsections. Core means 32 is slidably disposed within longitudinal passageway 33.
Shear pin 35 releasably secures first section ~ ~3 ~
32a of core means 32 to first housing subsection 30a.
First section 32a has two shear pin holes 37 and 38 extending radially therethrough and spaced longitudinal-ly from each otherO Housing subsection 30a has shear pin holes 39 and 40 radially opposite from each other and extending through subsection 30a. Pulling tool 29 is assembled with shear pin 35 disposed in shear pin holes 39 and 40 and either shear pin hole 37 or shear pin hole 38 of core means 32. Retainer sleeve 36 is attached to the exterior of housing means 30 and covers shear pin holes 39 and 40. When pin 35 is sheared as shown in Figures 15 and 16, sleeve 36 retains parts 35b of shear pin 35 within pulling tool 29. One advantage of the present invention is containment of all shear pin parts 15 within tool 29 rather than allowing parts 35b to drop into the well bore.
One end of first section 32a extends longitudinal-ly from passageway 33. Fishing neck 41 is attached to the one end of first section 32a and is engageable by threads 31 with wireline tool string 20. Fishing neck 41 also provides first shoulder 42 on the exterior of core means 32. The longitudinal spacing between first shoulder 42 and shear pin hole 37 is selected so that shoulder 42 abuts housing means 30 when pin 35 is disposed within 25 shear pin holes 37, 39 and 40. Abutting contact between shoulder 42 and housing means 30 prevents downward shearing forces from being applied to pin 35 when disposed within shear pin hole 37.
Longitudinal passageway 33 has a first enlarged 30 inside diameter portion 43 which forms first shoulder 44 within housing means 30. The exterior of first section 32a within passageway 33 is enlarged to form second shoulder 45 on core means 32. Second shoulder 45 faces first shoulder 44 of longitudinal passageway 33. When pulling 35 tool 29 is assembled with shear pin 35 in shear pin hole 3 -~ ~ 9 37 as shown in Figure 2A, shoulders 44 and 45 are lon-gitudinally spaced from each other. When pulling tool 29 is assembled with shear pin 35 in shear pin hole 38 as shown in Figure 8, shoulders 44 and 45 abut each other.
In this later position, upward shearing forces from wireline tool string 20 are prevented from being applied to pin 35. Core means 32 can only be released from hous-ing means 30 by application of upward shearing forces when pin 35 is disposed in hole 37 as shown in Figure 2A.
Alternatively, core means 32 can only be released from housing means 30 by application of downward shearing forces when pin 35 is disposed in hole 38 as shown in Flgure 8.
One end of second section 32b has longitudinal 15 bore 50 partially therethrough. The other end of first section 32a is slidably disposed within bore 50.
Counterbore 51 extends partially through the other end of first section 32a and communicates with bore 50. Lateral port 52 extends between counterbore 51, the Pxterior of core 20 means 32 and longitudinal passageway 33. Lateral port 52 equalizes fluid pressure between the components within pulling tool 29 during longitudinal movement of first section 32a and second section 32b with respect to each other and/or housing means 30. Another lateral port 67 extends through housing means 30 to equalize fluid pres-sure between longitudinal passageway 33 and the exterior of pulling tool 29.
Longitudinal passageway 33 has a second enlarged inside diameter portion 53 which forms second shoulder 54 30 spaced longitudinally from first shoulder 44 within hous-ing means 30. Annular recess 55 is formed in the exterior of the first section 32a spaced longitudinally between second shoulder 45 on the exterior of core means 32 and the other end of first section 32a. Radial openings 57, 35 58, 59 and 60 are formed in the exterior of second sec-tion 32b and communicate with bore 50. Referring to 1 ~3 ~ ~g Figure 14, openings 57 and 58 are shown radially opposite from each other. Openings 59 and 60 are also spaced radially opposite from each other and are spaced lon-gitudinall~ from the pair of openings 57 and 58. Opening 60 is cut away for purposes of explana-tion. A pair ~f lugs 61 are disposed in either openings 57 and 58 or openings 59 and 600 When pulling tool 29 is assembled with pin 35 in shear pin hole 37, lugs 61 are preferably inserted into openings 57 and 58 as shown in Figures 2A and 15.
10 When pulling tool 29 is assembled with pin 35 in shear pin hole 38, lugs 61 are preferably inserted into openings 59 and 60 as shown in Figures 8 and 16.
The one end of second section 32b is sized to be slidable between inside diameter 43 of housing means 30 and the exterior of first section 32a. Lugs 61 are sized to be larger than the distance between inside diameter 43 and the exterior of first section 32a adjacent thereto.
Therefore, when pulling tool 29 is assembled, lugs 61 must project either outwardly toward second enlarged inside diameter 53 or inwardly into recess 55.
The engagement of second housing subsection 30b by threads 34 with first housing subsection 30a forms third shoulder 62 within passageway 33. Outside dia-meter 63 of second section 32b is significantly reduced 25 below bore 50. This change in outside diameter forms third shoulder 64 of core means 32 facing third shoulder 62 of passageway 33. 5pring 65 is carried on the ex-terior of second section 32b between third shoulder 62 and third shoulder 64. Spring 65 comprises part of the means for urging core means 32 to move longi-tudinally in one direction after pin 35 has been sheared to release hous-ing means 30 from core means 32.
When pulling tool 29 is assembled with pin 35 in shear pin hole 37 and lugs 61 in openings 57 and 58, 35 pin 35 prevents longitudinal movement of first section 32a 3 :1 ~ 9 _ with respect to housing means 30. Spring 65 urges second section 32b in the one direction with respect to housing means 30 and first section 32a~ Inside diameter portion 43 cams or projects lugs 61 inwardly into recess S5 securing second section 32b with first section 32a to restrict longitudinal movement of core means 32 with re-spect to housing means 30 until after pin 35 has been sheared.
When pulling tool 29 is assembled with pin 35 in shear pin hole 38 and lugs 61 in openings 59 and 60 as shown in Figure 8, pin 35 again prevents longitudinal movement of first section 32a with respect to housing means 30. Spring 65 again urges second section 32b in the one direction with respect to housing means 30 and first section 32a. The longitudinal spacing between shear pin hole 38 and openings 59 and 60 is selected so that the ex-terior of first section 32a below recess 55 cams or pro-jects lugs 61 outwardly into contact with shoulder 54.
In this configuration, lugs 61 prevent longitudinal mo~e-ment of second section 32b relative to housing means 30.
Thus, first section 32a and second section 32b are se-cured to housing means 30 to restrict longitudinal move-ment of core means 32 with respect to housing means 30 until after pin 35 has been sheared.
Threads 68 are formed on the exterior of second section 32b extending from the other end of second section 32b towards shoulder 64. Third section 32c has a longitudinal bore 69 extending from one end partially therethrough. Threads 70 are formed on the interior of bore 69 near the one end. Outside diameter 63 of second section 32b and the inside diameter of bore 69 are sized to allow engagement of threads 68 and 70.
This engagement between threads 68 and threads 70 comprises part of the means for adjusting the "reach" of pulling tool 29. "Reach" will be defined later.
g Three pairs of slots 71, 72 and 73 are cut through the exterior of third section 32c and communi-cate with bore 69. Slot 74 with dimensions compatible with slots 71, 72 and 73 is cut through second section 32b near the other end thereof. Key 75 is sized to be positioned in slot 74 and one pair of either slots 71, 72 or 73. Pulling tool 29 has three different "reaches"
determined by the pair of slots 71, 72, or 73 in which key 7S is inserted. Pulling tool 29 can have multiple 10 reaches by varying the number and location of slots cut through the exteriox of third section 32c. Threaded hole 130 is provided in end 76 for attachment of an equaliz-ing prong (not shown) if required by the downhole condi-tion.
Second housing subsection 30b extends longitud-inally from the other end 76 of third section 32c.
Chamber or opening 77 is provided within second housing subsection 30b to receive a well tool such as fishing neck 90 therein. Chamber 77 is partially defined by the 20 portion of longitudinal passageway 33 between end 76 of core means 32 and the other end of housing means 30 opposite fishing neck 41. The volume of chamber 77 can be varied by adjusting the thread engagement between second section 32b and third seCtiGn 32c. Threaded hole 25 130 is provided in end 76 for attachment of an equalizing prong (not shown) if required by the downhole condition.
Second housing subsection 30b is a generally cylindrical sleeve with a reduced outside diameter por-tion 100 at one end carrying threads 34. Matching threads 30 34 are formed on the interior of first housing subsection 30a spaced longitudinally between shoulder 54 and the other end of first housing subsection 30a. Inside dia-meter 101 between threads 34 and the other end of sub-section 30a is significantly larger than outside dia~
35 meter portion 100 of subsection 30b. This difference in diameters forms annulus 102 when housing subsections 30a i ~31~
and 30b are engaged by threads 34.
Reduced outside diameter portion 100 has a pair of keyways 79 formed therèthrough. Kay 75 is sized to be longer than the outside diameter of third section 32c so that when pulling tool 29 is assembled, a portion of key 75 extends into each keyway 79. Key 75 and key-ways 79 cooperate to prevent rotation of core means 32 with respect to housing means 30. The length of keyway 75 is selected so as not to restrict the longitudinal movement of core means 32 with respect to housing means 30.
~ s best shown in Figure 19, cylindrical ring 81 is disposed around reduced outside diameter portion 100.
Flexible latching fingers 80 project longitudinally from ring 81. Each latching finger 80 has a square shoulder 87 which projects radially inward with respect to open-ing or chamber 77. Shoulder 87 is longitudinally spaced from end J6 of core means 32. This distance determines the maximum length of a fishing neck which can be en-gaged by pulling tool 29. This distance is commonlyreferred to as the "reach". One significant advantage of the present invention is that the reach of pulling tool 29 can be varied by adjusting the threaded engagement between second section 32b and third section 32c and in-serting key 75 into either slots 71, 72 or 73. Slots73 correspond to the longest reach for tool 29. Slots 71 correspond to the shortest reach, and slots 72 corres-pond to a medium reach.
Second housing subsection 30b has a plurality 30 of longitudinal windows 83 machined in its exterior.
Each finger 80 is fitted into a corresponding window 83.
As best shown in Figures 7, 11 and 13, upper portion 94 and lower portion 95 of each window 83 is completely re-moved to allow access to chamber 77. Middle portion 93 35 of window 83 is only partially removed to provide lateral support for fingers 80 and to retain -the structural ~ 1 ~3 1 ~
strength of second housing subsection 30b. Middle portion 93 also engages fingers 80 to expand them radial-ly outward when shifted to their second position. A
plurality of longitudinal slots 84 is machined through the exterior of subsection 30b between each window 83.
Slots 84 allow ~luids to easily escape as a fishing neck enters chamber 77.
The end of each lower portion 95 of window 83 has an inwardly tapered ramp 97 and a recess 91 to re-ceive the end of its respective finger 80 carryingshoulder 87. Each finger 80 has a first position in which it is flexed inward allowing its respective shoulder 87 to secure a fishing neck within chamber 77. Fingers 80 function as a collet in which the first position is the normal, at rest condition for the collet. The first position of fingers 80 is illustrated in Figure 2B.
Each finger 80 also has a second position in which it is flexed outward to release a fishing neck from chamber 77.
The second position of fingers 80 is illustrated in Fig-20 ures 17 and 18. If no other forces are present, fingers80 will automatically return to their first position.
Spring 82 is disposed within annulus 102 abutt-ing ring 81 and biasing fingers 80 to their first position with shoulder 87 projected into opening 77. Spring 82 is 25 selected to overcome any friction force and to move fingers 80 from their second position to their first position. Ramp 97 cooperates with spring 82 to guide fin-gers 80 inwardly into their respective recess 91.
Figure 18 shows fishing neck 90 o~ a well tool (not shown) entering chamber 77. This represents an in-termediate position while pulling tool 29 is being en-gaged with fishing neck 90. During the engagement process, fishing neck 90 forces fingers 80 upward and radially out-ward to their second position as fishing neck 90 enters 35 chamber 77. Spring 82 is compressed b~ the longitudinal 3 ~3~
movement of fingers 80. When ~ishing neck 90 contacts end 76 or core means 32, spring 82 can return fingers 80 to their first position so that shoulders 87 will secure fishing neck 90 within chamber 77.
As best shown in Figure 19, notch 85 is pro-vided partially through the exterior of second housing subsection 30b adjacent to ring 81. A boss 99 is pro-vided intermediate each finger 80 on ring 81. Screw driver 110 or any other suitable hand tool can be in-serted into notch 85 contacting boss 99 to move ring 81 and ingers 80 longitudinally with respect to housing 30. This longitudinal.movement compresses spring 82, expands fingers 80, and moves shoulders 87 radially out-ward releasing any well tool which may~ be secured within chamber 77. Thus, fishing neck 90 can be easily removed from pulling tool 29 at the well surface without having to disassemble pulling tool 29. When fishing neck 90 is secured within chamber 77, the full weight of the well tool attached to fishing neck 90 is transmitted directly through shoulder 87 to recess 91 and housing 30. Thus, fingers 80 are not re~uired to support the weight of the well tool being retrieved from a downhole location.
During the normal operation of pulling tool 29, core means 32 does no t move longitudinally relative to housing means 30. After pulling tool 29 has been assembled with the desired reach, only fingers 80 and ring 81 move longitudinally as well tools are secured within and released from chamber 77.
As previously noted, pin 35 can be sheared to allow longitudinal mo~7ement of core means 32 relative to housing means 30. Core nut 89 is engaged by threads to the exterior of third section 32c with a portion of core nut 89 projecting into upper portion 9ds of each window 83. Thus, longitudinal movement of core means 32 in the one direction relative to housing means 30 causes core ~3~
nut 89 to contact ring 81 and to shift fingers 80 to their second position. As best shown in Figure 6 and 20, the maximum outside diametèr of core nut 89 is larger than the inside diameter of chamber 77. There-fore, part of core nut 89 must be machined away so thatonly three portions have the maximum outside diameter.
When assembling pulling tool 29, core nut 89 ïs first inserted into chamber 77 with its maximum outside dia-meter portions pro~ecting into upper portions 94. Third section 32c is then threaded through core nut 89 and engaged with second section 32b.
Pulling tool 29 can be assembled so that either upward or downward shearing forces can be applied to re-lease core means 32 from housing means 30 during an 15 emergency condition. Pin 35 is positioned within shear pin hole 38 and lugs 61 within radial holes 59 and 60 when downward shearing forces are desired for emergency release. This configuration is shown in Figure 8. Pin 35 is positioned within shear pin hole 37 and lugs 61 20 within radial holes 57 and 58 when upward shearing forces are desired for emeraencv release. This confi(~uration is ~ho~m :in Fi~ure 2,7~. Tli;-~ selec~ic~n o~ upw,,srd or dow1lwa]-d S1II a:r~ncr forcec; ~'or emerqencv re:lease deDellds l1rJOn well conditic1ns downho]~ and th~ well tool which will be en-25 aaaed bv ~ullin.~t to~l 29.
Pul'Ling ~-ooi 29 has l"hree possible reach po-sitions depending upon whether key 75 is inserted into either slots 71, 72 or 73. Again, the selection of reach position depends upon the length of the fishing 30 neck of the well tool which will be engaged by pulling tool 29.
Pulling tool 29 may properly engage a well tool, but the well tool may be stuck within the well flow con-ductor. Under these circumstances, manual shifting of 35 fingers 80 to their second position using notch 85 is 1 ~ ~3:~8~
not possible. Therefore, an emergency release feature has been provided.
Assuming pulling tool 29 has been assembled with pin 35 in shear pin hole 37, upward ~orce is applied to fish neck 41 and first section 32a bv conventional wireline techniques until pin 35 shears as shown in Fig-ure 15. First section 32a can move longitudinally in the one direction relative to housing means 30 until shoulders 44 and 45 contact each other. Spring 65 urges second section 32b to move longitudinally in this same direction until lugs ~1 abut the upper part of recess 55. Lon-gitudinal movement of second section 32b is transmitted directly to third section 32c by their threaded engage-ment and key 75. Therefore, spring 65 moves second sec-tion 32b and third section 32c longitudinally as a singleunit. This movement results in core nut 89 contacting ring 81 and fingers 80 to shift fingers 80 to their second position. Thus, any well tool or fishing neck within chamber 77 will be released by application of upward shearing forces. The position of core means 32 and core nut 89 with respect to housing means 30 after emregency release is shown in Figure 17.
The following sequence will occur if pulling tool 29 has been assembled for emergency release by downward shearing forces. Downward force is applied to fish neck 41 and first section 32a by conventional wire-line techni~ues until pin 35 shears as shown in Figure 16. First section 32a moves longitudinally in the other direction relative to housing means 30 until shoulder 42 30 contacts housing means 3~. This movement positions re-cess 55 opposite lugs 61. The force o spring 65 in the one direction and tapered shoulder 54 cooperate to cam or project lugs 61 radially inward into recess 55.
This movement of lugs 61 releases second section 32b from 35 housing means 30. Spring 65 can then move second section 32b and third sec~ion 32c longitudinally in ~e one direc-~ 1~31 ~
tion as previously described for release by upward shearing forces. Figure 16 represents an intermediate position for core means 32 imm~diately after pin 35 has sheared.
After pin 35 has been sheared by downward force upward force is applied to fishing neck 41 to re-turn pulling tool 29 to the well surface. This upward force shi~ts core means 32 to the same position as shown in Figure 15, Third section 32c, core nut 89, and fin-gers 80 eventually move to the same position as shown in Figure 17 whether upward or downward shearing forces are used for emergency release.
Claims (15)
1. A pulling tool comprising:
a. an elongate core means having a first, second, and third section;
b. a housing means releasably secured to the first section and surrounding the exterior of the second and third sec-tions of the core means;
c. one end of the first section projecting longitudinally from the housing means for engagement with a wireline tool string;
d. the second section having a longitudinal bore extending partially therethrough from one end and threads on the other end;
e. the other end of the first section slidably disposed within the bore of the second section;
f. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
g. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a well tool;
h. flexible latching fingers, carried by the third section and the housing means extending longitudinally from the other end of the third section;
i. a shoulder on each finger, spaced longitudinally from the other end of the third section, projecting radial-ly inward with respect to the opening;
j. the fingers having a first position in which the fingers are flexed inward al-lowing the shoulders to secure a well tool within the opening and a second position in which the fingers are flexed outward to release the shoulders from the well tool; and k. means for varying the longitudinal spacing between the other end of the third section and the shoulders by adjusting the threaded engagement be-tween the second and third sections of the core means.
a. an elongate core means having a first, second, and third section;
b. a housing means releasably secured to the first section and surrounding the exterior of the second and third sec-tions of the core means;
c. one end of the first section projecting longitudinally from the housing means for engagement with a wireline tool string;
d. the second section having a longitudinal bore extending partially therethrough from one end and threads on the other end;
e. the other end of the first section slidably disposed within the bore of the second section;
f. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
g. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a well tool;
h. flexible latching fingers, carried by the third section and the housing means extending longitudinally from the other end of the third section;
i. a shoulder on each finger, spaced longitudinally from the other end of the third section, projecting radial-ly inward with respect to the opening;
j. the fingers having a first position in which the fingers are flexed inward al-lowing the shoulders to secure a well tool within the opening and a second position in which the fingers are flexed outward to release the shoulders from the well tool; and k. means for varying the longitudinal spacing between the other end of the third section and the shoulders by adjusting the threaded engagement be-tween the second and third sections of the core means.
2. A pulling tool, as defined in claim 1, further comprising:
a. means for biasing the fingers toward their first position;
b. means for engaging the fingers by the core means to allow longitudinal move-ment of the core means in one direction with respect to the housing means to shift the fingers from their first po-sition to their second position; and c. means for releasably securing the core means to the housing means to restrict longitudinal movement of the core means with respect to the housing means until after the core means has been re-leased from the housing means.
a. means for biasing the fingers toward their first position;
b. means for engaging the fingers by the core means to allow longitudinal move-ment of the core means in one direction with respect to the housing means to shift the fingers from their first po-sition to their second position; and c. means for releasably securing the core means to the housing means to restrict longitudinal movement of the core means with respect to the housing means until after the core means has been re-leased from the housing means.
3. A pulling tool, as defined in claim 2, where-in the housing means further comprises:
a. a first housing subsection threadedly en-gaged with a second housing subsection and a longitudinal passageway extend ing through both housing subsections;
b. the housing means having a generally circular cross section; and c. the core means slidably disposed with-in the longitudinal passageway.
a. a first housing subsection threadedly en-gaged with a second housing subsection and a longitudinal passageway extend ing through both housing subsections;
b. the housing means having a generally circular cross section; and c. the core means slidably disposed with-in the longitudinal passageway.
4. A pulling tool, as defined in claim 3, fur-ther comprising:
a. the first section of the core means having first and second shear pin holes radially therethrough;
b. the shear pin holes in the core means longitudinally spaced from each other;
c. the first housing subsection having two shear pin holes radially opposite from each other and sized to receive a pin extending through one of the shear pin holes in the core means;
d. a first shoulder on the exterior of the core means abutting the housing means when a pin is positioned within the first shear pin hole and the shear pin holes of the housing means;
e. a first enlarged inside diameter por-tion of the longitudinal passageway forming a first shoulder within the housing means;
f. a second shoulder carried on the ex-terior of the first section of the core means within the housing means and facing the first shoulder of the lon-gitudinal passageway.
g. the second shoulder of the core means abutting the first shoulder of the lon-gitudinal passageway when a pin is po-sitioned within the second shear pin hole and the shear pin holes of the housing means; and h. the abutting contact of the first shoulder of the core means with the housing means preventing downward shearing forces from being applied to a pin positioned with-in the first shear pin hole and the abutt-ing contact of the second shoulder of the core means with the first shoulder of the longitudinal passageway prevent-ing upward shearing forces from being applied to a pin positioned within the second shear pin hole.
a. the first section of the core means having first and second shear pin holes radially therethrough;
b. the shear pin holes in the core means longitudinally spaced from each other;
c. the first housing subsection having two shear pin holes radially opposite from each other and sized to receive a pin extending through one of the shear pin holes in the core means;
d. a first shoulder on the exterior of the core means abutting the housing means when a pin is positioned within the first shear pin hole and the shear pin holes of the housing means;
e. a first enlarged inside diameter por-tion of the longitudinal passageway forming a first shoulder within the housing means;
f. a second shoulder carried on the ex-terior of the first section of the core means within the housing means and facing the first shoulder of the lon-gitudinal passageway.
g. the second shoulder of the core means abutting the first shoulder of the lon-gitudinal passageway when a pin is po-sitioned within the second shear pin hole and the shear pin holes of the housing means; and h. the abutting contact of the first shoulder of the core means with the housing means preventing downward shearing forces from being applied to a pin positioned with-in the first shear pin hole and the abutt-ing contact of the second shoulder of the core means with the first shoulder of the longitudinal passageway prevent-ing upward shearing forces from being applied to a pin positioned within the second shear pin hole.
5. A pulling tool, as defined in claim 4, fur-ther comprising;
a. a second enlarged inside diameter por-tion of the longitudinal passageway forming a second shoulder spaced lon-gitudinally from the first shoulder within the housing means;
b. a recess formed on the exterior of the first section of the core means and spaced longitudinally from the second shear pin hole;
c. radial holes in the exterior of the second section of the core means communi-cating between the exterior of the core means and the bore of the second section;
d. a lug disposed within each radial hole and sized to project either radially outward or inward with respect to the bore of the second section of the core means;
e. the second shoulder, recess, radial holes and lugs comprise part of the means for releasably securing the core means to the housing means; and f. means for urging the core means to move longitudinally in the one direction when the core means is released from the housing means.
a. a second enlarged inside diameter por-tion of the longitudinal passageway forming a second shoulder spaced lon-gitudinally from the first shoulder within the housing means;
b. a recess formed on the exterior of the first section of the core means and spaced longitudinally from the second shear pin hole;
c. radial holes in the exterior of the second section of the core means communi-cating between the exterior of the core means and the bore of the second section;
d. a lug disposed within each radial hole and sized to project either radially outward or inward with respect to the bore of the second section of the core means;
e. the second shoulder, recess, radial holes and lugs comprise part of the means for releasably securing the core means to the housing means; and f. means for urging the core means to move longitudinally in the one direction when the core means is released from the housing means.
6. A pulling tool, as defined in claim 5, fur-ther comprising:
a. longitudinal windows through the ex-terior of the second housing subsection and a flexible latching finger carried within each window;
b. a ring supported on the exterior of the third section of the core means between the outside diameter of the third section and the inside dia-meter of the housing means;
c. each flexible latching finger attached to and extending longitudinally from the ring;
d. a recess formed in the interior of the housing means and comprising a portion of the extreme end of each window lon-gitudinally spaced from the other end of the third section; and e. the extreme end of each finger op-posite the ring resting within the recess when the fingers are in their first po-sition to support the weight of a well tool, secured within the opening, by the housing means.
a. longitudinal windows through the ex-terior of the second housing subsection and a flexible latching finger carried within each window;
b. a ring supported on the exterior of the third section of the core means between the outside diameter of the third section and the inside dia-meter of the housing means;
c. each flexible latching finger attached to and extending longitudinally from the ring;
d. a recess formed in the interior of the housing means and comprising a portion of the extreme end of each window lon-gitudinally spaced from the other end of the third section; and e. the extreme end of each finger op-posite the ring resting within the recess when the fingers are in their first po-sition to support the weight of a well tool, secured within the opening, by the housing means.
7. A pulling tool, as defined in claim 6, where-in the urging means further comprises:
a. a third shoulder within the passageway of the housing means facing the second shoulder of the passageway;
b. a third shoulder on the exterior of the core means spaced longitudinally from the radial holes of the second section and facing the third shoulder of the passageway; and c. a spring disposed between the third shoulder of the core means and the third shoulder of the passageway.
a. a third shoulder within the passageway of the housing means facing the second shoulder of the passageway;
b. a third shoulder on the exterior of the core means spaced longitudinally from the radial holes of the second section and facing the third shoulder of the passageway; and c. a spring disposed between the third shoulder of the core means and the third shoulder of the passageway.
8. A pulling tool, as defined in claim 7, wherein the means for varying the longitudinal spacing be-tween the other end of the third section and the shoulders of the latching fingers further comprises:
a. a plurality of pairs of radial slots spaced longitudinally from each other through the exterior wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot of the core means and a selected pair, of the radial slots in the third section of the core means.
a. a plurality of pairs of radial slots spaced longitudinally from each other through the exterior wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot of the core means and a selected pair, of the radial slots in the third section of the core means.
9. A pulling tool comprising;
a. an elongate core means having a first, second, and third section;
b. the first section having a first shear pin hole and a second shear pin hole ex-tending radially therethrough and spaced longitudinally from each other;
c. a housing means releasably secured to the first section by a pin disposed with-in either a first or second shear pin hole in the first section;
d. a first shoulder formed on the exterior of the first section and spaced lon-gitudinally from the first shear pin hole in the first section to allow up-ward force to shear a pin disposed with-in the first shear pin hole;
e. a second shoulder formed on the ex-terior of the first section and spaced longitudinally from the second shear pin hole in the first section to allow downward force to shear a pin disposed within the second shear pin hole;
f. one end of the first section project-ing longitudinally from the housing means for engagement with a wireline tool string;
g. the second section having a longitudi-nal bore extending from one end partial-ly therethrough and threads on the other end;
h. the other end of the first section slidably disposed within the bore of the second section;
i. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
j. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a well tool;
k. flexible latching fingers, carried by the third section and the housing means, extending longitudinally from the other end of the third section;
l. a shoulder on each finger, spaced longitudinally from the other end of the third section, projecting radially in-ward with respect to the opening; and m. the fingers having a first position in which the fingers are flexed inwardly allowing the shoulders to secure a well tool within the opening and a second position in which the fingers are flexed outwardly releasing the well tool from the opening.
a. an elongate core means having a first, second, and third section;
b. the first section having a first shear pin hole and a second shear pin hole ex-tending radially therethrough and spaced longitudinally from each other;
c. a housing means releasably secured to the first section by a pin disposed with-in either a first or second shear pin hole in the first section;
d. a first shoulder formed on the exterior of the first section and spaced lon-gitudinally from the first shear pin hole in the first section to allow up-ward force to shear a pin disposed with-in the first shear pin hole;
e. a second shoulder formed on the ex-terior of the first section and spaced longitudinally from the second shear pin hole in the first section to allow downward force to shear a pin disposed within the second shear pin hole;
f. one end of the first section project-ing longitudinally from the housing means for engagement with a wireline tool string;
g. the second section having a longitudi-nal bore extending from one end partial-ly therethrough and threads on the other end;
h. the other end of the first section slidably disposed within the bore of the second section;
i. one end of the third section having threads thereon and engageable with the threads on the other end of the second section;
j. the housing means extending longitudinal-ly from the other end of the third sec-tion and having an opening therein to receive a well tool;
k. flexible latching fingers, carried by the third section and the housing means, extending longitudinally from the other end of the third section;
l. a shoulder on each finger, spaced longitudinally from the other end of the third section, projecting radially in-ward with respect to the opening; and m. the fingers having a first position in which the fingers are flexed inwardly allowing the shoulders to secure a well tool within the opening and a second position in which the fingers are flexed outwardly releasing the well tool from the opening.
10. A pulling tool, as defined in claim 9, further comprising means for varying the longitudinal spacing between the other end of the third section and the shoulders of the fingers including:
a. a plurality of pairs of radial slots spaced longitudinally from each other through the wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot in the second section of the core means and a selected pair of the radial slots in the third section of the core means.
a. a plurality of pairs of radial slots spaced longitudinally from each other through the wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot in the second section of the core means and a selected pair of the radial slots in the third section of the core means.
11. A pulling tool, as defined in claim 9, fur-ther comprising:
a. means for biasing the fingers toward their first position;
b. means for engaging the fingers by the core means to allow longitudinal move-ment of the core means in one direc-tion with respect to the housing means to shift the fingers from their first position to their second position; and c. means for releasably securing the first section and second section of the core means to restrict longitudinal movement of the core means with respect to the housing means until after the core means has been released from the hous-ing means.
a. means for biasing the fingers toward their first position;
b. means for engaging the fingers by the core means to allow longitudinal move-ment of the core means in one direc-tion with respect to the housing means to shift the fingers from their first position to their second position; and c. means for releasably securing the first section and second section of the core means to restrict longitudinal movement of the core means with respect to the housing means until after the core means has been released from the hous-ing means.
12. A pulling tool, as defined in claim 9, wherein the housing means further comprises:
a. a first housing subsection threadedly engaged with a second housing subsection and a longitudinal passageway extend-ing through both housing subsections;
b. the housing means having a generally circular cross section;
c. the core means slidably disposed within the longitudinal passageway; and d. the first housing subsection having two shear pin holes radially opposite from each other and sized to receive a pin extending through either the first or second shear pin hole of the core means.
a. a first housing subsection threadedly engaged with a second housing subsection and a longitudinal passageway extend-ing through both housing subsections;
b. the housing means having a generally circular cross section;
c. the core means slidably disposed within the longitudinal passageway; and d. the first housing subsection having two shear pin holes radially opposite from each other and sized to receive a pin extending through either the first or second shear pin hole of the core means.
13. A pulling tool, as defined in claim 9, further comprising:
a. longitudinal windows through the ex-terior of the second housing subsection and a flexible latching finger carried within each window;
b. a ring supported on the exterior of the third section of the core means between the outside diameter of the third section and the inside diameter of the housing means;
c. each flexible latching finger attach-ed to and extending longitudinally from the ring;
d. a recess formed in the interior of the housing means and comprising a portion of the extreme end of each window longitudinally spaced from the other end of the third section; and e. the extreme end of each finger opposite the ring resting within the recess when the fingers are in their first position to support the weight of a well tool, secured within the opening, by the housing means.
a. longitudinal windows through the ex-terior of the second housing subsection and a flexible latching finger carried within each window;
b. a ring supported on the exterior of the third section of the core means between the outside diameter of the third section and the inside diameter of the housing means;
c. each flexible latching finger attach-ed to and extending longitudinally from the ring;
d. a recess formed in the interior of the housing means and comprising a portion of the extreme end of each window longitudinally spaced from the other end of the third section; and e. the extreme end of each finger opposite the ring resting within the recess when the fingers are in their first position to support the weight of a well tool, secured within the opening, by the housing means.
14. A pulling tool, as defined in claim 13, having means for positive engagement of a well tool with-in the opening comprising:
a. the shoulder on each finger;
b. the extreme end of each finger; and c. the recess in the respective window.
a. the shoulder on each finger;
b. the extreme end of each finger; and c. the recess in the respective window.
15. A pulling tool, as defined in claim 9, wherein the means for varying the longitudinal spacing between the other end of the third section and the shoulders of the latching fingers further comprises:
a. a plurality of pairs of radial slots spaced longitudinally from each other through the exterior wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot of the core means and a selected pair of the radial slots in the third section of the core means.
a. a plurality of pairs of radial slots spaced longitudinally from each other through the exterior wall of the third section of the core means;
b. a radial slot through the other end of the second section of the core means;
and c. a key disposed within the radial slot of the core means and a selected pair of the radial slots in the third section of the core means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US233,473 | 1981-02-11 | ||
| US06/233,473 US4558895A (en) | 1981-02-11 | 1981-02-11 | Pulling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163189A true CA1163189A (en) | 1984-03-06 |
Family
ID=22877394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000384896A Expired CA1163189A (en) | 1981-02-11 | 1981-08-31 | Pulling tool |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4558895A (en) |
| EP (2) | EP0070831A1 (en) |
| CA (1) | CA1163189A (en) |
| GB (1) | GB2106563B (en) |
| MX (1) | MX155067A (en) |
| NO (1) | NO820003L (en) |
| WO (1) | WO1982002736A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3513123C1 (en) * | 1985-04-12 | 1986-08-14 | Norton Christensen, Inc., Salt Lake City, Utah | Mechanical guillotine |
| US5373900A (en) | 1988-04-15 | 1994-12-20 | Baker Hughes Incorporated | Downhole milling tool |
| US4767145A (en) * | 1986-10-06 | 1988-08-30 | Otis Engineering Corporation | Running and pulling tool |
| US4838594A (en) * | 1986-10-06 | 1989-06-13 | Otis Engineering Corporation | Running and pulling tool |
| GB2200674A (en) * | 1987-01-29 | 1988-08-10 | Terence Robert Morrell | Universal wireline running and pulling tool |
| GB2224764B (en) * | 1988-11-14 | 1993-03-10 | Otis Eng Co | Hydraulic up-down well jar and method of operating same |
| US5040598A (en) * | 1989-05-01 | 1991-08-20 | Otis Engineering Corporation | Pulling tool for use with reeled tubing and method for operating tools from wellbores |
| US4986362A (en) * | 1989-12-08 | 1991-01-22 | Pleasants Charles W | Running tool for use with reeled tubing and method of operating same |
| US5000265A (en) * | 1990-01-23 | 1991-03-19 | Otis Engineering Corporation | Packing assembly for use with reeled tubing and method of operating and removing same |
| US5012871A (en) * | 1990-04-12 | 1991-05-07 | Otis Engineering Corporation | Fluid flow control system, assembly and method for oil and gas wells |
| US5197773A (en) * | 1991-10-15 | 1993-03-30 | Otis Engineering Corporation | Running and pulling tool |
| US5470118A (en) * | 1992-12-02 | 1995-11-28 | Burton; James E. | Shear device for well service tools |
| US5398754A (en) * | 1994-01-25 | 1995-03-21 | Baker Hughes Incorporated | Retrievable whipstock anchor assembly |
| US5605366A (en) * | 1994-11-23 | 1997-02-25 | Weatherford/Lamb, Inc. | External pulling tool and method of operation |
| US5639135A (en) * | 1994-11-23 | 1997-06-17 | Enterra Oil Field Rental | Fishing tool and method of operation |
| GB2318134B (en) * | 1996-10-08 | 2000-12-13 | Baker Hughes Inc | Running and setting tool for packers |
| US5865253A (en) * | 1997-04-09 | 1999-02-02 | Weatherford/Lamb, Inc. | Wellbore overshot |
| US6152219A (en) * | 1999-01-29 | 2000-11-28 | Halliburton Energy Services, Inc. | Downhole pulling tool |
| CA2425091C (en) * | 2003-04-11 | 2009-01-20 | Karel Bostik | Shear coupling for oil well pump strings |
| US20160024865A1 (en) * | 2014-07-24 | 2016-01-28 | Superior Drilling Products, Inc. | Devices and systems for extracting drilling equipment through a drillstring |
| US11236569B2 (en) | 2015-08-07 | 2022-02-01 | Halliburton Energy Services, Inc. | Well apparatus with latch assembly and methods thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2508285A (en) * | 1945-04-28 | 1950-05-16 | Herbert C Otis | Well tool |
| US2605131A (en) * | 1948-02-27 | 1952-07-29 | Otis Eng Co | Retrieving tool |
| US3051239A (en) * | 1958-04-21 | 1962-08-28 | Otis Eng Co | Running and pulling tool |
| US3207222A (en) * | 1962-01-30 | 1965-09-21 | Otis Eng Co | Locking device and running tool therefor |
| US3208531A (en) * | 1962-08-21 | 1965-09-28 | Otis Eng Co | Inserting tool for locating and anchoring a device in tubing |
| US3628822A (en) * | 1969-09-15 | 1971-12-21 | Otis Eng Co | Well tools |
| US3950021A (en) * | 1974-07-29 | 1976-04-13 | Schlumberger Technology Corporation | Pulling and running tool |
| US4185865A (en) * | 1975-06-04 | 1980-01-29 | Taylor William T | Releasable wireline overshot |
| US4127297A (en) * | 1976-12-06 | 1978-11-28 | Alex Dufrene | Releasable overshot |
-
1981
- 1981-02-11 US US06/233,473 patent/US4558895A/en not_active Expired - Lifetime
- 1981-08-31 CA CA000384896A patent/CA1163189A/en not_active Expired
- 1981-09-21 EP EP81902771A patent/EP0070831A1/en not_active Ceased
- 1981-09-21 WO PCT/US1981/001268 patent/WO1982002736A1/en not_active Application Discontinuation
- 1981-09-21 EP EP85201970A patent/EP0187408A1/en not_active Withdrawn
- 1981-09-21 GB GB08135489A patent/GB2106563B/en not_active Expired
- 1981-11-18 MX MX190188A patent/MX155067A/en unknown
-
1982
- 1982-01-04 NO NO820003A patent/NO820003L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1982002736A1 (en) | 1982-08-19 |
| GB2106563A (en) | 1983-04-13 |
| MX155067A (en) | 1988-01-22 |
| EP0070831A1 (en) | 1983-02-09 |
| US4558895A (en) | 1985-12-17 |
| NO820003L (en) | 1982-08-19 |
| EP0187408A1 (en) | 1986-07-16 |
| EP0070831A4 (en) | 1985-10-14 |
| GB2106563B (en) | 1985-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |