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GB2223781B - Large bore retrievable well safety valve - Google Patents

Large bore retrievable well safety valve

Info

Publication number
GB2223781B
GB2223781B GB8919520A GB8919520A GB2223781B GB 2223781 B GB2223781 B GB 2223781B GB 8919520 A GB8919520 A GB 8919520A GB 8919520 A GB8919520 A GB 8919520A GB 2223781 B GB2223781 B GB 2223781B
Authority
GB
United Kingdom
Prior art keywords
safety valve
large bore
well safety
retrievable well
bore retrievable
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
GB8919520A
Other versions
GB8919520D0 (en
GB2223781A (en
Inventor
Ronald Earl Pringle
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.)
Camco Inc
Original Assignee
Camco Inc
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 US07/255,818 external-priority patent/US4854387A/en
Application filed by Camco Inc filed Critical Camco Inc
Publication of GB8919520D0 publication Critical patent/GB8919520D0/en
Publication of GB2223781A publication Critical patent/GB2223781A/en
Application granted granted Critical
Publication of GB2223781B publication Critical patent/GB2223781B/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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • E21B34/105—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole retrievable, e.g. wire line retrievable, i.e. with an element which can be landed into a landing-nipple provided with a passage for control fluid
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05—Flapper valves

Landscapes

  • 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)
  • Lift Valve (AREA)
GB8919520A 1988-10-11 1989-08-29 Large bore retrievable well safety valve Expired - Lifetime GB2223781B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/255,818 US4854387A (en) 1988-10-11 1988-10-11 Large bore retrievable well safety valve
GB8910720A GB2223779B (en) 1988-10-11 1989-05-10 Large bore retrievable well safety valve

Publications (3)

Publication Number Publication Date
GB8919520D0 GB8919520D0 (en) 1989-10-11
GB2223781A GB2223781A (en) 1990-04-18
GB2223781B true GB2223781B (en) 1992-06-10

Family

ID=26295336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8919520A Expired - Lifetime GB2223781B (en) 1988-10-11 1989-08-29 Large bore retrievable well safety valve

Country Status (1)

Country Link
GB (1) GB2223781B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309495B4 (en) 2003-02-25 2006-02-16 Schott Ag Aluminosilicate glass and its use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1475929A (en) * 1973-06-29 1977-06-10 Schlumberger Technology Corp Subsurface safety valve apparatus
GB1476581A (en) * 1974-02-06 1977-06-16 Aquitaine Petrole Hydraulic safety valve for a well
GB2036133A (en) * 1978-11-13 1980-06-25 Otis Eng Corp Surface controlled subsurface safety valve
GB2060029A (en) * 1979-09-13 1981-04-29 Otis Eng Corp Surface controlled subsurface safety valve
GB2119831A (en) * 1982-05-07 1983-11-23 Otis Eng Co Downhole safety systems for use while servicing wells

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1475929A (en) * 1973-06-29 1977-06-10 Schlumberger Technology Corp Subsurface safety valve apparatus
GB1476581A (en) * 1974-02-06 1977-06-16 Aquitaine Petrole Hydraulic safety valve for a well
GB2036133A (en) * 1978-11-13 1980-06-25 Otis Eng Corp Surface controlled subsurface safety valve
GB2060029A (en) * 1979-09-13 1981-04-29 Otis Eng Corp Surface controlled subsurface safety valve
GB2119831A (en) * 1982-05-07 1983-11-23 Otis Eng Co Downhole safety systems for use while servicing wells

Also Published As

Publication number Publication date
GB8919520D0 (en) 1989-10-11
GB2223781A (en) 1990-04-18

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Legal Events

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

Effective date: 19930829