CN203879418U - Hydraulic driven flashboard slip clamp with variable diameter - Google Patents

Abstract

Provided is a hydraulic driven flashboard slip clamp with a variable diameter. The hydraulic driven flashboard slip clamp with a variable diameter comprises a housing, a hydraulic cylinder, a flashboard slip with a variable diameter, a side door, side door bolts, and an oil joint. The hydraulic driven flashboard slip clamp also comprises a sealing mechanism. The flashboard slip with a variable diameter has two internal diameter specifications so as to respectively adapt to and match two cylindrical pipe rods different in external diameter specification, so that the flashboard slip with a variable diameter is suitable for clamping both thick and thin cylindrical pipe rods that have two specifications. In this way, only one flashboard slip with a variable diameter of the hydraulic driven flashboard slip clamp is needed to clamp the thick and thin cylindrical pipe rods that have two specifications, so that pipe rods with variable diameters can be clamped. Therefore, the working time is saved, the trouble of replacing a flashboard slip is saved, the production efficiency of workers is greatly improved, and new safety hidden troubles are prevented.

Description

The variable bore ram slips binding clasp surging

Technical field

The utility model relates to the hydraulic flashboard slips binding clasp using in a kind of oil gas field shaft mouth operation, the variable bore ram slips binding clasp especially surging.

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 hydraulic flashboard slips binding clasp adopts hydraulic-driven, also 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, the left and right symmetry of structure of hydraulic flashboard slips binding clasp, 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 hydraulic flashboard slips binding clasp can not meet the required requirement of well workover.

Utility model content

The purpose of this utility model is: a kind of variable bore ram slips binding clasp surging is provided, the variable bore ram slips binding clasp equipment variable bore ram slips surging, and variable bore ram slips 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, variable bore ram slips 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, like this, it is thick that its variable bore ram slips adapts to clamping, the tubing string of the column type of thin two kinds of specifications, thereby, the variable bore ram slips binding clasp surging is realized and being clamped slightly by a set of variable bore ram slips, the tubing string of the column type of thin two kinds of specifications, realizing reducing clamps, 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 variable bore ram slips binding clasp surging is the utensil of the clamping tubing string that uses in oil gas field shaft mouth operation, when playing lower tubular column, the variable bore ram slips binding clasp surging can be realized the tubing string clamping in oil well well, and the tubing string in oil well is generally oil pipe, the variable bore ram slips binding clasp surging consists of housing, hydraulic cylinder, variable bore ram slips, side door, side door bolt, port connection, and the variable bore ram slips binding clasp surging also comprises sealing mechanism, the variable bore ram slips binding clasp surging 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.Variable bore ram slips is the shape and structure of block, on variable bore ram 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 variable bore ram slips, two outerplanar, one is upper plane, and another is baseplane.Variable bore ram slips comprises hatch frame, box structure, and hatch frame, box structure lay respectively at the front and rear of variable bore ram slips.Box structure is positioned at the rear portion of variable bore ram slips, and box structure is convex slot, and it consists of inside groove and water jacket, horizontal break-through variable bore ram 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.Hatch frame is positioned at the front portion of variable bore ram slips, hatch frame refers to the opening of the anterior centre of variable bore ram slips, 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 its variable bore ram slips 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 variable bore ram slips at grade, two arc core line is vertical with the outerplanar of variable bore ram slips 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 variable bore ram slips, the front portion of variable bore ram slips comprises two fronts, two fronts lay respectively at symmetrically variable bore ram slips the both sides of middle tangent plane.The complete pairing of variable bore ram slips, a set of variable bore ram slips has two variable bore ram slips, two variable bore ram slips complement one another into a set of variable bore ram slips, in two variable bore ram slips of same set of variable bore ram slips, the fluted structure in front of an one variable bore ram slips, there is male head structure the front of another variable bore ram slips; The variable bore ram slips of its fluted structure is referred to as female variable bore ram slips, and it has the variable bore ram slips of male head structure to be referred to as public variable bore ram slips.The fluted structure in front of female variable bore ram slips, 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 female variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of female variable bore ram slips, 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 public variable bore ram slips, 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 public variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of public variable bore ram slips, 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 female variable bore ram slips and male variable bore ram slips dock mutually, female variable bore ram slips and male variable bore ram slips complement each other to form a unified overall structure, in two variable bore ram slips of a set of variable bore ram slips, the male head structure of the front of male variable bore ram slips cooperatively interacts and is connected with the groove structure of the front of female variable bore ram slips, two males of the male head structure of male variable bore ram slips are injected respectively in two grooves of groove structure of female variable bore ram slips of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of female variable bore ram slips, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of the public variable bore ram slips of mutual correspondence, groove, in end unfilled corner, mutually coincide.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.The variable bore ram slips binding clasp surging is equipped a set of variable bore ram slips, be, in two side through hole of a pair of side through hole of housing of hydraulic flashboard slips binding clasp, male variable bore ram slips and female variable bore ram slips are installed respectively, a same a pair of left side at housing, male flashboard slips in the through hole of right side and female variable bore ram slips complement one another, relative between two, and in the through hole of the same side, the box structure of the pin thread structure reeve variable bore ram slips of the piston rod that it is corresponding is interior and mutually identical, the variable bore ram slips that two complements one another is a set of variable bore ram slips, the be tightly connected hydraulic oil pipeline of hydraulic system of the port connection of the variable bore ram slips binding clasp surging, when hydraulic control system hydraulic oil enters the left and right cylinder barrel of controlling variable bore ram slips and closes chamber, promote piston-advance and drive left and right variable bore ram slips to well head center, to move respectively along the side through hole of housing, two variable bore ram slips dock mutually, and two variable bore ram slips are 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 variable bore ram slips that it is male and female variable bore ram slips 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 male variable bore ram slips and female variable bore ram slips, thereby make male variable bore ram slips and the female large diameter columniform tubing string of the stressed clamping of variable bore ram slips.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 variable bore ram slips that it is male and female variable bore ram slips 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 male variable bore ram slips cooperatively interacts and is connected with the groove structure of the front of female variable bore ram slips, two males of the male head structure of male variable bore ram slips are injected respectively in two grooves of groove structure of female variable bore ram slips of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of female variable bore ram slips, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of the public variable bore ram slips 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 male variable bore ram slips and female variable bore ram slips, thereby make male variable bore ram slips and the female large diameter columniform tubing string of the stressed clamping of variable bore ram slips.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive variable bore ram slips to leaving the motion of well head center position, unclamp columniform tubing string.Variable bore ram slips switch is controlled by the reversal valve of the hydraulic control unit of hydraulic system.Like this, the variable bore ram slips binding clasp surging is realized the tubing string of the column type that clamps thick, thin two kinds of specifications by a set of variable bore ram slips, realizes reducing and clamps, thereby reach the purpose of this utility model.

Owing to having adopted technique scheme, the variable bore ram slips binding clasp surging is not only realized the tubing string of the column type that clamps thick, thin two kinds of specifications by a set of variable bore ram slips, and realize reducing and clamp, and also simple in structure.

Accompanying drawing explanation

Variable bore ram slips binding clasp the utility model being surged below in conjunction with embodiment is further described.

The structural representation of the variable bore ram slips binding clasp that the embodiment of the variable bore ram slips binding clasp that accompanying drawing 1 surges for the utility model surges.

The structural representation of female variable bore ram slips of the variable bore ram slips binding clasp that the embodiment of the variable bore ram slips binding clasp that accompanying drawing 2 surges for the utility model surges.

The structural representation of the public variable bore ram slips of the variable bore ram slips binding clasp that the embodiment of the variable bore ram slips binding clasp that accompanying drawing 3 surges for the utility model surges.

The front view of the three-view diagram of the public variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 4 surges for the utility model.

The lateral view of the three-view diagram of the public variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 5 surges for the utility model.

The top view of the three-view diagram of the public variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 6 surges for the utility model.

The lateral view of the three-view diagram of female variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 7 surges for the utility model.

The front view of the three-view diagram of female variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 8 surges for the utility model.

The top view of the three-view diagram of female variable bore ram slips of the embodiment of the variable bore ram slips binding clasp that accompanying drawing 9 surges for the utility model.

The variable bore ram slips of the variable bore ram slips binding clasp that the embodiment of the variable bore ram slips binding clasp that accompanying drawing 10 surges for the utility model surges clamps the principle analysis diagram of large tubing string.

The variable bore ram slips of the variable bore ram slips binding clasp that the embodiment of the variable bore ram slips binding clasp that accompanying drawing 11 surges for the utility model surges 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, variable bore ram slips 17, upper male 18, female variable bore ram slips 19, public variable bore ram slips 20, the front 21 of female variable bore ram slips, the front 22 of public variable bore ram slips, hydraulic cylinder 23, cylinder cap 24, piston rod 25, screw mandrel 26, cylinder barrel bolt 27, piston 28, cylinder barrel 29, housing 30, side door 31, side door bolt 32, flange arrangement

The specific embodiment

In figure: the variable bore ram slips binding clasp surging consists of housing (29), hydraulic cylinder (22), variable bore ram slips, side door (30), side door bolt (31), port connection, and the variable bore ram slips binding clasp surging also comprises sealing mechanism, the variable bore ram slips binding clasp surging 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 (32) and the center line of main through hole are on same straight line, housing has two side through hole, two side through hole communicate with main through hole respectively, 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 (28) and cylinder cap (23), piston (27) and piston rod (24), screw mandrel (25), cylinder barrel bolt (26) 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.Variable bore ram slips is the shape and structure of block, on variable bore ram slips (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 variable bore ram slips, two outerplanar, one is upper plane, and another is baseplane.Variable bore ram slips comprises hatch frame, box structure (5), and hatch frame, box structure lay respectively at the front and rear of variable bore ram slips.Box structure is positioned at the rear portion of variable bore ram slips, and box structure is convex slot, and it consists of inside groove and water jacket, horizontal break-through variable bore ram 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.Hatch frame is positioned at the front portion of variable bore ram slips, hatch frame refers to the opening of the anterior centre of variable bore ram slips, 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, 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 its variable bore ram slips 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 variable bore ram slips at grade, two arc core line is vertical with the outerplanar of variable bore ram slips 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 variable bore ram slips, the front portion of variable bore ram slips comprises two fronts, two fronts lay respectively at symmetrically variable bore ram slips the both sides of middle tangent plane.The complete pairing of variable bore ram slips, a set of variable bore ram slips has two variable bore ram slips, two variable bore ram slips complement one another into a set of variable bore ram slips, in two variable bore ram slips of same set of variable bore ram slips, the fluted structure in front of an one variable bore ram slips, there is male head structure the front of another variable bore ram slips; The variable bore ram slips of its fluted structure is referred to as female variable bore ram slips (18), and it has the variable bore ram slips of male head structure to be referred to as public variable bore ram slips (19).The fluted structure in front (20) of female variable bore ram slips, 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 female variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of female variable bore ram slips, 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 public variable bore ram slips, 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 public variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of public variable bore ram slips, 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 female variable bore ram slips and male variable bore ram slips dock mutually, female variable bore ram slips and male variable bore ram slips complement each other to form a unified overall structure, in two variable bore ram slips of a set of variable bore ram slips, the male head structure of the front of male variable bore ram slips cooperatively interacts and is connected with the groove structure of the front of female variable bore ram slips, two males of the male head structure of male variable bore ram slips are injected respectively in two grooves of groove structure of female variable bore ram slips of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of female variable bore ram slips, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of the public variable bore ram slips of mutual correspondence, groove, in end unfilled corner, mutually coincide.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.The variable bore ram slips binding clasp surging is equipped a set of variable bore ram slips, male variable bore ram slips and female variable bore ram slips are installed respectively in two side through hole of a pair of side through hole of the housing of the variable bore ram slips binding clasp surging, a same a pair of left side at housing, the interior male variable bore ram slips of right side through hole and female variable bore ram slips complement one another, relative between two, and in the through hole of the same side, the box structure of the pin thread structure reeve variable bore ram slips of the piston rod that it is corresponding is interior and mutually identical, the variable bore ram slips that two complements one another is a set of variable bore ram slips, the be tightly connected hydraulic oil pipeline of hydraulic system of the port connection of the variable bore ram slips binding clasp surging, when hydraulic control system hydraulic oil enters the left and right cylinder barrel of controlling variable bore ram slips and closes chamber, promote piston-advance and drive left and right variable bore ram slips to well head center, to move respectively along the side through hole of housing, two variable bore ram slips dock mutually, and two variable bore ram slips are 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 variable bore ram slips that it is male and female variable bore ram slips 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 male variable bore ram slips and female variable bore ram slips, thereby make male variable bore ram slips and the female large diameter columniform tubing string of the stressed clamping of variable bore ram slips.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 variable bore ram slips that it is male and female variable bore ram slips 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 male variable bore ram slips cooperatively interacts and is connected with the groove structure of the front of female variable bore ram slips, two males of the male head structure of male variable bore ram slips are injected respectively in two grooves of groove structure of female variable bore ram slips of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of female variable bore ram slips, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of the public variable bore ram slips 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 male variable bore ram slips and female variable bore ram slips, thereby make male variable bore ram slips and the female large diameter columniform tubing string of the stressed clamping of variable bore ram slips.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive variable bore ram slips to leaving the motion of well head center position, unclamp columniform tubing string.Variable bore ram slips switch is controlled by the reversal valve of the hydraulic control unit of hydraulic system.

Claims (4)

1. the variable bore ram slips binding clasp surging, the variable bore ram slips binding clasp surging consists of housing, hydraulic cylinder, variable bore ram slips, side door, side door bolt, port connection, and the variable bore ram slips binding clasp surging also comprises sealing mechanism, the variable bore ram slips binding clasp surging 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, variable bore ram slips is the shape and structure of block, on variable bore ram 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 variable bore ram slips, two outerplanar, one is upper plane, and another is baseplane, variable bore ram slips comprises hatch frame, box structure, and hatch frame, box structure lay respectively at the front and rear of variable bore ram slips, box structure is positioned at the rear portion of variable bore ram slips, and box structure is convex slot, and it consists of inside groove and water jacket, horizontal break-through variable bore ram 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, hatch frame is positioned at the front portion of variable bore ram slips, hatch frame refers to the opening of the anterior centre of variable bore ram slips, 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 variable bore ram slips comprises two fronts, two fronts lay respectively at symmetrically variable bore ram slips the both sides of middle tangent plane, the complete pairing of variable bore ram slips, a set of variable bore ram slips has two variable bore ram slips, and two variable bore ram slips complement one another into a set of variable bore ram slips, 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, it is characterized in that: the inwall of the hatch frame of variable bore ram slips 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 its variable bore ram slips 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 two variable bore ram slips of same set of variable bore ram slips, the fluted structure in front of an one variable bore ram slips, there is male head structure the front of another variable bore ram slips, the variable bore ram slips of its fluted structure is referred to as female variable bore ram slips, and it has the variable bore ram slips of male head structure to be referred to as public variable bore ram slips, the fluted structure in front of female variable bore ram slips, there is male head structure the front of public variable bore ram slips.

2. the variable bore ram slips binding clasp surging according to claim 1, it is characterized in that: the groove structure of female variable bore ram slips 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 female variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of female variable bore ram slips, 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 public variable bore ram slips 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 public variable bore ram slips, groove bottom and groove side are vertical with the middle tangent plane of public variable bore ram slips, 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 claim 1 or the variable bore ram slips binding clasp surging claimed in claim 2, it is characterized in that: when female variable bore ram slips and male variable bore ram slips dock mutually, female variable bore ram slips and male variable bore ram slips complement each other to form a unified overall structure, in two variable bore ram slips of a set of variable bore ram slips, the male head structure of the front of male variable bore ram slips cooperatively interacts and is connected with the groove structure of the front of female variable bore ram slips, two males of the male head structure of male variable bore ram slips are injected respectively in two grooves of groove structure of female variable bore ram slips of mutual correspondence coincide mutually, simultaneously, the upper shed sheet of the groove structure of female variable bore ram slips, split shed sheet, bottom opening sheet injects respectively the upper unfilled corner of the public variable bore ram slips of mutual correspondence, groove, in end unfilled corner, mutually coincide.

4. the variable bore ram slips binding clasp surging 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 variable bore ram slips at grade, two arc core line is vertical with the outerplanar of variable bore ram slips respectively, the arc core line of side inwall is positioned at the place ahead of the arc core line of intermediate inner wall.