WO1996018799A1 - Method and apparatus for connecting and disconnecting tubulars - Google Patents
Method and apparatus for connecting and disconnecting tubulars Download PDFInfo
- Publication number
- WO1996018799A1 WO1996018799A1 PCT/GB1995/002953 GB9502953W WO9618799A1 WO 1996018799 A1 WO1996018799 A1 WO 1996018799A1 GB 9502953 W GB9502953 W GB 9502953W WO 9618799 A1 WO9618799 A1 WO 9618799A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casing
- drive shaft
- top drive
- head
- main elevator
- Prior art date
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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
Definitions
- This invention relates to a method and apparatus for connecting and disconnecting tubulars.
- a hole is bored into the earth.
- Lengths of casing are then screwed together to form stands and lowered into the bore, inter alia to prevent the wall of the bore collap ⁇ sing and to carry oil or gas to the surface.
- slips are applied which support the casing whilst the next stand of casing is screwed into the casing in the slips.
- the slips are released and the new stand lowered into the bore. This process is repeated until the desired length of casing has been lowered into the bore.
- Top drives are generally hydraulically or electrically operated.
- a method for connecting tubulars comprises the step of rotating one tubular relative to another with a top drive.
- an apparatus for use in a method in accordance with the present invention which appara ⁇ tus comprises a head for gripping a length of casing and a drive shaft which extends from said head and is rotat- able by a top drive.
- said drive shaft is telescopically extendible.
- said drive shaft is hollow and includes an upper section and a lower section and where ⁇ in said apparatus further includes a packer actuable when said drive shaft is fully contracted to provide a seal between said upper section and said lower section.
- a chamber is provided which can be pressurized to contract said drive shaft.
- said head comprises a plurality of jaws and a plurality of actuators for urging said jaws into engagement with said casing.
- the apparatus includes a support block for supporting a main elevator.
- the apparatus includes a pair of bails and a main elevator wherein said bails are mounted on opposite sides of said support block and said main elevator is connected to said bails.
- a joint may be provided to enable the head to be pivoted to facilitate handling the stands of casing.
- a universal joint is preferred although this is not essential.
- the present invention also provides a top drive provided with an apparatus in accordance with the pre ⁇ sent invention. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- Fig 1 is a perspective view of one embodiment of a drilling rig provided with a top drive and an apparatus in accordance with the present invention
- Fig 2 is a view of a detail of a second embodiment
- Fig 3 is a side view of a third embodiment of part of a drilling rig provided with a top drive and an apparatus in accordance with the invention.
- the drilling rig 1 comprises a top drive 2 which is supported by a travelling block 3.
- the top drive 2 is mounted on a carriage 4 which is slidably mounted on rails 5.
- a telescopic drive shaft 6 is connected to the bottom of the top drive 2 and comprises an upper section 7 and a lower section 8 which are provided with interen- gaging internal and external splines respectively.
- the telescopic drive shaft 6 extends through a bore in a support block 9 which is suspended from the top drive 2 by a hollow tubular member 20.
- Two bails 10 are disposed to opposite sides of the support block 9 and support main elevator 11.
- the lower section 8 of the telescopic drive shaft 6 is connected to a head 12 which comprises six gripping jaws (not shown) which are actuable by respective hy ⁇ draulic rams 13.
- ancil- lary handling equipment such as an auxiliary elevator or a pipe handling device and gripped by main elevator 11.
- the stand of casing is then lowered into the bore by lowering the top drive 2.
- slips 14 are applied to prevent the casing 15 falling down the bore.
- Main elevator 11 is then disconnected and raised to the top of the drilling rig 1.
- a new stand of casing 16 is then moved into axial alignment with the casing 15 by the pipe handling de- vice.
- Top drive 2 is then lowered until the head 12 surrounds the socket on the top of the stand of casing 16.
- the top drive 2 is then lowered a further few cm (typically 10 to 20 cms) during which time the lower section 8 of the telescopic drive shaft 6 enters the upper section 7.
- the hydraulic rams 13 are then applied to urge a plurality of jaws (not shown) into engagement with the head 12.
- the main elevator 11 is placed around the casing 11 but is NOT moved into gripping engagement with the casing 16 at this stage.
- the pipe positioning device is then lowered to allow the bottom end of the stand of casing 16 to enter the socket 17 on the top of the casing 15.
- Top drive 2 is then actuated to rotate the tele ⁇ scopic drive shaft 6, the head 12 and the casing 16.
- the lower section 8 slides downwardly relative to the upper section 7 and relative to the main elevator 11 which does not rotate with the telescopic drive shaft 6.
- the pipe handling device may be released or lowered in a controlled manner to inhibit damage to the threads.
- vertical movement of the pipe handling device may be controlled by a pneumatic cylinder which simply compresses as the casing 16 enters the socket 17.
- top drive 2 is electric the torque applied to the joint can be limited by limiting the maximum current to the top drive 2.
- the torque applied to the joint can be limited by limiting the maximum pressure of the hydrau ⁇ lic fluid.
- the top drive 2 is then lowered until the casing 16 occupies the position initially occupied by the casing 15 at which time the process is repeated.
- the telescopic drive shaft 6' comprises an upper section 7' and a lower section 8' which are biased together by compressed air introduced into chamber 18 via hose 19.
- the chamber 18 Prior to lowering the head 12 onto a new stand of casing the chamber 18 is pressurised with compressed air to fully contract the telescopic drive shaft 6. The top drive 2 is then lowered until the head 12 is circumja ⁇ cent the casing 15. The hydraulic rams 13 are then actuated.
- the casing 16 When the top drive 2 is rotated the casing 16 enters the socket 17 and the pressure in the chamber 18 increases as the casing 16 moves downwardly.
- the pneu ⁇ matic cushion provided by the compressed air in chamber 18 allows the joint to be made with minimal risk of damage to the threads.
- top drive 2" is suspended from travelling block 3".
- Support block 9" is bolted directly to the housing of top drive 2" and is provided with ears for accommodating bails (not shown).
- a drive shaft extends downwardly from the top drive 2" to universal joint 21" which in turn supports tele ⁇ scopic drive shaft 6" which comprises an upper section 7" provided with external splines and a lower section 8" which is provided with internal splines and which is fast with head 12".
- the universal join 21" allows the head 12" to be pivoted to facilitate the connection of stands of cas ⁇ ing.
- a further refinement of this embodiment is that, above the external splines the upper section 7" is provided with an inflatable packer 22".
- the drive shaft 6" is hollow.
- the main elevator is then relaxed and travelling block 3" lowered.
- the head 12" engages the top of the casing and the upper section 7" of the drive shaft 6" enters the lower section 8" until the inflat ⁇ able packer 22" lies inside the lower section 8".
- the inflatable packer is then inflated. Mud is then pumped down the well via a hose 23, the drive shaft of the top drive 2" (which is hollow), a flexible hose (not visible) extending across the univer ⁇ sal joint 21", and through the hollow drive shaft 6".
- a resilient annular sealing member 23" is also provided to form a seal between the head 12" and the top of the socket on the casing.
- the purpose of pumping mud down the hole is to try and free any blockage. After pumping has been continued for a given period, for example 10 minutes, the flow of mud is stopped.
- the travelling block 3" is then raised until the main elevator is just below the socket.
- the main elevator is then applied to the casing and is then raised to enable the stops to be released.
- the travel ⁇ ling block 3" is then lowered. If the blockage has not been cleared the slips are re-applied and the procedure repeated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU42667/96A AU4266796A (en) | 1994-12-17 | 1995-12-18 | Method and apparatus for connecting and disconnecting tubulars |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9425499.2A GB9425499D0 (en) | 1994-12-17 | 1994-12-17 | Method and apparatus for connecting and disconnecting tubulars |
GB9425499.2 | 1994-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996018799A1 true WO1996018799A1 (en) | 1996-06-20 |
Family
ID=10766102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1995/002953 WO1996018799A1 (en) | 1994-12-17 | 1995-12-18 | Method and apparatus for connecting and disconnecting tubulars |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU4266796A (es) |
GB (1) | GB9425499D0 (es) |
WO (1) | WO1996018799A1 (es) |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005844A1 (en) * | 1996-07-31 | 1998-02-12 | Weatherford/Lamb, Inc. | Mechanism for connecting and disconnecting tubulars |
WO2000005483A1 (en) * | 1998-07-22 | 2000-02-03 | Weatherford/Lamb, Inc. | Connection of tubulars using a top drive |
WO2000052297A3 (en) * | 1999-03-05 | 2000-12-21 | Varco Int | Pipe running tool |
WO2002092959A1 (en) * | 2001-05-17 | 2002-11-21 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
US6527493B1 (en) | 1997-12-05 | 2003-03-04 | Varco I/P, Inc. | Handling of tube sections in a rig for subsoil drilling |
US6527047B1 (en) | 1998-08-24 | 2003-03-04 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US6536520B1 (en) | 2000-04-17 | 2003-03-25 | Weatherford/Lamb, Inc. | Top drive casing system |
US6622796B1 (en) | 1998-12-24 | 2003-09-23 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6637526B2 (en) | 1999-03-05 | 2003-10-28 | Varco I/P, Inc. | Offset elevator for a pipe running tool and a method of using a pipe running tool |
US6691801B2 (en) | 1999-03-05 | 2004-02-17 | Varco I/P, Inc. | Load compensator for a pipe running tool |
US6705405B1 (en) | 1998-08-24 | 2004-03-16 | Weatherford/Lamb, Inc. | Apparatus and method for connecting tubulars using a top drive |
US6725938B1 (en) | 1998-12-24 | 2004-04-27 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6742584B1 (en) | 1998-09-25 | 2004-06-01 | Tesco Corporation | Apparatus for facilitating the connection of tubulars using a top drive |
EP1475512A1 (en) * | 1999-03-05 | 2004-11-10 | Varco I/P, Inc. | Pipe running tool |
US6976298B1 (en) | 1998-08-24 | 2005-12-20 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
US7510006B2 (en) | 1999-03-05 | 2009-03-31 | Varco I/P, Inc. | Pipe running tool having a cement path |
US7591304B2 (en) | 1999-03-05 | 2009-09-22 | Varco I/P, Inc. | Pipe running tool having wireless telemetry |
US7635026B2 (en) | 1996-10-04 | 2009-12-22 | Frank's International, Inc. | Methods and devices for forming a wellbore with casing |
US7699121B2 (en) | 1999-03-05 | 2010-04-20 | Varco I/P, Inc. | Pipe running tool having a primary load path |
US7753138B2 (en) | 1999-03-05 | 2010-07-13 | Varco I/P, Inc. | Pipe running tool having internal gripper |
US7770654B2 (en) | 2003-11-10 | 2010-08-10 | Tesco Corporation | Pipe handling device, method and system |
US7866390B2 (en) | 1996-10-04 | 2011-01-11 | Frank's International, Inc. | Casing make-up and running tool adapted for fluid and cement control |
USRE42877E1 (en) | 2003-02-07 | 2011-11-01 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US8136603B2 (en) | 2009-09-01 | 2012-03-20 | Tesco Corporation | Method of preventing dropped casing string with axial load sensor |
US8191621B2 (en) | 2009-05-29 | 2012-06-05 | Tesco Corporation | Casing stabbing guide and method of use thereof |
US8240371B2 (en) | 2009-06-15 | 2012-08-14 | Tesco Corporation | Multi-function sub for use with casing running string |
US8281877B2 (en) | 1998-09-02 | 2012-10-09 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
US8567512B2 (en) | 2003-03-05 | 2013-10-29 | Weatherford/Lamb, Inc. | Apparatus for gripping a tubular on a drilling rig |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3747675A (en) * | 1968-11-25 | 1973-07-24 | C Brown | Rotary drive connection for casing drilling string |
US3766991A (en) * | 1971-04-02 | 1973-10-23 | Brown Oil Tools | Electric power swivel and system for use in rotary well drilling |
US4209066A (en) * | 1978-11-17 | 1980-06-24 | Watson Barry R | Method and apparatus for running tubular goods into and out of a borehole |
EP0089599A1 (fr) * | 1982-03-17 | 1983-09-28 | Alsthom | Dispositif de manutention de tiges de forage |
US4625796A (en) * | 1985-04-01 | 1986-12-02 | Varco International, Inc. | Well pipe stabbing and back-up apparatus |
EP0285386A2 (en) * | 1987-04-02 | 1988-10-05 | W-N Apache Corporation | Internal wrench for a top head drive assembly |
US4781359A (en) * | 1987-09-23 | 1988-11-01 | National-Oilwell | Sub assembly for a swivel |
EP0311455A1 (en) * | 1987-10-09 | 1989-04-12 | W-N Apache Corporation | Compact casing tongs for use on top head drive earth drilling machine |
EP0423055A2 (en) * | 1989-10-10 | 1991-04-17 | Varco International, Inc. | Detachable torque transmitting tool joint |
US5036927A (en) * | 1989-03-10 | 1991-08-06 | W-N Apache Corporation | Apparatus for gripping a down hole tubular for rotation |
-
1994
- 1994-12-17 GB GBGB9425499.2A patent/GB9425499D0/en active Pending
-
1995
- 1995-12-18 AU AU42667/96A patent/AU4266796A/en not_active Abandoned
- 1995-12-18 WO PCT/GB1995/002953 patent/WO1996018799A1/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3747675A (en) * | 1968-11-25 | 1973-07-24 | C Brown | Rotary drive connection for casing drilling string |
US3766991A (en) * | 1971-04-02 | 1973-10-23 | Brown Oil Tools | Electric power swivel and system for use in rotary well drilling |
US4209066A (en) * | 1978-11-17 | 1980-06-24 | Watson Barry R | Method and apparatus for running tubular goods into and out of a borehole |
EP0089599A1 (fr) * | 1982-03-17 | 1983-09-28 | Alsthom | Dispositif de manutention de tiges de forage |
US4625796A (en) * | 1985-04-01 | 1986-12-02 | Varco International, Inc. | Well pipe stabbing and back-up apparatus |
EP0285386A2 (en) * | 1987-04-02 | 1988-10-05 | W-N Apache Corporation | Internal wrench for a top head drive assembly |
US4781359A (en) * | 1987-09-23 | 1988-11-01 | National-Oilwell | Sub assembly for a swivel |
EP0311455A1 (en) * | 1987-10-09 | 1989-04-12 | W-N Apache Corporation | Compact casing tongs for use on top head drive earth drilling machine |
US5036927A (en) * | 1989-03-10 | 1991-08-06 | W-N Apache Corporation | Apparatus for gripping a down hole tubular for rotation |
EP0423055A2 (en) * | 1989-10-10 | 1991-04-17 | Varco International, Inc. | Detachable torque transmitting tool joint |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005844A1 (en) * | 1996-07-31 | 1998-02-12 | Weatherford/Lamb, Inc. | Mechanism for connecting and disconnecting tubulars |
US5839330A (en) * | 1996-07-31 | 1998-11-24 | Weatherford/Lamb, Inc. | Mechanism for connecting and disconnecting tubulars |
AU715011B2 (en) * | 1996-07-31 | 2000-01-13 | Weatherford Technology Holdings, Llc | Mechanism for connecting and disconnecting tubulars |
US7635026B2 (en) | 1996-10-04 | 2009-12-22 | Frank's International, Inc. | Methods and devices for forming a wellbore with casing |
US8082982B2 (en) | 1996-10-04 | 2011-12-27 | Frank's International, Inc. | Methods and devices for forming a wellbore with casing |
US7866390B2 (en) | 1996-10-04 | 2011-01-11 | Frank's International, Inc. | Casing make-up and running tool adapted for fluid and cement control |
US7874361B2 (en) | 1996-10-04 | 2011-01-25 | Frank's International, Inc. | Methods and devices for forming a wellbore with casing |
US6527493B1 (en) | 1997-12-05 | 2003-03-04 | Varco I/P, Inc. | Handling of tube sections in a rig for subsoil drilling |
WO2000005483A1 (en) * | 1998-07-22 | 2000-02-03 | Weatherford/Lamb, Inc. | Connection of tubulars using a top drive |
AU770288B2 (en) * | 1998-07-22 | 2004-02-19 | Weatherford Technology Holdings, Llc | Connection of tubulars using a top drive |
US6688398B2 (en) | 1998-08-24 | 2004-02-10 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US7021374B2 (en) | 1998-08-24 | 2006-04-04 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US6527047B1 (en) | 1998-08-24 | 2003-03-04 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
US6976298B1 (en) | 1998-08-24 | 2005-12-20 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
US6705405B1 (en) | 1998-08-24 | 2004-03-16 | Weatherford/Lamb, Inc. | Apparatus and method for connecting tubulars using a top drive |
US8281877B2 (en) | 1998-09-02 | 2012-10-09 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
US6742584B1 (en) | 1998-09-25 | 2004-06-01 | Tesco Corporation | Apparatus for facilitating the connection of tubulars using a top drive |
US20120145408A1 (en) * | 1998-12-24 | 2012-06-14 | Bernd-Georg Pietras | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6725938B1 (en) | 1998-12-24 | 2004-04-27 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6622796B1 (en) | 1998-12-24 | 2003-09-23 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6637526B2 (en) | 1999-03-05 | 2003-10-28 | Varco I/P, Inc. | Offset elevator for a pipe running tool and a method of using a pipe running tool |
US6443241B1 (en) | 1999-03-05 | 2002-09-03 | Varco I/P, Inc. | Pipe running tool |
EP1475512A1 (en) * | 1999-03-05 | 2004-11-10 | Varco I/P, Inc. | Pipe running tool |
US7096977B2 (en) | 1999-03-05 | 2006-08-29 | Varco I/P, Inc. | Pipe running tool |
US7510006B2 (en) | 1999-03-05 | 2009-03-31 | Varco I/P, Inc. | Pipe running tool having a cement path |
US7591304B2 (en) | 1999-03-05 | 2009-09-22 | Varco I/P, Inc. | Pipe running tool having wireless telemetry |
US6938709B2 (en) | 1999-03-05 | 2005-09-06 | Varco International, Inc. | Pipe running tool |
US7699121B2 (en) | 1999-03-05 | 2010-04-20 | Varco I/P, Inc. | Pipe running tool having a primary load path |
US7753138B2 (en) | 1999-03-05 | 2010-07-13 | Varco I/P, Inc. | Pipe running tool having internal gripper |
WO2000052297A3 (en) * | 1999-03-05 | 2000-12-21 | Varco Int | Pipe running tool |
US6691801B2 (en) | 1999-03-05 | 2004-02-17 | Varco I/P, Inc. | Load compensator for a pipe running tool |
US8037949B2 (en) | 1999-03-05 | 2011-10-18 | Varco I/P, Inc. | Pipe running tool |
US6536520B1 (en) | 2000-04-17 | 2003-03-25 | Weatherford/Lamb, Inc. | Top drive casing system |
US6742596B2 (en) | 2001-05-17 | 2004-06-01 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
WO2002092959A1 (en) * | 2001-05-17 | 2002-11-21 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
US8517090B2 (en) | 2001-05-17 | 2013-08-27 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
NO335408B1 (no) * | 2001-05-17 | 2014-12-08 | Weatherford Lamb | Anordning og fremgangsmåte for forrigling ved sammenstilling av rør |
USRE42877E1 (en) | 2003-02-07 | 2011-11-01 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
US8567512B2 (en) | 2003-03-05 | 2013-10-29 | Weatherford/Lamb, Inc. | Apparatus for gripping a tubular on a drilling rig |
US10138690B2 (en) | 2003-03-05 | 2018-11-27 | Weatherford Technology Holdings, Llc | Apparatus for gripping a tubular on a drilling rig |
US7770654B2 (en) | 2003-11-10 | 2010-08-10 | Tesco Corporation | Pipe handling device, method and system |
US8191621B2 (en) | 2009-05-29 | 2012-06-05 | Tesco Corporation | Casing stabbing guide and method of use thereof |
US8240371B2 (en) | 2009-06-15 | 2012-08-14 | Tesco Corporation | Multi-function sub for use with casing running string |
US8136603B2 (en) | 2009-09-01 | 2012-03-20 | Tesco Corporation | Method of preventing dropped casing string with axial load sensor |
Also Published As
Publication number | Publication date |
---|---|
AU4266796A (en) | 1996-07-03 |
GB9425499D0 (en) | 1995-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1996018799A1 (en) | Method and apparatus for connecting and disconnecting tubulars | |
US5682952A (en) | Extendable casing circulator and method | |
US11459835B2 (en) | Dual device apparatus and methods usable in well drilling and other operations | |
US7004259B2 (en) | Apparatus and method for facilitating the connection of tubulars using a top drive | |
US7213656B2 (en) | Apparatus and method for facilitating the connection of tubulars using a top drive | |
US7140445B2 (en) | Method and apparatus for drilling with casing | |
US7137454B2 (en) | Apparatus for facilitating the connection of tubulars using a top drive | |
US6032744A (en) | Universal pipe and tubing injection apparatus and method | |
US7509722B2 (en) | Positioning and spinning device | |
US20120175130A1 (en) | Apparatus and methods for facilitating the connection of tubulars using a top drive | |
US20070051519A1 (en) | apparatus for connecting tubulars using a top drive | |
CA2904632C (en) | Systems and methods for tubular engagement and manipulation | |
CA2714327C (en) | Method and apparatus for drilling with casing | |
CA2517993C (en) | Method and apparatus for drilling with casing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA CN JP NO US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase |