CN201265382Y - Tool module - Google Patents
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- CN201265382Y CN201265382Y CNU2008200071242U CN200820007124U CN201265382Y CN 201265382 Y CN201265382 Y CN 201265382Y CN U2008200071242 U CNU2008200071242 U CN U2008200071242U CN 200820007124 U CN200820007124 U CN 200820007124U CN 201265382 Y CN201265382 Y CN 201265382Y
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- blade
- piston
- cutter module
- shear
- pipe
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Abstract
The utility model relates to a cutter module comprising a first piston and a first shear blade. The first piston comprises at leas two movable telescopic elements used for stretching from a first contraction length to a second expansion length. The first shear blade is connected to the first piston to respond to the stretch of the first piston from the first contraction length to the second expansion length to cut off a pipe. The first shear blade is provided with a cutting edge with the radius larger than 0.01 inches.
Description
Technical field
The utility model relates in general to cutter module.
Background technology
The offshore system (offshore system) that is used for well operations in relative deep water generally includes standpipe (riser), and the blowout preventer set of its water surface device by ship and underwater well head couples together.The offshore standpipe provides a pipeline, can transmit between water surface ship and underwater well by this pipe running tool and fluid.
Be used for the offshore system that well surveying studies industry and also generally comprise safety systems, it when for example losing the ship stationkeeping ability, prevents that automatically well is communicated with fluid between the water surface ship when being in an emergency.Typically, safety systems comprises the testing tree under water in the blowout preventer set that is on the sleeve pipe (pipe string).
Testing tree generally includes valve portion under water, and this part has the normally close valve of the automatic closing well of one or more energy.Testing tree also comprises latching segment under water, and it can make under water the sleeve portion above the testing tree separate with testing tree under water.
If emergency occurred in the instrument process of arranging on coil pipe, for example, safety systems at first is used to cut off coil pipe.In typical safety systems, ball valve is carried out and is cut off coil pipe and close the two kinds of functions that flow.
Although effective to a certain extent, use ball valve to cut off coil pipe and proved that the coil pipe for large-size is difficult.In addition, use ball valve to carry out rupturing operation and have harmful sealing effectiveness for the sealing surfaces of valve.Specifically, sealing surfaces becomes and stays scar, thereby reduces leakage efficiency.
Therefore, need effective pipe cutting.
The utility model content
The utility model is a kind of cutter module, solve following technical problem: use ball valve to cut off coil pipe and proved that the coil pipe for large-size is difficult, in addition, use ball valve to carry out rupturing operation and have harmful sealing effectiveness for the sealing surfaces of valve.Specifically, sealing surfaces becomes and stays scar, thereby reduces leakage efficiency.Therefore, need effective pipe cutting.
In an embodiment of the present utility model, a kind of cutter module that cuts off pipe in well is provided, it is characterized in that, comprising: first piston, it comprises at least two movably telescopic elements, and this telescopic element is used for first piston is deployed into length of run from contracted length; With first shear-blade, it is connected on the first piston, with in response to first piston from the contracted length to the length of run expansion and cut off pipe, wherein, first shear-blade has radius greater than 0.01 inch cutting edge.
In another embodiment of the present utility model, a kind of system is provided, it is characterized in that comprise: be used to seal and hold the blowout preventer set of borehole pressure, this preventer has passage, and sleeve pipe extends in the well by described passage; Underwater well head; Safety systems, it has to be used to control and flows and be used for the valve module that the permission instrument descends and passes through on pipe; And cutter module, it is used to move admission passage, and is used for the permission instrument and is lowered by on pipe to passage, and described cutter module comprises: piston, it comprises at least two movably telescopic elements, and described telescopic element is used for piston is deployed into length of run from contracted length; And shear-blade, it is connected on the described piston, with in response to piston from the contracted length to the length of run expansion and cut off pipe, wherein, shear-blade has radius greater than 0.01 inch cutting edge.
In another embodiment of the present utility model, a kind of device is provided, it is characterized in that, comprising: cutter module, it comprise can be relative shear-blade, with at well internal cutting off pipe; With the dividing plate of different size, it is used for optionally being installed in the cutter module, to produce different skews to adapt to the pipe of different qualities between shear-blade.
The utlity model has following beneficial effect: can be used to cut off cable, slick line (slickline) or other production or connecting pipeline on demand.
Advantage of the present utility model and further feature will become clearly from following manual, accompanying drawing and claim.
Description of drawings
Accompanying drawing 1 has shown to have the offshore system of tree under water, and this sets the cutter module with embodiment of the utility model under water.
Accompanying drawing 2 has shown to have the submarine system of tree under water, and this sets the cutter module with embodiment of the utility model under water.
Accompanying drawing 3 has shown an embodiment of cutter module of the present utility model, and its blade is in deployed position.
Accompanying drawing 4 has shown an embodiment who is contained in the cutter module in setting under water, and its blade is at punctured position.
Accompanying drawing 5 provides the vertical view of v-shaped structure of an embodiment of cutting tip.
Accompanying drawing 6 provides the vertical view of bend radius structure of an embodiment of cutting tip.
Accompanying drawing 7 provides the vertical view of an embodiment of the cutting tip with flexible piston.
Accompanying drawing 8 provides the lateral view of an embodiment of the cutter module with flexible piston.
Accompanying drawing 9 has shown an embodiment of cutter module, and wherein cutter module is positioned under the ball valve.
Accompanying drawing 10 is that its blade shrinks according to the schematic diagram of the cutter module assembly of embodiment of the present utility model.
Accompanying drawing 11 is the more detailed view according to the shear-blade of the cutter module in the accompanying drawing 10 of embodiment of the present utility model.
Accompanying drawing 12 is the more detailed view according to the associated component of valve piston element in the accompanying drawing 10 of embodiment of the present utility model and cutter module.
Accompanying drawing 13 is the phantom drawings according to the shear-blade of embodiment of the present utility model.
Accompanying drawing 14 is the viewgraph of cross-section got along 14-14 line in the accompanying drawing 13 according to embodiment of the present utility model.
The specific embodiment
Should be understood that the utility model be not limited to shown in the specific embodiment of submarine system use, but can be used for cutting off any other well system of coil pipe, cable, slick line or other production or connecting pipeline with being equal to.
In addition, be described with reference to being arranged on the workover tool (intervention tools) that is provided with on the coil pipe although the utility model is main, will be appreciated that the utility model can be used to cut off cable, slick line (slickline) or other production or connecting pipeline on demand.
With reference to accompanying drawing, wherein similar Reference numeral is used to indicate similar parts in several figure, and accompanying drawing 1 has been described well 10 that passes fluid storage 12 and the offshore system 14 that is used for the productivity ratio of testing well 10.Offshore system 14 comprises water surface system 16 and submarine system 20, and this water surface system 16 comprises production ship 18, and this submarine system 20 comprises blowout preventer set 22 and underwater well head 24.
Underwater well head 24 is fixed on the bottom 26, and blowout preventer set 22 is installed on the underwater well head 24.Blowout preventer set 22 comprises ram blowout preventer 28 and annular preventer 30, and it is moved with sealing and holds pressure in the well 10.Offshore standpipe 32 couples together blowout preventer set 22 and ship 18, and passage 34 is provided, and instrument and fluid can transmit between ship 18 and well 10 by this passage 34.In the embodiment that shows, sleeve pipe 36 is positioned at offshore standpipe 32, flows to ship 18 to help formation fluid from fluid storage 12.
Set 40 under water and have valve module 46 and lock 48.Valve module 46 is as main control valve in the test process of well 10.Valve module 46 comprises normally closed flapper valve 50 and normally-closed ball valve 52.Flapper valve 50 and ball valve 52 can serial operations.If desired, lock 48 allows the top 54 of sleeve pipe 36 to separate from setting 40 under water.
In an embodiment of the present utility model, set 40 under water and also comprise cutter module 56 with relative shear-blade 58.Cutter module 56 is positioned at below the valve module 46.In the placement process of the workover tool that descends by sleeve pipe 36 on coil pipe, if emergency, the blade 58 on the cutter module 56 activated to cut off coil pipe before closing well.
Accompanying drawing 2 has shown the submarine system of the embodiment with cutter module 56 of the present utility model.Submarine system 20 is used to help the production from well 10 to the offshore vessels (not shown).Submarine system comprises blowout preventer set 22, underwater well head 24 and safety systems 38.Underwater well head 24 is fixed on the bottom 26, and blowout preventer set 22 is installed on the underwater well head 24.Blowout preventer set 22 comprises ram blowout preventer 28 and annular preventer 30, and it is moved with sealing and holds pressure in the well 10.Offshore standpipe 32 couples together blowout preventer set 22 and offshore vessels, and passage is provided, and instrument and fluid can transmit between ship and well 10 by this passage.In the embodiment that shows, sleeve pipe 36 is positioned at offshore standpipe 32, flows to ship to help formation fluid from the fluid storage.
When the condition on the ship departed from the boundary that presets, the safety systems 38 of submarine system 20 provided closing automatically of well 10.Safety systems 38 comprises the tree under water 40 that is on the sleeve pipe 36 and is positioned at blowout preventer set 22.The bottom 42 of sleeve pipe 36 can be supported by fluted hanger 44, or is fixed to well head 24 by pipe hanger running tool.Set 40 under water and have valve module 46 and lock 48.Valve module 46 is as main control valve in the test process of well 10.Valve module 46 comprises normally closed flapper valve 50 and normally-closed ball valve 52.Flapper valve 50 and ball valve 52 can in series be moved.If desired, lock 48 allows the top 54 of sleeve pipe 36 to separate from setting 40 under water.
Be contained in that to set in 40 be an embodiment of cutter module 56 of the present utility model under water.Cutter module 56 is positioned at below the valve module 46, and it is shown as its blade 58 and is in their open position in accompanying drawing 2.In the placement process of the workover tool that descends by sleeve pipe 36 on coil pipe, if emergency, the blade 58 on the cutter module 56 activated to cut off coil pipe before closing well.
Accompanying drawing 3 has shown an embodiment of cutter module 56 of the present utility model, and wherein its blade 58 is at their open position.Workover tool 60 descends on coil pipe 62 by cutter module 56.
Pressure port shown in the accompanying drawing 3 (or a plurality of pressure port) 72 is positioned at the side of cutter module 56.But, in another embodiment of the utility model, because be used for the space of pressure port (or a plurality of pressure port) 72 in the side of cutter module 56 very little or do not have, so pressure port (or a plurality of pressure port) 72 is positioned on the top surface of cutter module 56.More particularly, be arranged in the embodiment of the top surface of cutter module 56 in these pressure port of the present utility model (or a plurality of pressure port) 72, the passage that pressure port (or a plurality of pressure port) 72 is passed through to form on outer wall 70 is to be communicated with pressure chamber 62.
In order to activate or launch blade 58, fluid pressure supplies to one or more pressure port 72 by the control pipeline.The fluid pressure operation is sheared the coil pipe 62 of disconnected portion within it operation piston 64 is pushed to coil pipe 62 up to blade 58.After coil pipe 62 was cut off by blade 58, the fluid pressure of being supplied with by the control pipeline stopped, because much higher boring pressure is present in the sleeve pipe 36, the piston 64 and the blade 58 that are applied in pressure return to its open mode.When not having the surface test of boring pressure, can make piston 64 and blade 58 return to its open mode by giving standby control pipeline pressurization.
In certain embodiments, in order to allow the contraction of blade 58, remove material from the support-side of big piston or piston shell 66.This material is removed so that the rotation of big piston or piston shell 66 does not influence cutter knife from whole diameter.
Accompanying drawing 4 has shown the embodiment of the cutter module 56 when cutting blade 58 shrinks.Cutter module 56 is contained in to be set in 40 under water, and this is set 40 under water and comprises the valve module 46 with ball valve 52.Cutter module 56 is positioned at below the ball valve 52.
When activateding by exerting pressure to piston 64, cutting blade 58 is used to cut off any coil pipe that is positioned at cutter module 56.When coil pipe be cut off and from set under water 40 remove after, ball valve 52 is closed with closing well.
The blade 58 that cutter module 56 uses is designed to be specifically designed to cutting, so the legacy equipment that is used to cut coil pipe of ratio such as ball valve and so on provides more efficient cutting.In the test that carry out in the Schlumberger laboratory, the efficient of ball valve is approximately 20% with respect to basic shearing approximation in cutting.As a comparison, the cutting blade 58 of cutter module 56 has shown the efficient above 100%.
In addition, utilizing ball valve to cut large diameter coil pipe needs coil pipe to stand a large amount of tension force.As a comparison, cutter module 56 of the present utility model is not having can to cut the major diameter coil pipe under the situation of tension force.
The blade 58 of cutter module 56 is designed to prevent that the coil pipe that is cut is cracked.Therefore, the coil pipe of cutting is very easy to salvage after cutting off technology.Advantage is outstanding though the utility model can use many kinds of blade geometry, and for the purpose of setting forth, the geometry of two kinds of examples is shown in accompanying drawing 5 and 6.
In the vertical view of accompanying drawing 5, cutting surface 74 has the V-type geometry, and it is used to prevent the cracked of the coil pipe that is cut.Similarly, in the vertical view of accompanying drawing 6 showed, the cutting surface 74 of blade 58 had radius of curvature, and it closely mates the diameter that is arranged on coil pipe wherein.Two kinds of geometries are used to prevent that breaking of coil pipe is easier to guarantee fishing.
As mentioned above, many kinds of blade geometry can be used to cutting and coil pipe be broken so that advantage is outstanding.In fact, the most of shapes except the flat blade end also can realize same purpose.
In other embodiments, cutter module 56 uses flexible piston.Owing to be used for wherein holding the finite size of the sleeve pipe 36 of cutting equipment, the use of flexible piston makes the blade of piston and then connection mobile more farther than traditional piston.
The embodiment of flexible piston 76 is displayed in accompanying drawing 7 and 8.Accompanying drawing 7 provides the vertical view of telescopic piston 76, and accompanying drawing 8 provides lateral plan.
Behind cutting process, the pressure of supply stops, because much higher boring pressure exists in the sleeve pipe, the non-pressurised piston layer of flexible piston 76 returns to its non-expanded position.When not having the surface test of boring pressure, can make piston 76 and blade 58 be retracted to its open mode by giving standby control pipeline pressurization.
In operation, with reference to accompanying drawing 1, set 40 blowout preventer set 22 that are arranged in sleeve pipe 36 under water, this blowout preventer set 22 comprises ram blowout preventer 28 and annular preventer 30.Flapper valve 50 and the ball valve 52 set under water on 40 are opened to allow fluid to flow to the upper part 54 of sleeve pipe 36 from the lower part 42 of sleeve pipe 36.In addition, valve 50, the 52 permission instruments of opening descend to carry out workover treatment by sleeve pipe 36 via coil pipe (or cable, slick line, communication pipeline etc.).
When being in an emergency in the workover treatment process, cutter module 56 activated to cut off coil pipe.In case be cut off, be retained in coil pipe in the upper part 54 of sleeve pipe 36 is skipped valve module 46 up to its cut end by lifting ball valve 52 and flapper valve 50.At this moment, valve 50,52 can cut out automatically in case the fluid stopping body flows to the upper part 54 of sleeve pipe 36 from the lower part 42 of sleeve pipe 36.In case valve 50,52 is closed, lock 48 is released, so that the upper part 54 of sleeve pipe 36 separates and is recovered on the ship 18 or given rise to the height that allows ship 18 to drive away if desired from setting 40 under water.
After emergency, ship 18 can turn back to the well site, and offshore standpipe 32 is reconnected to blowout preventer set 22.Safety systems 38 can be rearranged, and the coil pipe that is retained in the lower part 42 of sleeve pipe 36 can be recovered by various fishings.
Notice that top embodiment is usefully important in peupendicular hole and horizontal well.Because the coil pipe below cutter module 56 stop valves 50,52, the cut-off parts of coil pipe will not disturbed closing of valve 50,52.
Another embodiment of the present utility model is presented in the accompanying drawing 9.In this embodiment, cutter module 56 be positioned at flapper valve 50 and ball valve 52 above.Like this, this embodiment is useful in peupendicular hole.
In operation, set 40 blowout preventer set 22 that are arranged in sleeve pipe 36 under water, this blowout preventer set 22 comprises ram blowout preventer 28 and annular preventer 30.Flapper valve 50 and the ball valve 52 set under water in 40 are opened to allow fluid to flow to the upper part 54 of sleeve pipe 36 from the lower part 42 of sleeve pipe 36.In addition, valve 50, the 52 permission instruments of opening descend to carry out workover treatment by sleeve pipe 36 via coil pipe (or cable, slick line, communication pipeline etc.).
When being in an emergency in the workover treatment process, cutter module 56 activated to cut off coil pipe.In case be cut off, be retained in coil pipe in the lower part 42 of sleeve pipe 36 and in peupendicular hole, land and skip the ball valve 52 and the flapper valve 50 of valve module 46 up to it.At this moment, valve 50,52 cuts out automatically in case the fluid stopping body flows to the upper part 54 of sleeve pipe 36 from the lower part 42 of sleeve pipe 36.In case valve 50,52 is closed, lock 48 is released, so that the upper part 54 of sleeve pipe 36 separates and is recovered on the ship (not shown) or given rise to the height that allows ship to drive away if desired from setting 40 under water.
After emergency, ship can turn back to the well site, and offshore standpipe 32 is reconnected to blowout preventer set 22.Safety systems 38 can be rearranged, and the coil pipe that is retained in the lower part 42 of sleeve pipe 36 can be recovered by various fishings.
With reference to the accompanying drawings 10, according to embodiment more of the present utility model, cutter module assembly 100 can be installed in for example to be set in 40 and so on sleeve pipe under water or the tree under water to replace above-described cutter module 56 or 76.In another embodiment of the present utility model, cutter module assembly 100 can be used in the missile silo.The longitudinal axis 110 of cutter module 100 aligns with 40 the longitudinal axis set under water of mounting cutter modular assembly 100 usually.Cutter module assembly 100 comprises two relative cutter module 115A and 115B, and each all has similar design and comprises flexible piston.When actuation pressure is applied on two cutter module 115A and the 115B simultaneously, each flexible piston launches (for example each from about five inches length to about nine inches length) and correspondingly to launch two relative cutting blades or shear-blade 160, extends through the pipe of the centre gangway 102 of cutter module assembly 100 with shearing.Shear-blade 160 is fallen the pipe that is cut around the longitudinal axis 110 bendings with guiding and is entered in the shear-blade 160.
As what describe below, cutter module assembly 100 has special characteristic and relevant with the cutting pipe occurs in destruction and/or infringement on the cutting blade to prevent other.
More particularly, according to embodiment more of the present utility model, each shear-blade 160 is made by the S53 stainless steel, and this stainless steel is the stainless steel of the very easy extension of high strength, high rigidity.The stainless use of S53 allows shear-blade 160 to carry out a plurality of cuttings and has very little wearing and tearing or distortion.
In conjunction with the accompanying drawings 10 with reference to the accompanying drawings 11, according to embodiment more of the present utility model, shear-blade 160 can have the roughly section of V-type cross section, and its pipe piece that impels cutting separately.Shear-blade 160 also includes the cutting edge 210 that the destination is made as rounding.Specifically, according to embodiment more of the present utility model, the radius R of cutting edge 210 can be at least 0.01 inch, can be 0.06 inch (as example more specifically).Other radius is possible and in the scope of appended claim.
Radius R is enough little so that pipe is cut rather than by cracked.But radius R is held enough and fractures in cutting process with the sheet that prevents shear-blade 160 greatly, and this can occur in more on the sharp-cutting edge in other cases.In addition, the rounding shape of cutting edge 210 (rounded shape) has been improved stress distribution in shear-blade 160.More particularly, the rounding section of cutting edge 210 prevents heavily stressed along cutting edge 210, and this situation is relevant with sharper keen cutting profile and take place.
Return with reference to accompanying drawing 10, cutter module assembly 100 has supplementary features, and these supplementary features relate to the destruction that prevents shear-blade 160.Turn to concrete details more, cutter module 115A and 115B are placed in the pressure hull 120 of cutter module assembly 100.Centre gangway 102 extends through housing 120 to constitute the part set 40 whole centre gangway under water.Housing 120 comprises opening or the groove 122 that radially is provided with, and it holds cutter module 115A and 115B.According to embodiment more of the present utility model, housing 120 can be made by alloy 718 materials.
Cutter module 115A is described below according to embodiment more of the present utility model, is to be understood that cutter module 115B has similar design.According to embodiment more of the present utility model, the flexible piston of cutter module 115A is formed by two piston layers, although can constitute by surpassing two piston layers according to the flexible piston of other embodiment of the utility model.In the specific examples that accompanying drawing 10 is described, piston layer comprises little piston element 140 (constituting a piston layer), and it is placed in the inside cylinder body 132 of big piston element 130 (constituting another piston layer).O shape circle is used to form the sealing between valve piston element 130 and the big piston element 140.
In conjunction with the accompanying drawings 10 with reference to the accompanying drawings 12, valve piston element 140 comprises piston head 230, and described piston head 230 has upper surface 231, and when applying fluid pressure so that moving knife tool module 115A, upper surface 231 is formed for the power of driving element 140.Piston head 230 is concentricity with the inside cylinder body 132 of big piston element 130, very closely sets size with the diameter of inner cylinder body 132, and is configured to operation in inner cylinder body 132 usually.Valve piston element 140 also comprises bar 236, and bar 236 radially extends through the opening 131 (referring to accompanying drawing 10) of bigger piston element 130 from piston head 230.Describe as accompanying drawing 10, O shape circle forms the external surface of piston rod 236 and the sealing between the opening 131.
Bar 236 comprise opening 238 from piston head 230 end farthest, opening 238 is concentricity with bar 236, is used for valve piston element 140 is connected to shear-blade 160.More particularly, according to embodiment more of the present utility model, shear-blade 160 has axle 142 (referring to accompanying drawings 11), and axle 142 comprises external screw-thread, its with in be lining in the respective threaded engagement of opening 238.
In the further feature of valve piston element 140, according to embodiment more of the present utility model, valve piston element 140 is made by alloy 718 materials, as what discuss below, its piston head 230 can comprise section 232 (referring to accompanying drawing 12), in the process of dismounting cutter module 115A, section 232 is beneficial to removes valve piston element 140 (and being connected on the shear-blade 160).
As can be seen, in cutting operation process, valve piston element 140 transforms and transmission fluid pressure enters in the shear-blade 160 from describe the preceding.
With reference to the accompanying drawings 10, according to embodiment more of the present utility model, big piston element 130 also is constructed to move in response to applying with the pressure that activates cutting module 115A.As shown in Figure 10, big piston element 130 is placed in the groove 122 of housing 120 usually, and usually around valve piston element 140.The opening of the groove 122 that piston cap 124 sealings expose in addition.Therefore, groove 122 and lid 124 formation big piston elements 130 and valve piston element 140 operate in piston chamber wherein.
According to embodiment more of the present utility model, piston cap 124 radially extends in the groove 122, so that the cylindrical wall 125 of piston cap 124 is at the piston head 131 of big piston element 130 with limit between (housing 120) inwall of groove 122 and extend.One or more O shapes are enclosed the sealing between the wall 125 that is formed on piston head 131 and piston cap 124.In addition, O shape is enclosed the sealing between the inwall that can be formed on piston cap 124 and groove 122.According to embodiment more of the present utility model, piston cap 124 is formed by alloy 718 materials.
Describe as accompanying drawing 10, cutter housing 120 comprises the opening 123 between groove 122 and the centre gangway 102, and when cutter module 115A activated, big piston element 130 extends by centre gangway 102.The sealing of O shape circle between the external surface of opening 123 places formation housing 122 and big piston element 130.Therefore, big piston element 130 is radially mobile inwards in response to pressure; The motion of big piston element 130 also drives valve piston element 140, and it further extends (because telescopic arrangement) with the shear-blade 160 that connects.According to embodiment more of the present utility model, big piston element 130 is formed by alloy 718 materials.
In order to activate flexible piston, according to embodiment more of the present utility model, for the purpose to big piston element 130 and valve piston element 140 communication of fluid pressure, cutter module 115A comprises at least one passage 126.More particularly, according to embodiment more of the present utility model, the route that passage (or a plurality of passage) 126 is set is by piston cap 124, for seal channel O shape circle strides across passage (or a plurality of passage) 126.Passage (or a plurality of passage) 126 is transported to pressure the external surface of the piston head of big piston element 130.
In further feature, in order to reset the purpose of flexible piston position when driving pressure is released, big piston element 130 can also comprise one or more passages 133.More particularly, according to embodiment more of the present utility model, the zone of passage 133 below the piston head of big piston element 130 extends to the zone 132 (in inner cylinder body) below the piston head of valve piston element 140.Therefore, after the driving pressure on flexible piston was released, passage 133 was communicated with pressure so that valve piston element 140 is recovered to get back to its concave position.
According to embodiment more of the present utility model, cutter module assembly 100 can have one or more additional features to limit or to prevent the damage of shear-blade 160.For example, describe as accompanying drawing 10, more particularly, according to embodiment more of the present utility model, cutter module 115A comprises piston dividing plate 150, and for example, dividing plate 150 is ring usually, and it is around the bar 236 (also referring to accompanying drawing 12) of valve piston element 140.
Usually, in the operating process of cutter module 115A, the expansion of piston dividing plate 150 restriction shear-blades 160.More particularly, dividing plate 150 limits valve piston element 140 with respect to the moving of big piston element 130, because dividing plate 150 has been set up the skew of fixing between other contact surface 161 (referring to accompanying drawing 10) of the bottom 233 of the piston head 230 of valve piston element 140 (referring to accompanying drawing 12) and big piston element 130 in cutting operation process.Because the restriction that this moves, can be based on the sizes of the pipe that will be cut and control in the skew of the minimum between the relative shear-blade 160 or gap.
More particularly, have been found that blade and pipe impact mutually when shear-blade 160 moves through the point that pipe is cut, this causes the excessive lateral stress (not occurring) in the blade 160 in the cutting operation of reality.These lateral stresses make blade 160 rupture conversely.Therefore,, can realize successful pipe cutting, prevent the fracture of shear-blade 160 simultaneously by moving of restriction shear-blade 160.
Therefore, according to embodiment more of the present utility model, one group or one the cover different size (different-thickness just) piston dividing plate 150 can offer cutter module assembly 100 so that on cutter module 115A and 115B, select and install suitable dividing plate 150 (the piston dividing plate 150 that just has suitable thickness) based on one or more characteristics (for example size of pipe and/or ductility) of the pipe that is cut.According to embodiment more of the present utility model, the dividing plate 150 of using same thickness for concrete cutting can be installed on each cutter module 115A and the 115B.
For example, the suitable thickness of piston dividing plate 150 utilizes operation peculiar (job-specific) pipe sample to determine by the test cutting.In this, by repeating successfully to cut the measurement result of pipe, this measurement result can be used to select correct block board thickness, so that the group of the suitable dimension of dividing plate 150 (just each cutter module 115A, 115B are) is selected for the pipe that the needs that creep into are cut downwards.According to embodiment more of the present utility model, piston dividing plate 150 can be made by 316 stainless steels.
In conjunction with the accompanying drawings 10 with reference to the accompanying drawings 12, according to embodiment more of the present utility model, in the further feature of cutter module 115A, for restriction valve piston element 140 in the process of dismounting cutter module 115A (with and subsidiary shear-blade 160) the purpose of motion, cutter module 115A can comprise back-up ring 138 (referring to accompanying drawing 12).In this, when cutter module 115A is disassembled when being removed with piston cap 124, valve piston element 140 must be with big power pulling to remove whole valve piston element 140, big piston element 130 and shear-blade sub-component (shear-blade 160, axle 142).Prevent that at this process guide ring 138 shear-blade 160 from contacting with big piston element 130, thereby protection shear-blade 160 is avoided infringement or is broken.
In order to prevent that valve piston element 140 breaks away from advance from cutter module 115A, back-up ring 138 has formed backstop so that valve piston element 140 is remained in the big piston element 130.More particularly, according to embodiment more of the present utility model, valve piston element 140 comprises annular shoulder 250 (referring to accompanying drawing 12), and shoulder 250 is configured to contact the inner annular part of back-up ring 138.The outside annular section 260 of back-up ring 138 extends in the corresponding annular groove, and these cannelures form on the inwall of the inside of big piston element cylinder body 132.
Therefore, when cutter module 115A was assembled fully, back-up ring 138 was connected to the contraction solstics that is used for valve piston element 140 on the big piston element 130 with generation.When cutter module 115A was disassembled, before back-up ring 138 was removed, an instrument can be used to be engaged to the section 232 of valve piston assembly 140, to allow pulling out of valve piston element 140 and the shear-blade 160 that attaches.According to embodiment more of the present utility model, back-up ring 138 can be made by 300 series stainless steels.
Return referring to accompanying drawing 10, according to embodiment more of the present utility model, in the further feature of cutter module assembly 100, for the purpose of guiding when shear-blade 160 stretches and shrinks and support shear-blade, gathering sill 171 (gathering sill 171 is depicted in the accompanying drawing 10) is used processing in cutter housing 122.Gathering sill 171 keeps shear-blade 160 appropriate arrangements to be used for cutting, perpendicular to boring.In embodiment more of the present utility model, for the purpose of extra support is provided for shear-blade in the whole opening/closing cyclic process of shear-blade, blade key 170 (for example being made by alloy 718 materials) is assembled in each gathering sill 171.
According to embodiment more of the present utility model, cutter module assembly 100 also can comprise borehole sealing joint 190, and an end of itself and toolbox housing 122 forms be tightly connected (for example by O shape circle).In addition, cutter module assembly 100 can comprise sleeve nut's connector 180 (for example being made by high strength steel), and it is for the purpose that cutter module assembly 100 is connected to sleeve pipe under water and use.Spiral shell housing connector 180 is for cutter module assembly 100 provides support structure, carried any load of being suspended on below the cutter module assembly 100 and has been used as centralizer during by the operation manhole appendixs when assembly 100.The assembling of cutter module assembly 100 can be assisted by one or more adjusting pins 181 in addition, and adjusting pin 181 directing assemblies 100 are aimed at the remainder of sleeve pipe or tree.
Accompanying drawing 13 has been described the phantom drawing according to the shear-blade 400 of embodiment more of the present utility model.Accompanying drawing 14 has been described the corresponding cross-sectional view got along the 14-14 line of accompanying drawing 13.As what can see, shear-blade 400 comprises the cutting surface 414 with general curved section 410, and its part is extended around the longitudinal axis of cutter module assembly.With reference to the accompanying drawings 14, cutting surface 414 also with respect to the vertical axis tilt of cutter module assembly to form corresponding V-arrangement cross section.Although do not describe in attached Figure 13 and 14, the cutting edge 418 of shear-blade 400 has circular radius, at least 0.01 inch radius (for example 0.06 inch) for example, as shown in Figure 11.In further feature, shear-blade 400 can comprise axle 402, and for shear-blade 400 being connected to the purpose of valve piston element 140, axle 402 comprises screw thread consent 420.It should be noted that shear-blade 400 is one of many possibility embodiment, this will fall in the scope of appended claim.
Other embodiment is also in the scope of appended claim.For example, according to embodiment more of the present utility model, for lifting and tool operating modular assembly 100 are assembled into the purpose of tree with handle component 100, cutter housing 120 (for example referring to accompanying drawing 10) can comprise cannelure at its outer surface.The anchor clamps that cannelure allows to have corresponding shoulder are caught cutter module assembly 100, so that assembly 100 can not slide in operating process.Therefore, cutter module assembly 100 can level transport and vertical the use.From horizontally rotating vertically, because the size of testing tree and weight (size of about as an example 20,000 pounds and 20+ inch), this will the big operation of the amount of being testing tree for the operation gear.
Though the utility model discloses with respect to the embodiment of limited quantity,, it will be understood by those skilled in the art that a large amount of variations and change for can therefrom drawing by means of the disclosure.Appended claim is intended to cover variation and the change in all these spirit and scope that fall into the utility model essence.
Claims (14)
1, a kind of cutter module that cuts off pipe in well is characterized in that, comprising:
First piston, it comprises at least two movably telescopic elements, this telescopic element is used for first piston is deployed into length of run from contracted length; With
First shear-blade, it is connected on the first piston, with in response to first piston from the contracted length to the length of run expansion and cut off pipe,
Wherein, first shear-blade has radius greater than 0.01 inch cutting edge.
2, cutter module as claimed in claim 1 is characterized in that, the radius of described cutting edge is 0.06 inch.
3, cutter module as claimed in claim 1 is characterized in that, described first shear-blade comprises the S53 stainless steel.
4, cutter module as claimed in claim 1 is characterized in that, described at least two movably telescopic elements comprise the first telescopic element that is arranged in the second telescopic element, and described cutter module also comprises:
Back-up ring, it is used to protect the contraction of first shear-blade and first piston and the dismounting of cutter module.
5, cutter module as claimed in claim 4 is characterized in that, described back-up ring comprises standby mechanism, to prevent if first shear-blade when fracture first telescopic element comes out from the second telescopic element.
6, cutter module as claimed in claim 4 is characterized in that, described back-up ring is used to prevent that first shear-blade from contacting the second telescopic element.
7, cutter module as claimed in claim 4 is characterized in that, described back-up ring comprises ring.
8, cutter module as claimed in claim 1 is characterized in that, described at least two movably one of telescopic element be included in first flexible in the static tubular body telescopic element and the flexible second telescopic element in the first telescopic element.
9, cutter module as claimed in claim 1 is characterized in that, also comprises:
Another piston relative with first piston;
Be connected to second shear-blade of described another piston,
Wherein, described another piston is used for cooperating with first piston mobile, so that first and second shear-blades cut off pipe.
10, cutter module as claimed in claim 1 is characterized in that, also comprises:
The housing that holds first shear-blade, this housing comprises groove, to guide first shear-blade when first shear-blade launches and shrink.
11, a kind of system is characterized in that, comprising:
Be used to seal and hold the blowout preventer set of borehole pressure, this preventer has passage, and sleeve pipe extends in the well by described passage;
Underwater well head;
Safety systems, it has to be used to control and flows and be used for the valve module that the permission instrument descends and passes through on pipe; With
Cutter module, it is used to move admission passage, and is used for the permission instrument and is lowered by on pipe to passage, and described cutter module comprises:
Piston, it comprises at least two movably telescopic elements, described telescopic element is used for piston is deployed into length of run from contracted length; With
Shear-blade, it is connected on the described piston, with in response to piston from the contracted length to the length of run expansion and cut off pipe, wherein, shear-blade has radius greater than 0.01 inch cutting edge.
12, a kind of device is characterized in that, comprising:
Cutter module, it comprise can be relative shear-blade, with at well internal cutting off pipe; With
The dividing plate of different size, it is used for optionally being installed in the cutter module, to produce different skews to adapt to the pipe of different qualities between shear-blade.
13, device as claimed in claim 12 is characterized in that:
Described cutter module comprises at least two movably telescopic elements, its be included in first flexible in the static tubular body telescopic element and in the described first telescopic element the flexible second telescopic element and
Dividing plate is used to produce the different distance that the first telescopic element moves with respect to the second telescopic element.
14, device as claimed in claim 13 is characterized in that:
Described first telescopic element comprise the axle that extends to one of shear-blade and
Each dividing plate is used for installing around axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200071242U CN201265382Y (en) | 2008-02-25 | 2008-02-25 | Tool module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200071242U CN201265382Y (en) | 2008-02-25 | 2008-02-25 | Tool module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201265382Y true CN201265382Y (en) | 2009-07-01 |
Family
ID=40831750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200071242U Expired - Fee Related CN201265382Y (en) | 2008-02-25 | 2008-02-25 | Tool module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201265382Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9739110B2 (en) | 2013-05-24 | 2017-08-22 | Eni S.P.A. | Emergency valve assembly for extraction wells, well equipped with said valve and process for managing an extraction well with said valve under emergency conditions |
-
2008
- 2008-02-25 CN CNU2008200071242U patent/CN201265382Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9739110B2 (en) | 2013-05-24 | 2017-08-22 | Eni S.P.A. | Emergency valve assembly for extraction wells, well equipped with said valve and process for managing an extraction well with said valve under emergency conditions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20120225 |