GB2343208B - Pressure equalizing safety valve for subterranean wells - Google Patents
Pressure equalizing safety valve for subterranean wellsInfo
- Publication number
- GB2343208B GB2343208B GB9928372A GB9928372A GB2343208B GB 2343208 B GB2343208 B GB 2343208B GB 9928372 A GB9928372 A GB 9928372A GB 9928372 A GB9928372 A GB 9928372A GB 2343208 B GB2343208 B GB 2343208B
- 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.)
- Expired - Fee Related
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
- E21B34/101—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 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)
- Safety Valves (AREA)
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 GB9928372D0 (en) | 2000-01-26 |
GB2343208A GB2343208A (en) | 2000-05-03 |
GB2343208B true 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6283217B1 (en) | 1998-08-06 | 2001-09-04 | Schlumberger Technology Corp. | Axial equalizing valve |
US6296061B1 (en) | 1998-12-22 | 2001-10-02 | Camco International Inc. | 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 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2267501A1 (en) * | 1974-04-12 | 1975-11-07 | Erap | |
US4161219A (en) * | 1978-02-27 | 1979-07-17 | 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 |
GB2292959A (en) * | 1994-09-09 | 1996-03-13 | Camco Int | Equalizing subsurface safety valve |
US5682921A (en) * | 1996-05-28 | 1997-11-04 | Baker Hughes Incorporated | Undulating transverse interface for curved flapper seal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252197A (en) | 1979-04-05 | 1981-02-24 | Camco, Incorporated | Piston actuated well safety valve |
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 |
-
1998
- 1998-06-10 WO PCT/US1998/012121 patent/WO1998057029A1/en active Application Filing
- 1998-06-10 GB GB9928372A patent/GB2343208B/en not_active Expired - Fee Related
- 1998-06-10 AU AU78361/98A patent/AU7836198A/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2267501A1 (en) * | 1974-04-12 | 1975-11-07 | Erap | |
US4161219A (en) * | 1978-02-27 | 1979-07-17 | Camco, Incorporated | Piston actuated well safety valve |
US4161219B1 (en) * | 1978-02-27 | 1984-02-28 | ||
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 |
GB2292959A (en) * | 1994-09-09 | 1996-03-13 | Camco Int | Equalizing subsurface safety valve |
US5682921A (en) * | 1996-05-28 | 1997-11-04 | Baker Hughes Incorporated | Undulating transverse interface for curved flapper seal |
Non-Patent Citations (2)
Title |
---|
HILL, BHAVSER OTC,no 8199,6-9 May 1996, pages 471-478, XP002076968 Houston * |
MASON: OTC, no.5576, 27 -30 April 1987, pages 217-227 XP002076969 Houston * |
Also Published As
Publication number | Publication date |
---|---|
WO1998057029A1 (en) | 1998-12-17 |
AU7836198A (en) | 1998-12-30 |
GB2343208A (en) | 2000-05-03 |
GB9928372D0 (en) | 2000-01-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110610 |