US2792063A - Device for anchoring tubing - Google Patents
Device for anchoring tubing Download PDFInfo
- Publication number
- US2792063A US2792063A US345400A US34540053A US2792063A US 2792063 A US2792063 A US 2792063A US 345400 A US345400 A US 345400A US 34540053 A US34540053 A US 34540053A US 2792063 A US2792063 A US 2792063A
- Authority
- US
- United States
- Prior art keywords
- tubing
- housing
- recesses
- extending
- pistons
- 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
Links
- 238000004873 anchoring Methods 0.000 title description 7
- 239000012530 fluid Substances 0.000 description 3
- ZEFNOZRLAWVAQF-UHFFFAOYSA-N Dinitolmide Chemical compound CC1=C(C(N)=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O ZEFNOZRLAWVAQF-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/0411—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion specially adapted for anchoring tools or the like to the borehole wall or to well tube
- E21B23/04115—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion specially adapted for anchoring tools or the like to the borehole wall or to well tube using radial pistons
Definitions
- the principal object of the present device is to provide a device which can be quickly and easily interconnected in lengths of tubing and will automatically grip a surrounding casing for holding said tubing in position during the introduction of pressurized media into said tubing, yet will release the casing when the pressure in the casing is equal to orexceeds the pressure in said tubing.
- a further and equally important object of the invention is to provide a tubing anchor which is positive acting under adverse conditions, will not permit the loss of pressure within the'connected tubing, and through its simplicity of construction can be economically produced and maintained.
- Fig. 1 is a side elevation of the present tube anchor.
- Fig. 2 is a vertical cross-sectional view of the tube anchor taken on line 2-2 of Figs. 1 and 3, but illustrating the various positions of the pistons.
- Fig. 3 is a horizontal cross-sectional view of the tube anchor casing taken on line 33 of Fig. 2.
- Fig. 4 is a view of the top outer face of one of the pistons forming a part of the present device.
- Fig. 5 is a side elevation of said piston
- Fig. 6 is a cross sectional View of said piston taken on line 66 of Fig. 4.
- numeral 1 refers to the anchor tubing housing, which in the present form as illustrated in the drawings, is of a cylindrical configuration and has a reduced portion 2 extending from the top end of said housing with a further reduced portion 3 having a threaded peripheral portion 4.
- the opposite end of said housing has a reduced portion 5 extending from the lower end thereof.
- the bore 6 of said portion 5 is threaded as at 7 and thereafter tapers inwardly as at 8 forming a stop.
- a bore 9 extends from stop 8 through housing 1 and its connected portions 2, 3 and 4.
- housing 1 has a series of longitudinally extending grooves 10 formed in the periphery thereof for providing a channelway for the passage of fluid past said housing.
- Housing 1 further has, in the example shown in the present drawing, three series of cylindrical recesses 11 provided in the periphery of said housing with each series extending longitudinally thereof and with the recesses 11 extending radially from the longitudinal axis of bore 9 and open at the periphery of said housing. Recesses 1%) are positioned between each series of said recesses 111.
- a plurality of bars 15 each are positioned in one of said slots 14 whereby the bar extends longitudinally of housing 1 and across the centers of recesses 11 of one series. Bars 15 having a series of openings therethrough with housing 1 having corresponding threaded recesses whereby screws 16 are employed for fastening bars 15 throughout their length to housing 1.
- Apluralityof piston slips 17, each having a rounded serrated top surface 18 with a diametrical slot 19, are each positioned in one of said recesses 11. Said pistons 17 are of an annular configuration and sized for sliding fit within its respective recess 11.
- a pair of guide recesses 20 are also formed in each piston 17 with a guide recess opening into slot 19.
- the periphery of each piston also has a plurality of annular recesses 21 extending therearound in which are positioned rings or p'ackings 22.
- the bottom face 23 of each piston 17 is flat for coinciding with shoulders 13 of the respective recess and extending across the respective port 12.
- Each piston is arranged inits recess with one of said bars '15 extending partially within slot 19.
- a pair of coil springs '24 are each mounted within one of said guide recesses 20 of each pistonand extends through slot 19 across the bar 15 positioned outwardly thereof for normally moving the piston 17 inwardly, until bottom 23 contacts the adjacent shoulder 13, as shown in the top right hand recess 11 of Fig. 2.
- the present tubing anchor can be quickly and readily joined to the end of or between sections of a tube by screwing threaded portion 4 into a threaded bore of the tubing until the end of the tubing contact-s reduced portion 2. whereby it is stopped from further downward movement. Additional sections'of the tubing canbe connected to the opposite end of housing 1 by screwing a threaded peripheral end portion of a tubing int-o bore 6 and engaging thread 7 until stopped by shoulder 8.
- tubing having the present anchor attached thereto can be inserted in the usual well casing whose diameter is suflicient for slidably receiving housing 1.
- media under pressure can be introduced through the bore of the tubing and when it reaches bore 9 of the present device, the media will extend through ports 12 against the bottoms 23 of each piston slip 17 moving said piston slips to the position shown in the middle right hand recess 11 of Fig. 2 against coil springs 24 retained by their respective bar 15 with the serrated face 18 of the piston thereupon extending beyond the bar 15 and periphery of housing 1 for biting into the surrounding casing.
- the serrations 18 will bite into the casing face firmly anchoring the device in position and preventing the 3 tubing from moving either radially or longitudinally of the casing. Fluids in the space between the tubing and easing can readily pass around housing 1 by passing through the recessed portions, 10.
- Rings or packings 22 will bear against the walls of recess 11 preventing the leakage of media around said pistons which might reduce the pressure in bore 9 and therefore the full force of the pressure can be maintained against each piston.
- each piston 17 Upon the operator releasing the pressure within the tubing and bore 9, each piston 17 will automatically return within its recess 11 due to the action of the springs 24 bearing thereagainst. Thereafter the tubing can be moved up or down within the casing as desired.
- a device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having a plurality of series of cylindrical recesses provided in the outer face thereof with each series extending in substantially a straight line and a bore extending longitudinally through said housing, a plurality of pistons each slidably mounted in one of said cylindrical recesses and having a serrated casing gripping head which has a recess provided thereacross, a plurality of bars fixedly mounted on the outer face of said housing with each bar extending across the recesses of one of said series of cylindrical recesses and positioned for entering said recesses of said pistons upon the outward movement of said pistons, said housing further having a plurality of ports each extending from said bore to one of said cylindrical recesses and resilient means positioned between said bars and said pistons and tending to move said pistons towards the bottoms of their respective cylindrical recesses.
- a device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having a plurality of straight line series of cylindrical recesses provided in the outer face thereof and a bore extending longitudinally therethrough, a plurality of pistons each slidably mounted in one of said cylindrical recesses, each of said pistons having a diametrically extending recess and easing engaging serrations provided in the outer face thereof, a plurality of 3.
- a device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having at least one series of cylindrical recesses provided in the outer face thereof and a bore extending longitudinally therethrough, a plurality of pistons each slidably mounted in one of said cylindrical recesses, each of said pistons having a diametrically extending recess provided in the outer face thereof and a plurality of guide recesses opening into said diametrical recess, at least one bar mounted on the outer face of said housing and extending diametrically across the recesses of a series of said housing cylindrical recesses for entering said piston diametrical recesses upon outward movement of said pistons, a plurality of coil springs each mounted in one of said piston guide recesses and extending through its respective piston diametrical recess against the bar positioned in line therewitth, said housing having a plurality of ports positioned for-placing said housing bore in communication with one of said cylindrical recesses and
- a device for anchoring tubing to a Well casing comprising a tubular housing adapted to be interconnected in a length of tubing and having a plurality of series of radially extending cylindrical recesses provided in the periphery of said housing with each series of recesses extending longitudinally of said housing, said housing further having a plurality of ports each of a smaller diameter than one of said cylindrical recesses and extending radially.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Description
May 14, 1957 E. w. JONES DEVICE FOR ANCHORING TUBING Filed March 30, 1953 INVENTOR EARL I44 JONES ATTORNEYS Stat DEVICE FOR AN CHORlNG TUBING Earl W. Jones, Abilene, Tex., assignor to H-J-M Tool Company, Abilene, Tex.
Application March 30, 1953,'Serial No. 345,400
4 Claims. (Cl. 166-212) desirable to anchor or hold down the tube against the influences of these vibrations or pressures thereagainst and to this end one or more of the present anchors can be connected in the length of tubing and will grip the surrounding casing duringthe passage of the pressurized fluid retaining-the tubing against longitudinal and lateral movements.
Accordingly, the principal object of the present device is to provide a device which can be quickly and easily interconnected in lengths of tubing and will automatically grip a surrounding casing for holding said tubing in position during the introduction of pressurized media into said tubing, yet will release the casing when the pressure in the casing is equal to orexceeds the pressure in said tubing.
A further and equally important object of the invention is to provide a tubing anchor which is positive acting under adverse conditions, will not permit the loss of pressure within the'connected tubing, and through its simplicity of construction can be economically produced and maintained.
Further objects of the invention will be in part pointed out and in part obvious in the following description of the accompanying drawings, wherein:
Fig. 1 is a side elevation of the present tube anchor.
Fig. 2 is a vertical cross-sectional view of the tube anchor taken on line 2-2 of Figs. 1 and 3, but illustrating the various positions of the pistons.
Fig. 3 is a horizontal cross-sectional view of the tube anchor casing taken on line 33 of Fig. 2.
Fig. 4 is a view of the top outer face of one of the pistons forming a part of the present device.
Fig. 5 is a side elevation of said piston, and
Fig. 6 is a cross sectional View of said piston taken on line 66 of Fig. 4.
Referring now more particularly to the accompanying drawings wherein like and corresponding parts are desig nated by similar reference characters, numeral 1 refers to the anchor tubing housing, which in the present form as illustrated in the drawings, is of a cylindrical configuration and has a reduced portion 2 extending from the top end of said housing with a further reduced portion 3 having a threaded peripheral portion 4. The opposite end of said housing has a reduced portion 5 extending from the lower end thereof. The bore 6 of said portion 5 is threaded as at 7 and thereafter tapers inwardly as at 8 forming a stop. A bore 9 extends from stop 8 through housing 1 and its connected portions 2, 3 and 4.
- Patented May 14, .1957
The exterior of housing 1 has a series of longitudinally extending grooves 10 formed in the periphery thereof for providing a channelway for the passage of fluid past said housing.
the longitudinal center line thereof extending across a diameter of each recess of one series thereof. A plurality of bars 15 each are positioned in one of said slots 14 whereby the bar extends longitudinally of housing 1 and across the centers of recesses 11 of one series. Bars 15 having a series of openings therethrough with housing 1 having corresponding threaded recesses whereby screws 16 are employed for fastening bars 15 throughout their length to housing 1. Apluralityof piston slips 17, each having a rounded serrated top surface 18 with a diametrical slot 19, are each positioned in one of said recesses 11. Said pistons 17 are of an annular configuration and sized for sliding fit within its respective recess 11. A pair of guide recesses 20 are also formed in each piston 17 with a guide recess opening into slot 19. The periphery of each piston also has a plurality of annular recesses 21 extending therearound in which are positioned rings or p'ackings 22. The bottom face 23 of each piston 17 is flat for coinciding with shoulders 13 of the respective recess and extending across the respective port 12. Each piston is arranged inits recess with one of said bars '15 extending partially within slot 19. A pair of coil springs '24 are each mounted within one of said guide recesses 20 of each pistonand extends through slot 19 across the bar 15 positioned outwardly thereof for normally moving the piston 17 inwardly, until bottom 23 contacts the adjacent shoulder 13, as shown in the top right hand recess 11 of Fig. 2. The present tubing anchor can be quickly and readily joined to the end of or between sections of a tube by screwing threaded portion 4 into a threaded bore of the tubing until the end of the tubing contact-s reduced portion 2. whereby it is stopped from further downward movement. Additional sections'of the tubing canbe connected to the opposite end of housing 1 by screwing a threaded peripheral end portion of a tubing int-o bore 6 and engaging thread 7 until stopped by shoulder 8. Thus the tubing having the present anchor attached thereto can be inserted in the usual well casing whose diameter is suflicient for slidably receiving housing 1. When it is desired to anchor the tubing in the housing, media under pressure can be introduced through the bore of the tubing and when it reaches bore 9 of the present device, the media will extend through ports 12 against the bottoms 23 of each piston slip 17 moving said piston slips to the position shown in the middle right hand recess 11 of Fig. 2 against coil springs 24 retained by their respective bar 15 with the serrated face 18 of the piston thereupon extending beyond the bar 15 and periphery of housing 1 for biting into the surrounding casing. The serrations 18 will bite into the casing face firmly anchoring the device in position and preventing the 3 tubing from moving either radially or longitudinally of the casing. Fluids in the space between the tubing and easing can readily pass around housing 1 by passing through the recessed portions, 10.
Rings or packings 22 will bear against the walls of recess 11 preventing the leakage of media around said pistons which might reduce the pressure in bore 9 and therefore the full force of the pressure can be maintained against each piston.
Upon the operator releasing the pressure within the tubing and bore 9, each piston 17 will automatically return within its recess 11 due to the action of the springs 24 bearing thereagainst. Thereafter the tubing can be moved up or down within the casing as desired.
It is to be appreciated that the present device is capable of considerable modification and such changes thereto as come within the scope of the appended claims is deemed to be a part of the invention.
What I claim is:
l. A device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having a plurality of series of cylindrical recesses provided in the outer face thereof with each series extending in substantially a straight line and a bore extending longitudinally through said housing, a plurality of pistons each slidably mounted in one of said cylindrical recesses and having a serrated casing gripping head which has a recess provided thereacross, a plurality of bars fixedly mounted on the outer face of said housing with each bar extending across the recesses of one of said series of cylindrical recesses and positioned for entering said recesses of said pistons upon the outward movement of said pistons, said housing further having a plurality of ports each extending from said bore to one of said cylindrical recesses and resilient means positioned between said bars and said pistons and tending to move said pistons towards the bottoms of their respective cylindrical recesses. V
2. A device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having a plurality of straight line series of cylindrical recesses provided in the outer face thereof and a bore extending longitudinally therethrough, a plurality of pistons each slidably mounted in one of said cylindrical recesses, each of said pistons having a diametrically extending recess and easing engaging serrations provided in the outer face thereof, a plurality of 3. A device for anchoring tubing to a well casing comprising a housing adapted to be interconnected in a length of tubing and having at least one series of cylindrical recesses provided in the outer face thereof and a bore extending longitudinally therethrough, a plurality of pistons each slidably mounted in one of said cylindrical recesses, each of said pistons having a diametrically extending recess provided in the outer face thereof and a plurality of guide recesses opening into said diametrical recess, at least one bar mounted on the outer face of said housing and extending diametrically across the recesses of a series of said housing cylindrical recesses for entering said piston diametrical recesses upon outward movement of said pistons, a plurality of coil springs each mounted in one of said piston guide recesses and extending through its respective piston diametrical recess against the bar positioned in line therewitth, said housing having a plurality of ports positioned for-placing said housing bore in communication with one of said cylindrical recesses and each of said pistons having serrations provided on the outer face thereof on either side of said diametrical recesses thereof. 1
4. A device for anchoring tubing to a Well casing comprising a tubular housing adapted to be interconnected in a length of tubing and having a plurality of series of radially extending cylindrical recesses provided in the periphery of said housing with each series of recesses extending longitudinally of said housing, said housing further having a plurality of ports each of a smaller diameter than one of said cylindrical recesses and extending radially. of said housing between one of said cylindrical recesses and the bore of said housing, a plurality of pistons each slidably mounted in one of said cylindrical recesses having casing engaging serrations provided in its outer j face and being of a larger diameter than the connecting port, 'rings mounted on the periphery of each of said pistons for sealing the space between said piston periphcry and the wall of its respective cylindrical recess, means mounted on said housing for limiting the outward move- .ment of said pistons and meanspositioned between said 7 piston and said piston limiting means tending to move I said pistons towards said housing bore.
References Cited in the file of this patent UNITED STATES PATENTS 789,867 'McCallum May 16, 1905 1,694,870 Scott Dec. 11, 1928 2,159,640 Strom May 23, 1939 2,546,669 Kirby Mar. 27, 1951 2,565,736 McCarvell Aug. 28, 1951 2,603,292 Page July 15, 1952 2,612,346 Nelson Sept. 30, 1952 FOREIGN PATENTSv 1,087,045 France Aug. 18, 1954
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US345400A US2792063A (en) | 1953-03-30 | 1953-03-30 | Device for anchoring tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US345400A US2792063A (en) | 1953-03-30 | 1953-03-30 | Device for anchoring tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2792063A true US2792063A (en) | 1957-05-14 |
Family
ID=23354890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US345400A Expired - Lifetime US2792063A (en) | 1953-03-30 | 1953-03-30 | Device for anchoring tubing |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2792063A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045756A (en) * | 1958-08-26 | 1962-07-24 | Halliburton Co | Wireline well treating apparatus |
| US3045754A (en) * | 1958-04-29 | 1962-07-24 | Baker Oil Tools Inc | Parallel tubing string packer and anchor |
| US3080924A (en) * | 1960-03-18 | 1963-03-12 | Baker Oil Tools Inc | Anchors for tubular strings |
| US3130786A (en) * | 1960-06-03 | 1964-04-28 | Western Co Of North America | Perforating apparatus |
| US3131769A (en) * | 1962-04-09 | 1964-05-05 | Baker Oil Tools Inc | Hydraulic anchors for tubular strings |
| DE1203196B (en) * | 1961-08-14 | 1965-10-21 | Baker Oil Tools Inc | Riser pipe anchor for borehole casing |
| DE3420788A1 (en) * | 1983-06-08 | 1984-12-13 | Institut gornogo dela Sibirskogo otdelenija Akademii Nauk SSSR, Novosibirsk | REVERSIBLE DEVICE WITH IMPACT |
| WO1994005891A1 (en) * | 1992-09-02 | 1994-03-17 | The Red Baron (Oil Tools Rental) Limited | Drill string anchor |
| US5931237A (en) * | 1996-06-18 | 1999-08-03 | Dynamic In Situ Geotechnical Testing, Inc. | Soil testing assemblies |
| US20090255683A1 (en) * | 2008-04-10 | 2009-10-15 | Mouton David E | Landing string compensator |
| CN103046867A (en) * | 2011-10-14 | 2013-04-17 | 倪元武 | Underground stepping drilling device |
| US20130206392A1 (en) * | 2011-08-08 | 2013-08-15 | Scott Sherman | Fracturing Tool Anchor |
| US20150259997A1 (en) * | 2014-03-17 | 2015-09-17 | Pcm Technologies | Torque Anchor to Prevent Rotation of Well Production Tubing, System for Pumping and Rotation Prevention, and Pumping Installation Equipped with Such a Torque Anchor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US789867A (en) * | 1905-01-23 | 1905-05-16 | Mather & Platt Ltd | Tube-cutting apparatus. |
| US1694870A (en) * | 1928-02-04 | 1928-12-11 | Hughes Tool Co | Support for reamer cutters |
| US2159640A (en) * | 1938-08-29 | 1939-05-23 | Carl E Strom | Deep well cementing device |
| US2546669A (en) * | 1946-05-07 | 1951-03-27 | John H Kirby | Hydraulic side wall coring tool |
| US2565736A (en) * | 1945-05-05 | 1951-08-28 | John H Mccarvell | Well tool |
| US2603292A (en) * | 1952-07-15 | Anchor | ||
| US2612346A (en) * | 1951-06-27 | 1952-09-30 | Standard Oil Dev Co | Device for obtaining samples from well bores |
| FR1087045A (en) * | 1952-08-25 | 1955-02-18 | Guiberson Corp | Hydraulically operated anchoring tool, especially for oil wells and similar applications |
-
1953
- 1953-03-30 US US345400A patent/US2792063A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2603292A (en) * | 1952-07-15 | Anchor | ||
| US789867A (en) * | 1905-01-23 | 1905-05-16 | Mather & Platt Ltd | Tube-cutting apparatus. |
| US1694870A (en) * | 1928-02-04 | 1928-12-11 | Hughes Tool Co | Support for reamer cutters |
| US2159640A (en) * | 1938-08-29 | 1939-05-23 | Carl E Strom | Deep well cementing device |
| US2565736A (en) * | 1945-05-05 | 1951-08-28 | John H Mccarvell | Well tool |
| US2546669A (en) * | 1946-05-07 | 1951-03-27 | John H Kirby | Hydraulic side wall coring tool |
| US2612346A (en) * | 1951-06-27 | 1952-09-30 | Standard Oil Dev Co | Device for obtaining samples from well bores |
| FR1087045A (en) * | 1952-08-25 | 1955-02-18 | Guiberson Corp | Hydraulically operated anchoring tool, especially for oil wells and similar applications |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045754A (en) * | 1958-04-29 | 1962-07-24 | Baker Oil Tools Inc | Parallel tubing string packer and anchor |
| US3045756A (en) * | 1958-08-26 | 1962-07-24 | Halliburton Co | Wireline well treating apparatus |
| US3080924A (en) * | 1960-03-18 | 1963-03-12 | Baker Oil Tools Inc | Anchors for tubular strings |
| US3130786A (en) * | 1960-06-03 | 1964-04-28 | Western Co Of North America | Perforating apparatus |
| DE1203196B (en) * | 1961-08-14 | 1965-10-21 | Baker Oil Tools Inc | Riser pipe anchor for borehole casing |
| US3131769A (en) * | 1962-04-09 | 1964-05-05 | Baker Oil Tools Inc | Hydraulic anchors for tubular strings |
| DE3420788A1 (en) * | 1983-06-08 | 1984-12-13 | Institut gornogo dela Sibirskogo otdelenija Akademii Nauk SSSR, Novosibirsk | REVERSIBLE DEVICE WITH IMPACT |
| GB2270331B (en) * | 1992-09-02 | 1996-03-06 | Red Baron | Drill string anchor |
| WO1994005891A1 (en) * | 1992-09-02 | 1994-03-17 | The Red Baron (Oil Tools Rental) Limited | Drill string anchor |
| US5531280A (en) * | 1992-09-02 | 1996-07-02 | Steinkamp; Manfred | Drill string anchor |
| AU672040B2 (en) * | 1992-09-02 | 1996-09-19 | Red Baron (Oil Tools Rental) Limited, The | Drill string anchor |
| US5931237A (en) * | 1996-06-18 | 1999-08-03 | Dynamic In Situ Geotechnical Testing, Inc. | Soil testing assemblies |
| US20090255683A1 (en) * | 2008-04-10 | 2009-10-15 | Mouton David E | Landing string compensator |
| US8733447B2 (en) | 2008-04-10 | 2014-05-27 | Weatherford/Lamb, Inc. | Landing string compensator |
| US20130206392A1 (en) * | 2011-08-08 | 2013-08-15 | Scott Sherman | Fracturing Tool Anchor |
| US9458686B2 (en) * | 2011-08-08 | 2016-10-04 | Trican Well Service Ltd. | Fracturing tool anchor |
| CN103046867A (en) * | 2011-10-14 | 2013-04-17 | 倪元武 | Underground stepping drilling device |
| US20150259997A1 (en) * | 2014-03-17 | 2015-09-17 | Pcm Technologies | Torque Anchor to Prevent Rotation of Well Production Tubing, System for Pumping and Rotation Prevention, and Pumping Installation Equipped with Such a Torque Anchor |
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