GB2470876A - Multiple spring subsurface safety valve - Google Patents

Multiple spring subsurface safety valve Download PDF

Info

Publication number
GB2470876A
GB2470876A GB1017081A GB201017081A GB2470876A GB 2470876 A GB2470876 A GB 2470876A GB 1017081 A GB1017081 A GB 1017081A GB 201017081 A GB201017081 A GB 201017081A GB 2470876 A GB2470876 A GB 2470876A
Authority
GB
United Kingdom
Prior art keywords
flow tube
safety valve
subsurface safety
housing
multiple spring
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.)
Withdrawn
Application number
GB1017081A
Other versions
GB201017081D0 (en
Inventor
John E Burris
Troy L Smith
Allen P Carney
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.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes 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 Baker Hughes Inc filed Critical Baker Hughes Inc
Priority claimed from PCT/US2009/037701 external-priority patent/WO2009120581A2/en
Publication of GB201017081D0 publication Critical patent/GB201017081D0/en
Publication of GB2470876A publication Critical patent/GB2470876A/en
Withdrawn legal-status Critical Current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

Abstract

A subsurface safety valve features vertically stacked springs that are each independently supported in the valve housing and each having an opposite end that bears on a shoulder connected to the flow tube. When mounted this way their applied force is additive as they are in effect mounted in parallel between the housing and the flow tube for overcoming hydrostatic pressure in deep set applications that can exceed 20,000 feet. The stacking also allows the cross-sectional area of the flow tube to be maximized for a given housing outside diameter dictated by well conditions.
GB1017081A 2009-03-19 2009-03-19 Multiple spring subsurface safety valve Withdrawn GB2470876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2009/037701 WO2009120581A2 (en) 2008-03-24 2009-03-19 Multiple spring subsurface safety valve

Publications (2)

Publication Number Publication Date
GB201017081D0 GB201017081D0 (en) 2010-11-24
GB2470876A true GB2470876A (en) 2010-12-08

Family

ID=43085939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1017081A Withdrawn GB2470876A (en) 2009-03-19 2009-03-19 Multiple spring subsurface safety valve

Country Status (1)

Country Link
GB (1) GB2470876A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619320A (en) * 1984-03-02 1986-10-28 Memory Metals, Inc. Subsurface well safety valve and control system
US4664195A (en) * 1986-01-31 1987-05-12 Otis Engineering Corporation Safety valve
US4945993A (en) * 1988-05-06 1990-08-07 Otis Engineering Corporation Surface controlled subsurface safety valve
US5411096A (en) * 1992-08-21 1995-05-02 Akkerman; Neil H. Surface controlled, subsurface tubing safety valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619320A (en) * 1984-03-02 1986-10-28 Memory Metals, Inc. Subsurface well safety valve and control system
US4664195A (en) * 1986-01-31 1987-05-12 Otis Engineering Corporation Safety valve
US4945993A (en) * 1988-05-06 1990-08-07 Otis Engineering Corporation Surface controlled subsurface safety valve
US5411096A (en) * 1992-08-21 1995-05-02 Akkerman; Neil H. Surface controlled, subsurface tubing safety valve

Also Published As

Publication number Publication date
GB201017081D0 (en) 2010-11-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)