CN203891797U - Reducing slip of blowout preventer - Google Patents

Abstract

The utility model discloses a reducing slip of a blowout preventer. The reducing slip comprises an opening structure and a female buckle structure, which are positioned at the front part and the rear part of the reducing slip of the blowout preventer respectively, wherein inner walls of the opening structure comprise three circular arc-shaped inner walls, namely a middle inner wall and two side inner walls; the two side inner walls are positioned on two sides of the middle inner wall respectively; three groups of slip insert structures, namely a middle slip insert structure and two side slip insert structures, are arranged on the surface layers of the inner walls of the opening structure; the inner diameter of the inner circumference of a slip insert of each side slip insert structure is greater than that of the inner circumference of a slip insert of the middle slip insert structure; the side inner walls and the middle inner wall of the opening structure are correspondingly matched with thick and thin cylindrical pipe columns. The reducing slips of the blowout preventer, namely a female reducing slip of the blowout preventer and a male reducing slip of the blowout preventer, are paired. The reducing slip of the blowout preventer has two inner diameter specifications so as to be suitable for clamping the thick and thin cylindrical pipe columns, and is simple in structure.

Description

The slips of the reducing of preventer

Technical field

The utility model relates to parts---the slips of the reducing of flashboard slips, especially preventer of the hydraulic flashboard slips binding clasp using in a kind of oil gas field shaft mouth operation.

Background technology

Hydraulic flashboard slips binding clasp is the utensil of the clamping tubing string that uses in oil gas field shaft mouth operation, at present, general tubing string clamping device adopts hydraulic-driven, be referred to as fluid pressure type tubing string binding clasp, when playing lower tubular column, fluid pressure type tubing string binding clasp can be realized the tubing string clamping in oil well well, and the tubing string in oil well is generally oil pipe, fluid pressure type tubing string binding clasp consists of housing, hydraulic cylinder, flashboard slips, side door, side door bolt, port connection, and fluid pressure type tubing string binding clasp also comprises sealing mechanism, fluid pressure type tubing string binding clasp is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, the center of its housing is the main through hole of circular configuration, on housing, there are two flange arrangements, the main through hole two ends that are housing are fixedly connected with respectively flange arrangement, the center line of flange arrangement and the center line of main through hole are on same straight line, housing has two side through hole, and two side through hole communicate with main through hole respectively, and a side through hole is positioned at main through hole one side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on same straight line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on a side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as top plane, top plane is vertical with the center line of piston, the two sides that are connected with top plane are that plane is side plane, its two side plane is vertical with top plane respectively, and be parallel to each other, the vertical distance that its minute is clipped to the center line of piston equates, between side plane and piston rod main body, fluted structure is connected, groove structure open at both ends, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and vertical with groove bottom, the top plane parallel of groove side and piston rod, the blind hole that has connection wire rod on piston rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston is on same straight line, in the blind hole of the central through hole of piston and the connection wire rod linking together, there is internal thread, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, on the leading portion of body, there is male thread.Flashboard slips is the shape and structure of block, on flashboard slips external surface, there are two outerplanars that are parallel to each other that relative arc outer wall face is relative with two, arc outer wall face intersects and is connected with two outerplanars respectively, outerplanar is vertical with the middle tangent plane of flashboard slips, two outerplanar, one is upper plane, and another is baseplane.Flashboard slips comprises hatch frame, box structure, and hatch frame, box structure lay respectively at the front and rear of flashboard slips.Hatch frame is positioned at the front portion of flashboard slips, hatch frame refers to the opening of circular arc of the anterior centre of flashboard slips, the top layer of the inwall of the circular arc of its hatch frame is slip insert structure, slip insert structure is to be arranged to form by several slip inserts, slip insert is the pincers tooth of arc, the interior week of each slip insert, at grade, its arc core line was vertical with the outerplanar of flashboard slips for the arc core line of hatch frame and the middle tangent plane of flashboard slips on same affiliated circular arc side face; Because there is hatch frame the front portion of flashboard slips, just there are two fronts the front portion of its flashboard slips, two fronts lay respectively at symmetrically flashboard slips the both sides of middle tangent plane.The front portion of flashboard slips comprises two fronts, box structure is positioned at the rear portion of flashboard slips, and box structure is convex slot, and it consists of inside groove and water jacket, horizontal break-through flashboard slips, and its groove bottom is plane, and convex slot comprises inside groove and water jacket, and the width of its inside groove is greater than the width of water jacket, the pin thread structure of the outer end of the piston rod of its box structure and hydraulic pressure gate slips binding clasp cooperatively interacts, vertical distance between two groove sides of water jacket is identical with the vertical distance between two groove bottom of two groove structures at the top of the pin thread structure of the outer end of piston rod, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of box structure, the pin thread structure top plane of the outer end of piston rod is identical with the degree of depth of the inside groove of box structure to the vertical distance of groove side adjacent with top plane of groove structure, vertical distance between two groove sides of the vertical distance between two side planes of the pin thread structure of the outer end of piston rod and the inside groove of the convex slot of box structure equates, like this, piston rod packs in the hole in the middle of side door, the pin thread structure of piston rod injects in the box structure on slip spider and mutually coincide, piston and piston rod are inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises sealing and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel between the back segment of body of cylinder cap and screw mandrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is that sealed well is pressed, a part is the oil pressure that sealing hydraulic control produces, between twice sealing mechanism Zhe Liang department, for making the sealing at this place very reliable, the sealing ring that has multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at the side through hole outside of housing, cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, common slips assembly is installed and connected in the side through hole of housing, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal, the sealing mechanism of fluid pressure type tubing string binding clasp comprises sealing device and the sealing between side door and housing and the sealing of oil circuit of hydraulic cylinder, in the body of housing, there are two oil circuit holes, one oil circuit hole collar extension of its housing is positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, another oil circuit hole collar extension of its housing is also positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, in cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from the cylinder cap inner side all sides that are connected corresponding to cylinder barrel in its oil circuit hole, and passes in the middle of cylinder cap inner side, cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in all side oil circuit apertures in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, oil circuit aperture in the middle of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there are two oil circuit holes of crossing side door, the two oil circuit apertures in an oil circuit hole of side door interlink with another oil circuit aperture in oil circuit hole and an oil circuit hole sealing of housing of cylinder barrel respectively, and another oil circuit hole sealing of another oil circuit hole of side door and housing interlinks and leads in cylinder barrel, its each parts are successively installed and have been connected according to program respectively, all have rubber seal to connect between each interface in its each oil circuit hole, and it forms the oil circuit of independent completion sealing.The sealing of the sealing between each interface of hole, sealed packet oil scraper road of oil circuit and the oil circuit hole collar extension of port connection and housing, two flashboard slips are located opposite from respectively in the left and right side through hole of housing, and two relative flashboard slips forms one group of common slips assembly, the be tightly connected defeated tubing string of hydraulic pressure of hydraulic system of port connection, when hydraulic control system hydraulic oil enters left and right cylinder barrel and closes chamber, promotion piston driving left and light brake plate slips moves to well head center respectively along the side through hole of housing, realize and clamp tubing string, when hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston driving left and light brake plate slips to leaving the motion of well head center position, unclamp tubing string, flashboard slips switch is controlled by the reversal valve of the hydraulic control unit of hydraulic system, at present, the flashboard slips of the hydraulic flashboard slips binding clasp that oil well is used is single size slips assembly, a kind of flashboard slips of size can only clamp the tubing string of corresponding a kind of size, that is to say that flashboard slips only has an internal diameter specification, one group of flashboard slips can only adapt and mate with a kind of tubing string of external diameter specification, and oil well tubing string used is all combined string mostly, while using hydraulic flashboard slips binding clasp to clamp tubing string, needs that will be different according to the external diameter specification of tubing string, use and the adapt flashboard slips of the different internal diameter specification of mating of the external diameter specification of its tubing string, therefore need to be equipped with the flashboard slips of different size, thereby satisfy the demand by changing flashboard slips, to adapt to the variation of external diameter specification of the tubing string of required clamping, so not only when operation, increase workload, and there is potential safety hazard, or, the many groups of its hydraulic flashboard slips binding clasp equipment flashboard slips, it is different that it respectively organizes flashboard slips specification, thereby adapt to the variation of the external diameter specification of tubing string, and the tubing string clamping device device structure of this many group flashboard slips repeats, volume greatly, high, the complicated operation of highly high, Heavy Weight, cost, so existing flashboard slips can not meet the required requirement of well workover.

Utility model content

The purpose of this utility model is: the slips that a kind of reducing of preventer is provided, the inwall of the hatch frame of the slips of the reducing of preventer comprises the inwall of three circular arcs, be intermediate inner wall and two side inwalls, two side inwalls intersect and are connected with intermediate inner wall respectively, Corresponding matching is thick respectively for its side inwall and intermediate inner wall, the columniform tubing string of thin two kinds of specifications, thereby the slips of the reducing of preventer has overcome the internal diameter specification of only having of flashboard slips, one group of defect that flashboard slips can only adapt and mate with a kind of tubing string of external diameter specification, the slips of the reducing of preventer comprises two internal diameter specifications, the internal diameter specification of the slips of the reducing of preventer refers to the specification of internal diameter in interior week of slip insert of slips structure of slips of the reducing of preventer, adapt the respectively tubing string of column type of two kinds of different external diameter specifications of coupling of two different internal diameter specification, thereby, it is thick that the slips of the reducing of its preventer adapts to clamping, the tubing string of the column type of thin two kinds of specifications, save the working time like this, save and change the trouble that flashboard slips brings, greatly improved workman's labor productivity, stop to produce new potential safety hazard.

The purpose of this utility model is achieved in that the slips of the reducing of preventer is the parts of the hydraulic flashboard slips binding clasp that uses in a kind of oil gas field shaft mouth operation.The slips of the reducing of preventer is the shape and structure of block, on the slips external surface of the reducing of preventer, there are two outerplanars that are parallel to each other that relative arc outer wall face is relative with two, arc outer wall face intersects and is connected with two outerplanars respectively, outerplanar is vertical with the middle tangent plane of the slips of the reducing of preventer, two outerplanar, one is upper plane, and another is baseplane.The slips of the reducing of preventer comprises hatch frame, box structure, and hatch frame, box structure lay respectively at the front and rear of slips of the reducing of preventer.Box structure is positioned at the rear portion of slips of the reducing of preventer, and box structure is convex slot, and it consists of inside groove and water jacket, the slips of the reducing of horizontal break-through preventer, its groove bottom is plane, and convex slot comprises inside groove and water jacket, and the width of its inside groove is greater than the width of water jacket.Hatch frame is positioned at the front portion of slips of the reducing of preventer, hatch frame refers to the opening of anterior centre of slips of the reducing of preventer, the inwall of its hatch frame comprises the inwall of three circular arcs, be intermediate inner wall and two side inwalls, two side inwalls intersect and are connected with intermediate inner wall respectively, two side inwalls lay respectively at intermediate inner wall both sides, between its intermediate inner wall between two side inwalls, the inwall of its hatch frame is the combining structure of two side inwalls and an intermediate inner wall, the top layer of the inwall of its hatch frame is slip insert structure, slip insert structure is to be arranged to form by several slip inserts, slip insert is the pincers tooth of arc, the slip insert structure of the slips of the reducing of its preventer comprises three groups of slip insert structures, be positioned at the slip insert structure on the top layer of intermediate inner wall, it is referred to as middle slips dental structure, be positioned at the slip insert structure on the top layer of side inwall, it is referred to as side slip insert structure, side slip insert structure has two, slips dental structure both sides in the middle of two side slip insert structures lay respectively at, be in the middle of it between slip insert structure between two side slip insert structures, the interior week of each slip insert of middle slips dental structure is on same affiliated circular arc side face, the interior week of each slip insert of side slip insert structure is on same affiliated circular arc side face, the internal diameter in the interior week of the slip insert of slips dental structure in the middle of the internal diameter in the interior week of the slip insert of side slip insert structure is greater than, it is the internal diameter of the affiliated circular arc side face in the interior week of the slip insert of slips dental structure in the middle of the internal diameter of affiliated circular arc side face in interior week of the slip insert of side slip insert structure is greater than, the affiliated circular arc side face in the interior week of the slip insert of two side slip insert structures and the arc core line of two side inwalls are same straight line, the arc core line of the affiliated circular arc side face in the interior week of the slip insert of intermediate inner wall and middle slips dental structure is same straight line, two arc core lines are parallel to each other, and respectively with the middle tangent plane of the slips of the reducing of preventer at grade, two arc core line is vertical with the outerplanar of the slips of the reducing of preventer respectively, the arc core line of side inwall is positioned at the place ahead of the arc core line of intermediate inner wall.Its side inwall and intermediate inner wall be the columniform tubing string of thick, the thin two kinds of specifications of Corresponding matching respectively, it is the columniform tubing string that side inwall is corresponding thick, the columniform tubing string that intermediate inner wall is corresponding thin, thick columniform tubing string is large diameter columniform tubing string, the columniform tubing string of thin columniform tubing string minor diameter.Because there is hatch frame the front portion of the slips of the reducing of preventer, the front portion of the slips of the reducing of preventer comprises two fronts, two fronts lay respectively at symmetrically preventer reducing slips the both sides of middle tangent plane.The complete pairing of slips of the reducing of preventer, the slips of the reducing of a set of preventer has the slips of the reducing of two preventers, the slips of the reducing of two preventers complements one another into the slips of the reducing of a set of preventer, in the slips of the reducing of two preventers of the slips of the reducing of same set of preventer, the fluted structure in front of the slips of the reducing of an one preventer, there is male head structure the front of the slips of the reducing of another preventer; The slips of the reducing of the preventer of its fluted structure is referred to as the slips of the reducing of female preventer, and it has the slips of reducing of the preventer of male head structure to be referred to as the slips of the reducing of public preventer.The fluted structure in front of the slips of the reducing of female preventer, groove structure comprises two grooves, three opening sheets, be on the top of front, to have the groove of two horizontal openings, its groove comprises groove bottom and groove side, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of female preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of female preventer, like this, on the top of its front, just form three apart from one another by the structure of opening sheet, its opening sheet of three is respectively upper shed sheet, split shed sheet, bottom opening sheet, the inwall of the opening sheet of three is all a part for side inwall.There is male head structure the front of the slips of the reducing of public preventer, and male head structure comprises two males, groove, two unfilled corners, on the top of its front, have two horizontal apart from one another by outstanding male, between two male and end face, form groove, its groove comprises groove bottom and groove side, two relative Wei Cao sides, side of two males, groove bottom is for connecting the part that is sandwiched in two end faces between groove side of two groove sides, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of public preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of public preventer, between the lateral surface of male and end face, mutually intersect vertically and form the unfilled corner in outside, lateral surface and groove side are parallel to each other, the male of two is respectively male, lower male, the inwall of two males is all a part for side inwall, thereby, on the top of its front, just form two apart from one another by the structure of male, two unfilled corner is respectively unfilled corner and end unfilled corner.When the slips of the reducing of the slips of the reducing of female preventer and male preventer docks mutually, the slips of the reducing of the slips of the reducing of female preventer and male preventer complements each other to form a unified overall structure, in the slips of the reducing of two preventers of the slips of the reducing of a set of preventer, the male head structure of the front of the slips of the reducing of male preventer cooperatively interacts and is connected with the groove structure of the front of the slips of the reducing of female preventer, two males of male head structure of slips of the reducing of male preventer are injected respectively in two grooves of groove structure of slips of reducing of female preventer of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of the slips of the reducing of female preventer, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of slips of reducing of the public preventer of mutual correspondence, groove, in end unfilled corner, mutually coincide.Like this, when the slips of the reducing of the slips of the reducing of the male preventer of the slips of the reducing of a set of preventer and female preventer is equipped on hydraulic flashboard slips binding clasp, be that the slips of reducing of male preventer and the slips of the reducing of female preventer are installed respectively in two side through hole of a pair of side through hole of housing of hydraulic flashboard slips binding clasp, a same a pair of left side at housing, the slips of the reducing of the male flashboard slips in the through hole of right side and female preventer complements one another, relative between two, and in the through hole of the same side, the box structure of the slips of the reducing of the pin thread structure reeve preventer of the piston rod that it is corresponding is interior and mutually identical, the slips of the reducing of the preventer that two complements one another is the slips of the reducing of a set of preventer, the be tightly connected hydraulic oil pipeline of hydraulic system of the port connection of hydraulic flashboard slips binding clasp, when the left and right cylinder barrel that enters the slips of the reducing of controlling preventer when hydraulic control system hydraulic oil is closed chamber, the slips of the reducing of promotion piston-advance and drive left and right preventer moves to well head center respectively along the side through hole of housing, the slips of the reducing of two preventers docks mutually, and the slips of the reducing of two preventers is in conjunction with the tubing string of clamp cylinders shape, when clamped tubing string is large diameter columniform tubing string, the slip insert of the side slip insert structure of the side inwall of the slips of the reducing of the slips of the reducing of the preventer that it is male and female preventer touches the surface of large diameter columniform tubing string, because the internal diameter of the slip insert of the side slip insert structure of side inwall is greater than the internal diameter of slip insert of the side slip insert structure of intermediate inner wall, the external diameter of large diameter columniform tubing string is greater than the internal diameter of slip insert of the middle slips dental structure of intermediate inner wall, thereby the slip insert of the middle slips dental structure of intermediate inner wall can not touch the surface of large diameter columniform tubing string, thrust due to piston forward, make to have produced mutual thrust (along tubing string radial direction) between the slips of reducing of male preventer and the slips of the reducing of female preventer, thereby make the slips of reducing of male preventer and the large diameter columniform tubing string of the stressed clamping of slips of the reducing of female preventer.Equally, when columniform tubing string that clamped tubing string is minor diameter, the slip insert of the side slip insert structure of the intermediate inner wall of the slips of the reducing of the slips of the reducing of the preventer that it is male and female preventer touches the surface of the columniform tubing string of minor diameter, because the internal diameter of the slip insert of the side slip insert structure of side inwall is greater than the internal diameter of slip insert of the side slip insert structure of intermediate inner wall, the external diameter of the columniform tubing string of minor diameter is less than the internal diameter of slip insert of the side slip insert structure of side inwall, thereby each slip insert of the side slip insert structure of side inwall can not touch the surface of the columniform tubing string of minor diameter, the male head structure of the front of the slips of the reducing of male preventer cooperatively interacts and is connected with the groove structure of the front of the slips of the reducing of female preventer, two males of male head structure of slips of the reducing of male preventer are injected respectively in two grooves of groove structure of slips of reducing of female preventer of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of the slips of the reducing of female preventer, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of slips of reducing of the public preventer of mutual correspondence, groove, in end unfilled corner, mutually coincide, thrust due to piston forward, make to have produced mutual thrust (along tubing string radial direction) between the slips of reducing of male preventer and the slips of the reducing of female preventer, thereby make the slips of reducing of male preventer and the large diameter columniform tubing string of the stressed clamping of slips of the reducing of female preventer.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the slips of the reducing of preventer to move to leaving well head center position, unclamp columniform tubing string.The slips switch of the reducing of preventer is controlled by the reversal valve of the hydraulic control unit of hydraulic system.Like this, the slips of the reducing by one group preventer just can clamp two kinds of tubing strings of the tubing string different specification size of large diameter tubing string and minor diameter, realizes reducing clamping, thereby reaches the purpose of this utility model.

Owing to having adopted technique scheme, the slips of the reducing of preventer not only its overcome flashboard slips only have an internal diameter specification, one group of defect that flashboard slips can only adapt and mate with a kind of tubing string of external diameter specification, the slips of the reducing of preventer comprises two internal diameter specifications, adapt the respectively tubing string of column type of two kinds of different external diameter specifications of coupling of two different internal diameter specification, thereby, the slips of the reducing of its preventer adapts to the tubing string of the column type that clamps thick, thin two kinds of specifications, and simple in structure.

Accompanying drawing explanation

Below in conjunction with embodiment, the slips of the reducing of the utility model preventer is further described.

Accompanying drawing 1 is the structural representation of slips of reducing of female preventer of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 2 is the structural representation of slips of reducing of public preventer of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 3 is the front view of three-view diagram of public variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 4 is the lateral view of three-view diagram of public variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 5 is the top view of three-view diagram of public variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 6 is the lateral view of three-view diagram of female variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 7 is the front view of three-view diagram of female variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

Accompanying drawing 8 is the top view of three-view diagram of female variable bore ram slips of embodiment of slips of the reducing of the utility model preventer.

The slips of the reducing of the preventer of the embodiment of the slips of the reducing that accompanying drawing 9 is the utility model preventer clamps the principle analysis diagram of large tubing string.

The slips of the reducing of the preventer of the embodiment of the slips of the reducing that accompanying drawing 10 is the utility model preventer clamps the principle analysis diagram of little tubing string.

In figure: 1, large diameter columniform tubing string 2, the columniform tubing string 3 of minor diameter, intermediate inner wall 4, side inwall 5, box structure 6, groove structure 7, the groove 8 of the horizontal opening of groove structure, upper shed sheet 9, split shed sheet 10, bottom opening sheet 11, end unfilled corner 12, male head structure 13, the groove 14 forming between two males of male head structure and end face, lower male 15, upper unfilled corner 16, the slips 17 of the reducing of preventer, upper male 18, the slips 19 of the reducing of female preventer, the slips 20 of the reducing of public preventer, the front 21 of the slips of the reducing of female preventer, the front of the slips of the reducing of public preventer

The specific embodiment

In figure: the shape and structure that the slips of the reducing of preventer is block, on the slips of the reducing of preventer (16) external surface, there are two outerplanars that are parallel to each other that relative arc outer wall face is relative with two, arc outer wall face intersects and is connected with two outerplanars respectively, outerplanar is vertical with the middle tangent plane of the slips of the reducing of preventer, two outerplanar, one is upper plane, and another is baseplane.The slips of the reducing of preventer comprises hatch frame, box structure (5), and hatch frame, box structure lay respectively at the front and rear of slips of the reducing of preventer.Box structure is positioned at the rear portion of slips of the reducing of preventer, and box structure is convex slot, and it consists of inside groove and water jacket, the slips of the reducing of horizontal break-through preventer, its groove bottom is plane, and convex slot comprises inside groove and water jacket, and the width of its inside groove is greater than the width of water jacket.Hatch frame is positioned at the front portion of slips of the reducing of preventer, hatch frame refers to the opening of anterior centre of slips of the reducing of preventer, the inwall of its hatch frame comprises the inwall of three circular arcs, be intermediate inner wall (3) and two side inwalls, two side inwalls intersect and are connected with intermediate inner wall respectively, two side inwalls lay respectively at intermediate inner wall both sides, be between its intermediate inner wall between two side inwalls, the inwall of its hatch frame is the combining structure of two side inwalls and an intermediate inner wall, the top layer of the inwall of its hatch frame is slip insert structure, slip insert structure is to be arranged to form by several slip inserts, slip insert is the pincers tooth of arc, the slip insert structure of the slips of the reducing of its preventer comprises three groups of slip insert structures, be positioned at the slip insert structure on the top layer of intermediate inner wall, it is referred to as middle slips dental structure, be positioned at the slip insert structure on the top layer of side inwall (4), it is referred to as side slip insert structure, side slip insert structure has two, slips dental structure both sides in the middle of two side slip insert structures lay respectively at, be in the middle of it between slip insert structure between two side slip insert structures, the interior week of each slip insert of middle slips dental structure is on same affiliated circular arc side face, the interior week of each slip insert of side slip insert structure is on same affiliated circular arc side face, the internal diameter in the interior week of the slip insert of slips dental structure in the middle of the internal diameter in the interior week of the slip insert of side slip insert structure is greater than, it is the internal diameter of the affiliated circular arc side face in the interior week of the slip insert of slips dental structure in the middle of the internal diameter of affiliated circular arc side face in interior week of the slip insert of side slip insert structure is greater than, the affiliated circular arc side face in the interior week of the slip insert of two side slip insert structures and the arc core line of two side inwalls are same straight line, the arc core line of the affiliated circular arc side face in the interior week of the slip insert of intermediate inner wall and middle slips dental structure is same straight line, two arc core lines are parallel to each other, and respectively with the middle tangent plane of the slips of the reducing of preventer at grade, two arc core line is vertical with the outerplanar of the slips of the reducing of preventer respectively, the arc core line of side inwall is positioned at the place ahead of the arc core line of intermediate inner wall.Its side inwall and intermediate inner wall be the columniform tubing string of thick, the thin two kinds of specifications of Corresponding matching respectively, it is the corresponding thin columniform tubing string of columniform tubing string, intermediate inner wall that side inwall is corresponding thick, thick columniform tubing string is large diameter columniform tubing string, the columniform tubing string of thin columniform tubing string minor diameter.Because there is hatch frame the front portion of the slips of the reducing of preventer, the front portion of the slips of the reducing of preventer comprises two fronts, two fronts lay respectively at symmetrically preventer reducing slips the both sides of middle tangent plane.The complete pairing of slips of the reducing of preventer, the slips of the reducing of a set of preventer has the slips of the reducing of two preventers, the slips of the reducing of two preventers complements one another into the slips of the reducing of a set of preventer, in the slips of the reducing of two preventers of the slips of the reducing of same set of preventer, the fluted structure in front of the slips of the reducing of an one preventer, there is male head structure the front of the slips of the reducing of another preventer; The slips of the reducing of the preventer of its fluted structure is referred to as the slips (18) of the reducing of female preventer, and it has the slips of reducing of the preventer of male head structure to be referred to as the slips (19) of the reducing of public preventer.The fluted structure in front (20) of the slips of the reducing of female preventer, groove structure (6) comprises two grooves, three opening sheets, be on the top of front, to have the groove of two horizontal openings, its groove (7) comprises groove bottom and groove side, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of female preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of female preventer, like this, on the top of its front, just form three apart from one another by the structure of opening sheet, its opening sheet of three is respectively upper shed sheet (8), split shed sheet (9), bottom opening sheet (10), the inwall of the opening sheet of three is all a part for side inwall.There is male head structure the front (21) of the slips of the reducing of public preventer, and male head structure (12) comprises two males, groove, two unfilled corners, on the top of its front, have two horizontal apart from one another by outstanding male, between two male and end face, form groove, its groove (13) comprises groove bottom and groove side, two relative Wei Cao sides, side of two males, groove bottom is for connecting the part that is sandwiched in two end faces between groove side of two groove sides, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of public preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of public preventer, between the lateral surface of male and end face, mutually intersect vertically and form the unfilled corner in outside, lateral surface and groove side are parallel to each other, the male of two is respectively male (17), lower male (14), the inwall of two males is all a part for side inwall, thereby, on the top of its front, just form two apart from one another by the structure of male, two unfilled corner is respectively unfilled corner (15) and end unfilled corner (11).When the slips of the reducing of the slips of the reducing of female preventer and male preventer docks mutually, the slips of the reducing of the slips of the reducing of female preventer and male preventer complements each other to form a unified overall structure, in the slips of the reducing of two preventers of the slips of the reducing of a set of preventer, the male head structure of the front of the slips of the reducing of male preventer cooperatively interacts and is connected with the groove structure of the front of the slips of the reducing of female preventer, two males of male head structure of slips of the reducing of male preventer are injected respectively in two grooves of groove structure of slips of reducing of female preventer of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of the slips of the reducing of female preventer, split shed sheet, bottom opening sheet divides the another reeve upper unfilled corner of the slips of the reducing of corresponding public preventer mutually, groove, in end unfilled corner, mutually coincide.Like this, when the slips of the reducing of the slips of the reducing of the male preventer of the slips of the reducing of a set of preventer and female preventer is equipped on hydraulic flashboard slips binding clasp, be that the slips of reducing of male preventer and the slips of the reducing of female preventer are installed respectively in two side through hole of a pair of side through hole of housing of hydraulic flashboard slips binding clasp, a same a pair of left side at housing, the slips of the reducing of the slips of the reducing of the interior male preventer of right side through hole and female preventer complements one another, relative between two, and in the through hole of the same side, the box structure of the slips of the reducing of the pin thread structure reeve preventer of the piston rod that it is corresponding is interior and mutually identical, the slips of the reducing of the preventer that two complements one another is the slips of the reducing of a set of preventer, the be tightly connected hydraulic oil pipeline of hydraulic system of the port connection of hydraulic flashboard slips binding clasp, when the left and right cylinder barrel that enters the slips of the reducing of controlling preventer when hydraulic control system hydraulic oil is closed chamber, the slips of the reducing of promotion piston-advance and drive left and right preventer moves to well head center respectively along the side through hole of housing, the slips of the reducing of two preventers docks mutually, and the slips of the reducing of two preventers is in conjunction with the tubing string of clamp cylinders shape, when clamped tubing string is large diameter columniform tubing string, the slip insert of the side slip insert structure of the side inwall of the slips of the reducing of the slips of the reducing of the preventer that it is male and female preventer touches the surface of large diameter columniform tubing string, because the internal diameter of the slip insert of the side slip insert structure of side inwall is greater than the internal diameter of slip insert of the side slip insert structure of intermediate inner wall, the external diameter of large diameter columniform tubing string (1) is greater than the internal diameter of slip insert of the middle slips dental structure of intermediate inner wall, thereby the slip insert of the middle slips dental structure of intermediate inner wall can not touch the surface of large diameter columniform tubing string, thrust due to piston forward, make to have produced mutual thrust (along tubing string radial direction) between the slips of reducing of male preventer and the slips of the reducing of female preventer, thereby make the slips of reducing of male preventer and the large diameter columniform tubing string of the stressed clamping of slips of the reducing of female preventer.Equally, when columniform tubing string that clamped tubing string is minor diameter, the slip insert of the side slip insert structure of the intermediate inner wall of the slips of the reducing of the slips of the reducing of the preventer that it is male and female preventer touches the surface of the columniform tubing string of minor diameter, because the internal diameter of the slip insert of the side slip insert structure of side inwall is greater than the internal diameter of slip insert of the side slip insert structure of intermediate inner wall, the external diameter of the columniform tubing string (2) of minor diameter is less than the internal diameter of slip insert of the side slip insert structure of side inwall, thereby each slip insert of the side slip insert structure of side inwall can not touch the surface of the columniform tubing string of minor diameter, the male head structure of the front of the slips of the reducing of male preventer cooperatively interacts and is connected with the groove structure of the front of the slips of the reducing of female preventer, two males of male head structure of slips of the reducing of male preventer are injected respectively in two grooves of groove structure of slips of reducing of female preventer of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of the slips of the reducing of female preventer, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of slips of reducing of the public preventer of mutual correspondence, groove, in end unfilled corner, mutually coincide, thrust due to piston forward, make to have produced mutual thrust between the slips of reducing of male preventer and the slips of the reducing of female preventer, thereby make the slips of reducing of male preventer and the large diameter columniform tubing string of the stressed clamping of slips of the reducing of female preventer.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the slips of the reducing of preventer to move to leaving well head center position, unclamp columniform tubing string.The slips switch of the reducing of preventer is controlled by the reversal valve of the hydraulic control unit of hydraulic system.

Claims (4)

1. the slips of the reducing of a preventer, the slips of the reducing of preventer is the shape and structure of block, on the slips external surface of the reducing of preventer, there are two outerplanars that are parallel to each other that relative arc outer wall face is relative with two, arc outer wall face intersects and is connected with two outerplanars respectively, outerplanar is vertical with the middle tangent plane of the slips of the reducing of preventer, two outerplanar, one is upper plane, another is baseplane, the slips of the reducing of preventer comprises hatch frame, box structure, and hatch frame, box structure lay respectively at the front and rear of slips of the reducing of preventer, box structure is positioned at the rear portion of slips of the reducing of preventer, and box structure is convex slot, and it consists of inside groove and water jacket, the slips of the reducing of horizontal break-through preventer, its groove bottom is plane, and convex slot comprises inside groove and water jacket, and the width of its inside groove is greater than the width of water jacket, hatch frame is positioned at the front portion of slips of the reducing of preventer, hatch frame refers to the opening of anterior centre of slips of the reducing of preventer, the top layer of the inwall of its hatch frame is slip insert structure, slip insert structure is to be arranged to form by several slip inserts, slip insert is the pincers tooth of arc, the front portion of the slips of the reducing of preventer comprises two fronts, two fronts lay respectively at symmetrically preventer reducing slips the both sides of middle tangent plane, the complete pairing of slips of the reducing of preventer, the slips of the reducing of a set of preventer has the slips of the reducing of two preventers, the slips of the reducing of two preventers complements one another into the slips of the reducing of a set of preventer, it is characterized in that: the inwall of hatch frame comprises the inwall of three circular arcs, be intermediate inner wall and two side inwalls, two side inwalls intersect and are connected with intermediate inner wall respectively, two side inwalls lay respectively at intermediate inner wall both sides, be between its intermediate inner wall between two side inwalls, the inwall of its hatch frame is the combining structure of two side inwalls and an intermediate inner wall, the slip insert structure of the slips of the reducing of its preventer comprises three groups of slip insert structures, be positioned at the slip insert structure on the top layer of intermediate inner wall, it is referred to as middle slips dental structure, be positioned at the slip insert structure on the top layer of side inwall, it is referred to as side slip insert structure, side slip insert structure has two, slips dental structure both sides in the middle of two side slip insert structures lay respectively at, be in the middle of it between slip insert structure between two side slip insert structures, Corresponding matching is thick respectively for its side inwall and intermediate inner wall, the columniform tubing string of thin two kinds of specifications, it is the columniform tubing string that side inwall is corresponding thick, the columniform tubing string that intermediate inner wall is corresponding thin, thick columniform tubing string is large diameter columniform tubing string, the columniform tubing string of thin columniform tubing string minor diameter, in the slips of the reducing of two preventers of the slips of the reducing of same set of preventer, the fluted structure in front of the slips of the reducing of an one preventer, there is male head structure the front of the slips of the reducing of another preventer, the slips of the reducing of the preventer of its fluted structure is referred to as the slips of the reducing of female preventer, and it has the slips of reducing of the preventer of male head structure to be referred to as the slips of the reducing of public preventer, the fluted structure in front of the slips of the reducing of female preventer, there is male head structure the front of the slips of the reducing of public preventer.

2. the slips of the reducing of preventer according to claim 1, it is characterized in that: the groove structure of the slips of the reducing of female preventer comprises two grooves, three opening sheets, be on the top of front, to have the groove of two horizontal openings, its groove comprises groove bottom and groove side, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of female preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of female preventer, like this, on the top of its front, just form three apart from one another by the structure of opening sheet, its opening sheet of three is respectively upper shed sheet, split shed sheet, bottom opening sheet, the inwall of the opening sheet of three is all a part for side inwall, the male head structure of the slips of the reducing of public preventer comprises two males, groove, two unfilled corners, on the top of its front, have two horizontal apart from one another by outstanding male, between two male and end face, form groove, its groove comprises groove bottom and groove side, two relative Wei Cao sides, side of two males, groove bottom is for connecting the part that is sandwiched in two end faces between groove side of two groove sides, two groove sides are parallel to each other and intersect vertically and be connected with groove bottom respectively, groove bottom is vertical with the outerplanar of the slips of the reducing of public preventer, groove bottom and groove side are vertical with the middle tangent plane of the slips of the reducing of public preventer, between the lateral surface of male and end face, mutually intersect vertically and form the unfilled corner in outside, lateral surface and groove side are parallel to each other, the male of two is respectively male, lower male, the inwall of two males is all a part for side inwall, thereby, on the top of its front, just form two apart from one another by the structure of male, two unfilled corner is respectively unfilled corner and end unfilled corner.

3. according to the slips of the reducing of claim 1 or preventer claimed in claim 2, it is characterized in that: when the slips of the reducing of the slips of the reducing of female preventer and male preventer docks mutually, the slips of the reducing of the slips of the reducing of female preventer and male preventer complements each other to form a unified overall structure, in the slips of the reducing of two preventers of the slips of the reducing of a set of preventer, the male head structure of the front of the slips of the reducing of male preventer cooperatively interacts and is connected with the groove structure of the front of the slips of the reducing of female preventer, two males of male head structure of slips of the reducing of male preventer are injected respectively in two grooves of groove structure of slips of reducing of female preventer of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of the slips of the reducing of female preventer, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of slips of reducing of the public preventer of mutual correspondence, groove, in end unfilled corner, mutually coincide.

4. the slips of the reducing of preventer according to claim 1, it is characterized in that: the interior week of each slip insert of middle slips dental structure is on same affiliated circular arc side face, the interior week of each slip insert of side slip insert structure is on same affiliated circular arc side face, the internal diameter in the interior week of the slip insert of slips dental structure in the middle of the internal diameter in the interior week of the slip insert of side slip insert structure is greater than, it is the internal diameter of the affiliated circular arc side face in the interior week of the slip insert of slips dental structure in the middle of the internal diameter of affiliated circular arc side face in interior week of the slip insert of side slip insert structure is greater than, the affiliated circular arc side face in the interior week of the slip insert of two side slip insert structures and the arc core line of two side inwalls are same straight line, the arc core line of the affiliated circular arc side face in the interior week of the slip insert of intermediate inner wall and middle slips dental structure is same straight line, two arc core lines are parallel to each other, and respectively with the middle tangent plane of the slips of the reducing of preventer at grade, two arc core line is vertical with the outerplanar of the slips of the reducing of preventer respectively, the arc core line of side inwall is positioned at the place ahead of the arc core line of intermediate inner wall.