AU7836198A - Pressure equalizing safety valve for subterranean wells - Google Patents

Pressure equalizing safety valve for subterranean wells

Info

Publication number
AU7836198A
AU7836198A AU78361/98A AU7836198A AU7836198A AU 7836198 A AU7836198 A AU 7836198A AU 78361/98 A AU78361/98 A AU 78361/98A AU 7836198 A AU7836198 A AU 7836198A AU 7836198 A AU7836198 A AU 7836198A
Authority
AU
Australia
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.)
Abandoned
Application number
AU78361/98A
Inventor
Thomas G. Hill Jr.
Dwayne E. May
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 AU7836198A publication Critical patent/AU7836198A/en
Abandoned legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • E21B34/10Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • E21B34/101Valve 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05Flapper valves
AU78361/98A 1997-06-10 1998-06-10 Pressure equalizing safety valve for subterranean wells Abandoned AU7836198A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US4917197P 1997-06-10 1997-06-10
US06049171 1997-06-10
PCT/US1998/012121 WO1998057029A1 (en) 1997-06-10 1998-06-10 Pressure equalizing safety valve for subterranean wells

Publications (1)

Publication Number Publication Date
AU7836198A true AU7836198A (en) 1998-12-30

Family

ID=21958403

Family Applications (1)

Application Number Title Priority Date Filing Date
AU78361/98A Abandoned AU7836198A (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
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
US8453729B2 (en) 2009-04-02 2013-06-04 Key Energy Services, Llc Hydraulic setting assembly
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
GB2343208B (en) 2002-02-20
WO1998057029A1 (en) 1998-12-17
GB2343208A (en) 2000-05-03
GB9928372D0 (en) 2000-01-26

Similar Documents

Publication Publication Date Title
AU7712998A (en) Pressure equalizing safety valve for subterranean wells
AU9360698A (en) Downhole valve
GB2292959B (en) Equalizing subsurface safety valve
GB2327445B (en) Fluid pressure operable downhole tool
AU6621696A (en) Downhole valve
GB2330598B (en) Computer controlled downhole safety valve system
EP0681088A3 (en) Annulus pressure responsive downhole tool.
AU5001299A (en) Subsea wellbore drilling system for reducing bottom hole pressure
AU8348898A (en) Downhole tubing
AU4512396A (en) Filter for subterranean wells
GB9801377D0 (en) Downhole valve
AU9214098A (en) Production fluid control device for oil/gas wells
GB2358420B (en) Eccentric subsurface safety valve
AU693667B2 (en) Hydraulic coupling with pressure equalizing valve
AU3156497A (en) Subsurface safety valve actuation pressure amplifier
EP0622521A3 (en) Combination packer/safety valve assembly for gas storage wells.
AU5391599A (en) Axial pressure equalizing valve for a well safety valve
AU3534997A (en) Downhole two-way check valve
EP1144794A3 (en) Control system for the workover of oil wells
GB9520680D0 (en) Subsurface safety valve
EG22116A (en) Downhole safety valve
AU1090499A (en) Equalizing subsurface safety valve with injection system
AU7836198A (en) Pressure equalizing safety valve for subterranean wells
AU5107799A (en) Pressure reducing valve
AU7946898A (en) Arrangement for underground stop valve

Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase