GB2287731B - Drillstring assembly and torque decoupler therefor - Google Patents

Drillstring assembly and torque decoupler therefor

Info

Publication number
GB2287731B
GB2287731B GB9405236A GB9405236A GB2287731B GB 2287731 B GB2287731 B GB 2287731B GB 9405236 A GB9405236 A GB 9405236A GB 9405236 A GB9405236 A GB 9405236A GB 2287731 B GB2287731 B GB 2287731B
Authority
GB
United Kingdom
Prior art keywords
therefor
drillstring assembly
torque decoupler
decoupler
torque
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 - Fee Related
Application number
GB9405236A
Other versions
GB2287731A (en
GB9405236D0 (en
Inventor
Roger J Tailby
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Equinor ASA
Original Assignee
Den Norske Stats Oljeselskap AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Den Norske Stats Oljeselskap AS filed Critical Den Norske Stats Oljeselskap AS
Priority to GB9405236A priority Critical patent/GB2287731B/en
Publication of GB9405236D0 publication Critical patent/GB9405236D0/en
Publication of GB2287731A publication Critical patent/GB2287731A/en
Application granted granted Critical
Publication of GB2287731B publication Critical patent/GB2287731B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • E21B17/042—Threaded
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
GB9405236A 1994-03-17 1994-03-17 Drillstring assembly and torque decoupler therefor Expired - Fee Related GB2287731B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9405236A GB2287731B (en) 1994-03-17 1994-03-17 Drillstring assembly and torque decoupler therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9405236A GB2287731B (en) 1994-03-17 1994-03-17 Drillstring assembly and torque decoupler therefor

Publications (3)

Publication Number Publication Date
GB9405236D0 GB9405236D0 (en) 1994-04-27
GB2287731A GB2287731A (en) 1995-09-27
GB2287731B true GB2287731B (en) 1997-10-29

Family

ID=10752023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9405236A Expired - Fee Related GB2287731B (en) 1994-03-17 1994-03-17 Drillstring assembly and torque decoupler therefor

Country Status (1)

Country Link
GB (1) GB2287731B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6439618B1 (en) * 1998-05-04 2002-08-27 Weatherford/Lamb, Inc. Coiled tubing connector
GB2378196B (en) * 2001-07-30 2005-09-14 Smith International Downhole release joint
GB2381806A (en) * 2001-11-13 2003-05-14 Ruff Pup Ltd Torque isolation mechanism
GB0507639D0 (en) 2005-04-15 2005-05-25 Caledus Ltd Downhole swivel sub
CN114293913B (en) * 2022-03-11 2022-05-13 西南石油大学 Downhole friction-reducing and resistance-reducing tool and method based on mechanical decoupling

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295535A (en) * 1979-08-20 1981-10-20 Smith International, Inc. In-hole motor drill with locking bit clutch
US4299296A (en) * 1979-07-06 1981-11-10 Smith International, Inc. In-hole motor drill with bit clutch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299296A (en) * 1979-07-06 1981-11-10 Smith International, Inc. In-hole motor drill with bit clutch
US4295535A (en) * 1979-08-20 1981-10-20 Smith International, Inc. In-hole motor drill with locking bit clutch

Also Published As

Publication number Publication date
GB2287731A (en) 1995-09-27
GB9405236D0 (en) 1994-04-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010317