CN214576821U - Slip for sucker rod - Google Patents

Abstract

The present disclosure relates to a sucker rod slip, and belongs to the field of oil extraction. Comprises a slip seat and a slip body. The slip seat has the second installation cavity of cylindric first installation cavity and round platform form, and first installation cavity and second installation cavity intercommunication and central line coincide, and the one end of first installation cavity is used for being connected with oil pipe detachably, and the other end and the less one end of second installation cavity opening of first installation cavity are connected, and when the one end and the oil pipe connection of first installation cavity, the central line of first installation cavity and the central line coincidence of oil pipe. The slips body includes a plurality of sub slips bodies, and every sub slips body has circular arc recess and support wall, and circular arc recess and support wall are located the both sides of the sub slips body relatively, and the slips body is arranged in the second installation cavity, and the circular arc recess of a plurality of sub slips bodies constitutes the sucker rod installation cavity, and the central line of sucker rod installation cavity and the central line coincidence of first installation cavity, and the support wall of every sub slips body all offsets with the inner wall of second installation cavity.

Description

Slip for sucker rod

Technical Field

The present disclosure relates to the field of oil production, and more particularly to a sucker rod slip.

Background

Sucker rods are important components in tools used to extract oil in oilfield production systems. The polished rod is connected to the one end of sucker rod, and the oil-well pump is connected to the other end of sucker rod, and the polished rod drives the sucker rod and reciprocates in the well, and the sucker rod provides power for the oil-well pump at the in-process that reciprocates, takes the oil out from the well. In the oil extraction process, the operation of tripping and tripping the sucker rod is involved, for example, when installing the sucker rod, or when replacing or repairing the sucker rod. When the sucker rod is pulled down and pulled out, the sucker rod is clamped through the sucker rod slip, then the elevator is used for being connected with the sucker rod slip, and the sucker rod slip and the sucker rod are pulled down or pulled out through the elevator.

In the correlation technique, the sucker rod slips includes two slips bodies, and the one end of two slips bodies is articulated, all has semicircular recess on two slips relative faces, and when semicircular recess on two slips was relative, two semicircular recess on two slips bodies constitute the through-hole that is used for installing the sucker rod, and the outward flange of the structure that two slips bodies constitute this moment is the round platform form. The elevator is provided with a round table-shaped through hole matched with the round table-shaped slip of the sucker rod, after the sucker rod is clamped by the two slip bodies, the slip of the sucker rod is placed into the round table-shaped through hole of the elevator, then the sucker rod and the slip of the sucker rod are hoisted together by using the elevator, and the sucker rod is placed underground or taken out from the underground.

However, in the process of tripping the sucker rod, the concentricity of the sucker rod and the underground oil pipe cannot be guaranteed, the position of the sucker rod needs to be adjusted for many times, and the operation is complicated.

Disclosure of Invention

The disclosed embodiment provides a sucker rod slip, which guarantees the concentricity of a sucker rod and a downhole oil pipe when the sucker rod is pulled down. The technical scheme is as follows:

the present disclosure provides a sucker rod slip, the sucker rod slip includes:

the slip seat is provided with a cylindrical first mounting cavity and a circular truncated cone-shaped second mounting cavity, the first mounting cavity is communicated with the second mounting cavity, the center lines of the first mounting cavity and the second mounting cavity are overlapped, one end of the first mounting cavity is detachably connected with an oil pipe, the other end of the first mounting cavity is communicated with the end, with a smaller opening, of the second mounting cavity, and when one end of the first mounting cavity is connected with the oil pipe, the center line of the first mounting cavity is overlapped with the center line of the oil pipe;

the slips body, including a plurality of sub slips bodies, every the sub slips body has circular arc recess and support wall, the circular arc recess with the support wall is located relatively the both sides of the sub slips body, the slips body is located in the second installation cavity, the circular arc recess of a plurality of sub slips bodies constitutes the sucker rod installation cavity, the central line of sucker rod installation cavity with the central line coincidence of first installation cavity, every the support wall of the sub slips body all with the inner wall of second installation cavity offsets.

In one implementation of the disclosed embodiment, the slip bowl includes:

the first mounting seat is provided with the first mounting cavity;

the second mounting seat is provided with the second mounting cavity and is connected with the first mounting seat;

the first mounting seat is a cylindrical mounting seat, and an external thread is arranged at one end, far away from the second mounting seat, of the first mounting seat.

In one implementation of the embodiment of the present disclosure, the inner sidewall of the arc groove has serrations.

In one implementation of the disclosed embodiment, the slip comprises a first, a second and a third slip;

the first sub-card tile body is hinged with the second sub-card tile body through a first hinge shaft, the first sub-card tile body is hinged with the third sub-card tile body through a second hinge shaft, and the extending direction of the first hinge shaft and the extending direction of the second hinge shaft are both parallel to the extending direction of the sucker rod installation cavity;

the first hinge shaft and the second hinge shaft are positioned on two sides of the arc groove of the first sub-card tile body.

In one implementation manner of the embodiment of the present disclosure, the first daughter card tile body includes a first ear plate and a second ear plate, and the first ear plate and the second ear plate are respectively located at two opposite side edges of the first daughter card tile body;

the second daughter card tile includes a third ear plate, the third daughter card tile includes a fourth ear plate;

the first ear plate is hinged to the third ear plate through the first hinge shaft, and the second ear plate is hinged to the fourth ear plate through the second hinge shaft.

In one implementation of the disclosed embodiment, the sucker rod slips further include:

one end of the connecting frame is hinged with one end, far away from the second mounting cavity, of the slip seat, and the other end of the connecting frame is connected with the slip body;

the telescopic rod, the one end of telescopic rod with the middle part of link is articulated, the one end of telescopic rod with the middle part of slip seat is articulated.

In one implementation manner of the embodiment of the present disclosure, one end surface of the slip bowl, which is far away from the second mounting cavity, is provided with a circle of protrusions, and the protrusions surround one end of the second mounting cavity, which is far away from the first mounting cavity;

one end of the connecting frame is hinged with the edge of the bulge.

In one implementation of the disclosed embodiment, the connection frame is an H-shaped connection frame or an L-shaped connection frame.

In one implementation of the disclosed embodiment, the link is an H-shaped link;

the connecting frame comprises two supporting rods and a connecting rod which are arranged in parallel, and two ends of the connecting rod are respectively connected with the middle parts of the two supporting rods;

one end of each of the two support rods is hinged to the corresponding protruding edge, the other end of each of the two support rods is connected with the slip body, and the other end of each of the telescopic rods is hinged to the corresponding connecting rod.

In one implementation manner of the embodiment of the present disclosure, one end of the support rod is hinged to the protrusion through a first bolt, and a gasket is disposed between the support rod and the protrusion along an extending direction of the first bolt.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

when the sucker rod slip provided by the embodiment of the disclosure is used, one end of the first mounting cavity of the slip seat is connected with an oil pipe. Then insert second installation cavity and first installation cavity with the sucker rod in proper order from the one end that first installation cavity was kept away from to the second installation cavity. And then a plurality of sub-slip bodies of the slip bodies are sleeved on the sucker rod, the sucker rod is arranged in a sucker rod installation cavity formed by the arc grooves of the sub-slip bodies, and then the slip bodies are placed in a second installation cavity. Because the second installation cavity is round platform form, and the less one end of second installation cavity opening is towards oil pipe, at the in-process of the whereabouts of the slip body, the support wall of the slip body offsets with the inner wall of second installation cavity, and the slip body can not subside downwards again, also promptly with the slip body fixed. Because the sucker rod is installed in the sucker rod installation cavity, the sucker rod is fixed. And the central line of first installation cavity and the central line coincidence of oil pipe this moment, the central line coincidence of sucker rod installation cavity and first installation cavity, the internal diameter of sucker rod installation cavity equals the external diameter of sucker rod, so the central line of sucker rod and the central line coincidence of oil pipe this moment guarantee sucker rod and oil pipe's in the pit concentricity, need not to adjust the position of sucker rod many times easy operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating the construction of a sucker rod slip according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a sucker rod slip provided by an embodiment of the present disclosure;

FIG. 3 is a top view of a sucker rod slip according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a sucker rod slip configuration according to an embodiment of the present disclosure. Referring to fig. 1, a sucker rod slip comprises: a slip bowl 10 and a slip body 20. The slip seat 10 is provided with a cylindrical first mounting cavity 11 and a circular truncated cone-shaped second mounting cavity 12, the first mounting cavity 11 is communicated with the second mounting cavity 12, the center line of the first mounting cavity 11 is overlapped, one end of the first mounting cavity 11 is detachably connected with an oil pipe, the other end of the first mounting cavity 11 is connected with one end of the second mounting cavity 12 with a smaller opening, and when one end of the first mounting cavity 11 is connected with the oil pipe, the center line of the first mounting cavity 11 is overlapped with the center line of the oil pipe. The slips body 20 includes a plurality of sub slips bodies, every sub slips body has circular arc recess and support wall, circular arc recess and support wall are located the both sides of sub slips body relatively, the slips body 20 is arranged in second installation cavity 12, the circular arc recess of a plurality of sub slips bodies constitutes sucker rod installation cavity 21, the central line of sucker rod installation cavity coincides with the central line of first installation cavity 11, the support wall of every sub slips body all offsets with the inner wall of second installation cavity 12.

When the sucker rod slip provided by the embodiment of the disclosure is used, one end of the first installation cavity 11 of the slip seat 10 is firstly connected with an oil pipe. Then the sucker rod 100 is inserted into the second installation cavity 12 and the first installation cavity 11 in sequence from the end of the second installation cavity 12 far away from the first installation cavity 11. Then a plurality of sub-slips of the slip body 20 are sleeved on the sucker rod 100, the sucker rod 100 is installed in a sucker rod installation cavity 21 formed by the arc grooves of the sub-slips, and then the slip body 20 is placed in the second installation cavity 12. Because the second installation cavity 12 is round platform form, and the less one end of second installation cavity 12 opening is towards oil pipe, at the in-process that the slips body 20 fell down, the support wall of the slips body 20 offsets with the inner wall of second installation cavity 12, and the slips body can not subside downwards again, also promptly with the slips body 20 fixed. Since the sucker rod 100 is installed in the sucker rod installation cavity 21, the sucker rod 100 is fixed. And the central line of first installation cavity 11 coincides with the central line of oil pipe this moment, and the central line of sucker rod installation cavity 21 and first installation cavity 11 coincides, and the internal diameter of sucker rod installation cavity 21 equals the external diameter of sucker rod 100, so the central line of sucker rod 100 coincides with the central line of oil pipe this moment, guarantees the concentricity of sucker rod 100 and oil pipe in the pit, need not to adjust the position of sucker rod 100 many times, easy operation.

In the embodiment of the present disclosure, the slip bowl 10 further includes a connecting portion, the connecting portion has a cylindrical connecting cavity, the connecting cavity is communicated with the first installation cavity 11, an inner diameter of the connecting cavity is equal to an inner diameter of the downhole oil pipe, and a center line of the connecting cavity coincides with a center line of the first installation cavity 11. Thereby ensuring that the centre line of the first installation chamber 11 coincides with the centre line of the oil pipe when one end of the first installation chamber 11 is connected to the oil pipe.

In one implementation of the disclosed embodiment, the slip bowl 10 is a stainless steel slip bowl.

In embodiments of the present disclosure where the sucker rod slips are located downhole during use, downhole fluids may corrode the sucker rod slips. The slip seat 10 is a stainless steel slip seat, so that on one hand, the strength of the slip seat 10 is ensured, and on the other hand, the corrosion resistance of the slip seat 10 is improved, the possibility of damage to the slip seat 10 is reduced, and the maintenance cost is reduced.

In one implementation of the disclosed embodiment, the slip body 20 is a stainless steel slip body.

In the embodiment of the present disclosure, the slip body 20 is a stainless steel slip body, on one hand, the strength of the slip body 20 is ensured, and on the other hand, the corrosion resistance of the slip body 20 is improved, the possibility of damage to the slip body 20 is reduced, and the maintenance cost is reduced.

FIG. 2 is a schematic cross-sectional view of a sucker rod slip provided by an embodiment of the present disclosure. Referring to fig. 1 and 2, the slip bowl 10 includes: a first mount 101 and a second mount 102. The first mounting seat 101 has a first mounting cavity 11, the second mounting seat 102 has a second mounting cavity 12, and the second mounting seat 102 is connected with the first mounting seat 101. The first mounting seat 101 is a cylindrical mounting seat, and an end of the first mounting seat 101 away from the second mounting seat 102 has an external thread. Wherein, the end of the first mounting seat 101 away from the second mounting seat 102 is a connecting portion of the slip seat 10.

In the disclosed embodiment, the first and second mounting seats 101 and 102 are arranged, and the first and second mounting cavities 11 and 12 are formed in the first and second mounting seats 101 and 102, respectively, to facilitate the design and manufacture of the slip bowl 10. Meanwhile, the first mounting seat 101 is arranged into a cylindrical mounting seat, so that external threads can be conveniently manufactured and connected with an oil pipe.

In the embodiment of the present disclosure, the external thread of the first mounting seat 101 is connected with the internal thread of the oil pipe, so that the first mounting seat is convenient to detach.

In the disclosed embodiment, when the blowout preventer is mounted on the tubing, the blowout preventer is connected with the first mounting seat 101 and the tubing, respectively, and the first mounting seat 101 is connected with the blowout preventer through the external thread of the end portion.

In an implementation manner of the embodiment of the present disclosure, when the external thread of the first mounting seat 101 is not matched with the internal thread of the blowout preventer or the internal thread of the oil pipe, a fastening sub may be installed at one end of the first mounting seat 101, the thread at one end of the fastening sub is matched with the external thread of the first mounting seat 101, and the thread at the other end of the fastening sub is matched with the internal thread of the blowout preventer or the internal thread of the oil pipe, so that the first mounting seat 101 is connected with the blowout preventer or the oil pipe conveniently.

As shown in fig. 1 and 2, the outer surface of the second mounting seat 102 is truncated cone-shaped, and matches with the shape of the second mounting cavity 12, so that the second mounting cavity 12 is convenient to manufacture.

In the embodiment of the present disclosure, the first mounting seat 101 and the second mounting seat 102 may be connected by welding, or the first mounting seat 101 and the second mounting seat 102 are manufactured by integrally molding, which is not limited by the present disclosure.

FIG. 3 is a top view of a sucker rod slip according to an embodiment of the present disclosure. Referring to fig. 3, the inner side wall of the circular arc groove has serrations 22.

In the embodiment of the present disclosure, the saw teeth 22 are disposed on the inner side wall of the arc groove, and when the sucker rod 100 is installed in the sucker rod installation cavity 21, the sucker rod 100 is engaged by the saw teeth 22, so that the friction force between the slip body 20 and the sucker rod 100 is increased, and the stability of the sucker rod 100 is ensured.

Referring again to fig. 3, the slip 20 includes a first slip 201, a second slip 202 and a third slip 203. The first daughter card tile body 201 and the second daughter card tile body 202 are hinged through a first hinge shaft 204, the first daughter card tile body 201 and the third daughter card tile body 203 are hinged through a second hinge shaft 205, and the extending direction of the first hinge shaft 204 and the extending direction of the second hinge shaft 205 are parallel to the extending direction of the sucker rod installation cavity 21. The first hinge axis 204 and the second hinge axis 205 are located on both sides of the arc groove of the first daughter card tile body 201.

In the embodiment of the present disclosure, a first sub-card tile 201, a second sub-card tile 202 and a third sub-card tile 203 are arranged, and when the first sub-card tile 201, the second sub-card tile 202 and the third sub-card tile 203 enclose a circle, the circular arc grooves of the first sub-card tile 201, the second sub-card tile 202 and the third sub-card tile 203 form a sucker rod installation cavity 21. Meanwhile, the first sub-card tile body 201, the second sub-card tile body 202 and the third sub-card tile body 203 are connected, when the tile body 20 is taken out, the three sub-tile bodies can be taken out only by taking out one of the sub-card tile bodies, and the tile body 20 is convenient to take and place.

The first daughter card tile 201 and the second daughter card tile 202 are hinged through a first hinge shaft 204, and the first daughter card tile 201 and the third daughter card tile 203 are hinged through a second hinge shaft 205, that is, the second daughter card tile 202 and the third daughter card tile 203 are openable. When the sucker rod 100 is installed, the opening and closing opening between the second sub-card tile body 202 and the third sub-card tile body 203 is enlarged by rotating the second sub-card tile body 202 and the third sub-card tile body, so that the sucker rod 100 is conveniently placed into the sucker rod installation cavity 21 formed by the arc grooves of the first sub-card tile body 201, the second sub-card tile body 202 and the third sub-card tile body 203. When putting into the second installation cavity 12 with the slip body 20 that first daughter card tile body 201, second daughter card tile body 202 and third daughter card tile body 203 are constituteed, under the effect of gravity, slip body 20 moves towards first installation cavity 11, because the less one end intercommunication of first installation cavity 11 and second installation cavity 12 opening, and the support wall of every daughter card tile body all offsets with the inner wall of second installation cavity 12, make the distance between second daughter card tile body 202 and the third daughter card tile body 203 reduce gradually, sucker rod installation cavity 21 that the circular arc recess constitutes cliies sucker rod 100.

When the sucker rod 100 is taken out, the slip body 20 consisting of the first sub-slip body 201, the second sub-slip body 202 and the third sub-slip body 203 is taken out from the second installation cavity 12, the first sub-slip body 201 is pulled to the outer side of the sucker rod 100, the sucker rod 100 generates a thrust force on the second sub-slip body 202 and the third sub-slip body 203, so that the opening and closing opening between the second sub-slip body 202 and the third sub-slip body 203 is enlarged, the sucker rod 100 is separated from the opening and closing opening between the second sub-slip body 202 and the third sub-slip body 203, the slip body 20 is taken out, and then the whole sucker rod is taken out from the underground.

In the embodiment of the present disclosure, the slip body 20 can be replaced according to the diameter of the actual sucker rod, and the inner diameter of the sucker rod installation cavity 21 of different slip bodies 20 is different.

Illustratively, the sucker rod mounting cavity 21 of the slip body 20 has an inner diameter of 19 millimeters (mm), or 22 mm, or 25 mm, or 28 mm.

In the embodiment of the present disclosure, the outer surface of the slip body 20 is hard printed with the inner diameter of the sucker rod installation cavity 21 of the slip body 20, which is convenient for the searching of the worker. Before using the slip of the sucker rod, whether the specification of the slip body 20 is the same as the outer diameter of the used sucker rod and whether the assembling direction of the slip body 20 is correct should be checked.

As shown in fig. 3, one side of the sub-card tile body has an arc-shaped groove, and the outer side surface of the sub-card tile body is arc-shaped, and the arc surface matches with the inner arc of the second mounting cavity 12. The top surface of the daughter card tile body is convex.

Referring again to fig. 3, the first daughter card tile 201 includes a first ear plate 211 and a second ear plate 212, the first ear plate 211 and the second ear plate 212 being located on opposite sides of the first daughter card tile 201. The second daughter card tile 202 comprises a third ear plate 221 and the third daughter card tile 203 comprises a fourth ear plate 231. The first ear plate 211 is hinged to the third ear plate 221 by a first hinge axis 204, and the second ear plate 212 is hinged to the fourth ear plate 231 by a second hinge axis 205.

In the embodiment of the present disclosure, the first ear plate 211 and the third ear plate 221 are arranged, and the hinge connection of the first daughter card tile body 201 and the second daughter card tile body 202 is realized through the hinge connection of the first ear plate 211 and the third ear plate 221. The second ear plate 212 and the fourth ear plate 231 are arranged, and the hinging of the first daughter card tile body 201 and the third daughter card tile body 203 is realized through the hinging of the second ear plate 212 and the fourth ear plate 231, which is more convenient.

In the disclosed embodiment, the first hinge shaft 204 and the second hinge shaft 205 are both bolts. The first lug plate 211 and the third lug plate 221 are provided with through holes which are communicated with each other, bolts sequentially pass through the through holes on the first lug plate 211 and the third lug plate 221, and then nuts are fastened on the bolts to realize the hinging of the first lug plate 211 and the third lug plate 221; the second ear plate 212 and the fourth ear plate 231 are provided with through holes communicated with each other, the bolt sequentially passes through the through holes in the second ear plate 212 and the fourth ear plate 231, and then the bolt is fastened with a nut, so that the second ear plate 212 and the fourth ear plate 231 are hinged.

Referring again to FIG. 1, the sucker rod slip further comprises: a connecting frame 30 and a telescopic rod 40. One end of the connecting frame 30 is hinged with one end of the slip bowl 10 far away from the second mounting cavity 12, and the other end of the connecting frame 30 is connected with the slip body 20. One end of the telescopic rod 40 is hinged with the middle part of the connecting frame 30, and the other end of the telescopic rod 40 is hinged with the middle part of the slip seat 10.

In the disclosed embodiment, the connecting bracket 30 is arranged to connect the slip body 20 and the slip bowl 10, and the slip body 20 and the slip bowl 10 can be put into the well together when the sucker rod 100 is installed, or the slip body 20 and the slip bowl 10 can be taken out of the well together when the sucker rod slip is taken out. Arranging the telescopic link 40 simultaneously and being used for driving the link 30 to move, when the telescopic link 40 extends, the telescopic link 40 jacks up the middle part of the link 30, because the one end of the link 30 is articulated with the one end of the slip seat 10 far away from the second installation cavity 12, the one end of the link 30 connected with the slip seat 10 can not move upwards, and can only rotate under the drive of the telescopic link, and the other end of the link 30 connected with the slip body 20 moves upwards, so that the slip body 20 is taken out from the second installation cavity 12. When the telescopic rod 40 is contracted, the telescopic rod 40 pulls the connecting frame 30, so that the connecting frame 30 moves in a direction toward the second mounting cavity 12, and the other end of the connecting frame 30 connected with the slip body 20 moves downward, thereby placing the slip body 20 into the second mounting cavity 12.

For example, the telescopic rod 40 may be a hydraulic rod or a pneumatic rod. When the telescopic rod 40 is a hydraulic rod, the hydraulic rod is connected with a hydraulic cylinder, and the hydraulic cylinder supplies liquid to the hydraulic rod to control the extension of the hydraulic rod. When the telescopic rod 40 is a pneumatic rod, the pneumatic rod is connected with a cylinder, and the cylinder supplies liquid to the pneumatic rod to control the expansion of the pneumatic rod.

In the embodiment of the disclosure, the cylinder can be a vertical cylinder, and the vertical cylinder has the characteristics of large centering force, vertical lifting, convenience in installation and the like. The working pressure of the vertical cylinder is earlier by 0.5 MPa (MPa) to 0.9 MPa. The maximum extension of the telescopic bar 40 is 150 millimeters (mm).

Referring again to fig. 1, 2 and 3, the slip bowl 10 has a ring of projections 103, the projections 103 surrounding an end of the second housing 12 remote from the first housing 11. One end of the link 30 is hinged to the edge of the protrusion 103.

In the disclosed embodiment, a protrusion 103 is disposed in the slip bowl 10 to facilitate the coupling of the coupling frame 30 with the slip bowl 10.

As shown in fig. 3, the top view of the protrusion 103 is similar to a hexagon formed by splicing a square and a trapezoid, the slip bowl 10 is surrounded by the square, wherein the bottom side of the trapezoid is connected with one side of the square, and one end of the connecting frame 30 is hinged with the edge of the top side of the trapezoid.

As shown in figure 3, the corners of the hexagon are all round corners, so that workers are prevented from being scratched when the sucker rod slips are used.

As shown in fig. 3, the hexagonal projection 103 has a recess 133 therein, and the recess 133 is located on both sides of the trapezoidal portion of the projection 103. The groove 133 serves to reduce the weight of the protrusion 103 while conserving resources.

Referring again to fig. 3, the connecting bracket 30 is an H-shaped connecting bracket. The connecting frame 30 includes two support rods 301 and a connecting rod 302 arranged in parallel, and both ends of the connecting rod 302 are respectively connected with the middle portions of the two support rods 301. One end of each of the two support rods 301 is hinged to the edge of the protrusion 103, the other end of each of the two support rods 301 is connected with the slip body 20, and the other end of the telescopic rod 40 is hinged to the connecting rod 302.

As shown in fig. 3, the connecting frame 30 includes three connecting rods 302, and the three connecting rods 302 are sequentially arranged along the extending direction of the supporting rod 301. The other end of the telescopic rod 40 is hinged to a middle connecting rod 302.

As shown in fig. 3, the middle connecting rod 302 is a screw rod, the screw rod sequentially passes through the through holes on the supporting rod 301, and the other end of the screw rod is fastened with a nut. In the process of extending and retracting the telescopic rod 40, the connecting rod 302 connected with the telescopic rod 40 needs to rotate, and the middle connecting rod 302 is arranged as a screw rod, so that the connecting rod 302 can rotate conveniently.

In the disclosed embodiment, the coupling brackets 30 are arranged as H-shaped coupling brackets to facilitate coupling of the coupling brackets 30 with the slip body 20.

As shown in fig. 1 and 3, the protrusion 103 has a first through hole 131, the other ends of the two support rods 301 have second through holes 311, the first through hole 131 is located between the second through holes 311 of the two support rods 301, and the first through hole 131 is communicated with the second through holes 311. The first bolt 304 sequentially passes through the second through hole 311 on one support rod 301, the first through hole 131 and the second through hole 311 on the other support rod 301, and then the first fastening nut 305 is fastened on the first bolt 304, so that the support rod 301 is hinged with the protrusion 103.

As shown in fig. 1 and 3, a spacer 303 is provided between the support rod 301 and the boss 103 along the extending direction of the first bolt 304. The gasket 303 is arranged, and during the relative rotation of the support rod 301 and the boss 103, the gasket 303 is worn, so that the wear of the support rod 301 and the boss 103 is reduced.

As shown in fig. 1 and 2, the other ends of the two support rods 301 pass through the side wall of the second mounting base 102 to connect with the first daughter card tile 201 located in the second mounting base 102. The side wall of the second mounting seat 102 has a notch 121 for the support rod 301 to pass through.

As shown in fig. 1 and 3, a connecting protrusion 213 is disposed on the first daughter card tile 201, and the supporting rod 301 is connected to the first daughter card tile 201 through the connecting protrusion 213. Wherein the connecting protrusion 213 is a portion of the raised first daughter card tile 201.

In the disclosed embodiment, the second daughter card tile 202 and the third daughter card tile 203 each have a connection protrusion disposed thereon, but are not used for connection.

As shown in fig. 3, the connecting protrusion 213 has a third through hole 214, one end of each of the two support rods 301 has a fourth through hole 312, the third through hole 214 is located between the fourth through holes 312 of the two support rods 301, and the third through hole 214 is communicated with the fourth through hole 312. The second bolt 306 sequentially passes through the third through hole 214 and the fourth through hole 312 of one support rod 301 and the third through hole 214 of the other support rod 301, and then the second fastening nut 307 is fastened on the second bolt 306, so that the support rod 301 is connected with the connecting protrusion 213.

In another implementation of the disclosed embodiment, the link 30 is an L-shaped link. That is, the connecting frame 30 includes a first connecting rod and a second connecting rod, the extending directions of the first connecting rod and the second connecting rod are crossed, one end of the first connecting rod is hinged with the protrusion 103, the other end of the first connecting rod is connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the first sub-tile body 201.

In the embodiment of the present disclosure, the connecting frame 30 is arranged as an L-shaped connecting frame, the second connecting rod extends into the second mounting cavity 12 from the top of the second mounting cavity 12 to be connected to the first daughter card tile body 201 located in the second mounting cavity 12, and there is no need to make a groove for the connecting rod to extend into on the second mounting seat, which is convenient to make.

In the disclosed embodiment, one end of the telescopic rod 40 is connected to the middle of the first link.

The maximum working load of the sucker rod slips provided by the embodiment of the disclosure is 12 tons (T).

Before the sucker rod is pulled out, the slip body needs to be lifted firstly, and the slip body is not allowed to be pulled out and drilled down when in the slip seat, so that accidents are avoided.

Before using the sucker rod slips that this disclosed embodiment provided, can carry out no-load operation test, whether each part of carefully observing sucker rod slips is nimble, reliable, whether the slips promotes, puts down and has the jam etc..

The sucker rod card that this disclosed embodiment provided is adapted to oil, natural gas (shale gas), coal bed gas exploitation in-process in the operation construction in the pit, carries out the sucker rod pump and examines the pump operation and play down the sucker rod, realizes dismantling the sucker rod operation at well head control centre gripping sucker rod body, conveniently plays down or plays the sucker rod.

The sucker rod slips provided by the embodiment of the disclosure are designed and manufactured according to the requirements of API Spec 7K drilling and workover equipment Specification. The remote operation of the slips of the sucker rod can be realized, the labor intensity of workers is effectively reduced, the working efficiency is improved, and the slip is safe and reliable. The sucker rod slip is reasonable in structure, convenient to operate, safe and reliable, and is an ideal tool for workover treatment.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims (10)

1. A sucker rod slip, comprising:

the oil pipe joint structure comprises a slip seat (10) and a bearing bush seat, wherein the slip seat is provided with a cylindrical first mounting cavity (11) and a circular truncated cone-shaped second mounting cavity (12), the first mounting cavity (11) is communicated with the second mounting cavity (12), the central lines of the first mounting cavity (11) are overlapped, one end of the first mounting cavity (11) is detachably connected with an oil pipe, the other end of the first mounting cavity (11) is communicated with the end, with a smaller opening, of the second mounting cavity (12), and when one end of the first mounting cavity (11) is connected with the oil pipe, the central line of the first mounting cavity (11) is overlapped with the central line of the oil pipe;

the slips body (20) includes a plurality of sub slips bodies, every the sub slips body has circular arc recess and support wall, the circular arc recess with the support wall is located relatively the both sides of the sub slips body, the slips body (20) are located in second installation cavity (12), the circular arc recess of a plurality of sub slips bodies constitutes sucker rod installation cavity (21), the central line of sucker rod installation cavity with the coincidence of the central line of first installation cavity (11), every the support wall of the sub slips body all with the inner wall of second installation cavity (12) offsets.

2. The sucker rod slip of claim 1, wherein the slip bowl (10) comprises:

a first mounting seat (101) having the first mounting cavity (11);

a second mounting seat (102) having the second mounting cavity (12), the second mounting seat (102) being connected with the first mounting seat (101);

the first installation seat (101) is a cylindrical installation seat, and one end, far away from the second installation seat (102), of the first installation seat (101) is provided with an external thread.

3. The sucker rod slip of claim 1 or 2, wherein the arcuate grooves have serrations (22) on the inner side walls.

4. The sucker rod slip of claim 1 or 2, wherein the slip body (20) comprises a first sub-slip (201), a second sub-slip (202), and a third sub-slip (203);

the first sub-card tile body (201) and the second sub-card tile body (202) are hinged through a first hinge shaft (204), the first sub-card tile body (201) and the third sub-card tile body (203) are hinged through a second hinge shaft (205), and the extending direction of the first hinge shaft (204) and the extending direction of the second hinge shaft (205) are both parallel to the extending direction of the sucker rod installation cavity (21);

the first hinge shaft (204) and the second hinge shaft (205) are positioned at two sides of the circular arc groove of the first daughter card tile body (201).

5. The sucker rod slip of claim 4, wherein the first daughter slip body (201) comprises a first ear plate (211) and a second ear plate (212), the first ear plate (211) and the second ear plate (212) being located on opposite sides of the first daughter slip body (201), respectively;

the second daughter card tile (202) comprises a third ear plate (221), the third daughter card tile (203) comprises a fourth ear plate (231);

the first ear plate (211) is hinged to the third ear plate (221) through the first hinge shaft (204), and the second ear plate (212) is hinged to the fourth ear plate (231) through the second hinge shaft (205).

6. The sucker rod slip of claim 1 or 2, further comprising:

one end of the connecting frame (30) is hinged with one end, far away from the second mounting cavity (12), of the slip seat (10), and the other end of the connecting frame (30) is connected with the slip body (20);

the telescopic rod (40), one end of telescopic rod (40) with the middle part of link (30) is articulated, the other end of telescopic rod (40) with the middle part of slip seat (10) is articulated.

7. The sucker rod slip of claim 6, wherein the slip bowl (10) has a ring of protrusions (103) on an end face away from the second installation cavity (12), the protrusions (103) surrounding an end of the second installation cavity (12) away from the first installation cavity (11);

one end of the connecting frame (30) is hinged with the edge of the bulge (103).

8. The sucker rod slip of claim 7, wherein the attachment brackets (30) are H-shaped attachment brackets or L-shaped attachment brackets.

9. The sucker rod slip of claim 8, wherein the attachment frame (30) is an H-shaped attachment frame;

the connecting frame (30) comprises two supporting rods (301) and a connecting rod (302) which are arranged in parallel, and two ends of the connecting rod (302) are respectively connected with the middle parts of the two supporting rods (301);

one end of each of the two support rods (301) is hinged to the edge of the corresponding protrusion (103), the other end of each of the two support rods (301) is connected with the slip body (20), and the other end of each of the telescopic rods (40) is hinged to the corresponding connecting rod (302).

10. The sucker rod slip of claim 9, wherein one end of the support rod (301) is hinged to the protrusion (103) by a first bolt (304), and a gasket (303) is provided between the support rod (301) and the protrusion (103) along the extending direction of the first bolt (304).

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