EP2971465A2 - Gate valve assembly comprising a sealing assembly - Google Patents
Gate valve assembly comprising a sealing assemblyInfo
- Publication number
- EP2971465A2 EP2971465A2 EP14715813.3A EP14715813A EP2971465A2 EP 2971465 A2 EP2971465 A2 EP 2971465A2 EP 14715813 A EP14715813 A EP 14715813A EP 2971465 A2 EP2971465 A2 EP 2971465A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- gate
- bore
- seal
- assembly
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 124
- 230000004913 activation Effects 0.000 claims abstract description 47
- 238000010008 shearing Methods 0.000 claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000012190 activator Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/08—Cutting or deforming pipes to control fluid flow
-
- 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
-
- 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
- E21B33/063—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams for shearing drill pipes
Definitions
- the invention concerns a gate valve assembly for shearing an elongated member and controlling a fluid flow through a through bore of the gate valve assembly, as well as a method for shearing an elongated member arranged in a through bore of a gate valve arrangement and closing the through bore.
- An elongated member as used in the application described herein includes well related tubular formed elongated members such as a tubing, coiled tubing, drill pipes used in work over, drilling, completion, production or intervention operations.
- the elongated member may also be a wire line or the actual tools to be used when carrying out well related operations.
- BOP Blow Out Preventer
- LRP lower riser package
- BOP arrangements normally have a combined operation mode where cutting the tubing or the wire employed in the well first takes place with one element, for instance a ram arrangement, and thereafter closing the well to ensure a sealed closure to avoid fluid leakage of well fluid with another element in the BOP stack.
- a cutting gate valve arrangement may be used, wherein cutting devices for the cutting of a tubing or a wire line may be included in the gate valve arrangement for shearing of the tubing/wire line prior to closing and sealing the well bore.
- a gate valve arrangement may be provided in various ways.
- the arrangement may include one gate valve or plural gate valves. Further the gate valve may comprise a single gate element or plural gate elements for closing the gate valve.
- the cutting tool of the gate valve is formed at a front edge of the movable gate element of the gate valve, thereby the closing of the gate valve follows after the cutting of the tube has taken place.
- this solution it is necessary to make sure that the actual cutting is to be carried out properly and to ensure that the cut parts of the tubing are properly separated and removed from the closing area of the gate valve before the closing of the gate valve takes place. If not, there is a risk that the cut parts of the tubular or wire line will be stuck during the closing of the gate element, in which case there is no proper closing of the gate valve and no satisfactory closing of the well.
- U.S. Patent No. 6,601,650 discloses a valve assembly with gate valves each arranged with a cutting edge at a front portion of the gate element. This publication describes the arrangement of providing the area close to the gate valve opening with inclined surfaces for moving the sheared pipe parts away from the gate valve before closing the gate valve.
- U.S. Patent No. 8,353,338 shows two gate valves each with a moveable gate element provided with a cutting edge.
- the two gate valves are arranged at each side of the pipe to be sheared and positioned displaced relative to each other as seen in the axial direction of the pipe.
- An objective of the invention is to provide a gate valve arrangement which obtains an efficient shearing of the elongated member in order to make sure that the gate valve is properly closed for closing and sealing of the well bore.
- a further objective is to ensure that the cutting process is properly completed before the closing and sealing of the gate valve arrangement is carried out.
- Another objective of the invention is to provide a gate valve arrangement with a compact construction, reliable working principles and a simple operation. It is desirable to provide a gate valve arrangement which ensures that the cutting operation has been carried out efficiently before the closing of the gate valve is conducted in order to avoid the problems as described above.
- Another objective is to ensure the integrity of the sealing function of the gate valve.
- the invention concerns a gate valve assembly for shearing an elongated member and controlling a fluid flow through a through bore of the gate valve assembly.
- the through bore is adapted for fluid communication with a well bore and is configured for receiving an elongated member.
- the gate valve assembly comprises at least one gate element movably arranged in a direction transverse to the through bore, wherein the gate element is provided with a cutting portion for shearing the elongated member in the through bore. Further, the gate valve assembly is provided with first and second seal seats arranged for sealing the at least one gate element.
- the gate valve assembly further comprises a seal assembly provided with at least one sealing surface for sealing with at least one of the first and second seal seats.
- the seal assembly has activation means providing additional sealing force in the engagement between the sealing surface of the seal assembly and at least one of the first and second seal seats.
- the seal assembly is arranged in a portion of the gate element which is located outside the through bore in an open position of the gate element, and the seal assembly is arranged displaceably in the transverse direction into a sealing position when the gate element is in a closed position.
- the sealing activation means has an activation mode arranged to provide additional sealing force to the engagement between the at least one sealing surface of the seal assembly and at least one of the first and second seal seats.
- the seal assembly is arranged
- the seal assembly may be arranged to follow the movement of the gate element, to displace the seal assembly into sealing position when the gate element is in the closed position.
- the seal assembly may be arranged in a recess in the gate element.
- the seal assembly may follow the movement of the gate element and displace the seal assembly into sealing position when moving the gate element into the closed position. The movement of the gate element may thereby position the seal assembly in a position where the sealing activation means may be activated for providing additional sealing force between the at least one sealing surface of the seal assembly and at least one of the first and second seal seats.
- the seal assembly may be may arranged for displacement between an initial position in a transverse bore outside the through bore and the sealing position in the through bore.
- the recess for arrangement of the seal assembly may have various configurations.
- the recess may be arranged for accommodation of the seal assembly in the initial position, positioning the at least one sealing surface essentially in line with one of the surfaces of the gate element facing the first or second seal seats.
- the recess may be arranged for accommodation of the seal assembly in the initial position, positioning one sealing surface essentially in line with one surface of the gate element facing the first seal seat and the other sealing surface in line with the other surface facing the second seal seat.
- the gate valve assembly is configured for a smooth closing of the gate element.
- the seal assembly may in addition to the activation mode have an initial mode.
- the seal assembly in the initial mode may be arranged so that no additional sealing force is provided.
- the seal assembly may be provided by control means arranged for shifting the seal assembly between the initial mode and the activation mode.
- the seal assembly may thus be configured so that the control means controls the shifting into the activation mode when the seal assembly is in sealing position, and thus provides additional sealing force in engagement with the at least one of the sealing surface of the seal assembly and at least one of the first and second seal seats.
- At least one of the first and second seal seats may be arranged as sealing activator means causing the activation mode of the seal assembly.
- the seal assembly in contact with at least one of the seal seats causes the seal assembly to shift into the activation mode, thereby providing additional sealing force in engagement with the at least one of the sealing surface of the seal assembly and at least one of the first and second seal seats.
- the at least one of the first and second seal seats may be provided as sealing activator means in addition or as an alternative to the use of control means to control the shifting between the initial mode and the activation mode.
- the sealing activation means may comprise compressible means, for instance elastic compressible means.
- the compressible means In the initial mode of the seal assembly, the compressible means may be arranged in a compressed state, and in the activation mode the compressible means may have a releasing state, thus being arranged to provide an additional sealing force to the first and/or second seal seat.
- the sealing activation means comprises a spring element, the spring element may be positioned in a recess in a
- the sealing activation means may comprise any means capable of providing an additional sealing force to the engagement between the at least one sealing surface of the seal assembly and at least one of the first and second seal seats, for instance mechanical structures, mechanical arrangements or fluid activated means.
- the activation means may comprise compressible means.
- the compressible means may be in a compressed state before positioned in the sealing position or the compressible means may be brought into a compressed state in the sealing position, in order to provide additional sealing force to the engagement between the at least one sealing surface of the seal assembly and at least one of the first and second seal seats.
- the axial extension of the seal assembly may correspond to the distance between the first and second seal seat, thereby providing for the insert of the seal assembly between the first and second seal seat.
- the seal assembly may be inserted between the first and second seal seat in an initial mode. The shifting into the activation mode may thus occur as described above by the use of control means.
- the gate valve assembly may comprise two gate elements provided for the shearing of the elongated member.
- the first gate element and the second gate element may have an interconnection position for connection of the first and second gate elements.
- the interconnection may be arranged by suitable locking means.
- the interconnection position of the first and second gate elements may be arranged as a gate element unit movably arranged between the interconnection position and the through bore closing position where the seal assembly is arranged in a sealing position.
- the first gate element and the second gate element may be movably arranged in opposite directions between an initial shearing position and a completed shearing position for the shearing of the elongated member.
- the first gate element may be arranged to first move into an initial shearing position shearing the elongated member from one side, and then the second gate element conducts shearing from the other side, wherein the first and second gate elements are prepared to be
- the gate valve assembly may be provided with release means for removing the seal assembly from the sealing position.
- the invention also comprises a method for shearing an elongated member arranged in a through bore of a gate valve arrangement and for closing the through bore.
- the through bore is adapted for fluid communication with a well bore.
- An elongated member is arranged in the through bore and the method comprises the following steps: moving at least one gate element in contact with first and second seal seats in a direction transverse to the through bore and into the through bore for the shearing of the elongated member; and closing the through bore by moving at least one gate element arranged with a seal assembly provided with at least one sealing surface for sealing with at least one of the first and second seal seats, thereby moving the seal assembly in the transverse direction and causing an activation of sealing activation means which are arranged in the seal assembly for providing additional sealing force to the engagement between the at least one sealing surface of the seal assembly and at least one of the first and second seal seats.
- the method comprises the following steps:
- first and second gate elements moving the interconnected first and second gate elements, wherein the first or the second gate element is arranged with the seal assembly having at least one sealing surface for sealing with at least one of the first and second seal seats, thereby moving the seal assembly in the transverse direction and causing an activation of the sealing activation means of the seal assembly to provide additional sealing force to the engagement between the sealing surfaces of the seal assembly and the first and second seals.
- Figure 1 is a side section view of a first embodiment of the gate valve arrangement of the present invention.
- Figure 1 shows a gate valve assembly 1 comprising a first gate element 2 arranged to be moved in a direction transverse to a through bore 4 by a first actuator 3.
- a second gate element 5 is provided with a seal assembly 6 in a recess 7 and is arranged to be moved in a direction transverse to the through bore 4 by a second actuator 8.
- the gate elements 2 and 5 are arranged to move in opposite directions and each is provided with a cutting portion 9, which in figure 1 is visible only on the second gate element 5.
- the first gate element 2 is moved into the through bore 4 and starts shearing until the gate element reaches a shearing position at the centeriine C.
- the second gate element 5 then starts the shearing from the opposite side of the elongated member by moving the second gate element 5 towards the first gate element 2 in order to complete the shearing process.
- the first and second gate elements 2, 5 are configured to interconnect to each other after completing the shearing of the elongated member, and suitable locking means are provided in order to lock the gate elements together.
- the interconnected gate elements 2, 5 then move the seal assembly 6 in the transverse direction into a sealing position. This displacement of the seal assembly 6 is illustrated in figure 1 by lines B and C. Line B coincides with line C when the seal assembly 6 is displaced into the sealing position.
- the seal assembly 6 has seal surfaces such as a first sealing surface 10 to be arranged in sealing engagement with the first seal seat 12, and a second sealing surface 11 to be arranged in sealing engagement with the second seal seat 13.
- the seal assembly 6 is also provided with sealing activation means 15 arranged to provide an additional sealing force in engagement with the first and second seal seats 12, 13.
- sealing activation means 15 is shown as compressible means having an initial mode in which the compressible means is in a compressed state in an initial position outside the through bore 4 indicated by line B.
- the seal assembly 6 When moving the interconnected gate elements 2 and 5 and thereby displacing the seal assembly 6 into a position where line B coincides with line C, the seal assembly is arranged in the sealing position and the sealing activation means 15 is activated into a releasing mode to provide an additional sealing force between the seal assembly 6 and the first and second seal seats 12, 13.
- This activation of the sealing activation means 15 in order to achieve additional sealing may be provided in various ways.
- the seal assembly 6 may be provided with control means arranged for shifting the seal assembly between the initial mode and the activation mode. The control means may be provided so that the sealing activation means 15 is held in the compressed state before being placed into sealing position between the seal seats 12, 13.
- the control means may be provided by devices arranged internally in the seal element to make sure the seal assembly is held in the compressed state until being arranged in the sealing position, where line B coincides with line C.
- the sealing activation means 15 is brought into activation mode, for instance by the control means.
- the seal assembly 6 With the activation means 15 being provided by compressible elastic means such as spring means, the seal assembly 6 will then be displaced into the sealing position in a preloaded condition and brought into a releasing state providing additional sealing force between the seal seats 12, 13 and the seal surfaces 10, 11 of the seal assembly 6.
- the seal seats 12, 13 and/or the seal assembly may be provided with sealing activator means for causing the activation of the activation means in the sealing.
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)
- Sliding Valves (AREA)
- Details Of Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361793698P | 2013-03-15 | 2013-03-15 | |
PCT/US2014/029628 WO2014144994A2 (en) | 2013-03-15 | 2014-03-14 | Gate valve assembly comprising a sealing assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2971465A2 true EP2971465A2 (en) | 2016-01-20 |
EP2971465B1 EP2971465B1 (en) | 2017-11-01 |
Family
ID=52016284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14715813.3A Active EP2971465B1 (en) | 2013-03-15 | 2014-03-14 | Gate valve assembly comprising a sealing assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160032677A1 (en) |
EP (1) | EP2971465B1 (en) |
NO (1) | NO2971465T3 (en) |
WO (1) | WO2014144994A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11761285B2 (en) * | 2021-07-28 | 2023-09-19 | Benton Frederick Baugh | Method for controlling pressure in blowout preventer ram seals |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US778591A (en) * | 1902-02-03 | 1904-12-27 | Mahlon E Layne | Valve. |
US3235224A (en) * | 1963-08-27 | 1966-02-15 | Marvin H Grove | Valve seal construction |
US6454015B1 (en) * | 1999-07-15 | 2002-09-24 | Abb Vetco Gray Inc. | Shearing gate valve |
US6601650B2 (en) | 2001-08-09 | 2003-08-05 | Worldwide Oilfield Machine, Inc. | Method and apparatus for replacing BOP with gate valve |
US7243713B2 (en) * | 2004-11-29 | 2007-07-17 | National-Oilwell Dht, L.P. | Shear/seal ram assembly for a ram-type blowout prevention system |
GB0618555D0 (en) | 2006-09-21 | 2006-11-01 | Enovate Systems Ltd | Improved well bore control vlave |
US8567490B2 (en) | 2009-06-19 | 2013-10-29 | National Oilwell Varco, L.P. | Shear seal blowout preventer |
US8544538B2 (en) * | 2010-07-19 | 2013-10-01 | National Oilwell Varco, L.P. | System and method for sealing a wellbore |
-
2014
- 2014-03-14 NO NO14715813A patent/NO2971465T3/no unknown
- 2014-03-14 WO PCT/US2014/029628 patent/WO2014144994A2/en active Application Filing
- 2014-03-14 EP EP14715813.3A patent/EP2971465B1/en active Active
- 2014-03-14 US US14/777,487 patent/US20160032677A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2014144994A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2014144994A3 (en) | 2015-01-22 |
NO2971465T3 (en) | 2018-03-31 |
WO2014144994A2 (en) | 2014-09-18 |
US20160032677A1 (en) | 2016-02-04 |
EP2971465B1 (en) | 2017-11-01 |
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