WO2013033306A1 - Well emergency separation tool for use in separating a tubular element - Google Patents
Well emergency separation tool for use in separating a tubular element Download PDFInfo
- Publication number
- WO2013033306A1 WO2013033306A1 PCT/US2012/053001 US2012053001W WO2013033306A1 WO 2013033306 A1 WO2013033306 A1 WO 2013033306A1 US 2012053001 W US2012053001 W US 2012053001W WO 2013033306 A1 WO2013033306 A1 WO 2013033306A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tubular element
- emergency separation
- separation tool
- explosive material
- well
- Prior art date
Links
- 238000000926 separation method Methods 0.000 title claims description 75
- 239000002360 explosive Substances 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 85
- 238000000034 method Methods 0.000 claims abstract description 48
- 230000004913 activation Effects 0.000 claims abstract description 18
- 230000004044 response Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 23
- 230000035939 shock Effects 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 19
- 239000002800 charge carrier Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000003999 initiator Substances 0.000 description 7
- 238000005474 detonation Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- JZUFKLXOESDKRF-UHFFFAOYSA-N Chlorothiazide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC2=C1NCNS2(=O)=O JZUFKLXOESDKRF-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000013536 elastomeric material Substances 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- YSIBQULRFXITSW-OWOJBTEDSA-N 1,3,5-trinitro-2-[(e)-2-(2,4,6-trinitrophenyl)ethenyl]benzene Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1\C=C\C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O YSIBQULRFXITSW-OWOJBTEDSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 description 2
- 239000000026 Pentaerythritol tetranitrate Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229960004321 pentaerithrityl tetranitrate Drugs 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000013022 venting Methods 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
- 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
- E21B29/12—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 specially adapted for underwater installations
-
- 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
- E21B29/02—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 by explosives or by thermal or chemical means
-
- 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
- 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
-
- 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 is directed towards a method for separating a tubular element, particularly when the tubular element is suspended above a subsea well experiencing an undesired flow of produced fluids.
- U.S. Patent Number 5,253,585 discloses that a main charge of explosive is positioned symmetrically about a passageway-forming tubular member, such as a well pipe assembly.
- the charge is outwardly and radially spaced from the member and is coupled thereto by a dense medium, such as soil, which is adapted to transfer the produced explosive energy to the tubular member in the form of a pressure pulse applied by the medium.
- Initiation charges are supplied at the outer surface of the main charge, to initiate a detonation wave directed at the tubular member.
- a layer of dense medium is provided to confine the non-coupled surface of the charge and retard venting of explosive gases away from the tubular member.
- U.S. Patent Number 7,779,760 discloses a shaped charge assembly that comprises a housing, first shaped charge, a wave shaping relay charge and a second shaped charge located in the housing.
- the assembly is configured such that a first active element formed by initiation of the first shaped charge causes detonation of the wave shaping relay charge, which in turn causes initiation of the second shaped charge to form a second active element.
- the first active element moves beyond a second end of the housing to cause damage of a first kind to an external target and the second active element also moves beyond the second end to cause damage of a second kind to the target.
- Shaped charges are known in the art, and U.S. Patent Number 7,779,760 is one example.
- U.S. Patent Number 7,779,760 is herein incorporated by reference in its entirety.
- U.S. Patent Number 4,602,794 discloses an annular blowout preventer for use on an oil or gas well rig having a lower housing, an upper housing, a resilient sealing means, a vertical bore coaxially positioned through the housing and a vertically acting piston for actuating the sealing means in which the inner surface of the upper housing and the inner surface of the lower housing are concentric spherical surfaces extending to the bore.
- the resilient sealing means includes steel segments extending between the top and bottom of the sealing means and the top and bottom of the sealing means and the steel segments have spherical surfaces coacting with the spherical surfaces on the upper and lower housings.
- the upper and lower housings each include a vertical wall extending downwardly from the spherical surfaces on the upper and lower housing and the vertical moving piston sealingly engages the vertical walls.
- U.S. Patent Number 4,602,794 is herein incorporated by reference in its entirety.
- U.S. Patent Number 7,354,026 discloses a unitary blade seal for a shearing blind ram of a ram-type blowout preventer and includes an elongate member having a generally semicircular cross section with a curved upper surface and a lower surface. The lower surface has a pair of laterally extending sides that taper outwardly and have a metal outer cap bonded thereto. The metal outer caps form an acute angle that engages a complementary groove formed in the upper ram of the shearing blind ram assembly.
- U.S. Patent Number 7,354,026 is herein incorporated by reference in its entirety.
- U.S. Patent Number 5,251,702 discloses a surface controlled, subsurface safety valve in which a force due to control pressure fluid from a first source at the surface for opening the valve is opposed in part by a force due to reference pressure fluid from a second source at the surface, whereby the valve closes in response to a fail condition.
- U.S. Patent Number 5,251 ,702 is herein incorporated by reference in its entirety.
- U.S. Patent Number 6,089,526 discloses a ram type blowout preventor whose rams have variable ram packers for sealing about pipes of different sizes in the bore of the preventor housing.
- Each ram packer includes a body of elastomeric material installed with a slot across the face of a metal ram body slidable with a guideway intersecting the bore of the preventor body.
- First and second sets of metal segments embedded in the body of elastomeric material beneath a top plate embedded in the packer body are so constructed and arranged as to prevent extrusion of the elastomeric material as the packers seal about the different sizes of pipe.
- U.S. Patent Number 6,089,526 is herein incorporated by reference in its entirety.
- One aspect of the invention provides a method of separating a tubular element, comprising providing a tubular element having an inner and an outer surface, a circumference of said outer surface, and a first end and a second end; radially surrounding said tubular element with an explosive shaped charge material, wherein said explosive shaped charge material is capable of generating a high-velocity plasma jet in response to an activation signal, and wherein said explosive material comprises an electrically conductive layer; transmitting said activation signal to said explosive material; generating said high- velocity plasma jet; and separating said tubular element into a first portion comprising said first end and a second portion comprising said second end when said high- velocity plasma jet penetrates said outer surface of said tubular element and exits said inner surface of said tubular element.
- a well emergency separation tool for separating a tubular element, comprising a tubular element having an inner and outer surface, a circumference of said outer surface, a longitudinal axis, and a first and second end; an explosive material, said explosive material radially surrounding said tubular element; a self- contained charge carrier, wherein at least a portion of said explosive material is contained with said charge carrier; and a trigger adapted to send an activation signal to said explosive material.
- a well emergency separation tool for separating a tubular element, comprising a tubular element having an inner and an outer surface, a circumference of said outer surface, and a first end and a second end; an explosive material, said explosive material radially surrounding said tubular element; a ram body, said ram body comprising an outer surface and an inner surface, said outer surface and said inner surface connected by a substantially flat face, wherein said flat face comprises an arcuate recess designed to engage a portion of said circumference of said tubular element, wherein at least a portion of said explosive material is contained with said ram body; and a trigger adapted to send an activation signal to said explosive material.
- Figure 1 is a schematic diagram depicting one embodiment of the well emergency separation tool positioned above a subsea reservoir.
- Figure 2 is a schematic diagram of an embodiment of the internal structure of the well emergency separation tool.
- Figure 3 is a cross- sectional view along the flat face of the ram body of the internal structure of an embodiment of the well emergency separation tool.
- Figure 4 is another view of one possible design of the explosive element contained within one embodiment of the well emergency separation tool.
- Figures 5-7 are schematic diagrams depicting a method of using one embodiment of the well emergency separation tool.
- Figure 8 is a schematic diagram of one embodiment of the well emergency separation tool positioned above a subsea reservoir.
- Figure 9 is a schematic diagram of one embodiment of the internal structure of the well emergency separation tool.
- Figure 10 is a schematic diagram of one embodiment of the charge carrier used in some embodiments of the well emergency separation tool.
- Figure 1 is a schematic diagram of well emergency separation tool 100 positioned about wellsite 102.
- Riser 2 is fluidly connected to surface structure 4.
- Suitable risers 2 are disclosed in co-pending U.S. Provisional Application 61/376,595, filed August 24, 2010, and having attorney docket number TH4088.
- U.S. Provisional Application 61/376,595 is herein incorporated by reference in its entirety.
- Surface structure 4 floats on sea 6.
- Surface structure 4 may be, for example, a spar, a semisub, a TLP, an FPSO, a temporary or permanent storage system, a vessel, another containment apparatus, or a separator that separates components of fluid, such as gas and liquid, etc.
- Suitable surface structures 4 are disclosed in co-pending U.S. Provisional Application 61/376,542, filed August 24, 2010, and having attorney docket number TH4085; co-pending U.S. Provisional Application 61/376,534, filed August 24, 2010, and having attorney docket number TH4086; and co-pending U.S. Provisional Application 61/376,581, filed August 24, 2010, and having attorney docket number TH4087.
- U.S. Provisional Application 61/376,542 filed August 24, 2010, and having attorney docket number TH4085
- riser 2 is fluidly connected to well emergency separation tool 100.
- Well emergency separation tool 100 comprises ram housing 26.
- Ram housing 26 may be a metallic body as are known in the art, such as a standard forged body, provided by Cameron, Vetco-Gray, Patterson, Hydril, etc.
- Ram housing 26 contains a substantially vertical bore extending from riser 2 to flex joint 10. The outer surface of ram housing 26 may be fluidly isolated from sea 6.
- well emergency separation tool 100 is fluidly connected to flex joint 10 by connector element 8.
- Flex joint 10 extends from connector element 8 to blowout preventer (BOP) stack 12.
- Casing 14 is a tubular element fluidly connected to BOP stack 12.
- BOP stack 12 may be located at or above mudline 18.
- BOP stack 12 may be any BOP stack as are known in the art and commercially available, such as those provided by Cameron, Vetco-Gray, Patterson, Hydril, etc. and disclosed, for example, in U.S. Patent Number 7,410,003, herein incorporated by reference in its entirety. Fluid may flow from reservoir 16 through casing 14 towards surface in the direction marked by arrow 20.
- workstring 22 may extend from surface structure 4 to casing 14. Workstring 22 is contained within riser 2 and passes through well emergency separation tool 100, connector element 8, flex joint 10, or BOP stack 12.
- Well emergency separation tool 100 may be installed between riser 2 and BOP stack 12.
- a second well emergency separation tool 100 may be included for redundancy.
- additional well emergency separation tools 100 may be included if various sizes or types of workstring 22 will be utilized. It may be desirable to install several sets of well emergency separation tools 100 to increase flexibility of design.
- Well emergency separation tool 100 may be installed when drilling operations commence and left on the BOP stack until all completion and workover activities are finished. Alternatively, well emergency separation tool 100 may be left on the well indefinitely and may be removed only when the well is decommissioned or when certain portions of well emergency separation tool 100 need to be repaired or replaced.
- Well emergency separation tool 100 is independent of traditional BOP stacks 12.
- Figure 2 is a schematic diagram of the internal structure of ram housing 26.
- Workstring 22 may be a cylindrical element separated into approximately thirty to forty foot long sections called 'joints'.
- Workstring 22 may be a metallic element designed for oilfield use as is known in the art and commercially available from Patterson, Superior, Tuboscope, etc.
- Workstring 22 may be a small diameter workstring for use in well workovers, or workstring 22 may be a large diameter or heavy wall pipe used for drilling operations.
- Workstring 22 may range from about 1" (inch) up to 20" diameters. As seen in Figure 1, workstring 22 passes through ram housing 26 in a substantially vertical manner.
- Ram housing 26 Two opposing ram bodies 202 are contained within ram housing 26.
- Ram housing 26 is a standard ram housing 26 as is known in the art.
- Ram body 202 comprises an outer surface surrounded by ram housing 26 and an inner surface surrounding explosive material 204.
- Ram body 202 may be any standard ram body as is known in the art and available through commercial suppliers such as Cameron, Vetco-Gray, Patterson, Hydril, etc.
- the outer surface and the inner surface may be connected by a substantially flat face 208.
- Flat face 208 contains an arcuate recess designed to engage about one half the circumference of workstring 22.
- Opposing ram bodies 202 have
- Ram body 202 may laterally translate towards or away from workstring 22 within ram housing 26, as shown by arrow 206. Lateral translation of ram body 202 is controlled by movable element 210. Movable element 210 may be a hydraulically activated piston, or may operate through alternative mechanical, hydraulic, etc. methods as are known in the art. The gap between workstring 22 and explosive element 204 may be controlled by the design of the arcuate recesses, flat faces 208, or movable element 210. Ram housing and ram body design are known in the art and Figure 2 merely provides a simplified diagram of one such design.
- Figure 2 should not be taken to limit the present invention, the choice of the ram body design is not critical. Variable bore ram designs are also known in the art and may be used in the present invention, as disclosed in U.S. Patent Number 6,089,526, herein incorporated by reference in its entirety.
- Figure 3 contains a cross-sectional view along flat face 208 of Figure 2.
- Sealing element 302 is fixedly connected to ram body 202 along flat face 208.
- Sealing element 302 may be an elastomeric sealing element, such as rubber, nitrile rubber, hydrogenated nitrile rubber, etc. as is known in the art.
- the inner surface of ram body 202 contains void 304. Void 304 surrounds explosive material 204.
- Flat face 208 contains an arcuate recess designed to engage about one half the circumference of workstring 22.
- movable element 210 is designed such that opposing sealing elements 302 contact and begin to compress.
- sealing elements 302 sealingly isolate explosive material 204 from external environment 306, and any forces in external environment 306 from explosive material 204.
- Explosive material 204 may contain an electrically conductive metallic liner 308, such as copper.
- metallic liner 308 such as copper.
- Figure 4 is another view of explosive material 204 as may be contained within ram body 202.
- the composition of explosive material 204 may be based on High Melting Explosive (HMX), Cyclotrimethylenetrinitramine (RDX), Hexanitrostilbene (HNS),
- HMX High Melting Explosive
- RDX Cyclotrimethylenetrinitramine
- HNS Hexanitrostilbene
- Pentaerythritol tetranitrate PETN
- the composition, amount, or subsequent shape or design of explosive material 204 may be determined for a given application based on pressure, temperature, wall thickness, workstring 22 thickness, etc.
- the shape of explosive material 204 shown in Figure 4 is purely illustrational and should not indicate a required shape.
- Explosive material 204 may be designed such that when two ram bodies 202 are abutted, explosive material 204 radially encompasses a substantial portion of workstring 22 circumference to improve jet cutting characteristics. Shaped charges are known in the art, for example as disclosed in U.S. Patent Number 7,779,760, which is herein incorporated by reference in its entirety. Explosive material 204 may be designed such that the high velocity jet of plasma is directed away from the inner surface of explosive material 204 and towards the outer surface of workstring 22.
- Figures 5-7 contain a schematic diagram of how well emergency separation tool 100 may be used. All figures contain a close-up view of ram housing 26 as shown in Figure 1. Only those items which differ from Figures 1-4 will be discussed herein, remaining features are more fully explained with respect to Figures 1-4.
- ram bodies 202, 202' are retracted away from workstring 22 in ram housing 26. Sealing elements 302, 302' are fixedly connected to ram bodies 202, 202' along flat faces 208.
- Workstring 22 passes through the bore of ram housing 26 in a substantially vertical manner. Workstring 22 is in line with the arcuate recesses of ram bodies 202, 202'.
- Movable elements 210, 210' cause opposing ram bodies 202, 202' to translate laterally inward towards workstring 22, in the direction of arrows 504, 504' .
- Opposing ram bodies 202, 202' may translate laterally inwards at approximately the same speed.
- ram bodies 202, 202' translate toward each other and enclose workstring 22.
- the two sealing elements 302, 302' initially contact.
- sealing elements 302, 302' are compressed and sealingly isolate explosive material 204, 204' .
- Sealing elements 302, 302' may be designed so that proper stand-off between explosive material 204, 204' and workstring 22 is acquired.
- Ram bodies 202, 202' are abutted until the opposing edges of metallic liner 308 on explosive material 204 (shown in Figure 3) contact and form a complete electrical circuit.
- initiator 602 is electrically connected to explosive material 204, 204'.
- the location of initiator 602 in reference to Figure 6 is merely one illustration and should not be taken as limiting.
- Initiator 602 may receive a detonation signal from a remote location and transmit that signal to activate explosive material 204, 204' .
- Initiator 602 may be any device capable of being integrated into well emergency separation tool 100 as is known in the art.
- a plurality of initiators 602 may be included for redundancy, such as 1-5 initiators, for example 2 initiators 602.
- Explosive material 204 may be designed such that a large pressure surge is created.
- a high-velocity jet of plasma will form, penetrate the outer surface of workstring 22, continue penetrating the entire thickness of workstring 22, and exit the inner surface of workstring 22, thereby cutting workstring 22.
- explosive material 204, 204' may radially encompass workstring 22, the full circumference of workstring 22 will be cut, effectively severing workstring 22 into two distinct portions.
- Figure 7 is a schematic diagram of the system after workstring 22 is fully cut.
- well emergency separation tool 100 is fluidly connected to flex joint 10 by connector element 8.
- Flex joint 10 extends from connector element 8 to BOP stack 12.
- Casing 14 is a tubular element fluidly connected to BOP stack 12.
- standard BOP rams may be shut to control the well. This method may be used in the case of uncontrolled flow from reservoir 16 through casing 14. This may include closing the blind rams and/or the blind- shear rams. Once the blind or blind- shear rams have been closed and the flowing fluids have temporarily halted, well emergency separation tool 100, riser 2, and surface structure 4 can be disconnected from BOP stack via connection element 8.
- movable elements 210, 210' may be retracted into ram housing 26 to allow tools to pass through the bore of ram housing 26. Appropriate remedial measures can then begin.
- shock mitigator 24 When explosive material 204 releases explosive energy, a high-velocity jet of plasma forms. In many cases a shock wave is also formed. It may be desired to incorporate a shock mitigator 24 (see Figure 1) into riser 2. Shock mitigator 24 may be a solid barrier, such as a housing, or an energy absorbing material. Introduction of gas into a fluid may have a significant effect in reducing shock loading. Shock mitigator 24 may be a bubble curtain formed when pressurized gas is injected into the fluid contained within riser 2. One such desirable gas may be nitrogen for its inert properties. Introduction of pressurized gas into a fluid has been shown to reduce the effects of fluid shock up to a factor of ten.
- shock mitigator 24 may be activated before explosive material 204 is activated to cut workstring 22.
- shock mitigator 24 is shown above well emergency separation tool 100, shock mitigator 24 may be integrated into well emergency separation tool 100 or located elsewhere in the system as is required for the given well and materials.
- Figure 8 depicts another embodiment of the well emergency separation tool 600 positioned about wellsite 601.
- Riser 602 is fluidly connected to surface structure 604.
- Surface structure 604 floats on sea 606.
- Surface structure 604 may be, for example, a spar, a semisub, a TLP, an FPSO, a temporary or permanent storage system, a vessel, another containment apparatus, or a separator that separates components of fluid, such as gas and liquid, etc.
- Well emergency separation tool 600 comprises containment housing 626.
- Containment housing 626 is designed and constructed to be able to withstand the explosion of the explosive material in the well emergency separation tool. This maintains the integrity of the system and prevents flow from exiting the riser 602.
- Containment housing 626 contains a substantially vertical bore extending from riser 602 to flex joint 610. The outer surface of the containment housing 626 may be fluidly isolated from sea 606.
- Well emergency separation tool 600 is fluidly connected to flex joint 610 by connector element 608. Flex joint 610 extends from connector element 608 to blowout preventer (BOP) stack 612.
- BOP blowout preventer
- Casing 614 is a tubular element fluidly connected to BOP stack 612.
- BOP stack 612 may be located at or above mudline 618.
- BOP stack 612 may be any BOP stack as are known in the art and commercially available, such as those provided by Cameron, Vetco-Gray,
- Fluid may flow from reservoir 616 through casing 614 towards surface in the direction marked by arrow 620.
- workstring 622 may extend from surface structure 604 to casing 614.
- Workstring 622 is contained within riser 2 and passes through well emergency separation tool 600, connector element 608, flex joint 610, or BOP stack 612. It may be desired to have multiple well emergency separation tools 600 installed between riser 602 and BOP stack 612.
- a second well emergency separation tool 600 may be included for redundancy.
- additional well emergency separation tools 600 may be included if various sizes or types of workstring 622 will be utilized. It may be desirable to install several sets of well emergency separation tools 600 to increase flexibility of design.
- Well emergency separation tool 600 may be installed when drilling operations commence and left on the BOP stack until all completion and workover activities are finished. Alternatively, well emergency separation tool 600 may be left on the well indefinitely and may be removed only when the well is decommissioned or when certain portions of well emergency separation tool 600 need to be repaired or replaced.
- Well emergency separation tool 600 is independent of traditional BOP stacks 612.
- Figure 9 provides a schematic view of the internals of one embodiment of the well emergency separation tool 600.
- the containment housing has an outer surface 626, a charge carrier 632 that hold shaped charges 630 in a specific geometric configuration.
- the shaped charges 630 are positioned so that the plasma jet 636 generated by the explosives is directed towards the outer surface of the tubular element 622 in a manner that the tubular element will be separated. More particularly, the shaped charges are positioned at an angle that is not perpendicular to the longitudinal axis of the tubular element.
- Figure 10 depicts one embodiment of a charge carrier 702.
- the charge carrier has a plurality of openings 704 for the placement of shaped charges. As can be seen from the drawing, the openings are angled so that the shaped charges will be positioned in the correct direction.
- This figure depicts a charge carrier with two rows of openings or openings in two geometric planes. The openings can be arranged in three or more rows of openings as necessary to provide a sufficient plasma jet to separate a tubular element.
- tubular elements may extend through the well emergency separation tool, and it is designed to separate different types and sizes of tubular elements.
- the different types of tubular elements are pipe, casing or drill string of varying diameters, drill collars of varying sizes, and any other equipment that is placed in a wellbore.
- a method of separating a tubular element comprising providing a tubular element having an inner and an outer surface, a circumference of said outer surface, a longitudinal axis and a first end and a second end; radially surrounding said tubular element with an explosive material, wherein said explosive material is capable of generating a high-velocity plasma jet in response to an activation signal, and wherein said explosive material comprises an electrically conductive layer; transmitting said activation signal to said explosive material; generating said high-velocity plasma jet; and separating said tubular element into a first portion comprising said first end and a second portion comprising said second end when said high- velocity plasma jet penetrates said outer surface of said tubular element and exits said inner surface of said tubular element.
- the method also includes securing said first end of said tubular element.
- the method also includes completing an electrical circuit along said electrically conductive layer of said explosive material. In some embodiments, the method also includes providing a shock mitigator and activating said shock mitigator before said generating said high- velocity plasma jet step. In some embodiments, the shock mitigator is a bubble curtain formed by injecting an inert gas into a fluid. In some embodiments, the method also includes allowing said second portion of said tubular element to travel away from said first portion. In some embodiments, the tubular element is positioned above a wellsite, wherein said wellsite comprises a well flowing a produced fluid at a first rate and a flow control device connected to said well. In some embodiments, the method also includes closing said flow control device after said second portion of said tubular element has travelled away from said first portion. In some embodiments, the flow control device is a blowout preventer ram.
- the method also includes providing a ram body, wherein at least a portion of said explosive material is contained with said ram body, said ram body having an outer surface and an inner surface, said outer surface and said inner surface connected by a substantially flat face, said flat face having an arcuate recess designed to engage a portion of said circumference of said tubular element and a sealing element fixedly attached to said flat face.
- the method also includes compressing said sealing element.
- the method also includes providing a ram housing, wherein said ram housing comprises a first ram body and a second ram body.
- the method also includes laterally translating said first ram body and said second ram body toward said tubular element, said first ram body radially encompassing a first portion of said circumference of said tubular element, and said second ram body radially encompassing a second portion of said circumference of said tubular element. In some embodiments, the method also includes laterally translating said first ram body and said second ram body away from said tubular element after said separating said tubular element into said first portion and said second portion step.
- the method includes providing a containment housing surrounding the explosive material wherein the containment housing can withstand the generating said high-velocity plasma jet step without being substantially damaged.
- the method includes using explosive material in the form of a linear charge.
- the method includes using explosive material in the form of shaped charges.
- the linear or shaped charges may be any type of charge known to one of ordinary skill in the art.
- the method includes locating the explosive material in a self-contained charge carrier.
- the carrier may be made of any material, but it is preferably made of a composite material.
- the shaped charges may be located in more than one geometric plane perpendicular to the longitudinal axis of the tubular element.
- the shaped charges may be positioned at an angle such that the high- velocity plasma jet contacts the outer surface of the tubular element at an angle that is not perpendicular to the longitudinal axis of the tubular element. In some embodiments, the shaped charges may be positioned at an angle such that the high- velocity plasma jet contacts the outer surface of the tubular element at an angle to the longitudinal axis of the tubular element of from 45 to 89 degrees.
- a well emergency separation tool for separating a tubular element, comprising a tubular element having an inner and an outer surface, a circumference of said outer surface, and a first end and a second end; an explosive material, said explosive material radially surrounding said tubular element; a ram body, said ram body comprising an outer surface and an inner surface, said outer surface and said inner surface connected by a substantially flat face, wherein said flat face comprises an arcuate recess designed to engage a portion of said circumference of said tubular element, wherein at least a portion of said explosive material is contained with said ram body; and a trigger adapted to send an activation signal to said explosive material.
- the tool further comprises a sealing element fixedly attached to said flat face.
- the tool further comprises a first ram body and a second ram body.
- the tool further comprises a ram housing, said ram housing having a thru-bore and an outer surface fluidly isolated from an external environment, wherein said first ram body and said second ram body are contained with said ram housing.
- the tool further comprises a shock mitigator, wherein said shock mitigator is located external to said ram housing.
- the tool further comprises a wellsite, wherein said wellsite comprises a subsea well flowing a produced fluid, a flow control device fluidly connected to said well, and a riser, wherein said well emergency separation tool is fluidly connected between said flow control device and said riser.
- the flow control device is a blowout preventer.
- the tool further comprises a plurality of well emergency separation tools fluidly connected between said flow control device and said riser.
- a well emergency separation tool for separating a tubular element, including: a tubular element having an inner and an outer surface, a circumference of said outer surface, a longitudinal axis, and a first end and a second end; an explosive material, said explosive material radially surrounding said tubular element; a self-contained charge carrier, wherein at least a portion of said explosive material is contained within said charge carrier; and a trigger adapted to send an activation signal to said explosive material.
- the explosive material is in the form of shaped charges.
- the tool includes a containment housing surrounding the explosive material that is sufficient to withstand a high velocity plasma jet generated by the explosive material and the vibrations, and shocks caused by the explosion.
- the charge carrier is made of a composite material.
- the shaped charges in the tool are located in more than one geometric plane perpendicular to the longitudinal axis of the tubular element.
- the shaped charges may be located in more than two geometric planes.
- the shaped charges are positioned at an angle such that a high- velocity plasma jet generated by the shaped charges will be directed towards the outer surface of the tubular element at an angle that is not perpendicular to the longitudinal axis of the tubular element.
- the shaped charges are positioned at an angle such that a high- velocity plasma jet generated by the shaped charges will be directed towards the outer surface of the tubular element at an angle to the longitudinal axis of the tubular element of from 45 to 89 degrees.
- the trigger uses direct hydraulic means to send the activation signal.
- the trigger uses wireless transmission means selected from the group consisting of acoustic, direct sight sonar and electromagnetic transmission to send the activation signal.
Landscapes
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Earth Drilling (AREA)
- Sampling And Sample Adjustment (AREA)
- Automatic Assembly (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Plasma Technology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI2014700375A MY175923A (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
AU2012301910A AU2012301910B2 (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
US14/241,244 US9982500B2 (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
GB1401840.2A GB2509409B (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
BR112014004627-1A BR112014004627B1 (en) | 2011-09-02 | 2012-08-30 | method for separating a tubular element, and, emergency well separation tool |
NO20140347A NO346983B1 (en) | 2011-09-02 | 2012-08-30 | WELL PREPARATION SEPARATION EQUIPMENT AND METHOD FOR SEPARATION OF A TUBULAR ELEMENT |
CN201280042140.4A CN103764946B (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161530558P | 2011-09-02 | 2011-09-02 | |
US61/530,558 | 2011-09-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013033306A1 true WO2013033306A1 (en) | 2013-03-07 |
WO2013033306A9 WO2013033306A9 (en) | 2013-06-13 |
Family
ID=47756853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2012/053001 WO2013033306A1 (en) | 2011-09-02 | 2012-08-30 | Well emergency separation tool for use in separating a tubular element |
Country Status (8)
Country | Link |
---|---|
US (1) | US9982500B2 (en) |
CN (1) | CN103764946B (en) |
AU (1) | AU2012301910B2 (en) |
BR (1) | BR112014004627B1 (en) |
GB (1) | GB2509409B (en) |
MY (1) | MY175923A (en) |
NO (1) | NO346983B1 (en) |
WO (1) | WO2013033306A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015105739A1 (en) * | 2014-01-07 | 2015-07-16 | Shell Oil Company | Severance tool |
WO2015075429A3 (en) * | 2013-11-19 | 2015-11-19 | Spex Services Limited | Improved tool |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201503608D0 (en) * | 2015-03-03 | 2015-04-15 | Spex Services Ltd | Improved tool |
US20180230759A1 (en) | 2015-10-08 | 2018-08-16 | Shell Oil Company | Shock mitigation devices |
DE112015006986T5 (en) | 2015-12-03 | 2018-06-14 | Halliburton Energy Services, Inc. | Pipeline removal system |
AU2019311107A1 (en) * | 2018-07-25 | 2020-10-15 | Owen Oil Tools Lp | Multi-phase, single point, short gun perforation device for oilfield applications |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4323117A (en) * | 1980-04-23 | 1982-04-06 | Laurance Pierce | Method and means for emergency shearing and sealing of well casing |
US4685521A (en) * | 1985-04-17 | 1987-08-11 | Raulins George M | Well apparatus |
US5777257A (en) * | 1997-03-14 | 1998-07-07 | Senior Power Services, Inc., Demex Division | Shaped charge assembly with truncated liner |
US6125928A (en) * | 1996-12-16 | 2000-10-03 | Ab Grundstenen Ab (Metal Patent Whss Ab) | System for controlling and stopping oil drilling fires |
US20100147519A1 (en) * | 2008-12-16 | 2010-06-17 | Schlumberger Technology Corporation | Mitigating perforating gun shock |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3336759A (en) * | 1965-01-04 | 1967-08-22 | Continental Oil Co | Removal of underwater support structures |
US4602794A (en) | 1980-06-05 | 1986-07-29 | Nl Industries, Inc. | Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element |
US5046563A (en) | 1989-11-07 | 1991-09-10 | Jet Research Center, Inc. | Apparatus and method for cutting an object in a well |
US5133419A (en) * | 1991-01-16 | 1992-07-28 | Halliburton Company | Hydraulic shock absorber with nitrogen stabilizer |
GB9109097D0 (en) | 1991-04-26 | 1991-06-12 | Secr Defence Brit | Explosive procedures for capping runaway oil and gas wells |
US5251702A (en) | 1991-07-16 | 1993-10-12 | Ava International Corporation | Surface controlled subsurface safety valve |
US6016753A (en) | 1995-03-10 | 2000-01-25 | The United States Of America As Represented By The Secretary Of The Air Force | Explosive pipe cutting |
US6089526A (en) * | 1997-05-01 | 2000-07-18 | Stewart & Stevenson Services, Inc. | Ram type blowout preventor |
US20020129940A1 (en) * | 2000-12-13 | 2002-09-19 | Wenbo Yang | High temperature explosives for downhole well applications |
US7347930B2 (en) | 2003-10-16 | 2008-03-25 | China Petroleum & Chemical Corporation | Process for cracking hydrocarbon oils |
CN2709641Y (en) * | 2004-07-05 | 2005-07-13 | 大庆石油管理局 | Linear cutter in oil gas well |
US7354026B2 (en) | 2004-08-17 | 2008-04-08 | Cameron International Corporation | Unitary blade seal for a shearing blind ram in a ram type blowout preventer |
WO2006090338A1 (en) | 2005-02-23 | 2006-08-31 | Armaments Corporation Of South Africa Limited | Shaped charge assembly and method of damaging a target |
US7410003B2 (en) | 2005-11-18 | 2008-08-12 | Bj Services Company | Dual purpose blow out preventer |
US7789153B2 (en) * | 2006-10-26 | 2010-09-07 | Alliant Techsystems, Inc. | Methods and apparatuses for electronic time delay and systems including same |
GB2498291B (en) * | 2010-10-29 | 2017-05-17 | Shell Int Research | Well emergency separation tool for use in separating a tubular element |
US8393393B2 (en) * | 2010-12-17 | 2013-03-12 | Halliburton Energy Services, Inc. | Coupler compliance tuning for mitigating shock produced by well perforating |
US8881816B2 (en) * | 2011-04-29 | 2014-11-11 | Halliburton Energy Services, Inc. | Shock load mitigation in a downhole perforation tool assembly |
-
2012
- 2012-08-30 BR BR112014004627-1A patent/BR112014004627B1/en active IP Right Grant
- 2012-08-30 US US14/241,244 patent/US9982500B2/en active Active
- 2012-08-30 NO NO20140347A patent/NO346983B1/en unknown
- 2012-08-30 MY MYPI2014700375A patent/MY175923A/en unknown
- 2012-08-30 AU AU2012301910A patent/AU2012301910B2/en active Active
- 2012-08-30 CN CN201280042140.4A patent/CN103764946B/en active Active
- 2012-08-30 WO PCT/US2012/053001 patent/WO2013033306A1/en active Application Filing
- 2012-08-30 GB GB1401840.2A patent/GB2509409B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4323117A (en) * | 1980-04-23 | 1982-04-06 | Laurance Pierce | Method and means for emergency shearing and sealing of well casing |
US4685521A (en) * | 1985-04-17 | 1987-08-11 | Raulins George M | Well apparatus |
US6125928A (en) * | 1996-12-16 | 2000-10-03 | Ab Grundstenen Ab (Metal Patent Whss Ab) | System for controlling and stopping oil drilling fires |
US5777257A (en) * | 1997-03-14 | 1998-07-07 | Senior Power Services, Inc., Demex Division | Shaped charge assembly with truncated liner |
US20100147519A1 (en) * | 2008-12-16 | 2010-06-17 | Schlumberger Technology Corporation | Mitigating perforating gun shock |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015075429A3 (en) * | 2013-11-19 | 2015-11-19 | Spex Services Limited | Improved tool |
CN105917069A (en) * | 2013-11-19 | 2016-08-31 | 斯派克斯服务有限公司 | Improved tool |
US9932792B2 (en) | 2013-11-19 | 2018-04-03 | Shell Oil Company | Tool |
AU2017210512B2 (en) * | 2013-11-19 | 2019-04-04 | SPEX Group Holdings Limited | Tool |
CN105917069B (en) * | 2013-11-19 | 2019-08-13 | 斯派克斯服务有限公司 | Improved tool |
WO2015105739A1 (en) * | 2014-01-07 | 2015-07-16 | Shell Oil Company | Severance tool |
Also Published As
Publication number | Publication date |
---|---|
WO2013033306A9 (en) | 2013-06-13 |
GB2509409A (en) | 2014-07-02 |
NO20140347A1 (en) | 2014-03-20 |
CN103764946A (en) | 2014-04-30 |
MY175923A (en) | 2020-07-15 |
US20140224500A1 (en) | 2014-08-14 |
AU2012301910A1 (en) | 2014-02-27 |
AU2012301910B2 (en) | 2016-02-18 |
NO346983B1 (en) | 2023-03-27 |
BR112014004627A2 (en) | 2017-03-21 |
BR112014004627B1 (en) | 2021-01-12 |
CN103764946B (en) | 2017-04-19 |
US9982500B2 (en) | 2018-05-29 |
GB2509409B (en) | 2018-12-19 |
GB201401840D0 (en) | 2014-03-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10119354B2 (en) | Well emergency separation tool for use in separating a tubular element | |
AU2019203013B2 (en) | Devices and related methods for actuating wellbore tools with a pressurized gas | |
US9982500B2 (en) | Well emergency separation tool for use in separating a tubular element | |
US11066892B2 (en) | Blowout preventer | |
US9200493B1 (en) | Apparatus for the shearing of pipe through the use of shape charges | |
AU2013222643B2 (en) | Riser cutting tool | |
CA2964843C (en) | Safety valve for production wells | |
WO2015105739A1 (en) | Severance tool |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12827682 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 1401840 Country of ref document: GB Kind code of ref document: A Free format text: PCT FILING DATE = 20120830 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1401840.2 Country of ref document: GB |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14241244 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2012301910 Country of ref document: AU Date of ref document: 20120830 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12827682 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014004627 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112014004627 Country of ref document: BR Kind code of ref document: A2 Effective date: 20140226 |