US2208087A - Electric heater - Google Patents
Electric heater Download PDFInfo
- Publication number
- US2208087A US2208087A US303148A US30314839A US2208087A US 2208087 A US2208087 A US 2208087A US 303148 A US303148 A US 303148A US 30314839 A US30314839 A US 30314839A US 2208087 A US2208087 A US 2208087A
- Authority
- US
- United States
- Prior art keywords
- tube
- electric heater
- casing
- cylinder
- contact arms
- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
Definitions
- This invention relates to electric heaters and has for an object to provide a simplified device of this character adapted to economically create circulation in an oil well to accelerate production.
- a further object is to provide a device of this character which will be so constructed that the heat element will be protected from contact with sand and thus short circuits will be eliminated.
- a further object is to provide a device of this character which may be used as a permanent heater in a pumping well without interfering with the pumping operation.
- a further object is to provide a device of this character which will be formed of a few strong simple anddurableparts, which will be inexpensive to manufacture, and which will not easily get out of order.
- Figure l is a longitudinal sectional view of an electric heater constructed in accordance with the invention and disposed in an applied position at the bottom of an oil well.
- Figure 2 is a cross sectional view taken on the line 2-2 of Figure 1.
- Figure 3 is'a cross sectional view taken on the line 33 of Figure 1.
- Ill designates a metal tube which may be connected to the bottom of a metal tube l I to be let down into the oil well below the well casing II.
- An insulating block I3 is secured to the tube H and engages the casing to center the tube ill in the casing.
- a metal cylinder l4 surrounds the lower end of the tube It and is provided with a funnel-shaped bottom l5 in.which is disposed a block l6 of insulating metal.
- the lower end of the tube I0 is provided with a flange ll which is bolted as shown at l8 to the insulating block I 6 which latter is secured by a bolt l9 to a metal diaphragm which extends across the funnel-shaped bottom of the casing.
- is screwed into the funnel-shaped bottom to elevate the cylinder to the lowest point to be heated.
- the cylinder I4 is closed at the top by a conical ly around the rods 24 in the form of a helix.
- the grounding device comprises a disk 30 which is supported on an insulating collar 3
- a plurality of metal contact arms 33 having rounded contact edges 34 are mounted in slots 35 formed in the disk 30 and are plvotally U secured to the disk by a ring 36 engaged in the groove 32 in the disk and in openings 31 in the contact arms 33;
- Helical springs 38 are connected to the contact arms below the disk, as best shown in Figure 2, and hold the upper ends of the $5 arms rocked outwardly to engage the casing l2 and maintain good electrical contact with the casing.
- the conductor 21 is insulated wire of stranded type and the strands 39 are separated and connected to respective contact arms 33.
- the tube i0 is provided with a plurality of perforations 40 below the contact arms 33 and also the tube is provided with a plurality of perforations 4
- the cylinder [4 is provided near the top with perfo- 35 rations 42.
- the tube II is connected to one terminal of a source of electricity so that the current for actuating the heater will pass from the tube l0 through the heating coil 24, con- 40 ductor 21 and contact arms 33 to the well casing l2 of the oil well.
- the coil when heated will cause a circulation of oil, as indicated by the arrowheads in Figure 1, the oil entering the tube l0 through the upper perforations 40, leaving the tube In through the lower perforations M, then rising through the cylinder H of the heater and emerging therefrom through the perforations 42.
- An electric heater for oil wells including a length of tube adapted to be inserted within the 2 menace? casing of an oil well and lowered to a point below the casing, an electric heating element surrounding the tube and insulated therefrom, a cylinder housing the heating element secured to the lower end of the tube and insulated therefrom, there being oil inlet perforations in the tube above the cylinder and oil outlet perforations in the cylinder near the upper end thereof, a conductor extending from the heating element to the exterior of the cylinder, an insulated disk surrounding the tube in the well casing, metal contact arms pivotally connected to the disk and connected to said conductor, and springs connecting the contact arms at the lower ends thereof together to hold the upper ends of the contact arms in good electrical contact with thecasing.
Description
July 16, 1940. c. J. SOMERS ELECTRIC HEATER Filed Nov. 6, 1939 a i a a W .Z m m a w w w a 9/ 0 4y v %v5/ &3 Pro B 4 7/3 7 I IN a:
II N
TF1 d j. .6 w V Patented July 16, 1940 UNITED. STATES PATENT OFFICE 2,208,087 ELECTRIC HEATER Carlton .I. Semen, Osage, Wyo. Application November 6, 1939, Serial No. 303,148
1 Claim. This invention relates to electric heaters and has for an object to provide a simplified device of this character adapted to economically create circulation in an oil well to accelerate production.
A further object is to provide a device of this character which will be so constructed that the heat element will be protected from contact with sand and thus short circuits will be eliminated.
A further object is to provide a device of this character which may be used as a permanent heater in a pumping well without interfering with the pumping operation.
A further object is to provide a device of this character which will be formed of a few strong simple anddurableparts, which will be inexpensive to manufacture, and which will not easily get out of order.
With the above and other objects in'view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.
In the accompanying drawing forming a part of this specification:
Figure l is a longitudinal sectional view of an electric heater constructed in accordance with the invention and disposed in an applied position at the bottom of an oil well.
Figure 2 is a cross sectional view taken on the line 2-2 of Figure 1.
Figure 3 is'a cross sectional view taken on the line 33 of Figure 1.
Referring now to the drawing in which like characters of reference designate similar parts in the various views, Ill designates a metal tube which may be connected to the bottom of a metal tube l I to be let down into the oil well below the well casing II. An insulating block I3 is secured to the tube H and engages the casing to center the tube ill in the casing.
A metal cylinder l4 surrounds the lower end of the tube It and is provided with a funnel-shaped bottom l5 in.which is disposed a block l6 of insulating metal. The lower end of the tube I0 is provided witha flange ll which is bolted as shown at l8 to the insulating block I 6 which latter is secured by a bolt l9 to a metal diaphragm which extends across the funnel-shaped bottom of the casing. A tube 2| is screwed into the funnel-shaped bottom to elevate the cylinder to the lowest point to be heated.
The cylinder I4 is closed at the top by a conical ly around the rods 24 in the form of a helix.
The tube i0 is provided with a plurality of perforations 40 below the contact arms 33 and also the tube is provided with a plurality of perforations 4| just above the bottom flange H. The cylinder [4 is provided near the top with perfo- 35 rations 42.
In operation the tube II is connected to one terminal of a source of electricity so that the current for actuating the heater will pass from the tube l0 through the heating coil 24, con- 40 ductor 21 and contact arms 33 to the well casing l2 of the oil well. The coil when heated will cause a circulation of oil, as indicated by the arrowheads in Figure 1, the oil entering the tube l0 through the upper perforations 40, leaving the tube In through the lower perforations M, then rising through the cylinder H of the heater and emerging therefrom through the perforations 42.
From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.
What is claimed is:
An electric heater for oil wells including a length of tube adapted to be inserted within the 2 menace? casing of an oil well and lowered to a point below the casing, an electric heating element surrounding the tube and insulated therefrom, a cylinder housing the heating element secured to the lower end of the tube and insulated therefrom, there being oil inlet perforations in the tube above the cylinder and oil outlet perforations in the cylinder near the upper end thereof, a conductor extending from the heating element to the exterior of the cylinder, an insulated disk surrounding the tube in the well casing, metal contact arms pivotally connected to the disk and connected to said conductor, and springs connecting the contact arms at the lower ends thereof together to hold the upper ends of the contact arms in good electrical contact with thecasing.
CARLTON J. SOMERS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US303148A US2208087A (en) | 1939-11-06 | 1939-11-06 | Electric heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US303148A US2208087A (en) | 1939-11-06 | 1939-11-06 | Electric heater |
Publications (1)
Publication Number | Publication Date |
---|---|
US2208087A true US2208087A (en) | 1940-07-16 |
Family
ID=23170733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US303148A Expired - Lifetime US2208087A (en) | 1939-11-06 | 1939-11-06 | Electric heater |
Country Status (1)
Country | Link |
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US (1) | US2208087A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512226A (en) * | 1948-06-01 | 1950-06-20 | Edwards John Alton | Electrical heating of oil wells |
US2615114A (en) * | 1950-03-03 | 1952-10-21 | Colby Fred | Electric oil well heater |
US2729733A (en) * | 1952-06-24 | 1956-01-03 | Heron Heating Devices Ltd | Heating device |
US5120935A (en) * | 1990-10-01 | 1992-06-09 | Nenniger John E | Method and apparatus for oil well stimulation utilizing electrically heated solvents |
US5247994A (en) * | 1990-10-01 | 1993-09-28 | Nenniger John E | Method of stimulating oil wells |
US5400430A (en) * | 1990-10-01 | 1995-03-21 | Nenniger; John E. | Method for injection well stimulation |
EP0940558A1 (en) * | 1998-03-06 | 1999-09-08 | Shell Internationale Researchmaatschappij B.V. | Electrical heater |
US20100089584A1 (en) * | 2008-10-13 | 2010-04-15 | David Booth Burns | Double insulated heaters for treating subsurface formations |
US20100258291A1 (en) * | 2009-04-10 | 2010-10-14 | Everett De St Remey Edward | Heated liners for treating subsurface hydrocarbon containing formations |
US20130043029A1 (en) * | 2002-10-24 | 2013-02-21 | Shell Oil Company | High voltage temperature limited heaters |
US8857051B2 (en) | 2010-10-08 | 2014-10-14 | Shell Oil Company | System and method for coupling lead-in conductor to insulated conductor |
US8875788B2 (en) | 2010-04-09 | 2014-11-04 | Shell Oil Company | Low temperature inductive heating of subsurface formations |
US20150021008A1 (en) * | 2013-07-18 | 2015-01-22 | Saudi Arabian Oil Company | Electromagnetic Assisted Ceramic Materials for Heavy Oil Recovery and In-Situ Steam Generation |
US8939207B2 (en) | 2010-04-09 | 2015-01-27 | Shell Oil Company | Insulated conductor heaters with semiconductor layers |
US8943686B2 (en) | 2010-10-08 | 2015-02-03 | Shell Oil Company | Compaction of electrical insulation for joining insulated conductors |
US9048653B2 (en) | 2011-04-08 | 2015-06-02 | Shell Oil Company | Systems for joining insulated conductors |
US9080409B2 (en) | 2011-10-07 | 2015-07-14 | Shell Oil Company | Integral splice for insulated conductors |
US9226341B2 (en) | 2011-10-07 | 2015-12-29 | Shell Oil Company | Forming insulated conductors using a final reduction step after heat treating |
US9755415B2 (en) | 2010-10-08 | 2017-09-05 | Shell Oil Company | End termination for three-phase insulated conductors |
-
1939
- 1939-11-06 US US303148A patent/US2208087A/en not_active Expired - Lifetime
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512226A (en) * | 1948-06-01 | 1950-06-20 | Edwards John Alton | Electrical heating of oil wells |
US2615114A (en) * | 1950-03-03 | 1952-10-21 | Colby Fred | Electric oil well heater |
US2729733A (en) * | 1952-06-24 | 1956-01-03 | Heron Heating Devices Ltd | Heating device |
US5120935A (en) * | 1990-10-01 | 1992-06-09 | Nenniger John E | Method and apparatus for oil well stimulation utilizing electrically heated solvents |
US5247994A (en) * | 1990-10-01 | 1993-09-28 | Nenniger John E | Method of stimulating oil wells |
US5400430A (en) * | 1990-10-01 | 1995-03-21 | Nenniger; John E. | Method for injection well stimulation |
EP0940558A1 (en) * | 1998-03-06 | 1999-09-08 | Shell Internationale Researchmaatschappij B.V. | Electrical heater |
US20130043029A1 (en) * | 2002-10-24 | 2013-02-21 | Shell Oil Company | High voltage temperature limited heaters |
US9022118B2 (en) | 2008-10-13 | 2015-05-05 | Shell Oil Company | Double insulated heaters for treating subsurface formations |
US20100089584A1 (en) * | 2008-10-13 | 2010-04-15 | David Booth Burns | Double insulated heaters for treating subsurface formations |
US20100258291A1 (en) * | 2009-04-10 | 2010-10-14 | Everett De St Remey Edward | Heated liners for treating subsurface hydrocarbon containing formations |
US8875788B2 (en) | 2010-04-09 | 2014-11-04 | Shell Oil Company | Low temperature inductive heating of subsurface formations |
US8939207B2 (en) | 2010-04-09 | 2015-01-27 | Shell Oil Company | Insulated conductor heaters with semiconductor layers |
US8857051B2 (en) | 2010-10-08 | 2014-10-14 | Shell Oil Company | System and method for coupling lead-in conductor to insulated conductor |
US8943686B2 (en) | 2010-10-08 | 2015-02-03 | Shell Oil Company | Compaction of electrical insulation for joining insulated conductors |
US9755415B2 (en) | 2010-10-08 | 2017-09-05 | Shell Oil Company | End termination for three-phase insulated conductors |
US9048653B2 (en) | 2011-04-08 | 2015-06-02 | Shell Oil Company | Systems for joining insulated conductors |
US9080409B2 (en) | 2011-10-07 | 2015-07-14 | Shell Oil Company | Integral splice for insulated conductors |
US9226341B2 (en) | 2011-10-07 | 2015-12-29 | Shell Oil Company | Forming insulated conductors using a final reduction step after heat treating |
US20150021008A1 (en) * | 2013-07-18 | 2015-01-22 | Saudi Arabian Oil Company | Electromagnetic Assisted Ceramic Materials for Heavy Oil Recovery and In-Situ Steam Generation |
US9644464B2 (en) * | 2013-07-18 | 2017-05-09 | Saudi Arabian Oil Company | Electromagnetic assisted ceramic materials for heavy oil recovery and in-situ steam generation |
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