WO2005106188A1 - Blowout preventer and method for manipulating a ram block - Google Patents
Blowout preventer and method for manipulating a ram block Download PDFInfo
- Publication number
- WO2005106188A1 WO2005106188A1 PCT/GB2005/050018 GB2005050018W WO2005106188A1 WO 2005106188 A1 WO2005106188 A1 WO 2005106188A1 GB 2005050018 W GB2005050018 W GB 2005050018W WO 2005106188 A1 WO2005106188 A1 WO 2005106188A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ram
- blowout preventer
- ram block
- block
- end plate
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- 210000003660 reticulum Anatomy 0.000 description 47
- 238000005553 drilling Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 241000191291 Abies alba Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 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
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7069—With lock or seal
Definitions
- Blowout preventers are generally used for preventing a sudden rise in pressure in a fluid in a wellbore from escaping the wellbore. A sudden surge in pressure could cause equipment above the well to fail and in a worst- case scenario cause a blowout.
- a blowout preventer located at the top of the wellbore is activated to either: isolate the entire wellbore; or the annulus between a pipe or tool string running therethrough and the wall of the wellbore.
- drilling mud is circulated from the surface through a string of drill pipe running through the wellbore to the drill bit and returns to the surface in an annular passage defined by the string of drill pipe and the wellbore or casing lining the -wellbore. If a sudden rise in pressure in the drilling mud is observed, the blowout preventer is activated to prevent the high pressure drilling mud escaping or damaging equipment at the top of the well. Densifiers are added to the drilling mud and circulated in the closed off well until the pressure of the drilling mud in the wellbore comes under control. The blowout preventer is then opened and drilling continues in a normal manner.
- the prior art discloses a wide variety of blowout preventers.
- Typical blowout preventers have selectively actuatable rams arranged in bonnets disposed on opposite sides of a body which has a bore therethrough which forms a continuation of the wellbore for the passage of pipe strings, tools in pipe strings and wirelines into and out of the wellbore.
- Ram blocks are arranged in the body on the ends of the actuable rams, which comprise seals such that when activated seal at least a portion of the passage.
- the bonnets are movably secured to the body on hinges and/or bolted to facilitate access to the ram blocks for inspection and maintenance.
- the ram blocks may be: pipe ram blocks, which contact, engage, and encompass a pipe or a tool in a pipe string running through the passage in the body of the blowout preventer to seal the annulus between the wellbore and the pipe or tool; or shear ram blocks which shear a pipe or tool in a pipe string running through the body of the blowout preventer to seal the entire wellbore; or blind ram blocks which seals off a wellbore which does not have a string running through the body of the blowout preventer; or wireline blocks, for sealing off the entire wellbore which has wireline running therethrough.
- several blowout preventers are arranged one on top of the other to form a tree.
- the tree of blowout preventers is generally located on top of the wellhead, casing or Christmas tree.
- the blowout preventers in the tree may comprise the above referred to types of rams and may comprise at least one back-up of each.
- rams In the case of pipe rams, there may be several in a tree for sealing around various diameter pipes, coiled tubing or wirelines which may be running through the tree.
- the ram block is releasably secured to the end of the ram actuator.
- a blowout preventer may never be activated, the seals in the ram blocks have to be in perfect condition at all times just in case activation is required.
- the blowout preventers remain in the well for many months or many years.
- Blowout preventers require regular inspection and regular maintenance and ram blocks require regular replacement.
- Prior art systems include a variety of movable bonnets for accessing rams and seals. Blowout preventers are disclosed in many U.S. Patents, including, but not limited to, U.S.
- a blowout preventer with easy access to a ram block in a bonnet and for facilitating easy movement of a ram block to a position at which it can be inspected and/or replaced.
- a blowout preventer comprising a body with a bore therethrough, a ram and a ram block characterised in that the blowout preventer further comprises an apparatus secured to the blowout preventer for selectively engaging and supporting the ram block and moving the ram block with respect to the ram.
- the ram block holding apparatus is manually movable or may be robotic.
- the ram is configured for moving pipe ram blocks or blind rams in position in the bore or may be configured for moving shear ram blocks to shear items in the bore.
- the ram block may be any sort of ram block, including, but not limited to pipe ram blocks, blind ram blocks and shear ram blocks
- the apparatus comprises a ram block holder for supporting the ram block.
- the ram block comprises a groove and the ram block holder comprises a plate sized and configured to be received in the groove to support the ram block.
- the groove is located in the block holder and the ram block comprises a plate suitably sized and configured to be received in the groove.
- the apparatus further comprises a pivoted arm on which the ram block holder is arranged.
- the apparatus further comprises an articulated arm on which the ram block holder is arranged.
- the ram is arranged in a bonnet fixed or integral with an end plate (or door) movable from the body.
- the bonnet comprises wing portions at the rear of the bonnet and rods, which inhibit the bonnet from parting the end plate when the ram is activated.
- the end plate comprises at least one groove and the body comprises at least one groove, the blowout preventer further comprising at least one locking member insertable into an opening formed by the grooves to fix the end plate to the body.
- the locking members are bars or rods and most preferably, have chamfered ends.
- the body has at least one arm extending from the body on which the end plate is slidable, preferably, between a closed, sealed position and a position in which the ram block can be accessed.
- the apparatus is secured to the end plate, preferably to a side end thereof. Another apparatus may be located on the other side of the end plate.
- the present invention also provides a method for inspecting and maintaining a ram block for a blowout preventer, the blowout preventer having a body with a bore therethrough, a ram and a ram block and an apparatus for selectively engaging and supporting the ram block and moving the ram block with respect to the ram, the method comprising the steps of using the apparatus to engage and support the ram block and using the apparatus to move the ram block to a position in which the ram block can be inspected.
- the apparatus is fixed to the blowout preventer and the apparatus comprises an arm on which the ram block is swung from the ram.
- the ram block is slid from engagement with the ram on to the apparatus for selectively engaging and supporting the ram block and moving the ram block with respect to the ram.
- the present invention also provides a blowout preventer comprising a body and a ram arranged in a bonnet fixed or integral with an end plate removable from the body, wherein the end plate comprises at least one groove and the body comprises at least one groove, the blowout preventer further comprising at least one locking member insertable into an opening formed by the grooves to fix the end plate to the body.
- the present invention also provides a blowout preventer comprising a body and a ram arranged in a bonnet fixed or integral with an end plate characterised in that the body has at least one arm projecting therefrom along which the end plate is slidable, preferably, between a closed, sealed position and a position in which the ram block can be accessed.
- Figure 1A is a perspective view of a blowout preventer in accordance with the present invention
- Figure IB is an enlarged perspective view of part of the blowout preventer shown in Figure 1A
- Figure 1C is a partially cut-away perspective view of the blowout preventer shown in Figure 1A
- Figure 2 is a perspective view of hidden parts of the blowout preventer shown in Figure 1A to 1C
- Figures 3A to 3C are perspective views, which show the hidden parts of the blowout preventer shown in Figure
- Figure 4 is a perspective view of part of a blowout preventer in accordance with the present invention with an articulated ram block support
- Figure 5A is a perspective view of a lock bar of a blowout preventer in accordance with the present invention
- Figure 5B is a side view of the lock bar shown in Figure 5A, indicating hidden features in dashed lines
- Figure 5C is a side view of a pair of lock bars used in a blowout preventer in accordance with the present invention, the lock bars oriented in an in use position.
- a blowout preventer is generally identified by reference numeral 10, which has a body 12 with a bore 14 therethrough from top to bottom such that fluid can communicate therethrough. Side outlets 15, for attachment to a supply of drilling mud or other fluids (not shown) .
- a lower flange 13 is provided for releasably connecting the blowout preventer 10 to other apparatus, e.g. in a wellhead installation.
- Connection surface 13b surrounds the circular bore 14 and is provided with holes 13a, threaded or smooth walled, for use in connection to other apparatus such as another blowout preventer, casing, tubing or a riser.
- the blowout preventer 10 has ram apparatuses 20 arranged on opposite sides of the main body 12.
- Each ram apparatus 20 has a ram 21 within a bonnet 24, forming a hydraulically operable piston and cylinder.
- Each ram apparatus 20 has a ram block 30 arranged on the end of the ram 21.
- Each ram block 30 is provided with seals 26.
- the ram block 30 may be a pipe ram block, such as the one shown in the Figures 3A-C for sealing an annulus defined by the main body 12 and a tubular running therethrough, or a blind ram for sealing across the entire bore 14 or a shear ram for shearing through a tubular running through the bore 14 and sealing off the bore 14 or any other type of ram block.
- the ram blocks 30 are provided with a lipped or dovetail groove 33 in the rear face thereof.
- the ram 21 is provided with a plate 27 integral or otherwise fixed to the end of the ram 21 and lying substantially perpendicular to the action of the ram 21.
- the plate 27 and groove 33 are sized such that the ram block 30 is slidable, transversely to the action of the ram 21, on to the plate 27 on the ram 21 to retain the ram block 30.
- the ram blocks 30 can be removed from the ram 21 by sliding the ram block 30 transversely with respect to the direction of actuation of the ram 21 from the plate 27 fixed to the end of the ram 21 when the ram apparatus 21 is moved away from the body 12.
- each housing rams (not shown) and associated actuator apparatuses 20 As shown in Figures 1 and 2 the bonnets 24 are generally cylindrical and house the ram 21.
- Each bonnet 24 has an end plate 25 sized to fit in an opening in the main body 12 defined by an overhanging top plate 12b, an intermediate member 12c and two sides 12d and (not shown) of the body 12.
- the ram 21 is actuable through the end plate 25 to move the ram block 30 into the bore 14.
- the end plate 25 has an upper face 25a and lower face 25b perpendicular to the plane of the end plate 25.
- the upper face 25a and the lower face 25b are provided with a groove 24a and (not shown) along the width of the end plate 25.
- Corresponding groove 12a is provided in the underside of the overhanging top plate 12b and corresponding groove 12e in an upper face 12f of the intermediate member 12c, such that when the end plate 25 is offered up to the main body 12, the groove 24a and corresponding groove 12a forms a longitudinal hole though which a retaining bar 23 is insertable and the groove in the lower face 25b and the groove 12e forms a longitudinal hole though which a retaining bar 23 is insertable.
- the bars 23 are manually removable.
- the end plate 25 and the rest of the ram actuator apparatus 20 is retractable on arms 33.
- Two rails 33 are fixed to the main body 12 and extend substantially perpendicularly therefrom.
- Lugs 34 are provided on the bottom corners of the end plate 25.
- the lugs 34 have holes running through them, such that the end plate 25 and the rest of the ram actuator 20 is retractable from the main body 12 along the rails 33 until the lugs 34 abut end stops 35.
- the lugs 34 also have holes 36 defined through them, inline with the grooves 12d and (not shown) , such that the lock bars 23 are insertable through the holes 36 into the holes defined by the grooves 12d and (not shown) .
- Rods 32 are arranged between the end plate of the bonnet 24 and the rear of the bonnet 24.
- the rear portion of the rods 32 are threaded and the rear of the bonnet 24 is provided with wing portions 29 having holes therein for receiving the rods 32.
- a nut is screwed on to the threaded portion of the rods 32 to retain the rear of the bonnet 24.
- Pivotably connected to a side of the bonnet 24 is a block holder 40, preferably on a side face of the end plate 25.
- the block holder 40 has a bar 42 extending from mount 43 and an arm 41 arranged on the end of the bar 42 substantially perpendicular thereto.
- the movable bar 42 is pivotably connected with a pin 43a about the mount 43 which is secured to the bonnet 24 with bolts 44.
- the mount 43 has upper and lower parts 43b, 43c.
- the arm 41 is aligned with or generally parallel to a side of the body 12 and the bonnet 24.
- Figure 3A the block holder 40 has been pivoted about the mount 43 on pin 43a and the arm 41 has been aligned with a groove 33 of the ram block 30.
- Figure 3B illustrates movement of the ram block 30 away from the main body 12 as the block holder 40 is pivoted away from the main body 12. At this point seals or other parts of the ram block 30 can be inspected and/or replaced.
- the groove 33 is a typical T-bar slot as shown in the drawings.
- an appropriate recess is made in the ram block. As shown in Figure 3C the ram block 30 has been disengaged from the block holder 40 and the block holder
- the groove or recess 33 is "T" shaped. It is within the scope of the present invention for the groove 33 to have any suitable cross-sectional shape, including but not limited to, "L” shaped, inverted “L” shaped, “T” shaped, inverted “T” shaped, or “C” shaped; and for a ram block to have one, two, or more of such recesses with multiple recesses spaced-apart from each other.
- blowout preventers with block holding/manipulation apparatus in accordance with the present invention; including, but not limited to, blowout preventers with shear rams, blind rams, shear blind rams, pipe rams, and multi-rams (double, triple sets) .
- Figure 4 shows part of a blowout preventer 50 in accordance with the present invention, like the blowout preventer 10, Figure 1A, but with a ram block support apparatus 60 connected to a main body 52 instead of to a bonnet 54.
- an apparatus in accordance with the present invention like apparatus 60, to be connected to a bonnet or for an apparatus in accordance with the present invention, like the apparatus 40, to be connected to a main blowout preventer body.
- the apparatus 60 has three bars 61, 62, 63 with the bars 61 and 62 pivotably connected together with a pivotal connection 64 and the bars 62 and 63 pivotably connected together with a pivotal connection 65.
- the bar 61 is pivotably connected to the body 52 with a pivotal connection 66.
- the bar 63 serves as does the arm 41 in the apparatus 40 and is sized and configured for receipt within a slot or recess in a ram block when the bonnet 54 is moved away from the body 52.
- Figures 5A and 5B show one of the removable bars (or "lock bars") 23 of Figure 2.
- the bar 23 has a body 23a, optional tapered ends 23b, and an optional inner opening 23c which may be threaded for mating with a tool to facilitate insulation of and removal of the lock bar or it may have a shape such as a hex shape for receiving a tool end.
- Figure 5C shows another embodiment 23d of a pair of lock bars 23e, each of which is emplaceable in and removal from one of two spaced-apart sides of a bonnet or door.
- the bars 23e may have an opening like the opening 23c, Figure 5B, and/or two tapered ends like the ends 23b. As shown each lock bar 23e has one tapered end 23f.
- the bonnets 24 prefferably connected to the main body 12 in any manner with any structure known in the prior art, such as being arranged on a plate and bolted to the main body or attached to a door which door is hingedly connected to the main body.
- the bars 23 are arranged between the bonnet and the plate and the bonnet and the door respectively.
- the present invention therefore, provides in some, but not in necessarily all, embodiments a blowout preventer with a body with a top, a bottom, and a bore therethrough from the top to the bottom, ram apparatus movable within the body, the ram apparatus including a ram block, and ram block holding apparatus pivotably secured exteriorly to the body, the ram block holding apparatus pivotable for selectively engaging and supporting the ram block and moving the ram block with respect to the body.
- Such a blowout preventer may have one or some, in any possible combination, of the following: the body including at least one bonnet movably secured to the body, the at least one bonnet containing actuator apparatus for moving the ram block, and the ram block holding apparatus pivotably and releasably secured to the at least one bonnet; wherein the ram block has a corresponding opening and the ram block holding apparatus includes a mount connected to the body, a main bar pivotably connected to the mount, an arm secured to or formed integrally with the mount, the arm at an angle to the main body, and the arm sized, and configured for receipt within the corresponding opening of the ram block; wherein the movable ram apparatus has part thereof in a ram actuator housing projecting from the main body and wherein the ram block holding apparatus has a main support body, the ram block holding apparatus positionable so that the ram block holding apparatus main support body is substantially aligned with the ram actuator housing; wherein the ram block holding apparatus is manually movable; at least one lock bar,
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Superstructure Of Vehicle (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Percussive Tools And Related Accessories (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Fluid-Damping Devices (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Fuses (AREA)
- Earth Drilling (AREA)
- Percussion Or Vibration Massage (AREA)
- Massaging Devices (AREA)
- Soil Working Implements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0509813A BRPI0509813B1 (en) | 2004-04-30 | 2005-02-18 | explosion protection and method for handling a striking piston blocker |
EP05708469A EP1745193B1 (en) | 2004-04-30 | 2005-02-18 | Blowout preventer and method for manipulating a ram block |
CA 2565135 CA2565135C (en) | 2004-04-30 | 2005-02-18 | Blowout preventer and method for manipulating a ram block |
NO20065020A NO336931B1 (en) | 2004-04-30 | 2006-11-02 | Blowout protection and method for manipulating a closing head block |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/836,819 US7051989B2 (en) | 2004-04-30 | 2004-04-30 | Blowout preventer and movable ram block support |
US10/836,819 | 2004-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005106188A1 true WO2005106188A1 (en) | 2005-11-10 |
Family
ID=34960653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2005/050018 WO2005106188A1 (en) | 2004-04-30 | 2005-02-18 | Blowout preventer and method for manipulating a ram block |
Country Status (6)
Country | Link |
---|---|
US (2) | US7051989B2 (en) |
EP (1) | EP1745193B1 (en) |
BR (1) | BRPI0509813B1 (en) |
CA (1) | CA2565135C (en) |
NO (1) | NO336931B1 (en) |
WO (1) | WO2005106188A1 (en) |
Cited By (3)
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EP2336484A1 (en) | 2007-04-27 | 2011-06-22 | National Oilwell Varco, L.P. | Blowout Preventer |
WO2013155200A2 (en) * | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer locking door assembly and method of using same |
PL443337A1 (en) * | 2022-12-29 | 2024-07-01 | Exalo Drilling Spółka Akcyjna | Device for unscrewing and twisting the blowout preventer head |
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US7331562B2 (en) * | 2005-11-07 | 2008-02-19 | Varco I/P, Inc. | Blowout preventer with breech assembly |
US8424607B2 (en) * | 2006-04-25 | 2013-04-23 | National Oilwell Varco, L.P. | System and method for severing a tubular |
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US7367396B2 (en) * | 2006-04-25 | 2008-05-06 | Varco I/P, Inc. | Blowout preventers and methods of use |
US8028755B2 (en) * | 2007-12-14 | 2011-10-04 | Clearwater International Llc | Quick lock wireline valve/blow-out preventor and methods for making and using same |
US8844898B2 (en) | 2009-03-31 | 2014-09-30 | National Oilwell Varco, L.P. | Blowout preventer with ram socketing |
US8720476B2 (en) * | 2009-08-05 | 2014-05-13 | National Oilwell Varco, L.P. | Portable ram block changer |
CA2711654C (en) * | 2009-08-10 | 2017-09-12 | Dean Foote | Blowout preventer with lock |
US8479825B2 (en) * | 2009-09-03 | 2013-07-09 | Hydril Usa Manufacturing Llc | Crane device and method |
US8225857B2 (en) * | 2009-11-25 | 2012-07-24 | Hydril Usa Manufacturing Llc | Breech lock mechanisms for blowout preventer and method |
CN102985637B (en) | 2010-05-28 | 2015-11-25 | 国民油井华高有限合伙公司 | For cutting off the method for the pipe fitting of well |
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GB201011068D0 (en) * | 2010-07-01 | 2010-08-18 | Enovate Systems Ltd | Wellbore control device |
US9428994B2 (en) | 2010-07-01 | 2016-08-30 | National Oilwell Varco, L.P. | Blowout preventer monitor with trigger sensor and method of using same |
US8540017B2 (en) | 2010-07-19 | 2013-09-24 | National Oilwell Varco, L.P. | Method and system for sealing a wellbore |
US8544538B2 (en) | 2010-07-19 | 2013-10-01 | National Oilwell Varco, L.P. | System and method for sealing a wellbore |
WO2012037173A2 (en) | 2010-09-14 | 2012-03-22 | National Oilwell Varco, L.P. | Blowout preventer ram assembly and method of using same |
US8807219B2 (en) | 2010-09-29 | 2014-08-19 | National Oilwell Varco, L.P. | Blowout preventer blade assembly and method of using same |
US9045961B2 (en) | 2011-01-31 | 2015-06-02 | National Oilwell Varco, L.P. | Blowout preventer seal and method of using same |
US8978751B2 (en) | 2011-03-09 | 2015-03-17 | National Oilwell Varco, L.P. | Method and apparatus for sealing a wellbore |
US9175541B2 (en) | 2012-04-10 | 2015-11-03 | National Oilwell Varco, L.P. | Blowout preventer seal assembly and method of using same |
CA2868526C (en) | 2012-04-10 | 2017-03-07 | National Oilwell Varco, L.P. | Blowout preventer with locking ram assembly and method of using same |
KR101717870B1 (en) | 2013-02-21 | 2017-03-17 | 내셔널 오일웰 바르코 엘.피. | Blowout preventer monitoring system and method of using same |
US9238950B2 (en) | 2014-01-10 | 2016-01-19 | National Oilwell Varco, L.P. | Blowout preventer with packer assembly and method of using same |
US9869149B2 (en) | 2014-09-29 | 2018-01-16 | Saudi Arabian Oil Company | Scissor-mechanism closing rams of blow out preventors |
US10655419B2 (en) | 2014-09-29 | 2020-05-19 | Saudi Arabian Oil Company | Vehicle mounted blowout preventor equipment |
US10370926B2 (en) | 2014-09-29 | 2019-08-06 | Saudi Arabian Oil Company | Apparatus and method to contain flange, pipe and valve leaks |
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US11725471B2 (en) * | 2021-07-28 | 2023-08-15 | Benton Frederick Baugh | Method for retaining blowout preventer actuator bodies |
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US11982159B2 (en) | 2022-05-06 | 2024-05-14 | Saudi Arabian Oil Company | Wellbore protector ram |
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-
2004
- 2004-04-30 US US10/836,819 patent/US7051989B2/en not_active Expired - Lifetime
- 2004-10-26 US US10/974,012 patent/US7044430B2/en not_active Expired - Lifetime
-
2005
- 2005-02-18 BR BRPI0509813A patent/BRPI0509813B1/en active IP Right Grant
- 2005-02-18 CA CA 2565135 patent/CA2565135C/en not_active Expired - Fee Related
- 2005-02-18 WO PCT/GB2005/050018 patent/WO2005106188A1/en active IP Right Grant
- 2005-02-18 EP EP05708469A patent/EP1745193B1/en active Active
-
2006
- 2006-11-02 NO NO20065020A patent/NO336931B1/en unknown
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2336484A1 (en) | 2007-04-27 | 2011-06-22 | National Oilwell Varco, L.P. | Blowout Preventer |
WO2013155200A2 (en) * | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer locking door assembly and method of using same |
WO2013155200A3 (en) * | 2012-04-10 | 2014-07-31 | National Oilwell Varco, L.P. | Blowout preventer locking door assembly and method of using same |
CN104285030A (en) * | 2012-04-10 | 2015-01-14 | 国民油井华高公司 | Blowout preventer locking door assembly and method of using same |
US9169712B2 (en) | 2012-04-10 | 2015-10-27 | National Oilwell Varco, L.P. | Blowout preventer locking door assembly and method of using same |
PL443337A1 (en) * | 2022-12-29 | 2024-07-01 | Exalo Drilling Spółka Akcyjna | Device for unscrewing and twisting the blowout preventer head |
Also Published As
Publication number | Publication date |
---|---|
NO20065020L (en) | 2007-01-18 |
EP1745193A1 (en) | 2007-01-24 |
CA2565135A1 (en) | 2005-11-10 |
BRPI0509813B1 (en) | 2016-07-19 |
BRPI0509813A (en) | 2007-10-09 |
US7044430B2 (en) | 2006-05-16 |
EP1745193B1 (en) | 2008-06-25 |
NO336931B1 (en) | 2015-11-30 |
CA2565135C (en) | 2008-09-23 |
US20050242309A1 (en) | 2005-11-03 |
US20050242307A1 (en) | 2005-11-03 |
US7051989B2 (en) | 2006-05-30 |
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