CN105781473B - Reducing blowout hookup for controllable snubbing serving - Google Patents
Reducing blowout hookup for controllable snubbing serving Download PDFInfo
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- CN105781473B CN105781473B CN201610300974.0A CN201610300974A CN105781473B CN 105781473 B CN105781473 B CN 105781473B CN 201610300974 A CN201610300974 A CN 201610300974A CN 105781473 B CN105781473 B CN 105781473B
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- Prior art keywords
- reducing
- flashboard
- assembly
- parallels
- rubber body
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The present invention is a kind of reducing blowout hookup for controllable snubbing serving, including flashboard assembly and slips assembly；Flashboard assembly seals before including flashboard body and reducing；Sealing includes rubber body, preceding envelope skeleton and floating parallels before reducing；Rubber body is fixedly connected with flashboard body, and the front end of rubber body is equipped with the first semicircular indentations；Preceding envelope skeleton is separately fixed at the upper and lower surface of rubber body；The front end of preceding envelope skeleton is equipped with second semicircular indentations concentric with the first semicircular indentations, and the diameter of the second semicircular indentations is more than the diameter of the first semicircular indentations；Float cushion iron clamp is located between rubber body upper surface and corresponding preceding envelope skeleton；Floating parallels is fixedly connected with rubber body and can relatively preceding envelope skeleton translation gliding；The front end of floating parallels is equipped with threeth semicircular indentations concentric and identical diameter with the first semicircular indentations.It is adapted to the clamping demand of two kinds of different diameter specifications tubing strings, it is not necessary to which flashboard and slips are replaced in scene, easy to use.
Description
Technical field
The present invention is on a kind of shaft mouth operation device, more particularly to a kind of reducing blowout prevention for controllable snubbing serving
Device.
Background technology
It is live recovering the oil with the development of Liaohe Oil Field oil recovery technique, the extensive use of underground combined string, but do not have also
The blowout hookup for having energy while seal combination tubing string matches therewith.At present, the blowout control equipment master used in workover treatment field
If the single gauge ram preventer of φ 180mm latus rectums.Required according to well control, when operation needs to carry out flashboard at the scene
More change jobs, to adapt to the blowout prevention needs of field combinations tubing string.Thus there are great work intensity, efficiency is low, difficult management, work
The problem of industry risk is high.So need to be improved existing single gauge ram preventer, to adapt to the requirement of field operation.
Thus, the present inventor relies on experience and the practice for being engaged in relevant industries for many years, proposes that one kind is used for controllable no killing well
The reducing blowout hookup of operation, the defects of to overcome the prior art.
The content of the invention
It is an object of the invention to provide a kind of reducing blowout hookup for controllable snubbing serving, without replacing lock
Plate, can seal two kinds of specification tubing strings at the same time.
Another object of the present invention is to provide a kind of reducing blowout hookup for controllable snubbing serving, can press from both sides at the same time
Tight two kinds of specification tubing strings.
The object of the present invention is achieved like this, a kind of reducing blowout hookup for controllable snubbing serving, the change
Footpath blowout hookup includes the flashboard assembly that a pair of of front end is oppositely arranged；The flashboard assembly seals before including flashboard body and reducing；
Sealing is tabular before the flashboard body and the reducing, before sealing is fixed at the flashboard body before the reducing
End；
Sealing includes rubber body, preceding envelope skeleton and floating parallels before the reducing；The rubber body, the preceding envelope bone
Frame is concordant with the front end of the floating parallels；The rubber body is fixedly connected with the flashboard body, before the rubber body
End is equipped with the first semicircular indentations；Envelope skeleton is separately fixed at the upper and lower surface of the rubber body before described；It is described
The front end of preceding envelope skeleton is equipped with second semicircular indentations concentric with first semicircular indentations, and described second is semicircle scarce
The diameter of mouth is more than the diameter of first semicircular indentations；The float cushion iron clamp be located at the rubber body upper surface with it is right
Between the preceding envelope skeleton answered；The floating parallels is fixedly connected with the rubber body and can relatively described preceding envelope frame body plan
Move and slide；It is semicircle scarce that the front end of the floating parallels is equipped with threeth concentric and identical diameter with first semicircular indentations
Mouthful.
In the better embodiment of the present invention, it is sheet to seal skeleton and the floating parallels before described, described floating
Dynamic parallels is made of to be semicircle at least two panels parallels plate, and adjustment gap is equipped between adjacent two panels parallels plate.
In the better embodiment of the present invention, the upper and lower surface of the rubber body be respectively equipped with it is described
The depression that preceding envelope frame configuration coordinates, seals skeleton in the corresponding depression before described, upper with the rubber body
Surface and lower surface flush；Semicircle parallels mounting groove is equipped between the upper surface of the rubber body and the preceding envelope skeleton,
The floating parallels is in the parallels mounting groove, the upper surface of the floating parallels and the corresponding preceding envelope skeleton
Lower surface contacts, and the lower surface of the floating parallels is fixedly connected with the rubber body.
In the better embodiment of the present invention, the front end of the flashboard body is equipped with preceding sealing mounting groove, the reducing
Preceding sealing is inlaid in the preceding sealing mounting groove, and the front end of the flashboard body is stretched out in the front end sealed before the reducing；It is described
The upper surface of flashboard body is equipped with sealing mounting groove, is sealed in the sealing mounting groove embedded with flashboard top.
In the better embodiment of the present invention, the reducing blowout hookup further includes the card that a pair of of front end is oppositely arranged
Watt assembly, the slips assembly are arranged on the lower section of the flashboard assembly；The front end of the slips assembly is lacked equipped with reducing arc
Mouthful, the reducing arc notch is made of the first segmental arc and the second segmental arc；The both sides of first segmental arc are sequentially connected
Second segmental arc；The diameter of second segmental arc is more than the diameter of first segmental arc.
In the better embodiment of the present invention, the corresponding center of circle of second segmental arc is relative to first arc
The corresponding center of circle of section forms eccentricity to the front end of the slips assembly.
In the better embodiment of the present invention, the reducing blowout hookup further includes housing and drive cylinder, described
The center of housing is equipped with the axially extending bore of up/down perforation；Positioned at upper strata is respectively equipped with the side wall of the symmetrical both sides of housing
One housing chamber and the second housing chamber positioned at lower floor；A pair of flashboard assembly is separately mounted in first housing chamber,
A pair of slips assembly is separately mounted in second housing chamber；The rear end of the flashboard assembly and the slips assembly
Rear end is connected with the drive cylinder respectively, and the drive cylinder drives the corresponding flashboard assembly and the slips total respectively
Into moving horizontally.
The present invention a better embodiment in, the drive cylinder be equipped with four, respectively with the corresponding flashboard
Assembly is connected with the slips assembly；The slips assembly is located at the underface of the flashboard assembly, and the slips assembly is put down
It is parallel with the translation direction of the flashboard assembly to move direction.
In the better embodiment of the present invention, have between the lower surface of the flashboard assembly and first housing chamber
There is flying height.
In the better embodiment of the present invention, the drive cylinder includes side door, piston, cylinder sleeve, cylinder cap, locking
Axis；The side door is connected to the side of the housing, and one end of the cylinder sleeve connects the side door, and the other end of the cylinder sleeve connects
Connect the cylinder cap；The cylinder sleeve Inner Constitution cylindrical shape plunger shaft, the piston are located in the plunger shaft；The one of the piston
End is fixedly connected with the flashboard assembly or the slips assembly, and the other end of the piston connects the lock shaft.
In the better embodiment of the present invention, connecting cavity is equipped with the piston, is set on the inner wall of the connecting cavity
There is internal thread；One end that the lock shaft is connected with the piston is equipped with external screw thread, the lock shaft and the connecting cavity screw thread
Connection, and externally threaded length is more than the stroke of the piston on the lock shaft；The lock shaft other end hermetically passing institute
Cylinder cap is stated, the lock shaft is equipped with annular convex platform, and the annular convex platform can be resisted against the inner side end of the cylinder cap.
From the above mentioned, reducing blowout hookup of the invention uses the flashboard assembly of reducing, close before the reducing of flashboard assembly
Envelope can produce the principle of elastic deformation when compressed backward using the floating parallels that be connected with rubber body, seal it is small directly
During the tubing string of footpath, sealed using the minor diameter semicircular indentations of floating parallels and rubber body front end；In sealing large diameter pipe
During column, floating parallels and rubber body are deformed being moved rearwards by tubing string compression, utilize the major diameter half of preceding envelope skeleton front end
Circumferential notch is sealed.The front end of slips assembly using eccentric Gothic into reducing arc notch, be adapted to two
The clamping demand of kind different diameter specifications tubing string.There is certain flying height in flashboard assembly lower part with housing chamber, can reduce friction
The abrasion of resistance and rubber, is conducive to extend the service life of rubber parts；When having pressure after closing well, in well, down-hole pressure energy
It is enough to enter flashboard assembly back from flying height, under borehole pressure effect, produce one kind at flashboard assembly back and lower part and help
The thrust of envelope.Slips assembly and flashboard assembly can be used alone, and also can be combined and use, and can seal and clamp at the same time two kinds of diameter rule
The tubing string of lattice, it is not necessary to which flashboard and slips are replaced in scene, easy to use.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1：For the longitudinal sectional view of reducing blowout hookup of the present invention.
Fig. 2：For the transverse sectional view of reducing blowout hookup of the present invention.
Fig. 3：For the sectional view of flashboard assembly in the present invention.
Fig. 4：For the structure chart of A-A sections in Fig. 3.
Fig. 5：For the top view of flashboard assembly in the present invention.
Fig. 6：For the sectional view sealed before reducing in the present invention.
Fig. 7：For the top view sealed before reducing in the present invention.
Fig. 8：For the top view of slips assembly in the present invention.
Fig. 9：State diagram during small-size diameter string is clamped for slips assembly.
Figure 10：State diagram during major diameter tubing string is clamped for slips assembly.
Figure 11：For the side structure schematic diagram of middle casing of the present invention.
Embodiment
In order to which the technical features, objects and effects of the present invention are more clearly understood, now control illustrates this hair
Bright embodiment.
As depicted in figs. 1 and 2, the present invention provides a kind of reducing blowout hookup 100 for controllable snubbing serving, institute
Stating reducing blowout hookup 100 includes a pair of of flashboard assembly 10, and a pair of of 10 front end of flashboard assembly is opposite to be symmetrical arranged, flashboard assembly
10 are used to seal the outside of tubing string.As shown in Fig. 3 to Fig. 7, the flashboard assembly 10 includes the flashboard to link together
102 are sealed before body 101 and reducing；Sealing 102 is tabular, it is specified that towards tubing string before the flashboard body 101 and the reducing
The direction at center is front end, and the direction away from tubing string center is rear end.Sealing 102 is fixed at the flashboard before the reducing
The front end of body 101.Flashboard body 101 is played to overall supporting role, before reducing sealing 102 play the sealing function to tubing string.
It is also the component of a tabular that flashboard assembly 10 is overall, and when work is horizontal positioned.Sealing 102 includes rubber body before the reducing
1021st, preceding envelope skeleton 1022 and floating parallels 1023；The rubber body 1021, the preceding envelope skeleton 1022 and the float cushion
The front end of iron 1023 is concordant, forms a smooth end face so that seal closure is around tubing string.The rubber body 1021
With elasticity, preceding envelope skeleton 1022 and floating parallels 1023 are metal material, the rubber body 1021 and the flashboard body
101 are fixedly connected, and the front end of the rubber body 1021 is equipped with the first semicircular indentations 1024, first semicircular indentations 1024
Diameter it is identical with applicable minimum tube column diameter, the outer wall for being fastened on tubing string can be sealed.Envelope skeleton 1022 is equipped with before described
Two, the upper and lower surface of the rubber body 1021 is separately fixed at, plays the reinforcement support to rubber body 1021
Effect；Fixation generally use vulcanization wherein between elastomeric material and metal material is fixed, by vulcanization make metal and rubber it
Between bond.The front end of envelope skeleton 1022 is equipped with second semicircular indentations concentric with first semicircular indentations 1024 before described
1025, and the diameter of second semicircular indentations 1025 is more than the diameter of first semicircular indentations 1024；So as to preceding envelope
The edge of the second semicircular indentations 1025 on skeleton 1022 is located at behind 1024 edge of the first semicircular indentations.The floating
Parallels 1023 is folded between 1021 upper surface of rubber body and the corresponding preceding envelope skeleton 1022, floating parallels 1023
Upper surface and the lower surface of preceding envelope skeleton 1022 be affixed, the lower surface of floating parallels 1023 is fixed with the vulcanization of rubber body 1021
Together；By the elastic deformation of the rubber body 1021, floating parallels 1023 can it is relatively described before envelope skeleton 1022 translate
Slide.The front end of the floating parallels 1023 is equipped with the concentric and identical diameter with first semicircular indentations 1024 the 3rd half
Circumferential notch 1026.That is the of 1026 edge of the 3rd semicircular indentations of 1023 front end of floating parallels and 1021 front end of rubber body
One semicircular indentations, 1024 edge is completely superposed, and can act on the outer wall for blocking tubing string at the same time, close for being carried out to small-size diameter string
Envelope, floating parallels 1023 also function to the effect for strengthening support.
Sealing 102 utilizes the floating parallels being connected with rubber body 1021 before the reducing of the reducing blowout hookup flashboard assembly
1023 can produce the principle of elastic deformation when compressed backward, when sealing small-size diameter string, utilize floating parallels 1023
And the minor diameter semicircular indentations of 1021 front end of rubber body are sealed；When sealing major diameter tubing string, floating parallels 1023
And rubber body 1021 is deformed being moved rearwards by tubing string compression, lacked using the major diameter of preceding 1022 front end of envelope skeleton is semicircle
Mouth is sealed.Do not have to replace flashboard during field operation, can just seal two kinds of specification tubing strings at the same time.
Further, as shown in Fig. 8 to Figure 10, the reducing blowout hookup 100 further includes a pair of of slips assembly 20, a pair of card
Watt 20 front end of assembly is opposite is symmetrical arranged.The slips assembly 20 is arranged on the lower section of the flashboard assembly 10, for pipe
Column is clamped；Slips assembly 20 is also plate body, and when work is horizontally disposed with.The front end of the slips assembly 20 is equipped with reducing arc
V notch v 201, the reducing arc notch 201 are made of the first segmental arc 2011 and the second segmental arc 2012；First arc
The both sides of shape section 2011 are sequentially connected second segmental arc 2012；I.e. the first segmental arc 2011 is located at reducing arc notch 201
Rear portion centre position, the second segmental arc 2012 is located at the front part sides position of reducing arc notch 201.Second segmental arc
2012 diameter is more than the diameter of first segmental arc 2011；Second segmental arc, the 2012 corresponding center of circle is relative to described
First segmental arc, the 2011 corresponding center of circle produces eccentricity, forms eccentric bicircular arcs to the front-end offset of the slips assembly 20
Structure.First segmental arc 2011 is used for clamping the tubing string of minor diameter, and the second segmental arc 2012 is used for clamping the tubing string of major diameter, folder
The state of tight small tubing string and big tubing string difference is as shown in Figure 9 and Figure 10.
The reducing blowout hookup 100 the front end of slips assembly 20 using eccentric Gothic into reducing arc notch
201, it is adapted to the clamping demand of two kinds of different diameter specifications tubing strings, it is not necessary to which slips is replaced at scene, easy to use.
Referring to a kind of Fig. 1 to Figure 11 specific embodiments that the present invention will be described in detail.
In this specific embodiment, reducing blowout hookup 100 includes housing 30, drive cylinder 40, flashboard assembly 10 and card
Watt assembly 20.The flashboard assembly 10 and the slips assembly 20 are arranged in pairs, and a pair of 10 front end of flashboard assembly is opposite
Be symmetrical arranged, a pair of 20 front end of slips assembly is opposite to be symmetrical arranged.The front end of a pair of of flashboard assembly 10 can be mutual
Docking closing, corresponding two semicircular indentations form complete circular seal on the outer wall of tubing string.A pair of of slips assembly 20
Equally it is docking together so as to clamp tubing string.The center of the housing 30 is equipped with the φ 180mm axially extending bores 301 of up/down perforation；
The middle part shape of housing 30 is square, and the top and bottom of housing 30 are standard flange structure, standard flange and square
Between for transition connection cylindrical neck.It is respectively equipped with the side wall of the 30 symmetrical both sides of middle part square of housing positioned at upper
The first housing chamber 302 and the second housing chamber 303 positioned at lower floor of layer；The first housing chamber 302 and the second housing chamber per side
About 303 faces and it is arranged in parallel, is rectangular cavities, the first housing chamber 302 and the second housing chamber 303 are by axially extending bore
301 connect with outside.A pair of flashboard assembly 10 is separately mounted in first housing chamber 302, and a pair of slips is total
It is separately mounted into 20 in second housing chamber 303.The lower surface of the flashboard assembly 10 and first housing chamber 302 it
Between there is flying height.Can reducing friction resistance and rubber abrasion, be conducive to extend the service life of rubber parts；Closing well it
Afterwards, when having pressure in well, down-hole pressure can enter 10 back of flashboard assembly from flying height, under borehole pressure effect,
10 back of flashboard assembly and lower part produce a kind of thrust for helping envelope.The rear end of the flashboard assembly 10 and the slips assembly 20
Rear end is connected with the drive cylinder 40 respectively, and the drive cylinder 40 drives the corresponding flashboard assembly 10 and described respectively
Slips assembly 20 moves horizontally.The overall substantially rectangular tabular of flashboard assembly 10, can be under the drive of drive cylinder 40
Moved in first housing chamber 302 to tubing string center and away from tubing string center.Slips assembly 20 is overall to be also substantially rectangular tabular,
In the second housing chamber 303 to tubing string center and away from the movement of tubing string center under the drive of drive cylinder 40.
The front end of the flashboard body 101 is equipped with preceding sealing mounting groove, and 102 are sealed before the reducing and is inlaid in the preceding sealing
In mounting groove.Sealing 102 includes rubber body 1021, preceding envelope skeleton 1022 and floating parallels 1023 before reducing；Rubber body
1021 generally standard component, its two side portions are cuboid, and front end face is straight end face, and there be arc-shaped dash forward in the centre of rear end face
Go out, the shape of preceding sealing mounting groove is matched with rubber body 1021, is vulcanized between rubber body 1021 and flashboard body 101 and is connected to
Together.The front end of the flashboard body 101 is stretched out in the front end of sealing 102 before the reducing, and 101 thickness of flashboard body is close more than before reducing
The thickness of envelope 102, forms step shape.The upper surface of the flashboard body 101 is equipped with sealing mounting groove, described to seal in mounting groove
Embedded with flashboard top sealing 103, for the gap between 101 upper surface of sealing damper body and the first housing chamber 302.Envelope before described
Skeleton 1022 and the floating parallels 1023 are the metal material of sheet, and effect is when strengthening rubber body 1021 to seal
Supporting role.The floating parallels 1023 is made of to be semicircle, for example with two panels quadrant at least two panels parallels plate a
The parallels plate a compositions of arc are semicircle, and adjustment gap b is equipped with one end adjacent the parallels plate a of two panels quarter circular arc,
Parallels plate a is enough with that can be reserved when 1021 elastic deformation of rubber body moves to movement between adjacent two panels parallels plate a
Surplus.Using multi-disc parallels plate a structure similarly, repeat no more.The upper and lower surface of the rubber body 1021
The depression with preceding 1022 form fit of envelope skeleton is respectively equipped with, sealing skeleton 1022 before described is fitted to the corresponding depression
It is interior, sulfide with rubber body 1021 and flushed with the upper and lower surface of the rubber body 1021.In the rubber
Semicircle parallels mounting groove, the floating parallels are equipped between the upper surface of glue body 1021 and preceding envelope skeleton 1022 above
1023 in the parallels mounting groove, the upper surface of the floating parallels 1023 and the corresponding preceding envelope skeleton 1022
Lower surface contacts, and the lower surface of the floating parallels 1023 links together with the rubber body 1021 vulcanization.
The slips assembly 20 is located at the underface of the flashboard assembly 10, the translation direction of the slips assembly 20 and institute
The translation direction for stating flashboard assembly 10 is parallel.The front end of the slips assembly 20 is equipped with reducing arc notch 201, the reducing arc
V notch v 201 is made of the first segmental arc 2011 and the second segmental arc 2012；The both sides of first segmental arc 2011 connect successively
Connect second segmental arc 2012；I.e. the first segmental arc 2011 is located at the rear portion centre position of reducing arc notch 201, the second arc
Shape section 2012 is located at the front part sides position of reducing arc notch 201.The diameter of second segmental arc 2012 is more than described the
The diameter of one segmental arc 2011；Second segmental arc, the 2012 corresponding center of circle is corresponding relative to first segmental arc 2011
The center of circle produces eccentricity, forms eccentric bicircular arcs structure to the front-end offset of the slips assembly 20.
The drive cylinder 40 is equipped with four, connects respectively with the corresponding flashboard assembly 10 and the slips assembly 20
Connect.The drive cylinder 40 includes side door 401, piston 402, cylinder sleeve 403, cylinder cap 404, lock shaft 405；The side door 401 connects
The side of the housing 30 is connected on, one end of the cylinder sleeve 403 connects the side door 401, the other end connection of the cylinder sleeve 403
The cylinder cap 404；The 403 Inner Constitution cylindrical shape plunger shaft of cylinder sleeve, the piston 402 are located in the plunger shaft.It is described
Piston 402 is made of front and rear two parts, and the front portion of piston 402 is reduced diameter section, which stretches into
Into the first housing chamber 302 or the second housing chamber 303, connected with the rear end of corresponding flashboard assembly 10 or slips assembly 20；Lock
The rear end of plate body 101 and the rear end of slips assembly 20 are equipped with T-shaped link slot C, and the front end of the reduced diameter section is equipped with T-shaped connector
It is connected with T-shaped link slot C.The rear portion of piston 402 is enlarged diameter section, the enlarged diameter section and 403 inner wall sealing sliding contact of cylinder sleeve,
Plunger shaft is divided into the unlatching chamber 406 of front portion and the closing chamber 407 at rear portion.The rear end center of the piston 402 is equipped with connection
Chamber 408, the connecting cavity 408 are extended to inside reduced diameter section from enlarged diameter section, and the inner wall of the connecting cavity 408 is equipped with T
Shape internal thread；One end i.e. front end being connected on the lock shaft 405 with the piston 402 is equipped with T-shaped external screw thread, the lock shaft
405 are threadedly coupled with the connecting cavity 408 by T-shaped.And externally threaded length is more than the piston on the lock shaft 405
402 stroke in cylinder sleeve 403.Piston stroke refers to the piston 402 and moves axially to the side door 401 from the cylinder cap 404
The distance at place.Cylinder cap 404 described in 405 other end hermetically passing of lock shaft, the other end of lock shaft 405 reach cylinder cap
404 outside is simultaneously equipped with swivel 409.The lock shaft 405 is equipped with annular convex platform 410, and the annular convex platform 410 is located at
Behind external thread section, the inner side end of the cylinder cap 404 can be resisted against.Unlatching chamber 406 therein and closing chamber 407 lead to respectively
Asphalt channel is crossed to be connected with high-pressure oil pump.
The drive cylinder 40 driving flashboard assembly 10 and the process of the action of slips assembly 20 are：It is assumed that original state flashboard is total
Full opening of position is respectively positioned on into 10 and slips assembly 20, piston 402 is located at the rightmost side of plunger shaft, lock shaft 405 at this time
The high order end being screwed into connecting cavity 408.High pressure oil is driven into and closes chamber 407, promotes piston 402 to be moved to the left to maximum row
Journey, i.e., move to well head center position, and piston 402 promotes flashboard assembly 10 or slips assembly 20 to be moved to fully closed position
(20 synchronization action of flashboard assembly 10 or slips assembly of opposite side), realizes shut-in well.Then the swivel of lock shaft 405 is passed through
409 rotation lock shafts 405, making lock shaft 405, connecting cavity 408 is exited in movement to the right, until annular convex platform 410 is resisted against cylinder cap
404 inner side end, at this time lock shaft 405 by 402 positioning and locking of piston in the closed position of the leftmost side.When need open flashboard
When assembly 10 or slips assembly 20, lock shaft 405 is first rotated, lock shaft 405 is manoeuvred into the left in connecting cavity 408 directly
To high order end.Then high pressure oil is driven into and opens chamber 406, promote piston 402 to move right to range, i.e., to away from well
The direction movement at mouth center, piston 402 drives flashboard assembly 10 or slips assembly 20 is moved to fully open position, opens well
Mouthful.
It can be seen from the above description that flashboard assembly 10 of the reducing blowout hookup 100 of the present invention using reducing, flashboard
Sealing 102 can be produced when compressed backward using the floating parallels 1023 that is connected with rubber body 1021 before the reducing of assembly 10
The principle of raw elastic deformation, when sealing small-size diameter string, utilizes the small straight of 1021 front end of floating parallels 1023 and rubber body
Footpath semicircular indentations are sealed；When sealing major diameter tubing string, floating parallels 1023 and rubber body 1021 are compressed by tubing string
It is deformed being moved rearwards, is sealed using the major diameter semicircular indentations of preceding 1022 front end of envelope skeleton.In slips assembly 20
Front end using eccentric Gothic into reducing arc notch 201, be adapted to the clamping of two kinds of different diameter specifications tubing strings
Demand.10 lower part of flashboard assembly and housing chamber have certain flying height, can reducing friction resistance and rubber abrasion, be conducive to
Extend the service life of rubber parts；When having pressure after closing well, in well, down-hole pressure can enter flashboard assembly from flying height
10 backs, under borehole pressure effect, a kind of thrust for helping envelope is produced at 10 back of flashboard assembly and lower part.20 He of slips assembly
Flashboard assembly 10 can be used alone, and also can be combined and uses, can seal and clamp at the same time the tubing string of two kinds of diameter specifications, it is not necessary to scene
Flashboard and slips are replaced, it is easy to use.
The foregoing is merely the schematical embodiment of the present invention, the scope of the present invention is not limited to.It is any
Those skilled in the art, made equivalent variations and modification on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention should be belonged to.
Claims (11)
1. a kind of reducing blowout hookup for controllable snubbing serving, the reducing blowout hookup includes a pair of of front end and sets relatively
The flashboard assembly put；It is characterized in that, the flashboard assembly seals before including flashboard body and reducing；The flashboard body and the change
Sealing is tabular before footpath, and the front end for being fixed at the flashboard body is sealed before the reducing；
Sealing includes rubber body, preceding envelope skeleton and floating parallels before the reducing；The rubber body, it is described before envelope skeleton and
The front end of the floating parallels is concordant；The rubber body is fixedly connected with the flashboard body, and the front end of the rubber body is set
There are the first semicircular indentations；Sealing includes two preceding envelope skeletons before the reducing, and two preceding envelope skeletons are fixed respectively
In the upper and lower surface of the rubber body；The front end of envelope skeleton is equipped with concentric with first semicircular indentations before described
The second semicircular indentations, and the diameter of second semicircular indentations be more than first semicircular indentations diameter；It is described
Float cushion iron clamp is located between the rubber body upper surface and the corresponding preceding envelope skeleton；The floating parallels and the rubber
Glue body is fixedly connected and can relatively described preceding envelope skeleton translation gliding；The front end of the floating parallels is equipped with and described the first half
The 3rd semicircular indentations that circumferential notch is concentric and diameter is identical.
2. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 1, it is characterised in that envelope bone before described
Frame and the floating parallels are sheet, and the floating parallels is made of as semicircle, adjacent two panels pad at least two panels parallels plate
Adjustment gap is equipped between iron plate.
3. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 2, it is characterised in that the rubber sheet
The upper and lower surface of body is respectively equipped with the depression coordinated with the preceding envelope frame configuration, and skeleton is sealed before described fitted to correspondence
The depression in, flushed with the upper and lower surface of the rubber body；The upper surface of the rubber body with it is described before
Seal between skeleton equipped with semicircle parallels mounting groove, the floating parallels is in the parallels mounting groove, the float cushion
The upper surface of iron is contacted with the lower surface of the corresponding preceding envelope skeleton, lower surface and the rubber body of the floating parallels
It is fixedly connected.
4. being used for the reducing blowout hookup of controllable snubbing serving as claimed any one in claims 1 to 3, its feature exists
In the front end of the flashboard body is equipped with preceding sealing mounting groove, seals and is inlaid in the preceding sealing mounting groove before the reducing, institute
State the front end that the flashboard body is stretched out in the front end sealed before reducing；The upper surface of the flashboard body is equipped with sealing mounting groove, described
Seal in mounting groove and sealed embedded with flashboard top.
5. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 1, it is characterised in that the reducing is prevented
Spray apparatus further includes the slips assembly that a pair of of front end is oppositely arranged, and the slips assembly is arranged on the lower section of the flashboard assembly；
The front end of the slips assembly is equipped with reducing arc notch, and the reducing arc notch is by the first segmental arc and the second segmental arc group
Into；The both sides of first segmental arc are sequentially connected second segmental arc；The diameter of second segmental arc is more than described the
The diameter of one segmental arc.
6. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 5, it is characterised in that second arc
The corresponding center of circle of shape section forms eccentricity relative to the corresponding center of circle of first segmental arc to the front end of the slips assembly.
7. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 5, it is characterised in that the reducing is prevented
Spray apparatus further includes housing and drive cylinder, and the center of the housing is equipped with the axially extending bore of up/down perforation；The housing is symmetrical
The first housing chamber positioned at upper strata and the second housing chamber positioned at lower floor are respectively equipped with the side wall of both sides；A pair of flashboard
Assembly is separately mounted in first housing chamber, and a pair of slips assembly is separately mounted in second housing chamber；Institute
State the rear end of flashboard assembly and the rear end of the slips assembly to be connected with the drive cylinder respectively, the drive cylinder is driven respectively
Move the corresponding flashboard assembly and the slips assembly moves horizontally.
8. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 7, it is characterised in that the driving oil
Cylinder is equipped with four, is connected respectively with the corresponding flashboard assembly and the slips assembly；The slips assembly is located at the lock
The underface of plate assembly, the translation direction of the slips assembly are parallel with the translation direction of the flashboard assembly.
9. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 7, it is characterised in that the flashboard is total
Into lower surface and first housing chamber between there is flying height.
10. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 7, it is characterised in that the driving
Oil cylinder includes side door, piston, cylinder sleeve, cylinder cap, lock shaft；The side door is connected to the side of the housing, and the one of the cylinder sleeve
End connects the side door, and the other end of the cylinder sleeve connects the cylinder cap；The cylinder sleeve Inner Constitution cylindrical shape plunger shaft, it is described
Piston is located in the plunger shaft；One end of the piston is fixedly connected with the flashboard assembly or the slips assembly, the work
The other end of plug connects the lock shaft.
11. it is used for the reducing blowout hookup of controllable snubbing serving as claimed in claim 10, it is characterised in that the piston
Interior to be equipped with connecting cavity, the inner wall of the connecting cavity is equipped with internal thread；The lock shaft is equipped with one end that the piston is connected
External screw thread, the lock shaft are threadedly coupled with the connecting cavity, and externally threaded length is more than the piston on the lock shaft
Stroke；Cylinder cap described in the lock shaft other end hermetically passing, the lock shaft are equipped with annular convex platform, the annular convex platform
The inner side end of the cylinder cap can be resisted against.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300974.0A CN105781473B (en) | 2016-05-09 | 2016-05-09 | Reducing blowout hookup for controllable snubbing serving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300974.0A CN105781473B (en) | 2016-05-09 | 2016-05-09 | Reducing blowout hookup for controllable snubbing serving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105781473A CN105781473A (en) | 2016-07-20 |
| CN105781473B true CN105781473B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610300974.0A Active CN105781473B (en) | 2016-05-09 | 2016-05-09 | Reducing blowout hookup for controllable snubbing serving |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590562B (en) * | 2018-03-16 | 2020-04-10 | 中国石油天然气股份有限公司 | Device for wellhead pressure conversion and sealing |
| BR112020019987A2 (en) * | 2018-04-10 | 2021-01-26 | Hydril USA Distribution LLC | steel cable shear blind drawer |
| CN109520673B (en) * | 2018-10-30 | 2021-09-07 | 中国石油集团渤海钻探工程有限公司 | Pressure test clamping tool and pressure test method for variable-diameter flashboard of blowout preventer |
| US11459844B2 (en) * | 2019-08-27 | 2022-10-04 | Hydril USA Distribution LLC | Blowout preventer system and method |
| CN112483036B (en) * | 2020-12-14 | 2021-10-01 | 盐城市大冈石油工具厂有限责任公司 | Barrier-free circulating operation blowout preventer |
| CN117072107B (en) * | 2023-10-16 | 2024-01-26 | 盐城市佳鑫石化机械制造有限公司 | Blowout preventer for oil well construction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2773303Y (en) * | 2005-03-30 | 2006-04-19 | 上海神开石油化工设备有限公司 | Flashboard blowout preventer for petroleum and natural gas drilling well |
| CN2869299Y (en) * | 2005-11-22 | 2007-02-14 | 盐城市大冈石油工具厂 | Multifunctional blow-out preventer |
| US7338027B1 (en) * | 2006-08-22 | 2008-03-04 | Cameron International Corporation | Fluid saving blowout preventer operator system |
| CN103206185A (en) * | 2013-04-24 | 2013-07-17 | 衡水亿德橡塑制品有限公司 | Blowout preventer ram |
| CN104563943A (en) * | 2013-10-28 | 2015-04-29 | 江苏贵鑫石油装备有限公司 | Reducing sealing type hydraulic-driving flashboard blowout preventer |
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2016
- 2016-05-09 CN CN201610300974.0A patent/CN105781473B/en active Active
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| CN105781473A (en) | 2016-07-20 |
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