CN220378229U - Oil pipe clamping device - Google Patents

Abstract

The application provides an oil pipe clamp relates to gas lift plunger clamping device technical field. The central tube is sleeved outside the core rod, the limiting sleeve, the elastic piece, the first propping sleeve and the second propping sleeve are sequentially sleeved outside the central tube, the limiting sleeve is arranged at the bottom of the central tube, one end of the elastic piece is propped against the limiting sleeve, the other end of the elastic piece is propped against the first propping sleeve, and the elastic piece has a first release stroke; one end of the slip is movably connected with one end of the first propping sleeve far away from the limiting sleeve, the other end of the slip is rotatably connected with the second propping sleeve, in the first state, the elastic piece is in a compressed state, one end of the first locking block far away from the core rod is positioned in the mounting groove, and in the vertical direction, the projection of the slip is positioned in the projection of the first propping sleeve; in the second state, the elastic piece is in a first release stroke, the projection of the first locking block is located in the projection of the core rod in the vertical direction, and the projection of the slips is at least partially located outside the first propping sleeve and is used for propping against the inner wall of the oil pipe.

Description

Oil pipe clamping device

Technical Field

The application relates to the technical field of gas lift plunger clamping devices, in particular to an oil pipe clamping device.

Background

Plunger gas lift is an intermittent manual lifting method that uses reservoir energy (formation gas or injection gas) to carry liquid. The method can fully utilize the energy of stratum, and as a solid sealing interface is provided between the lifted gas and lifted liquid carrier, the channeling of the gas and the falling back of the liquid are reduced, thereby effectively improving the lifting efficiency and being beneficial to improving the yield of related wells. The method is particularly suitable for oil extraction wells with high gas-liquid ratio. For the conventional intermittent gas lifting well with low efficiency and unobvious effect, the plunger gas lifting can improve the production efficiency and avoid the invalid consumption of gas.

However, in the conventional gas lift plunger liquid drainage gas production process, the falling depth of the gas lift plunger is determined by the falling position of the coupling clamp, and under the condition that the stratum energy is insufficient to enable the gas lift plunger to fall to a certain depth, the gas lift plunger can not reach the position of the coupling clamp, so that the circulating operation can not be formed. And, because the position adjustment of coupling fastener is the length that needs to correspond to single festival oil pipe, its position adjustment flexibility is not high, and is not high with the degree of matching of gas lift plunger falling depth, the problem of invalid operation appears easily.

Disclosure of Invention

In order to solve the technical problems in the related art, the application provides an oil pipe clamp. The coupling clamp can be clamped at any position in an oil pipe, can effectively solve the problem that the position adjustment of the existing coupling clamp is inflexible, and is beneficial to perfecting the plunger gas lift process.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

an oil pipe clamp is used for clamping a downhole gas lift plunger and comprises a core rod, a central pipe, a limiting sleeve, an elastic piece, a first propping sleeve, a first locking block, slips and a second propping sleeve;

the core rod is formed into a rod-shaped structure, the central pipe is sleeved outside the core rod, in the vertical direction, the limiting sleeve, the elastic piece, the first propping sleeve and the second propping sleeve are sequentially sleeved outside the central pipe, wherein the limiting sleeve is arranged at the bottom of the central pipe, one end of the elastic piece is propped against the limiting sleeve, the other end of the elastic piece is propped against the first propping sleeve, the elastic piece is provided with a first release stroke, the inner wall of the first propping sleeve is provided with a mounting groove, the central pipe is provided with a first penetrating through hole corresponding to the mounting groove, the first locking block is movably penetrated in the first penetrating through hole, and one end of the first locking block extends to the mounting groove and the other end of the first locking block is mounted on the core rod; one end of the slip is movably connected with one end of the first propping sleeve, which is far away from the limiting sleeve, and the other end of the slip is rotatably connected with the second propping sleeve;

the oil pipe clamp comprises a first state and a second state, wherein in the first state, the elastic piece is in a compressed state, one end of the first locking block, which is far away from the core rod, is positioned in the mounting groove, and in the vertical direction, the projection of the slip is positioned in the projection of the first abutting sleeve; in the second state, the elastic piece is in a first release stroke, in the vertical direction, the projection of the first locking block is positioned in the projection of the core rod, and the projection of the slip is at least partially positioned outside the first propping sleeve and is used for propping against the inner wall of the oil pipe.

Optionally, the first propping sleeve comprises a first sleeve body and a second sleeve body which are coaxially connected, the radial dimension of the first sleeve body is smaller than that of the second sleeve body, one end of the first sleeve body, which is far away from the second sleeve body, is propped against the limiting sleeve, and one end of the elastic piece is propped against the limiting sleeve, and the other end of the elastic piece is propped against the second sleeve body.

Optionally, the mounting groove is formed on the inner wall of the second sleeve body.

Optionally, the elastic member is provided as a spring, and a projection of the elastic member falls within a projection of the second sleeve in a vertical direction.

Optionally, the second abutment sleeve comprises a wedge portion comprising a first end close to the first abutment sleeve, a second end distant from the first abutment sleeve, and a connecting peripheral wall between the first end and the second end, the radial dimension of the first end being smaller than the radial dimension of the second end, and the radial dimension of the connecting peripheral wall gradually increasing in a direction from the first end towards the second end;

one end of the slip is rotatably connected to the connecting peripheral wall, and the side surface, close to the core rod, of the slip abuts against the connecting peripheral wall.

Optionally, the slip comprises a first connecting section and a second connecting section which are oppositely arranged, and an abutting section connected between the first connecting section and the second connecting section;

the first connecting section is formed into a T-shaped structure, the first propping sleeve is provided with a sliding groove matched with the first connecting section, the second connecting section is rotatably connected with the second propping sleeve, and the propping section is used for propping against the inner wall of the oil pipe; and/or the number of the groups of groups,

the second connecting section is formed into a T-shaped structure, the end face, far away from the first connecting section, of the T-shaped structure is formed into an arc-shaped surface, and the second propping sleeve is provided with a rotating groove which is mutually matched with the second connecting section.

Optionally, a unidirectional sawtooth structure is formed on the side surface of the propping section away from the core rod, so as to be used for propping against the inner wall of the oil pipe.

Optionally, three slips are provided, and the three slips are uniformly spaced along the circumference of the mandrel.

Optionally, the oil pipe fastener further includes a fishing head and a second locking block, the fishing head is sleeved outside the central pipe, an annular groove is provided on an inner wall of a bottom of the fishing head, an annular bump matched with the groove is provided at a top of the second propping sleeve, a second through hole and a third through hole which are coaxial are respectively formed at the bottom of the fishing head and the top of the second propping sleeve, the second locking block sequentially penetrates through the second through hole, the third through hole and is connected to the central pipe, and the second locking block is configured to be sheared by the jar;

the elastic piece is further provided with a second release stroke, the oil pipe clamp further comprises a third state, in the third state, the second locking block is in a broken state, the elastic piece is in the second elastic release stroke, the projection of the slip is located in the projection of the second abutting sleeve, and one end of the first locking block is located in the mounting groove.

Optionally, the oil pipe clamp further comprises a spring claw sleeve sleeved on the core rod, the spring claw sleeve comprises a first clamping block, a second clamping block and a connecting block, the first clamping block and the second clamping block are oppositely arranged, the connecting block is connected between the first clamping block and the second clamping block, a first clamping groove for clamping the first clamping block is formed in the core rod, and a second clamping groove for clamping the second clamping block is formed in the central pipe;

in the first state and the third state, the first clamping block and the second clamping block are respectively in clamping states with the first clamping groove and the second clamping groove; in the second state, the first clamping block and the second clamping block are respectively separated from the first clamping groove and the second clamping groove.

The beneficial effects are that:

1. through above-mentioned technical scheme, this oil pipe fastener of this application when the whereabouts is to predetermineeing the position, can be with the help of the produced inertial action of "sudden braking", make core bar and center tube produce relative motion, at core bar and center tube relative motion's in-process, first locking piece is extruded and to the inside shrink removal of core bar, like this, first locking piece just will release the spacing effect to core bar, center tube and first supporting cover, simultaneously, the second supporting cover still remains in the normal position, at this moment, under the effect of elastic component, first supporting cover just will upwards move, and promote the slips and open (i.e. the slips is close to oil pipe inner wall with the connecting portion of first supporting cover), can make the slips supporting in oil pipe inner wall. Therefore, the oil pipe clamp can be clamped in the oil pipe.

That is, through the oil pipe clamp of this application, can realize that the oil pipe clamp can realize the card in the optional position of oil pipe, can solve current coupling clamp position adjustment inflexible problem effectively, be favorable to perfect plunger gas lift technology.

2. Other benefits or advantages of the present application will be described in detail with reference to specific structures in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art. Furthermore, it should be understood that the scale of each component in the drawings in this specification is not represented by the scale of actual material selection, but is merely a schematic diagram of structures or positions, in which:

FIG. 1 is a schematic illustration of a partially cut-away construction of an oil line latch provided in an exemplary embodiment of the present application;

FIG. 2 is an enlarged schematic view of a partial structure at A in FIG. 1;

FIG. 3 is an enlarged schematic view of a partial structure at B in FIG. 1;

fig. 4 is an enlarged schematic view of a partial structure at C in fig. 1.

The reference numerals in the drawings indicate:

100-an oil pipe clamp; 11-core bar; 12-a central tube; 121-a first through hole; 13-a limit sleeve; 14-an elastic member; 15-a first abutting sleeve; 151-mounting slots; 152-a first sleeve; 153-a second sleeve; 16-a first locking block; 17-slips; 171-a first connection section; 172-a second connecting section; 173-an abutment section; 18-a second abutting sleeve; 181-a first end; 182-a second end; 183-connecting peripheral walls; 184-annular bump; 19-a fishing head; 191-an annular groove; 20-a second locking block; 21-a spring jaw sleeve; 211-a first clamping block; 212-a second clamping block; 213-connection block.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be noted that terms such as "top" and "bottom" are used to refer to the portion of the tubing fastener that faces upward in the use state of the present application as the top and the portion that faces downward as the bottom; the term used, for example, "vertical direction" refers to the direction along which the tubing latch of the present application, in the use state, is in the vertical direction; the use of terms such as "first" and "second" is for the purpose of distinguishing between similar elements and not necessarily for the purpose of indicating or implying any particular importance or order of such elements; terms such as "inner", "outer" and "inner and outer" are used to refer to specific contours. The above terms are used only for the sake of clarity and simply to describe the technical solutions of the present application, and should not be construed as limiting the present application.

In order to facilitate the technical solution of the present application to be more clearly understood by the relevant technical personnel, the technical problems existing in the prior art will be described in detail.

At present, a coupling clamp which is usually used is fixed at a coupling of an oil pipe (generally, the length of a single oil pipe is about 10 meters), and correspondingly, the position of the coupling clamp is adjusted, namely, the length of the single oil pipe is taken as a space, so that the problem that the coupling clamp is not high in adaptation degree with a gas lift plunger and invalid operation is easy to occur is likely to exist.

In view of this, this application provides a brand-new oil pipe fastener, and it can block in the arbitrary position in oil pipe, can solve current coupling fastener position adjustment inflexible problem effectively, is favorable to improving plunger gas lift technology.

The following describes the technical scheme of the present application in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 4, the present embodiment provides an oil pipe clamp 100 for clamping a downhole gas lift plunger, which comprises a core rod 11, a central pipe 12, a limit sleeve 13, an elastic member 14, a first propping sleeve 15, a first locking block 16, slips 17 and a second propping sleeve 18; the core rod 11 is formed into a rod-shaped structure, the central tube 12 is sleeved outside the core rod 11, the limiting sleeve 13, the elastic piece 14, the first propping sleeve 15 and the second propping sleeve 18 are sequentially sleeved outside the central tube 12 in the vertical direction, wherein the limiting sleeve 13 is arranged at the bottom of the central tube 12, one end of the elastic piece 14 is propped against the limiting sleeve 13, the other end of the elastic piece 14 is propped against the first propping sleeve 15, the elastic piece 14 has a first release stroke, the inner wall of the first propping sleeve 15 is provided with a mounting groove 151, the central tube 12 is provided with a first penetrating through hole 121 corresponding to the mounting groove 151, the first locking block 16 is movably penetrated in the first penetrating through hole 121, one end of the first locking block 16 extends to the mounting groove 151, and the other end of the first locking block 16 is mounted on the core rod 11; one end of the slip 17 is movably connected with one end of the first propping sleeve 15 away from the limiting sleeve 13, and the other end of the slip 17 is rotatably connected with the second propping sleeve 18;

wherein the tubing latch 100 comprises a first state and a second state, in the first state, the elastic member 14 is in a compressed state, one end of the first locking block 16, which is far away from the core rod 11, is positioned in the mounting groove 151, and in the vertical direction, the projection of the slips 17 is positioned in the projection of the first abutting sleeve 15; in the second state, the elastic member 14 is in the first release stroke, the projection of the first locking block 16 is located within the projection of the mandrel 11 in the vertical direction, and the projection of the slips 17 is located at least partially outside the first abutment sleeve 15 for abutment with the inner wall of the tubing.

Through the above technical scheme, when the oil pipe fastener 100 of the present application falls to the preset position, the core rod 11 and the center pipe 12 can generate relative motion by means of the inertia effect generated by the sudden braking, and in the process of the relative motion of the core rod 11 and the center pipe 12, the first locking block 16 is extruded and contracts and moves towards the inside of the core rod 11, so that the first locking block 16 releases the limiting effect on the core rod 11, the center pipe 12 and the first propping sleeve 15, and meanwhile, the second propping sleeve 18 remains in place, at this time, under the action of the elastic element 14, the first propping sleeve 15 moves upwards and pushes the slips 17 to open (namely, the connection part of the slips 17 and the first propping sleeve 15 approaches to the inner wall of the oil pipe), i.e. the slips 17 can be propped against the inner wall of the oil pipe. Thus, the oil pipe locking device 100 of the present application can be locked in the oil pipe.

That is, through the oil pipe clamp 100 of the application, the oil pipe clamp 100 can be clamped at any position of an oil pipe, the problem that the position adjustment of the existing coupling clamp is inflexible can be effectively solved, and the improvement of a plunger gas lift process is facilitated.

To facilitate the installation of the elastic body, in one embodiment of the present application, as shown in fig. 1, the first propping sleeve 15 of the present application may include a first sleeve body 152 and a second sleeve body 153 coaxially connected, where a radial dimension of the first sleeve body 152 is smaller than a radial dimension of the second sleeve body 153, one end of the first sleeve body 152 away from the second sleeve body 153 is propped against the stop collar 13, and one end of the elastic member 14 is propped against the stop collar 13, and the other end is propped against the second sleeve body 153.

In this way, on the one hand, the elastomer can be very conveniently mounted outside the first sleeve 152, and can smoothly form an abutting relationship with the stop collar 13 and the second sleeve 153; on the other hand, the first sleeve 152 of the present application may also serve as a guide for the elongation direction of the elastic body, so that the first abutment sleeve 15 can reliably push the slips 17 open in a preset direction.

In one embodiment of the present application, referring to fig. 4, the mounting groove 151 of the present application may be formed on an inner wall of the second sleeve 153. In this way, not only can the relative locking of the positions of the core rod 11, the central tube 12 and the first abutment sleeve 15 be reliably facilitated by the first locking block 16, but also the structural influence of the provision of the mounting groove 151 on the first abutment sleeve 15 can be effectively reduced due to the greater wall thickness of the second sleeve 153 relative to the first sleeve 152.

In one embodiment of the present application, as shown in fig. 1, the elastic member 14 of the present application may be provided as a spring, and the projection of the elastic member 14 falls within the projection of the second sleeve 153 in the vertical direction. In one aspect, the spring has better spring properties, longer service life, and more excellent environmental flexibility than other alternative spring structures (e.g., plastic elastomers, silicone elastomers, shrapnel, etc.). On the other hand, when the spring is elastically deformed, the radial deformation degree is smaller, so that the contact with the outer wall of the oil pipe in space can be effectively avoided, that is, the elastic piece 14 is arranged as the spring, and the oil pipe clamp 100 can be smoothly fallen down or moved up in the oil pipe.

In one embodiment of the present application, the second abutment sleeve 18 of the present application may comprise a wedge-shaped portion comprising a first end 181 close to the first abutment sleeve 15, a second end 182 distant from the first abutment sleeve 15, and a connecting peripheral wall 183 between the first end 181 and the second end 182, the radial dimension of the first end 181 being smaller than the radial dimension of the second end 182, and the radial dimension of the connecting peripheral wall 183 gradually increasing in a direction from the first end 181 toward the second end 182; one end of the slip 17 is rotatably connected to the connection peripheral wall 183, and a side of the slip 17 near the stem 11 abuts against the connection peripheral wall 183.

Through the second that so set up supports top cover 18, can form the direction to the direction of opening of slips 17 to slips 17 can open along preset direction and can support on the inner wall of oil pipe relatively accurately, so that the oil pipe fastener 100 of this application can be comparatively quick and the arbitrary position of accurate card in oil pipe.

In one embodiment of the present application, as shown in fig. 1, the slips 17 of the present application may include oppositely disposed first and second connection segments 171, 172, and an abutment segment 173 connected between the first and second connection segments 171, 172; the first connection section 171 is formed into a T-shaped structure, the first propping sleeve 15 is provided with a sliding groove matched with the first connection section 171, the second connection section 172 is rotatably connected to the second propping sleeve 18, and the propping section 173 is used for propping against the inner wall of the oil pipe; and/or, the second connecting section 172 is formed into a T-shaped structure, and an end surface of the T-shaped structure far away from the first connecting section 171 is formed into an arc surface, and the second abutting sleeve 18 is provided with a rotating groove mutually matched with the second connecting section 172.

Thus, in one aspect, the slips 17 can smoothly rotate around the second connecting segment 172 under the pushing action of the first propping sleeve 15, and the propping segment 173 can be propped against the inner wall of the oil pipe more reliably. On the other hand, the first connecting section 171 with the T-shaped structure provided by the present application can effectively avoid the first connecting section 171 from falling out of the sliding groove on the basis of ensuring that the first connecting section 171 can slide smoothly in the sliding groove. In yet another aspect, the second connecting segment 172 provided in the present application is formed into a T-shaped structure and further has the above-mentioned arcuate surface, so that the slip 17 can be ensured to rotate smoothly around the second connecting segment 172, and the problem that the second connecting segment 172 is separated from the rotating groove can be effectively avoided.

In one embodiment of the present application, as shown in fig. 1, the abutment section 173 of the present application may be formed with a one-way saw tooth structure on the side facing away from the core pin 11 for abutment with the inner wall of the oil pipe. Like this, the frictional force between slips 17 and the oil pipe inner wall can be promoted effectively to the one-way sawtooth structure of so setting to can promote the card stability of the oil pipe card ware 100 of this application to a certain extent.

In one embodiment of the present application, the slips 17 of the present application may be provided in three, the three slips 17 being uniformly spaced along the circumference of the mandrel 11. Thus, not only can the slips 17 be effectively made on the basis of forming a well-stable propped state with the oil pipe, but also larger friction force can be provided between the slips 17 and the inner wall of the oil pipe, so that the locking stability of the oil pipe locking device 100 can be further improved.

In order to facilitate the fishing of the oil pipe clamp 100 of the present application, in one embodiment of the present application, as shown in fig. 1 and 2, the oil pipe clamp 100 of the present application may further include a fishing head 19 and a second locking block 20, the fishing head 19 is sleeved outside the central pipe 12, an annular groove 191 is provided on an inner wall of a bottom of the fishing head 19, an annular bump 184 matching with the groove is provided at a top of the second propping sleeve 18, a second through hole and a third through hole which are coaxial are respectively formed at a bottom of the fishing head 19 and a top of the second propping sleeve 18, the second locking block 20 is sequentially arranged through the second through hole, the third through hole and connected to the central pipe 12, and the second locking block 20 is configured to be able to be sheared by the jar; the elastic member 14 further has a second release stroke, the tubing latch 100 further includes a third state in which the second locking block 20 is in a broken state, the elastic member 14 is in the second elastic release stroke, the projection of the slip 17 is located in the projection of the second abutment sleeve 18, and one end of the first locking block 16 is located in the mounting groove 151.

In this way, the salvaging head 19 can be captured by the existing salvaging barrel, and then the second locking block 20 is sheared by the jar arranged on the salvaging barrel, so that the relative positions of the salvaging head 19, the second propping sleeve 18 and the central tube 12 can be changed under the action of the elastic piece 14, that is, the second propping sleeve 18 can move upwards under the pushing action of the elastic piece 14, so that the open state of the slips 17 is released (that is, the slips 17 are separated from the propped state with the inner wall of the oil tube), and in the process of pulling the oil tube clamp 100 out of the oil tube, the slips 17 can not prop against the inner wall of the oil tube, and the oil tube clamp 100 can be pulled out of the oil tube smoothly.

In one embodiment of the present application, as shown in fig. 1 and 2, the oil pipe clamp 100 of the present application may further include a spring claw sleeve 21 sleeved on the core rod 11, where the spring claw sleeve 21 includes a first clamping block 211 and a second clamping block 212 that are oppositely disposed, and a connecting block 213 connected between the first clamping block 211 and the second clamping block 212, a first clamping groove for clamping the first clamping block 211 is formed on the core rod 11, and a second clamping groove for clamping the second clamping block 212 is formed on the central tube 12; wherein, in the first state and the third state, the first clamping block 211 and the second clamping block 212 are respectively in clamping states with the first clamping groove and the second clamping groove; in the second state, the first clamping block 211 and the second clamping block 212 are separated from the first clamping groove and the second clamping groove, respectively.

Thus, the spring claw sleeve 21 provided in this way can lock the oil pipe locking device 100 of the present application in the first state and the third state relatively stably, so that not only the oil pipe locking device can descend in the oil pipe relatively smoothly, but also the oil pipe locking device 100 can ascend in the oil pipe relatively smoothly.

For the convenience of understanding of the relevant person, the following describes in more detail the working procedure/working principle in an exemplary embodiment of the present application with reference to fig. 1: (it should be noted that, in this embodiment, the elastic member 14 is provided as a spring, and the second locking block 20 is provided as a shear pin)

Referring to fig. 1, when the oil pipe clamp 100 is required to be lowered to a preset position of an oil pipe, the top of the oil pipe clamp 100 of the present application can be connected in series with a tool to be lowered, the tool to be lowered is placed into the oil pipe by using an instrument truck, when the oil pipe clamp 100 is lowered to the preset position, the instrument truck is immediately braked suddenly, the core rod 11, the central pipe 12 and the elastic claw sleeve are made to generate relative motion by inertia, namely, the second clamping block 212 of the spring claw sleeve 21 is separated from the second clamping groove on the central pipe 12, meanwhile, the first locking block 16 is retracted towards the inner direction of the core rod 11, when the first locking block 16 is completely moved out of the first through hole 121 of the central pipe 12, the first propping sleeve 15 pushes the slips 17 upwards under the action of the spring, and the slips 17 are made to be opened to a state propped against the inner wall of the oil pipe, under the continuous action of the spring force, the slips 17 can be firmly propped against the inner wall of the oil pipe and can not be released, and the well is continuously lifted up, and the oil pipe clamp 100 is pulled out, thus completing the process of releasing the oil pipe clamp.

When the oil pipe clamp 100 needs to be taken out, an overshot is put into the oil pipe, when the overshot is put down to the position of the oil pipe clamp 100, the overshot will drag the fishing head 19 under the action of dead weight, the jar is started while the logging steel wire is lifted up, so that the shear pin is broken, the second propping sleeve 18 loses the supporting effect, and moves up under the action of the elastic force of the spring, so that the slips 17 are restored to the initial state, namely the propping state of the slips 17 and the inner wall of the oil pipe is released, and at the moment, the oil pipe clamp 100 can be taken out by continuously lifting the logging steel wire.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.

Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein.

Claims (10)

1. An oil pipe clamp is used for clamping a downhole gas lift plunger and is characterized by comprising a core rod (11), a central pipe (12), a limiting sleeve (13), an elastic piece (14), a first propping sleeve (15), a first locking block (16), a slip (17) and a second propping sleeve (18);

the core rod (11) is formed into a rod-shaped structure, the central tube (12) is sleeved outside the core rod (11), in the vertical direction, the limiting sleeve (13), the elastic piece (14), the first propping sleeve (15) and the second propping sleeve (18) are sequentially sleeved outside the central tube (12), wherein the limiting sleeve (13) is arranged at the bottom of the central tube (12), one end of the elastic piece (14) is propped against the limiting sleeve (13) and the other end is propped against the first propping sleeve (15), the elastic piece (14) has a first release stroke, a mounting groove (151) is formed in the inner wall of the first propping sleeve (15), a first penetrating through hole (121) corresponding to the mounting groove (151) is formed in the central tube (12), the first locking block (16) is movably penetrated into the first penetrating through hole (121), and one end of the first locking block (16) is propped against the first propping sleeve (15), and the other end of the first locking block (16) is extended to the core rod (11) and is mounted on the other end of the core rod (11); one end of the slip (17) is movably connected with one end of the first propping sleeve (15) far away from the limiting sleeve (13), and the other end of the slip (17) is rotatably connected with the second propping sleeve (18);

wherein the oil pipe clamp (100) comprises a first state and a second state, in the first state, the elastic piece (14) is in a compressed state, one end of the first locking block (16) far away from the core rod (11) is positioned in the mounting groove (151), and in the vertical direction, the projection of the slip (17) is positioned in the projection of the first propping sleeve (15); in the second state, the elastic piece (14) is in a first release stroke, the projection of the first locking block (16) is positioned in the projection of the core rod (11) in the vertical direction, and the projection of the slip (17) is at least partially positioned outside the first propping sleeve (15) for propping against the inner wall of the oil pipe.

2. -oil pipe clamp according to claim 1, characterised in that the first abutment sleeve (15)

Including coaxial coupling's first cover body (152) and second cover body (153), the radial dimension of first cover body (152) is less than the radial dimension of second cover body (153), first cover body (152) keep away from the one end of second cover body (153) with stop collar (13) support, one end of elastic component (14) with stop collar (13) support, the other end with second cover body (153) support.

3. The oil pipe clamp as claimed in claim 2, wherein the mounting groove (151) is provided on an inner wall of the second sleeve (153).

4. Tubing latch according to claim 2, characterized in that the elastic member (14) is provided as a spring and that the projection of the elastic member (14) falls within the projection of the second sleeve (153) in the vertical direction.

5. The oil pipe clamp according to claim 1, characterized in that the second abutment sleeve (18) comprises a wedge-shaped portion comprising a first end (181) close to the first abutment sleeve (15), a second end (182) remote from the first abutment sleeve (15), and a connecting circumferential wall (183) between the first end (181) and the second end (182), the radial dimension of the first end (181) being smaller than the radial dimension of the second end (182), and the radial dimension of the connecting circumferential wall (183) gradually increasing in a direction from the first end (181) to the second end (182);

wherein one end of the slip (17) is rotatably connected to the connection peripheral wall (183), and a side surface of the slip (17) near the core bar (11) abuts against the connection peripheral wall (183).

6. The tubing clamp according to any one of claims 1-5, wherein the slip (17) comprises oppositely arranged first and second connection segments (171, 172), and an abutment segment (173) connected between the first and second connection segments (171, 172);

wherein the first connecting section (171) is formed into a T-shaped structure, and the first abutting sleeve (15) is opened

The sliding groove matched with the first connecting section (171) is arranged, the second connecting section (172) is rotatably connected to the second propping sleeve (18), and the propping section (173) is used for propping against the inner wall of the oil pipe; and/or the number of the groups of groups,

the second connecting section (172) is of a T-shaped structure, the end face, far away from the first connecting section (171), of the T-shaped structure is of an arc-shaped surface, and the second abutting sleeve (18) is provided with a rotating groove which is mutually matched with the second connecting section (172).

7. The oil pipe clamp according to claim 6, characterized in that the side of the abutment section (173) facing away from the core pin (11) is formed with a one-way saw-tooth structure for abutment against the inner wall of the oil pipe.

8. The oil pipe clamp according to claim 6, characterized in that three slips (17) are provided, the three slips (17) being arranged at regular intervals along the circumference of the mandrel (11).

9. The oil pipe clamp according to any one of claims 1-5, wherein the oil pipe clamp (100) further comprises a fishing head (19) and a second locking block (20), the fishing head (19) is sleeved outside the central pipe (12), an annular groove (191) is formed in the inner wall of the bottom of the fishing head (19), an annular protruding block (184) matched with the groove is formed at the top of the second propping sleeve (18), a second through hole and a third through hole which are coaxial are respectively formed at the bottom of the fishing head (19) and the top of the second propping sleeve (18), the second locking block (20) sequentially penetrates through the second through hole, the third through hole and is connected to the central pipe (12), and the second locking block (20) is configured to be sheared by a jar;

wherein the elastic member (14) further has a second release stroke, the tubing latch (100) further comprises a third state in which the second locking block (20) is in a broken state, the elastic member (14) is in the second elastic release stroke, and the projection of the slips (17) is located at the first position

And one end of the first locking block (16) is positioned in the mounting groove (151) in the projection of the two propping sleeves (18).

10. The oil pipe clamp according to claim 9, wherein the oil pipe clamp (100) further comprises a spring claw sleeve (21) sleeved on the core rod (11), the spring claw sleeve (21) comprises a first clamping block (211) and a second clamping block (212) which are oppositely arranged, and a connecting block (213) connected between the first clamping block (211) and the second clamping block (212), a first clamping groove for clamping the first clamping block (211) is formed in the core rod (11), and a second clamping groove for clamping the second clamping block (212) is formed in the central pipe (12);

wherein, in the first state and the third state, the first clamping block (211) and the second clamping block (212) are respectively in clamping states with the first clamping groove and the second clamping groove; in the second state, the first clamping block (211) and the second clamping block (212) are separated from the first clamping groove and the second clamping groove respectively.