GB2268771B - Method for retrieving well casings using an internal gripping device - Google Patents

Method for retrieving well casings using an internal gripping device

Info

Publication number
GB2268771B
GB2268771B GB9318243A GB9318243A GB2268771B GB 2268771 B GB2268771 B GB 2268771B GB 9318243 A GB9318243 A GB 9318243A GB 9318243 A GB9318243 A GB 9318243A GB 2268771 B GB2268771 B GB 2268771B
Authority
GB
United Kingdom
Prior art keywords
gripping device
well casings
internal gripping
retrieving well
retrieving
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
Application number
GB9318243A
Other versions
GB9318243D0 (en
GB2268771A (en
Inventor
Hector Mcdonald
Ian Alexander Gillies
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.)
ENTERRA
Pioneer Oil Tools Ltd
Original Assignee
ENTERRA
Pioneer Oil Tools Ltd
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
Priority claimed from GB919104912A external-priority patent/GB9104912D0/en
Application filed by ENTERRA, Pioneer Oil Tools Ltd filed Critical ENTERRA
Priority to GB9318243A priority Critical patent/GB2268771B/en
Publication of GB9318243D0 publication Critical patent/GB9318243D0/en
Publication of GB2268771A publication Critical patent/GB2268771A/en
Application granted granted Critical
Publication of GB2268771B publication Critical patent/GB2268771B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • E21B31/16—Grappling tools, e.g. tongs or grabs combined with cutting or destroying means

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
GB9318243A 1991-03-08 1993-09-02 Method for retrieving well casings using an internal gripping device Expired - Lifetime GB2268771B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9318243A GB2268771B (en) 1991-03-08 1993-09-02 Method for retrieving well casings using an internal gripping device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB919104912A GB9104912D0 (en) 1991-03-08 1991-03-08 Grapples
PCT/GB1992/000408 WO1992015767A1 (en) 1991-03-08 1992-03-09 Method for retrieving well casings using an internal gripping device
GB9318243A GB2268771B (en) 1991-03-08 1993-09-02 Method for retrieving well casings using an internal gripping device

Publications (3)

Publication Number Publication Date
GB9318243D0 GB9318243D0 (en) 1993-11-17
GB2268771A GB2268771A (en) 1994-01-19
GB2268771B true GB2268771B (en) 1995-01-04

Family

ID=26298550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9318243A Expired - Lifetime GB2268771B (en) 1991-03-08 1993-09-02 Method for retrieving well casings using an internal gripping device

Country Status (1)

Country Link
GB (1) GB2268771B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201516452D0 (en) * 2015-09-16 2015-10-28 Telfer George Downhole cutting and pulling tool and method of use

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1458592A (en) * 1974-04-19 1976-12-15 British Gas Corp Pipe extraction apparauts
US4047568A (en) * 1976-04-26 1977-09-13 International Enterprises, Inc. Method and apparatus for cutting and retrieving casing from a well bore

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1458592A (en) * 1974-04-19 1976-12-15 British Gas Corp Pipe extraction apparauts
US4047568A (en) * 1976-04-26 1977-09-13 International Enterprises, Inc. Method and apparatus for cutting and retrieving casing from a well bore

Also Published As

Publication number Publication date
GB9318243D0 (en) 1993-11-17
GB2268771A (en) 1994-01-19

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20120308