DE2808818A1 - Drehender blowout-preventer - Google Patents
Drehender blowout-preventerInfo
- Publication number
- DE2808818A1 DE2808818A1 DE19782808818 DE2808818A DE2808818A1 DE 2808818 A1 DE2808818 A1 DE 2808818A1 DE 19782808818 DE19782808818 DE 19782808818 DE 2808818 A DE2808818 A DE 2808818A DE 2808818 A1 DE2808818 A1 DE 2808818A1
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- valve
- piston
- packing seal
- chamber
- 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- Withdrawn
Links
- 238000012856 packing Methods 0.000 claims description 52
- 239000012530 fluid Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000000314 lubricant Substances 0.000 claims description 13
- 238000007667 floating Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 description 7
- 238000005553 drilling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- JZUFKLXOESDKRF-UHFFFAOYSA-N Chlorothiazide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC2=C1NCNS2(=O)=O JZUFKLXOESDKRF-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000228957 Ferula foetida Species 0.000 description 1
- WXOMTJVVIMOXJL-BOBFKVMVSA-A O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)OS(=O)(=O)OC[C@H]1O[C@@H](O[C@]2(COS(=O)(=O)O[Al](O)O)O[C@H](OS(=O)(=O)O[Al](O)O)[C@@H](OS(=O)(=O)O[Al](O)O)[C@@H]2OS(=O)(=O)O[Al](O)O)[C@H](OS(=O)(=O)O[Al](O)O)[C@@H](OS(=O)(=O)O[Al](O)O)[C@@H]1OS(=O)(=O)O[Al](O)O Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)O.O[Al](O)OS(=O)(=O)OC[C@H]1O[C@@H](O[C@]2(COS(=O)(=O)O[Al](O)O)O[C@H](OS(=O)(=O)O[Al](O)O)[C@@H](OS(=O)(=O)O[Al](O)O)[C@@H]2OS(=O)(=O)O[Al](O)O)[C@H](OS(=O)(=O)O[Al](O)O)[C@@H](OS(=O)(=O)O[Al](O)O)[C@@H]1OS(=O)(=O)O[Al](O)O WXOMTJVVIMOXJL-BOBFKVMVSA-A 0.000 description 1
- 101100070542 Podospora anserina het-s gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/08—Wipers; Oil savers
- E21B33/085—Rotatable packing means, e.g. rotating blow-out preventers
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Sealing Devices (AREA)
- Earth Drilling (AREA)
- Safety Valves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/772,355 US4098341A (en) | 1977-02-28 | 1977-02-28 | Rotating blowout preventer apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2808818A1 true DE2808818A1 (de) | 1978-08-31 |
Family
ID=25094791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19782808818 Withdrawn DE2808818A1 (de) | 1977-02-28 | 1978-02-27 | Drehender blowout-preventer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4098341A (enExample) |
| JP (1) | JPS53134704A (enExample) |
| CA (1) | CA1080615A (enExample) |
| DE (1) | DE2808818A1 (enExample) |
| FR (1) | FR2399534A1 (enExample) |
| GB (1) | GB1596601A (enExample) |
Families Citing this family (87)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185837A (en) * | 1978-05-05 | 1980-01-29 | Jerome Greene | Fluid seal with lubricated sealing surfaces |
| US4509405A (en) * | 1979-08-20 | 1985-04-09 | Nl Industries, Inc. | Control valve system for blowout preventers |
| US4349041A (en) * | 1979-08-20 | 1982-09-14 | Nl Industries, Inc. | Control valve system for blowout preventers |
| US4438900A (en) * | 1980-06-05 | 1984-03-27 | Nl Industries, Inc. | Locking mechanism for annular blowout preventer |
| US4432670A (en) * | 1980-10-01 | 1984-02-21 | Armco Inc. | Combination connector and flex joint for underwater tension elements |
| US4340259A (en) * | 1980-11-24 | 1982-07-20 | Green James R | Wear bushing |
| US4378849A (en) * | 1981-02-27 | 1983-04-05 | Wilks Joe A | Blowout preventer with mechanically operated relief valve |
| US4461448A (en) * | 1981-06-25 | 1984-07-24 | Hydril Company | Well blowout preventer, and packing element |
| US4452421A (en) * | 1981-06-25 | 1984-06-05 | Hydril Company | Well blowout preventer, and packing element |
| US4447037A (en) * | 1981-06-25 | 1984-05-08 | Hydril Company | Well blowout preventer, and packing element |
| US4448255A (en) * | 1982-08-17 | 1984-05-15 | Shaffer Donald U | Rotary blowout preventer |
| US4529210A (en) * | 1983-04-01 | 1985-07-16 | Biffle Morris S | Drilling media injection for rotating blowout preventors |
| US4605195A (en) * | 1985-05-01 | 1986-08-12 | Hydril Company | Annular blowout preventer packing unit |
| US4825938A (en) * | 1987-08-03 | 1989-05-02 | Kenneth Davis | Rotating blowout preventor for drilling rig |
| US5178215A (en) * | 1991-07-22 | 1993-01-12 | Folsom Metal Products, Inc. | Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms |
| US5224557A (en) * | 1991-07-22 | 1993-07-06 | Folsom Metal Products, Inc. | Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms |
| US5647444A (en) * | 1992-09-18 | 1997-07-15 | Williams; John R. | Rotating blowout preventor |
| US5662181A (en) * | 1992-09-30 | 1997-09-02 | Williams; John R. | Rotating blowout preventer |
| US5289883A (en) * | 1992-10-21 | 1994-03-01 | Wellcutter Inc. | Well casing-contained blowout preventer |
| US5348107A (en) * | 1993-02-26 | 1994-09-20 | Smith International, Inc. | Pressure balanced inner chamber of a drilling head |
| US5316081A (en) * | 1993-03-08 | 1994-05-31 | Baski Water Instruments | Flow and pressure control packer valve |
| US5361832A (en) * | 1993-06-17 | 1994-11-08 | Drexel Oilfield Services, Inc. | Annular packer and insert |
| US5588491A (en) * | 1995-08-10 | 1996-12-31 | Varco Shaffer, Inc. | Rotating blowout preventer and method |
| US6913092B2 (en) | 1998-03-02 | 2005-07-05 | Weatherford/Lamb, Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
| US6263982B1 (en) | 1998-03-02 | 2001-07-24 | Weatherford Holding U.S., Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
| US6138774A (en) | 1998-03-02 | 2000-10-31 | Weatherford Holding U.S., Inc. | Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
| US6244359B1 (en) | 1998-04-06 | 2001-06-12 | Abb Vetco Gray, Inc. | Subsea diverter and rotating drilling head |
| AU764993B2 (en) | 1999-03-02 | 2003-09-04 | Weatherford Technology Holdings, Llc | Internal riser rotating control head |
| US7159669B2 (en) | 1999-03-02 | 2007-01-09 | Weatherford/Lamb, Inc. | Internal riser rotating control head |
| US6273195B1 (en) | 1999-09-01 | 2001-08-14 | Baski Water Instruments, Inc. | Downhole flow and pressure control valve for wells |
| US6554016B2 (en) | 2000-12-12 | 2003-04-29 | Northland Energy Corporation | Rotating blowout preventer with independent cooling circuits and thrust bearing |
| US7836946B2 (en) | 2002-10-31 | 2010-11-23 | Weatherford/Lamb, Inc. | Rotating control head radial seal protection and leak detection systems |
| US7487837B2 (en) | 2004-11-23 | 2009-02-10 | Weatherford/Lamb, Inc. | Riser rotating control device |
| US7237623B2 (en) | 2003-09-19 | 2007-07-03 | Weatherford/Lamb, Inc. | Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser |
| US7926593B2 (en) | 2004-11-23 | 2011-04-19 | Weatherford/Lamb, Inc. | Rotating control device docking station |
| US8826988B2 (en) | 2004-11-23 | 2014-09-09 | Weatherford/Lamb, Inc. | Latch position indicator system and method |
| US7296628B2 (en) | 2004-11-30 | 2007-11-20 | Mako Rentals, Inc. | Downhole swivel apparatus and method |
| US7469742B2 (en) * | 2005-06-06 | 2008-12-30 | Lance Earl Larsen | Well cap method and apparatus |
| US20070114039A1 (en) * | 2005-11-21 | 2007-05-24 | Tejas Research And Engineering, Lp | Rotatable flange adapter |
| US8579033B1 (en) | 2006-05-08 | 2013-11-12 | Mako Rentals, Inc. | Rotating and reciprocating swivel apparatus and method with threaded end caps |
| EP2016254B1 (en) * | 2006-05-08 | 2017-03-22 | Mako Rentals, Inc. | Downhole swivel apparatus and method |
| US20080023917A1 (en) * | 2006-07-28 | 2008-01-31 | Hydril Company Lp | Seal for blowout preventer with selective debonding |
| US8176933B2 (en) * | 2006-07-28 | 2012-05-15 | Hydril Usa Manufacturing Llc | Annular BOP packing unit |
| NO2176503T3 (enExample) | 2007-08-06 | 2018-03-24 | ||
| US7762320B2 (en) | 2007-08-27 | 2010-07-27 | Williams John R | Heat exchanger system and method of use thereof and well drilling equipment comprising same |
| US7717170B2 (en) | 2007-08-27 | 2010-05-18 | Williams John R | Stripper rubber pot mounting structure and well drilling equipment comprising same |
| US7726416B2 (en) | 2007-08-27 | 2010-06-01 | Theresa J. Williams, legal representative | Bearing assembly retaining apparatus and well drilling equipment comprising same |
| US7635034B2 (en) * | 2007-08-27 | 2009-12-22 | Theresa J. Williams, legal representative | Spring load seal assembly and well drilling equipment comprising same |
| US7559359B2 (en) * | 2007-08-27 | 2009-07-14 | Williams John R | Spring preloaded bearing assembly and well drilling equipment comprising same |
| US7798250B2 (en) * | 2007-08-27 | 2010-09-21 | Theresa J. Williams, legal representative | Bearing assembly inner barrel and well drilling equipment comprising same |
| US7766100B2 (en) | 2007-08-27 | 2010-08-03 | Theresa J. Williams, legal representative | Tapered surface bearing assembly and well drilling equiment comprising same |
| US7789172B2 (en) * | 2007-08-27 | 2010-09-07 | Williams John R | Tapered bearing assembly cover plate and well drilling equipment comprising same |
| US7717169B2 (en) * | 2007-08-27 | 2010-05-18 | Theresa J. Williams, legal representative | Bearing assembly system with integral lubricant distribution and well drilling equipment comprising same |
| US7997345B2 (en) | 2007-10-19 | 2011-08-16 | Weatherford/Lamb, Inc. | Universal marine diverter converter |
| US8844652B2 (en) | 2007-10-23 | 2014-09-30 | Weatherford/Lamb, Inc. | Interlocking low profile rotating control device |
| US8286734B2 (en) | 2007-10-23 | 2012-10-16 | Weatherford/Lamb, Inc. | Low profile rotating control device |
| US7708089B2 (en) * | 2008-02-07 | 2010-05-04 | Theresa J. Williams, legal representative | Breech lock stripper rubber pot mounting structure and well drilling equipment comprising same |
| GB0804306D0 (en) | 2008-03-07 | 2008-04-16 | Petrowell Ltd | Device |
| US7717168B2 (en) * | 2008-04-15 | 2010-05-18 | Theresa J. Williams, legal representative | Reinforced stripper rubber body and method of making same |
| US8403290B2 (en) * | 2008-06-09 | 2013-03-26 | Alberta Petroleum Industries Ltd. | Wiper seal assembly |
| US8322432B2 (en) | 2009-01-15 | 2012-12-04 | Weatherford/Lamb, Inc. | Subsea internal riser rotating control device system and method |
| US9359853B2 (en) | 2009-01-15 | 2016-06-07 | Weatherford Technology Holdings, Llc | Acoustically controlled subsea latching and sealing system and method for an oilfield device |
| US8347983B2 (en) | 2009-07-31 | 2013-01-08 | Weatherford/Lamb, Inc. | Drilling with a high pressure rotating control device |
| AU2010346598B2 (en) * | 2010-02-25 | 2014-01-30 | Halliburton Energy Services, Inc. | Pressure control device with remote orientation relative to a rig |
| US8347982B2 (en) | 2010-04-16 | 2013-01-08 | Weatherford/Lamb, Inc. | System and method for managing heave pressure from a floating rig |
| US9175542B2 (en) | 2010-06-28 | 2015-11-03 | Weatherford/Lamb, Inc. | Lubricating seal for use with a tubular |
| EA201101238A1 (ru) * | 2010-09-28 | 2012-05-30 | Смит Интернэшнл, Инк. | Переходный фланец для поворотного регулирующего устройства |
| US9163473B2 (en) | 2010-11-20 | 2015-10-20 | Halliburton Energy Services, Inc. | Remote operation of a rotating control device bearing clamp and safety latch |
| US8739863B2 (en) | 2010-11-20 | 2014-06-03 | Halliburton Energy Services, Inc. | Remote operation of a rotating control device bearing clamp |
| US9260934B2 (en) | 2010-11-20 | 2016-02-16 | Halliburton Energy Services, Inc. | Remote operation of a rotating control device bearing clamp |
| GB2549210B (en) | 2011-03-23 | 2018-07-25 | Managed Pressure Operations | Blow out preventer |
| DE102011052182B4 (de) * | 2011-07-27 | 2013-02-14 | Aker Wirth Gmbh | Vorrichtung zur Herstellung eines Erdlochs |
| US9022131B2 (en) | 2011-12-22 | 2015-05-05 | National Oilwell Varco, L.P. | Hydrodynamic journal bearing flow control bushing for a rotating control device |
| US10309191B2 (en) | 2012-03-12 | 2019-06-04 | Managed Pressure Operations Pte. Ltd. | Method of and apparatus for drilling a subterranean wellbore |
| GB2501094A (en) | 2012-04-11 | 2013-10-16 | Managed Pressure Operations | Method of handling a gas influx in a riser |
| GB2500188B (en) | 2012-03-12 | 2019-07-17 | Managed Pressure Operations | Blowout preventer assembly |
| WO2014145611A2 (en) * | 2013-03-15 | 2014-09-18 | Weatherford/Lamb, Inc. | Purging fluid circuits in wellbore control devices |
| GB201315216D0 (en) * | 2013-08-27 | 2013-10-09 | Enovate Systems Ltd | Improved annular blow out preventer |
| US9194509B2 (en) * | 2013-09-17 | 2015-11-24 | Ge Oil & Gas Pressure Control Lp | Power boost assist closed device for actuators |
| US9121245B2 (en) * | 2013-11-22 | 2015-09-01 | Zp Interests, Llc | Spherical-annular blowout preventer having a plurality of pistons |
| GB2521373A (en) | 2013-12-17 | 2015-06-24 | Managed Pressure Operations | Apparatus and method for degassing drilling fluid |
| GB2521374A (en) * | 2013-12-17 | 2015-06-24 | Managed Pressure Operations | Drilling system and method of operating a drilling system |
| CN104033119A (zh) * | 2014-06-23 | 2014-09-10 | 平顶山天安煤业股份有限公司 | 防止高承压水顶钻的装置 |
| CA2971085C (en) | 2014-12-17 | 2021-11-30 | Managed Pressure Operations Pte. Ltd. | Pressure containment devices |
| US20160179106A1 (en) * | 2014-12-17 | 2016-06-23 | Hydril USA Distribution LLC | Pressure regulator for fluid hammer reduction |
| GB201602949D0 (en) * | 2016-02-19 | 2016-04-06 | Oil States Ind Uk Ltd | Packer |
| AU2018269351B2 (en) * | 2017-05-17 | 2021-03-11 | Kinetic Pressure Control, Ltd. | Rotary drive actuator for an annular wellbore pressure control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB471732A (en) * | 1935-11-19 | 1937-09-06 | Hydril Co | Improvements in packing heads for wells |
| US3561723A (en) * | 1968-05-07 | 1971-02-09 | Edward T Cugini | Stripping and blow-out preventer device |
| SU523167A1 (ru) * | 1962-12-03 | 1976-07-30 | Азербайджанский Научно-Исследовательский Институт По Бурению Нефтяных И Газовых Скважин | Превентор |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB389513A (en) * | 1931-08-12 | 1933-03-13 | Lewis Mervyn Cecil Seamark | Improvements relating to casing head equipment applicable to oil bore holes |
| US2222082A (en) * | 1938-12-01 | 1940-11-19 | Nat Supply Co | Rotary drilling head |
| US2904357A (en) * | 1958-03-10 | 1959-09-15 | Hydril Co | Rotatable well pressure seal |
| US3533468A (en) * | 1968-12-23 | 1970-10-13 | Hydril Co | Well pressure compensated well blowout preventer |
| US3589667A (en) * | 1969-02-20 | 1971-06-29 | Hydril Co | Combination well blowout preventer |
| US3638721A (en) * | 1969-12-10 | 1972-02-01 | Exxon Production Research Co | Flexible connection for rotating blowout preventer |
| US3741295A (en) * | 1970-07-31 | 1973-06-26 | Hydril Co | Replacement of sub sea blow out preventer packing units |
-
1977
- 1977-02-28 US US05/772,355 patent/US4098341A/en not_active Expired - Lifetime
-
1978
- 1978-02-08 GB GB5093/78A patent/GB1596601A/en not_active Expired
- 1978-02-27 DE DE19782808818 patent/DE2808818A1/de not_active Withdrawn
- 1978-02-27 CA CA297,820A patent/CA1080615A/en not_active Expired
- 1978-02-27 JP JP2195978A patent/JPS53134704A/ja active Granted
- 1978-02-28 FR FR7805752A patent/FR2399534A1/fr active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB471732A (en) * | 1935-11-19 | 1937-09-06 | Hydril Co | Improvements in packing heads for wells |
| SU523167A1 (ru) * | 1962-12-03 | 1976-07-30 | Азербайджанский Научно-Исследовательский Институт По Бурению Нефтяных И Газовых Скважин | Превентор |
| US3561723A (en) * | 1968-05-07 | 1971-02-09 | Edward T Cugini | Stripping and blow-out preventer device |
Also Published As
| Publication number | Publication date |
|---|---|
| US4098341A (en) | 1978-07-04 |
| GB1596601A (en) | 1981-08-26 |
| JPS6113079B2 (enExample) | 1986-04-11 |
| FR2399534A1 (fr) | 1979-03-02 |
| CA1080615A (en) | 1980-07-01 |
| JPS53134704A (en) | 1978-11-24 |
| FR2399534B1 (enExample) | 1983-11-18 |
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