GB9928372D0 - Pressure equalizing safety valve for subterranean wells - Google Patents

Pressure equalizing safety valve for subterranean wells

Info

Publication number
GB9928372D0
GB9928372D0 GBGB9928372.3A GB9928372A GB9928372D0 GB 9928372 D0 GB9928372 D0 GB 9928372D0 GB 9928372 A GB9928372 A GB 9928372A GB 9928372 D0 GB9928372 D0 GB 9928372D0
Authority
GB
United Kingdom
Prior art keywords
safety valve
pressure equalizing
subterranean wells
equalizing safety
subterranean
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.)
Granted
Application number
GBGB9928372.3A
Other versions
GB2343208A (en
GB2343208B (en
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 International Inc
Original Assignee
Camco International 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
Application filed by Camco International Inc filed Critical Camco International Inc
Publication of GB9928372D0 publication Critical patent/GB9928372D0/en
Publication of GB2343208A publication Critical patent/GB2343208A/en
Application granted granted Critical
Publication of GB2343208B publication Critical patent/GB2343208B/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
    • 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
    • E21B34/101—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for equalizing fluid pressure above and below the valve
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05—Flapper valves
GB9928372A 1997-06-10 1998-06-10 Pressure equalizing safety valve for subterranean wells Expired - Fee Related GB2343208B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4917197P 1997-06-10 1997-06-10
PCT/US1998/012121 WO1998057029A1 (en) 1997-06-10 1998-06-10 Pressure equalizing safety valve for subterranean wells

Publications (3)

Publication Number Publication Date
GB9928372D0 true GB9928372D0 (en) 2000-01-26
GB2343208A GB2343208A (en) 2000-05-03
GB2343208B GB2343208B (en) 2002-02-20

Family

ID=21958403

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9928372A Expired - Fee Related GB2343208B (en) 1997-06-10 1998-06-10 Pressure equalizing safety valve for subterranean wells

Country Status (3)

Country Link
AU (1) AU7836198A (en)
GB (1) GB2343208B (en)
WO (1) WO1998057029A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6283217B1 (en) 1998-08-06 2001-09-04 Schlumberger Technology Corp. Axial equalizing valve
GB2345076B (en) * 1998-12-22 2001-06-20 Camco Int Pilot-operated pressure-equalizing mechanism for subsurface valve
AU784461B2 (en) * 2000-12-05 2006-04-06 Baker Hughes Incorporated Equalizing flapper for down hole safety valves
US6848509B2 (en) * 2001-10-22 2005-02-01 Baker Hughes Incorporated Pressure equalizing plunger valve for downhole use
US7204313B2 (en) * 2005-01-07 2007-04-17 Baker Hughes Incorporated Equalizing flapper for high slam rate applications
US9163479B2 (en) * 2007-08-03 2015-10-20 Baker Hughes Incorporated Flapper operating system without a flow tube
US8453729B2 (en) 2009-04-02 2013-06-04 Key Energy Services, Llc Hydraulic setting assembly
US8684096B2 (en) 2009-04-02 2014-04-01 Key Energy Services, Llc Anchor assembly and method of installing anchors
US9303477B2 (en) 2009-04-02 2016-04-05 Michael J. Harris Methods and apparatus for cementing wells
CN105156040B (en) * 2015-07-23 2017-07-25 中国石油天然气集团公司 A kind of drilling bit with square drill rod for preventing splashing of mud

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2267501B1 (en) * 1974-04-12 1980-03-14 Elf Aquitaine
US4161219A (en) * 1978-02-27 1979-07-17 Camco, Incorporated Piston actuated well safety valve
US4252197A (en) 1979-04-05 1981-02-24 Camco, Incorporated Piston actuated well safety valve
US4415036A (en) * 1982-02-22 1983-11-15 Baker Oil Tools, Inc. Pressure equalizing flapper type safety valve for subterranean wells
US4478286A (en) * 1983-02-14 1984-10-23 Baker Oil Tools, Inc. Equalizing valve for subterranean wells
US4660646A (en) 1985-11-27 1987-04-28 Camco, Incorporated Failsafe gas closed safety valve
US4976317A (en) 1989-07-31 1990-12-11 Camco International Inc. Well tool hydrostatic release means
US5310004A (en) 1993-01-13 1994-05-10 Camco International Inc. Fail safe gas bias safety valve
US5503229A (en) * 1994-09-09 1996-04-02 Camco International Inc. Equalizing subsurface safety valve
US5682921A (en) * 1996-05-28 1997-11-04 Baker Hughes Incorporated Undulating transverse interface for curved flapper seal

Also Published As

Publication number Publication date
WO1998057029A1 (en) 1998-12-17
AU7836198A (en) 1998-12-30
GB2343208A (en) 2000-05-03
GB2343208B (en) 2002-02-20

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Legal Events

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

Effective date: 20110610