US1471526A - Rotary orill bit - Google Patents
Rotary orill bit Download PDFInfo
- Publication number
- US1471526A US1471526A US397215A US39721520A US1471526A US 1471526 A US1471526 A US 1471526A US 397215 A US397215 A US 397215A US 39721520 A US39721520 A US 39721520A US 1471526 A US1471526 A US 1471526A
- Authority
- US
- United States
- Prior art keywords
- bit
- cutting
- cavities
- rotary
- rotary drill
- 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 - Lifetime
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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
- E21B10/00—Drill bits
Definitions
- My invention relates to improvements in rotary drill bits for the purpose of'drilling holes in the earth, such as oil wells and the like, by the rotary method of drilling.
- The,principal object of the invention is to provide a more eflicient and economically constructed bit for drilling holes through a varied formation.
- Another object of the invention is the provision of a bit that is less inclined to deviate from a strai ht course.
- Another 0 ject of the invention is to provide a bit with a recessed cutting center, to
- Another object of the invention is to provide a bit with a cutting means distributed .so as to maintain a constant and even keenness as the bit wears away.
- Fig. 1 is a front sectional elevation of the bit, taken through the center and .on the line 11, Figs. 2, 3 and 4.
- Fig. 2 is a side sectional elevation of the bit, taken' through the center, and on the line 2-2
- Figs. 1, 3 and Fig. 3 is a bottom sectional view of the bit taken on the line 33, Figs. 1 and 2.
- Fig. 4 is a bottom view of the bit.
- the cutting portion of the bit is indicated by the numeral 10,. .and attached to the upper portion of this framework is the shank 11, upon which is the taper threaded pin 12, Figs. 1 and v
- the cutting portion 10 of the bit consists of a tapering framework, formed into a plu-,
- the framewor bit is made in this manner for the reason that thereis more materialto' be, cut on the outercircumference than towards the center, and'consequentl the bit wears away faster on the outsi e
- This also has a tendency to keep .the hole straight, as the high central portion of the hole acts as a guide, and further this central portion is more easily cut away when it comes in contact with the central cutting portion 15 of the bit.
- the cavities are formed so as to divide the framework of the bit edges, and in such a manner as to prevent a cavities being on the same level. In the than in the center.'
- portion of the bit consists of into a series of cutting I present instance this is accomplished by ar- 1 ranging the cavities in inclined rows, sub stantiallyat right angles with the direction of the bore hole and across the line of travel, with other cavities 16 Fig. 4, parallel to the axis of the bit. these latter being for the purpose offurther reducing the material of the walls of the cavities.
- This form has the additional advantage-of giving an even distribution of the metal of the framework, and presents little difiiculty in manufacturing.
- bit In operating, the bit is turned to the rig t, the lowest ting face rst begins to cut, and as this is gradually worn awa the whole face comes oint 20, Figs. 1 and 2 of the cut-' one is worn in proportion, the wall of each cavity forming a cutting edge successively, until the bit is worn out. bit also cuts away the hole as the drilling progresses. l
- a rotary drill bit having a plurality of separate wings, said wings consisting of a framework formed with inwardly extending cavities therein.
- a rota drill bit having a plurality of downwar y projecting wings, said wings consisting of a framework formed with inwardly extending cavities therein.
- a rotary drill bit having a plurality of flatsided, downwardly projecting wings, said wings consisting of a framework formed with inwardly extending cavities therein.
- a rotary drill bit having a plurality of flatsided, downwardly projecting cuttin portions, joined by an intermediate recess cutting portion, all of said portions conframework formed by a series of cavities.
- a rotary drill bit having a plurality of outwardly and downwardly projecting cutting means joined .by an intermediate recessed cutting means, said means consisting of the walls of cavities formed therein.
- a rotary drill bit having a plurality of outwardly and downwardly projecting cutting means, joined by an intermediate recessed cutting means, said means consisting of a framework containing a multiplicity of cutting edges, said edges being formed by cavities in said frame.
- a rotary drill bit consisting of a cutcutting edges formed downwardly from a central cutting portion, and having )a threaded pin connection.
- a rotary drill bit having downwardly projectingtapered cutting wings, said wings consisting of a cutting frame containing a multiplicity of cutting edges formed by cavities.
- a rotary drill bit having a cutting frame with flat sides, said cutting frame having a multiplicity of parallel cutting edges throughout the cutting portion of the frame, said edges being formed by cavities, and said cavities being filled with abrasive cutting materia 11.
- a rotary drill bit having a plurality of flatsided, outwardly and downwardly pro jectin cutting portions joined by an in-' terme iate cutting portion, all of said portions consisting of a cutting frame work,
Description
Qct. 23,1923. R. o. PICKIN ROTARY DRILL BIT Filed July 19. 1920 ROWLAND o. mom, or LOS ans, cannon ICE.
noraar DRILL m.
, Application filed July 19, 1920. Serial No. 397,215..
To all whomz't may concern:
' Be it known that I, ROWLAND O. PICKIN, a subject of the King of Great Britain, and residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Rotary Drill Bit, ofwhich the following is a vfull and clear description, such as will enable others skilled in the art to which it; appertains to make and use the same. 1
My invention relates to improvements in rotary drill bits for the purpose of'drilling holes in the earth, such as oil wells and the like, by the rotary method of drilling.
The,principal object of the invention is to provide a more eflicient and economically constructed bit for drilling holes through a varied formation.
Another object of the invention is the provision of a bit that is less inclined to deviate from a strai ht course.
Another 0 ject of the invention is to provide a bit with a recessed cutting center, to
increase the drilling speed.
Another object of the invention is to provide a bit with a cutting means distributed .so as to maintain a constant and even keenness as the bit wears away.
- Other objects and advantages of the invention will be apparent asit is better understood from the following description,
when considered in connection with the accompanying drawings, illustrating a prep the cavities are ferred embodiment thereof.
0n the drawings:
Fig. 1 is a front sectional elevation of the bit, taken through the center and .on the line 11, Figs. 2, 3 and 4. I
Fig. 2 is a side sectional elevation of the bit, taken' through the center, and on the line 2-2, Figs. 1, 3 and Fig. 3 is a bottom sectional view of the bit taken on the line 33, Figs. 1 and 2.
Fig. 4 is a bottom view of the bit.
'Similar numerals refer tov similar parts throughout the several views.
In Figs. 1, 2, 3, and gt the cutting portion of the bit is indicated by the numeral 10,. .and attached to the upper portion of this framework is the shank 11, upon which is the taper threaded pin 12, Figs. 1 and v The cutting portion 10 of the bit consists of a tapering framework, formed into a plu-,
rality of cutting wings and in'the illustrations two wings 13 and 14 are shown. The
' the framewor bit is made in this manner for the reason that thereis more materialto' be, cut on the outercircumference than towards the center, and'consequentl the bit wears away faster on the outsi e This .also has a tendency to keep .the hole straight, as the high central portion of the hole acts as a guide, and further this central portion is more easily cut away when it comes in contact with the central cutting portion 15 of the bit.
The cutting formed by cavities 16 throughout the bit, wherever the bit comes in contact with'thehole, as it is'worn away in service.
The cavities are formed so as to divide the framework of the bit edges, and in such a manner as to prevent a cavities being on the same level. In the than in the center.'
portion of the bit consists of into a series of cutting I present instance this is accomplished by ar- 1 ranging the cavities in inclined rows, sub stantiallyat right angles with the direction of the bore hole and across the line of travel, with other cavities 16 Fig. 4, parallel to the axis of the bit. these latter being for the purpose offurther reducing the material of the walls of the cavities. This form has the additional advantage-of giving an even distribution of the metal of the framework, and presents little difiiculty in manufacturing.
As an additional cutting means some of shown to be filled with an abrasive as 17, held in position by a filler 18-, Figs. 1, 2 and 3.
In operating, the bit is turned to the rig t, the lowest ting face rst begins to cut, and as this is gradually worn awa the whole face comes oint 20, Figs. 1 and 2 of the cut-' one is worn in proportion, the wall of each cavity forming a cutting edge successively, until the bit is worn out. bit also cuts away the hole as the drilling progresses. l
It is thought that the invention and many of its attendant advantages will be sumciently understood from the foregoing description, and itwill'be apparent that variousch'a'nges may-be made in the form, con- The center of the sisting of a ting frame containing by cavities, and pro ecting outwardly and struction, and arrangement of the parts without departing from the'spirit and scope of the invention or sacrificing any of its'material advantages, the form herein described being merely a preferred. embodiment thereof.
I claim:
' 1. A rotary drill bit, having a plurality of separate wings, said wings consisting of a framework formed with inwardly extending cavities therein.
2. A rota drill bit, having a plurality of downwar y projecting wings, said wings consisting of a framework formed with inwardly extending cavities therein.
3. A rotary drill bit, having a plurality of flatsided, downwardly projecting wings, said wings consisting of a framework formed with inwardly extending cavities therein.
4. A rotary drill bit, having a plurality of flatsided, downwardly projecting cuttin portions, joined by an intermediate recess cutting portion, all of said portions conframework formed by a series of cavities. i V
5. A rotary drill bit, having a plurality of outwardly and downwardly projecting cutting means joined .by an intermediate recessed cutting means, said means consisting of the walls of cavities formed therein.
' 6. A rotary drill bit, having a plurality of outwardly and downwardly projecting cutting means, joined by an intermediate recessed cutting means, said means consisting of a framework containing a multiplicity of cutting edges, said edges being formed by cavities in said frame.
7. A rotary drill bit, consisting of a cutcutting edges formed downwardly from a central cutting portion, and having )a threaded pin connection.
8. A rotary drill bit, having downwardly projectingtapered cutting wings, said wings consisting of a cutting frame containing a multiplicity of cutting edges formed by cavities.
9. 'A rotary drill bit, having a cutting frame containing a. multiplicity of cutting edges formed by parallel inwardly extending recesses the bit. I
10. A rotary drill bit, having a cutting frame with flat sides, said cutting frame having a multiplicity of parallel cutting edges throughout the cutting portion of the frame, said edges being formed by cavities, and said cavities being filled with abrasive cutting materia 11. A rotary drill bit, having a plurality of flatsided, outwardly and downwardly pro jectin cutting portions joined by an in-' terme iate cutting portion, all of said portions consisting of a cutting frame work,
Bowman 0. rionrn.
till
throughout the cutting portion of ill
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US397215A US1471526A (en) | 1920-07-19 | 1920-07-19 | Rotary orill bit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US397215A US1471526A (en) | 1920-07-19 | 1920-07-19 | Rotary orill bit |
Publications (1)
Publication Number | Publication Date |
---|---|
US1471526A true US1471526A (en) | 1923-10-23 |
Family
ID=23570291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US397215A Expired - Lifetime US1471526A (en) | 1920-07-19 | 1920-07-19 | Rotary orill bit |
Country Status (1)
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US (1) | US1471526A (en) |
Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2751195A (en) * | 1950-04-21 | 1956-06-19 | Sandvikens Jernverks Ab | Insert for rock drills |
US2833520A (en) * | 1957-01-07 | 1958-05-06 | Robert G Owen | Annular mill for use in oil wells |
US4290498A (en) * | 1979-04-11 | 1981-09-22 | Triplett William C | Ablatible drill |
US20050133274A1 (en) * | 2002-12-30 | 2005-06-23 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
US20050257933A1 (en) * | 2004-05-20 | 2005-11-24 | Bernd-Georg Pietras | Casing running head |
US7073598B2 (en) | 2001-05-17 | 2006-07-11 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
US7083005B2 (en) | 2002-12-13 | 2006-08-01 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
US7090021B2 (en) | 1998-08-24 | 2006-08-15 | Bernd-Georg Pietras | Apparatus for connecting tublars using a top drive |
US7090023B2 (en) | 2002-10-11 | 2006-08-15 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
US7093675B2 (en) | 2000-08-01 | 2006-08-22 | Weatherford/Lamb, Inc. | Drilling method |
US7100710B2 (en) | 1994-10-14 | 2006-09-05 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7108084B2 (en) | 1994-10-14 | 2006-09-19 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7117957B2 (en) | 1998-12-22 | 2006-10-10 | Weatherford/Lamb, Inc. | Methods for drilling and lining a wellbore |
US7128154B2 (en) | 2003-01-30 | 2006-10-31 | Weatherford/Lamb, Inc. | Single-direction cementing plug |
US7128161B2 (en) | 1998-12-24 | 2006-10-31 | Weatherford/Lamb, Inc. | Apparatus and methods for facilitating the connection of tubulars using a top drive |
US7137454B2 (en) | 1998-07-22 | 2006-11-21 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
US7140445B2 (en) | 1997-09-02 | 2006-11-28 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
US7147068B2 (en) | 1994-10-14 | 2006-12-12 | Weatherford / Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7165634B2 (en) | 1994-10-14 | 2007-01-23 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7188687B2 (en) | 1998-12-22 | 2007-03-13 | Weatherford/Lamb, Inc. | Downhole filter |
US7191840B2 (en) | 2003-03-05 | 2007-03-20 | Weatherford/Lamb, Inc. | Casing running and drilling system |
US7213656B2 (en) | 1998-12-24 | 2007-05-08 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US7216727B2 (en) | 1999-12-22 | 2007-05-15 | Weatherford/Lamb, Inc. | Drilling bit for drilling while running casing |
US7219744B2 (en) | 1998-08-24 | 2007-05-22 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US7228901B2 (en) | 1994-10-14 | 2007-06-12 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7234542B2 (en) | 1994-10-14 | 2007-06-26 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7264067B2 (en) | 2003-10-03 | 2007-09-04 | Weatherford/Lamb, Inc. | Method of drilling and completing multiple wellbores inside a single caisson |
US7303022B2 (en) | 2002-10-11 | 2007-12-04 | Weatherford/Lamb, Inc. | Wired casing |
US7311148B2 (en) | 1999-02-25 | 2007-12-25 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US7325610B2 (en) | 2000-04-17 | 2008-02-05 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
US7334650B2 (en) | 2000-04-13 | 2008-02-26 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
US7360594B2 (en) | 2003-03-05 | 2008-04-22 | Weatherford/Lamb, Inc. | Drilling with casing latch |
US7370707B2 (en) | 2003-04-04 | 2008-05-13 | Weatherford/Lamb, Inc. | Method and apparatus for handling wellbore tubulars |
US7413020B2 (en) | 2003-03-05 | 2008-08-19 | Weatherford/Lamb, Inc. | Full bore lined wellbores |
US20080236830A1 (en) * | 2007-03-26 | 2008-10-02 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US7503397B2 (en) | 2004-07-30 | 2009-03-17 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
US7509722B2 (en) | 1997-09-02 | 2009-03-31 | Weatherford/Lamb, Inc. | Positioning and spinning device |
US7617866B2 (en) | 1998-08-24 | 2009-11-17 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
US20090283334A1 (en) * | 2008-05-16 | 2009-11-19 | Smith International, Inc. | Impregnated drill bit |
US20090294127A1 (en) * | 2007-03-26 | 2009-12-03 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US7650944B1 (en) | 2003-07-11 | 2010-01-26 | Weatherford/Lamb, Inc. | Vessel for well intervention |
US7712523B2 (en) | 2000-04-17 | 2010-05-11 | Weatherford/Lamb, Inc. | Top drive casing system |
US7730965B2 (en) | 2002-12-13 | 2010-06-08 | Weatherford/Lamb, Inc. | Retractable joint and cementing shoe for use in completing a wellbore |
US7857052B2 (en) | 2006-05-12 | 2010-12-28 | Weatherford/Lamb, Inc. | Stage cementing methods used in casing while drilling |
US7938201B2 (en) | 2002-12-13 | 2011-05-10 | Weatherford/Lamb, Inc. | Deep water drilling with casing |
USRE42877E1 (en) | 2003-02-07 | 2011-11-01 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US8276689B2 (en) | 2006-05-22 | 2012-10-02 | Weatherford/Lamb, Inc. | Methods and apparatus for drilling with casing |
-
1920
- 1920-07-19 US US397215A patent/US1471526A/en not_active Expired - Lifetime
Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2751195A (en) * | 1950-04-21 | 1956-06-19 | Sandvikens Jernverks Ab | Insert for rock drills |
US2833520A (en) * | 1957-01-07 | 1958-05-06 | Robert G Owen | Annular mill for use in oil wells |
US4290498A (en) * | 1979-04-11 | 1981-09-22 | Triplett William C | Ablatible drill |
US7234542B2 (en) | 1994-10-14 | 2007-06-26 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7228901B2 (en) | 1994-10-14 | 2007-06-12 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7165634B2 (en) | 1994-10-14 | 2007-01-23 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7147068B2 (en) | 1994-10-14 | 2006-12-12 | Weatherford / Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7100710B2 (en) | 1994-10-14 | 2006-09-05 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7108084B2 (en) | 1994-10-14 | 2006-09-19 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7509722B2 (en) | 1997-09-02 | 2009-03-31 | Weatherford/Lamb, Inc. | Positioning and spinning device |
US7140445B2 (en) | 1997-09-02 | 2006-11-28 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
US7137454B2 (en) | 1998-07-22 | 2006-11-21 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
US7617866B2 (en) | 1998-08-24 | 2009-11-17 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
US7219744B2 (en) | 1998-08-24 | 2007-05-22 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US7090021B2 (en) | 1998-08-24 | 2006-08-15 | Bernd-Georg Pietras | Apparatus for connecting tublars using a top drive |
US7117957B2 (en) | 1998-12-22 | 2006-10-10 | Weatherford/Lamb, Inc. | Methods for drilling and lining a wellbore |
US7188687B2 (en) | 1998-12-22 | 2007-03-13 | Weatherford/Lamb, Inc. | Downhole filter |
US7213656B2 (en) | 1998-12-24 | 2007-05-08 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US7128161B2 (en) | 1998-12-24 | 2006-10-31 | Weatherford/Lamb, Inc. | Apparatus and methods for facilitating the connection of tubulars using a top drive |
US7311148B2 (en) | 1999-02-25 | 2007-12-25 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US7216727B2 (en) | 1999-12-22 | 2007-05-15 | Weatherford/Lamb, Inc. | Drilling bit for drilling while running casing |
US7334650B2 (en) | 2000-04-13 | 2008-02-26 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
US7325610B2 (en) | 2000-04-17 | 2008-02-05 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
US7712523B2 (en) | 2000-04-17 | 2010-05-11 | Weatherford/Lamb, Inc. | Top drive casing system |
US7093675B2 (en) | 2000-08-01 | 2006-08-22 | Weatherford/Lamb, Inc. | Drilling method |
US7073598B2 (en) | 2001-05-17 | 2006-07-11 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
US7303022B2 (en) | 2002-10-11 | 2007-12-04 | Weatherford/Lamb, Inc. | Wired casing |
US7090023B2 (en) | 2002-10-11 | 2006-08-15 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
US7730965B2 (en) | 2002-12-13 | 2010-06-08 | Weatherford/Lamb, Inc. | Retractable joint and cementing shoe for use in completing a wellbore |
US7083005B2 (en) | 2002-12-13 | 2006-08-01 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
US7938201B2 (en) | 2002-12-13 | 2011-05-10 | Weatherford/Lamb, Inc. | Deep water drilling with casing |
US20050133274A1 (en) * | 2002-12-30 | 2005-06-23 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
US7131505B2 (en) * | 2002-12-30 | 2006-11-07 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
US7128154B2 (en) | 2003-01-30 | 2006-10-31 | Weatherford/Lamb, Inc. | Single-direction cementing plug |
USRE42877E1 (en) | 2003-02-07 | 2011-11-01 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US7413020B2 (en) | 2003-03-05 | 2008-08-19 | Weatherford/Lamb, Inc. | Full bore lined wellbores |
US7360594B2 (en) | 2003-03-05 | 2008-04-22 | Weatherford/Lamb, Inc. | Drilling with casing latch |
US7191840B2 (en) | 2003-03-05 | 2007-03-20 | Weatherford/Lamb, Inc. | Casing running and drilling system |
US7370707B2 (en) | 2003-04-04 | 2008-05-13 | Weatherford/Lamb, Inc. | Method and apparatus for handling wellbore tubulars |
US7650944B1 (en) | 2003-07-11 | 2010-01-26 | Weatherford/Lamb, Inc. | Vessel for well intervention |
US7264067B2 (en) | 2003-10-03 | 2007-09-04 | Weatherford/Lamb, Inc. | Method of drilling and completing multiple wellbores inside a single caisson |
US20050257933A1 (en) * | 2004-05-20 | 2005-11-24 | Bernd-Georg Pietras | Casing running head |
US7284617B2 (en) | 2004-05-20 | 2007-10-23 | Weatherford/Lamb, Inc. | Casing running head |
US7503397B2 (en) | 2004-07-30 | 2009-03-17 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
US7857052B2 (en) | 2006-05-12 | 2010-12-28 | Weatherford/Lamb, Inc. | Stage cementing methods used in casing while drilling |
US8276689B2 (en) | 2006-05-22 | 2012-10-02 | Weatherford/Lamb, Inc. | Methods and apparatus for drilling with casing |
US20090294127A1 (en) * | 2007-03-26 | 2009-12-03 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US7628205B2 (en) * | 2007-03-26 | 2009-12-08 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US8261828B2 (en) | 2007-03-26 | 2012-09-11 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US20080236830A1 (en) * | 2007-03-26 | 2008-10-02 | Baker Hughes Incorporated | Optimized machining process for cutting tubulars downhole |
US20090283334A1 (en) * | 2008-05-16 | 2009-11-19 | Smith International, Inc. | Impregnated drill bit |
US9103170B2 (en) * | 2008-05-16 | 2015-08-11 | Smith International, Inc. | Impregnated drill bit |
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