Heat preservation connecting pipe pulling device

Abstract

The utility model provides a heat preservation connecting pipe tripping device, which relates to the field of oil extraction equipment, and comprises a first limiting device, a clamping device and a fastening device, the upper surface of the first limiting device is provided with a first through hole and a first limiting groove, and the first limiting device is used for being fixed above a wellhead; the lower end of the first heat preservation connecting pipe can penetrate through the first through hole and be lowered into the shaft. The clamping device is arranged on the side, away from the wellhead, of the first limiting device, the clamping device is used for clamping the upper end of the first heat preservation connecting pipe, at least part of the clamping device can be arranged in the first limiting groove, and the first limiting groove can limit downward movement of the clamping device and rotation around the axis of the first heat preservation connecting pipe; the fastening device is used for enabling the second heat preservation connecting pipe above the first heat preservation connecting pipe to rotate around the axis of the second heat preservation connecting pipe so as to achieve threaded connection or threaded disassembly of the lower end of the second heat preservation connecting pipe and the upper end of the first heat preservation connecting pipe. The structure is simple and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil extraction equipment technical field especially relates to a heat preservation connecting pipe hoisting device. BACKGROUND

[0002] In order to ensure that the crude oil at the bottom of the well is lifted to the ground, the wellbore needs to be heated to reduce the viscosity of the crude oil and improve the flow capacity of the crude oil in the tubing; And it can improve the solubility of wax, and facilitate wax removal. At present, hot water or steam and other media are introduced into the wellbore through the heat preservation pipe to realize the heating of the wellbore. Among them, the heat preservation pipe is divided into two forms of heat preservation continuous pipe and heat preservation connecting pipe, the heat preservation continuous pipe is a whole pipe structure, the single length reaches more than one thousand meters, and the heat preservation continuous pipe of the required length is lowered into the wellbore or lifted out of the wellbore by special large equipment and vehicles; The length of the heat preservation connecting pipe is 6-10 meters, and it needs to be assembled according to the depth of the wellbore. At present, there is no standard device for lifting and lowering the heat preservation connecting pipe, therefore, a heat preservation connecting pipe hoisting device is urgently needed. SUMMARY

[0003] The utility model aims at providing a heat preservation connecting pipe hoisting device to solve the problems existing in the prior art, which can be used for the hoisting operation of the heat preservation connecting pipe assembled in the form of threads, and has the advantages of simple structure and easy operation.

[0004] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0005] The utility model provides a heat preservation connecting pipe hoisting device, which comprises a first limiting device, a clamping device and a fastening device, wherein:

[0006] The upper surface of the first limiting device is provided with a first through hole and a first limiting groove, the first limiting device is used for being fixed above the wellhead, the first through hole is used for the first heat preservation connecting pipe to pass through, and the lower end of the first heat preservation connecting pipe can pass through the first through hole and be lowered into the wellbore;

[0007] The clamping device is arranged on the side of the first limiting device away from the wellhead, the clamping device is used for clamping the upper end of the first heat preservation connecting pipe, at least part of the clamping device can be arranged in the first limiting groove, the inner bottom wall of the first limiting groove can limit the downward movement of the clamping device by contacting the outer wall of the clamping device, and the inner side wall of the first limiting groove can limit the rotation of the clamping device around the axis of the first heat preservation connecting pipe by contacting the outer wall of the clamping device;

[0008] The fastening device is used to rotate the second heat preservation connecting pipe above the first heat preservation connecting pipe around the axis of the second heat preservation connecting pipe, so as to realize the threaded connection or threaded disconnection between the lower end of the second heat preservation connecting pipe and the upper end of the first heat preservation connecting pipe.

[0009] Preferably, the hanging device is further provided, which is detachably connected with the second heat preservation connecting pipe and is connected with the hoisting equipment.

[0010] Preferably, the hanging device comprises a hanging body and a slot switch, one side of the hanging body is provided with a second limiting groove, the slot switch is arranged at the slot of the second limiting groove, and the slot switch can open or close the slot of the second limiting groove; recesses are arranged on the outer sidewalls of the first heat preservation connecting pipe and the second heat preservation connecting pipe; the pipe segment where the recess of the second heat preservation connecting pipe is located can enter the second limiting groove through the slot, the upper end of the hanging body can be in contact with the inner top wall of the recess to limit the downward movement of the second heat preservation connecting pipe, and the slot switch can limit the movement of the second heat preservation connecting pipe away from the groove bottom wall of the second limiting groove.

[0011] Preferably, the slot switch comprises a telescopic device, the telescopic device is fixedly connected to the slot of the hanging body, and the output end of the telescopic device can be telescoped between a first position and a second position; when the output end of the telescopic device is located at the first position, the output end of the telescopic device can close the slot; and when the output end of the telescopic device is located at the second position, the output end of the telescopic device can open the slot.

[0012] Preferably, the telescopic device comprises a shell, an elastic component and a telescopic shaft, the shell is a cylindrical shell with an opening at one end; the telescopic shaft comprises a first shaft segment and a second shaft segment connected with each other, the diameter of the first shaft segment is greater than that of the second shaft segment; the shell is sleeved outside the second shaft segment, the elastic component is arranged between the end face of the first shaft segment close to the second shaft segment and the inner bottom wall of the shell; and the first shaft segment can be moved to the second position under the action of external force and make the elastic component compressed, and the first shaft segment can be moved to the first position under the action of the restoring force of the elastic component.

[0013] Preferably, the slot switch further comprises a limiting sheet, the limiting sheet is fixedly connected to one end of the shell away from the opening of the shell, second through holes are arranged on the bottom wall of the shell and the limiting sheet, one end of the second shaft segment away from the first shaft segment can pass through the second through holes of the shell and the limiting sheet and extend to the outside of the shell, and the outer sidewall of the second shaft segment is in sliding connection with the inner sidewall of the limiting sheet.

[0014] Preferably, the outer side wall of the first shaft section is in sliding connection with the inner side wall of the outer shell.

[0015] Preferably, the slot switch further comprises a limiting sleeve, the limiting sleeve is fixedly connected with the hanging body, and the limiting sleeve is oppositely arranged with the output end of the telescopic device; when the output end of the telescopic device is located at the first position, the output end of the telescopic device is inserted into the inner cavity of the limiting sleeve, and the inner side wall of the limiting sleeve can limit the movement of the telescopic device along the direction perpendicular to the telescopic direction.

[0016] Preferably, the center line of the second limiting groove is perpendicular to the telescopic direction of the telescopic device.

[0017] Preferably, the hanging device further comprises a hook, both free ends of the hook are fixedly connected with the hanging body; the clamping device and the fastening device are both spanners; and the first limiting device is a hollow sucker rod tray.

[0018] Compared with the prior art, the utility model discloses the following technical effects:

[0019] The utility model discloses a kind of heat preservation connecting pipe tripping device, including first limiting device, clamping device and fastening device, wherein: first limiting device is equipped with first through-hole and first limiting groove, first limiting device is used to be fixed on wellhead, first through-hole is used to pass first heat preservation connecting pipe, and the lower end of first heat preservation connecting pipe can pass through first through-hole and be lowered to wellbore;Clamping device is arranged on the side of first limiting device away from wellhead, clamping device is used to clamp the upper end of first heat preservation connecting pipe, and at least part of clamping device can be located in first limiting groove, the inner bottom wall of first limiting groove can be limited by the contact of the outer wall of clamping device to limit the movement of clamping device downwards, and the inner side wall of first limiting groove can be limited by the contact of the outer wall of clamping device to limit the rotation of clamping device around the axis of first heat preservation connecting pipe;Fastening device is used to make the second heat preservation connecting pipe above first heat preservation connecting pipe rotate around the axis of second heat preservation connecting pipe, to realize the threaded connection or threaded disassembly of the lower end of second heat preservation connecting pipe and the upper end of first heat preservation connecting pipe.

[0020] The heat preservation connecting pipe tripping device provided by the utility model can be used for the tripping operation of heat preservation connecting pipe assembled in threaded connection form, can be threaded connected or threaded disassembled to heat preservation connecting pipe during tripping or lowering, to realize the lifting tripping or lowering of all heat preservation connecting pipes, only need to support first heat preservation connecting pipe by clamping device and tighten or unscrew second heat preservation connecting pipe by fastening device during tripping and lowering, can complete operation, structure is simple, and it is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical schemes in the embodiments of the present application or in the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following only constitute some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 The structure diagram of the heat preservation connecting pipe tripping device provided by the present application is shown in the figure.

[0023] Figure 2 The structure diagram of the notch switch provided by the present application is shown in the figure.

[0024] In the figure: 100, heat preservation connecting pipe tripping device; 1, first limiting device; 101, first through hole; 102, first limiting groove; 2, clamping device; 3, fastening device; 4, first heat preservation connecting pipe; 5, second heat preservation connecting pipe; 6, hanging device; 601, hanging body; 602, second limiting groove; 603, shell; 604, elastic component; 605, first shaft section; 606, second shaft section; 607, limiting sheet; 608, second through hole; 609, limiting sleeve; 610, lifting hook; 611, baffle; 7, groove; 8, hollow sucker rod; 9, first flat square; 10, second flat square; 11, third flat square; 12, switch handle. DETAILED DESCRIPTION

[0025] The technical schemes in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present application.

[0026] The purpose of the present application is to provide a heat preservation connecting pipe tripping device to solve the problems in the prior art, which can be used for the tripping operation of the heat preservation connecting pipe assembled in the form of threaded connection, and has simple structure and is convenient to operate.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0028] As Figures 1-2As shown, the utility model provides a kind of heat preservation connecting pipe tripping device 100, including first limiting device 1, clamping device 2 and fastening device 3, wherein: the upper surface of first limiting device 1 is equipped with first through hole 101 and first limiting groove 102, first limiting device 1 is used to be fixed on the upper side of wellhead, first through hole 101 is used to pass first heat preservation connecting pipe 4, the lower end of first heat preservation connecting pipe 4 can pass through first through hole 101 and be lowered to wellbore, specifically, first heat preservation connecting pipe 4 is lowered to hollow sucker rod 8 after passing through first through hole 101;Clamping device 2 is set to the side of first limiting device 1 away from wellhead, clamping device 2 is used to clamp the upper end of first heat preservation connecting pipe 4, at least part of clamping device 2 can be located in first limiting groove 102, the inner bottom wall of first limiting groove 102 can be contacted with the outer wall of clamping device 2 to limit the downward movement of clamping device 2, the inner side wall of first limiting groove 102 can be contacted with the outer wall of clamping device 2 to limit the rotation of clamping device 2 around the axis of first heat preservation connecting pipe 4;Fastening device 3 is used to make the second heat preservation connecting pipe 5 above first heat preservation connecting pipe 4 rotate around the axis of second heat preservation connecting pipe 5, to realize the threaded connection or threaded disassembly of the lower end of second heat preservation connecting pipe 5 and the upper end of first heat preservation connecting pipe 4.It needs to be explained that the utility model is defined as first heat preservation connecting pipe 4 to the heat preservation connecting pipe lowered to wellbore, for connecting with the next heat preservation connecting pipe outside wellbore, i.e., in the process of heat preservation connecting pipe lowering, when second heat preservation connecting pipe 5 is lowered to wellbore, then it changes into first heat preservation connecting pipe 4, at this time, the next new heat preservation connecting pipe for splicing with first heat preservation connecting pipe 4 outside wellbore is new second heat preservation connecting pipe 5;Similarly, in the process of heat preservation connecting pipe lifting, when first heat preservation connecting pipe 4 in wellbore is lifted to outside wellbore, then it changes into second heat preservation connecting pipe 5, at this time, the next heat preservation connecting pipe connected in wellbore is new first heat preservation connecting pipe 4.

[0029] The heat preservation connecting pipe putting-down device 100 can be used for the putting-down operation of the heat preservation connecting pipe assembled in the threaded connection mode, can perform threaded connection or threaded disconnection on the heat preservation connecting pipe during the putting-out or putting-down process, and can realize the lifting putting-out or putting-down of multiple heat preservation connecting pipes, specifically: when the putting-down operation is performed, the first heat preservation connecting pipe 4 passes through the first through hole 101 and is put down into the wellbore, the upper end thereof is exposed above the first limiting device 1, the first heat preservation connecting pipe 4 is clamped by the clamping device 2, and the clamping device 2 is arranged in the first limiting groove 102, the inner bottom wall of the first limiting groove 102 can limit the clamping device 2, so that the first heat preservation connecting pipe 4 is kept in the vertical position at the position; the second heat preservation connecting pipe 5 is hoisted by the hook of the well passing machine or other hoisting equipment, the second heat preservation connecting pipe 5 is aligned with the first heat preservation connecting pipe 4, the second heat preservation connecting pipe 5 is driven to rotate around the axis thereof by the fastening device 3 (the hook is connected with the hoisting main body by a steel cable or the like, and the hook can rotate with the second heat preservation connecting pipe 5), at this time, since the first limiting groove 102 limits the rotation of the clamping device 2, the second heat preservation connecting pipe 5 can be screwed on the first heat preservation connecting pipe 4; the clamping device 2 is removed, and the second heat preservation connecting pipe 5 is put down; after the putting-down is completed, the above putting-down operation process is repeated, and the putting-down of the next second heat preservation connecting pipe 5 is performed. When the lifting operation is performed, the heat preservation connecting pipe in the wellbore is lifted to the outside of the wellbore by the hoisting equipment, at this time, the heat preservation connecting pipe is the second heat preservation connecting pipe 5, and the heat preservation connecting pipe connected with the lower end of the second heat preservation connecting pipe 5 is the first heat preservation connecting pipe 4, the upper end of the first heat preservation connecting pipe 4 is exposed above the first limiting device 1, the first heat preservation connecting pipe 4 is clamped by the clamping device 2, and the clamping device 2 is arranged in the first limiting groove 102, the inner bottom wall of the first limiting groove 102 can limit the clamping device 2 in the vertical direction, so that the first heat preservation connecting pipe 4 is kept in the position at the position; the second heat preservation connecting pipe 5 is driven to rotate in the reverse direction around the axis thereof by the fastening device 3, so as to unscrew the second heat preservation connecting pipe 5 from the first heat preservation connecting pipe 4; the clamping device 2 is removed; the first heat preservation connecting pipe 4 is lifted, and the above lifting operation process is repeated, so as to complete the lifting of multiple heat preservation connecting pipes. During the putting-out and putting-down process, only the first heat preservation connecting pipe 4 needs to be supported by the clamping device 2, and the second heat preservation connecting pipe 5 needs to be screwed or loosened by the fastening device 3, so as to complete the operation, and the structure is simple and convenient to operate.

[0030] In the utility model, the hanging device 6 is used for detachably fixed connection with the second heat preservation connecting pipe 5, and the hanging device 6 is used for connection with the hoisting equipment. The hoisting equipment and the hanging device 6 are preferably detachably connected, and the hoisting equipment hoists the second heat preservation connecting pipe 5 on the hanging device 6 through the hanging device 6.

[0031] The utility model discloses, the hanger 6 includes the hanger body 601 and the slot switch, one side of hanger body 601 is provided with the second limit groove 602, and the slot switch is set up in the slot of second limit groove 602, and the slot switch can open or close the slot of second limit groove 602, recess 7 is all provided on the outside wall of first heat preservation connecting pipe 4 and second heat preservation connecting pipe 5, the recess 7 of second heat preservation connecting pipe 5 can enter second limit groove 602 through the slot, and the upper end of hanger body 601 can be contacted with the inner top wall of recess 7 to restrict the movement of second heat preservation connecting pipe 5 to the down, and the slot switch can restrict the movement of second heat preservation connecting pipe 5 away from the slot bottom wall of second limit groove 602. Open the slot, make the recess 7 pipe section enter second limit groove 602 from the slot, and make the inner top wall of recess 7 contact with the upper end surface of hanger body 601, and the movement of second heat preservation connecting pipe 5 to the down is restricted through hanger body 601, to make second heat preservation connecting pipe 5 overlap in the upper of hanger body 601, close the slot, and second heat preservation connecting pipe 5 is restricted in second limit groove 602 through the slot switch, to prevent second heat preservation connecting pipe 5 from falling off from second limit groove 602.

[0032] The utility model discloses, the slot switch includes telescopic device, and telescopic device fixedly connected in the slot of hanger body 601, and the output of telescopic device can be telescopic between first position and second position, and the output of telescopic device can close the slot when the output of telescopic device is located at first position, and the output of telescopic device can open the slot when the output of telescopic device is located at second position.

[0033] The utility model discloses, telescopic device includes shell 603, elastic part 604 and telescopic shaft, and shell 603 is the cylinder of one end with opening, telescopic shaft includes the first axle section 605 and second axle section 606 that connect with each other, and the diameter of first axle section 605 is greater than the diameter of second axle section 606, shell 603 is covered in the second axle section 606, and elastic part 604 is set up between the end face of first axle section 605 close to second axle section 606 and the inner bottom wall of shell 603, and first axle section 605 can be moved to second position under the action of external force and make elastic part 604 compression, and first axle section 605 can be moved to first position under the action of the restoring force of elastic part 604. The end of first axle section 605 away from second axle section 606 is the output of telescopic device, and telescopic shaft can automatically close the slot under the restoring force of elastic part 604, and the structure is simple, and it is convenient to operate.

[0034] The utility model discloses, slot switch still includes limit piece 607, limit piece 607 fixedly connected with the one end of the opening of shell 603 far away from shell 603, and the bottom wall of shell 603 and limit piece 607 all are provided with second through -hole 608, and the second shaft section 606 far away from the one end of first shaft section 605 can pass through the second through -hole 608 of shell 603 and the second through -hole 608 of limit piece 607 and stretch to the outside of shell 603, and the outside wall of second shaft section 606 is slidably connected with the inside wall of limit piece 607, and limit piece 607 can be radially positioned to second shaft section 606, guarantees that first shaft section 605 can accurately move towards the direction of slot, guarantees the stability of movement.

[0035] The utility model discloses, the outside wall of first shaft section 605 is slidably connected with the inside wall of shell 603. The inside wall of shell 603 and limit piece 607 are radially positioned to the both ends of telescopic shaft respectively, further guarantee the linearity of first shaft section 605 movement and the stability of movement.

[0036] The utility model discloses, slot switch still includes limit sleeve 609, and limit sleeve 609 is fixedly connected with the hanging body 601, and limit sleeve 609 is opposite to the output of telescopic device, and when the output of telescopic device is located at first position, the output of telescopic device is inserted in the inner chamber of limit sleeve 609, and the inside wall of limit sleeve 609 can limit the movement of telescopic device along the direction perpendicular to telescopic direction. Further, limit sleeve 609 is opposite to the one end of first shaft section 605 far away from second shaft section 606, and when first shaft section 605 is inserted into limit sleeve 609, can close slot. Limit sleeve 609 limits the movement of telescopic device along the direction perpendicular to telescopic direction, can reduce the bending deformation of first shaft section 605.

[0037] The utility model discloses, the center line of second limit groove 602 and the telescopic direction of telescopic device are perpendicular to each other, and telescopic device is arranged on one vertical side wall of hanging body 601. The vertical side wall is described with the working state shown in the figure, and the vertical side wall and the shaft line of wellbore are parallel to each other. Figure 1

[0038] The utility model discloses, still include lifting hook 610, and the both ends of lifting hook 610 are all fixedly connected with hanging body 601, and through lifting hook 610 can make hanging device 6 with hoisting equipment connection, conveniently lift hanging device 6 to first heat preservation connecting pipe 4 top, and clamping device 2 and fastening device 3 all are spanner, and the spanner handle of clamping device 2 is set up in first limit groove 102, and first limit device 1 is the tray of hollow sucker rod 8, and first limit device 1 is used for fixed on the upper end of hollow sucker rod 8.

[0039] ​The elastic component 604 is a spring, the spring is sleeved to the outside of the second shaft section 606, and the two ends of the spring are respectively in abutment with the end face of the first shaft section 605 close to the second shaft section 606 and the inner bottom wall of the shell 603.

[0040] The utility model discloses still include switch handle 12, switch handle 12 and the fixed connection of second shaft section 606 away from one end of first shaft section 605.

[0041] The utility model discloses a shell 603 includes a shell and baffle 611, and baffle 611 fixed connection is in the shell away from the shell opening one end, and the end face of baffle 611 close to first shaft section 605 is the inner bottom wall of shell 603.

[0042] The utility model discloses a first flat square 9 is arranged at the joint of the first heat preservation connecting pipe 4 and the second heat preservation connecting pipe 5, and two opposite recesses 7 are formed at the first flat square 9.

[0043] The use method of the heat preservation connecting pipe lifting and lowering device 100 is as follows:

[0044] Lowering operation: the lifting hook 610 is connected to the hooking device capable of rotating, the second limiting groove 602 of the hanging body 601 is clamped in the first flat square 9 on the male joint of the heat preservation connecting pipe, the inner top wall of the two recesses 7 formed by the flat square section is in contact with the upper surface of the hanging body 601, so that the heat preservation connecting pipe is overlapped on the hanging body 601, the female joint of the heat preservation connecting pipe is inserted into the tray screwed on the male joint of the hollow sucker rod 8, and the heat preservation connecting pipe is lowered into the hollow sucker rod 8; the first flat square 9 below the male joint of the heat preservation connecting pipe is provided with the second flat square 10, when the male joint of the heat preservation connecting pipe reaches the vicinity of the tray, the clamping device 2 is clamped in the second flat square 10, and is slowly lowered, when the wrench head of the clamping device 2 is in the tray and the wrench handle of the clamping device 2 is in the first limiting groove 102 (as shown in the figure), the switch handle 12 is pulled, the heat preservation connecting pipe (which is the first heat preservation connecting pipe 4) is released from the limiting, and the hanging device 6 is removed. Figure 1

[0045] ​The second heat preservation connecting pipe 5 is hoisted by the same procedure, when the female joint of the second heat preservation connecting pipe 5 reaches the vicinity of the male joint of the first heat preservation connecting pipe 4, the fastening device 3 is clamped in the third flat square 11 of the female joint of the second heat preservation connecting pipe 5, the fastening device 3 is rotated to tighten the second heat preservation connecting pipe 5 in the male joint of the first heat preservation connecting pipe 4, and the clamping device 2 can not be manually operated during the tightening process because the first limiting groove 102 can limit the clamping device 2 in the circumferential direction. When the two heat preservation connecting pipes are tightened, the two heat preservation connecting pipes are hoisted by the well drilling machine, the clamping device 2 is taken out, and the two heat preservation connecting pipes are lowered into the hollow sucker rod 8. Then, the lowering step is repeated for repeated operation until the depth requirement is reached.

[0046] The lifting operation is as follows: the hook 610 is connected to the hooking device capable of rotating, the second limiting groove 602 of the hooking body 601 is clamped in the first flat square 9 on the male joint of the heat preservation connecting pipe in the wellbore, the heat preservation connecting pipe is lifted to the outside of the wellbore by the hoisting equipment, at this time, the heat preservation connecting pipe is the second heat preservation connecting pipe 5, and the heat preservation connecting pipe connected to the lower end of the second heat preservation connecting pipe 5 is the first heat preservation connecting pipe 4, when the male joint of the first heat preservation connecting pipe 4 reaches the vicinity of the tray, the clamping device 2 is clamped in the second flat square 10, and is slowly lowered, when the wrench head of the clamping device 2 is in the tray and the wrench handle of the clamping device 2 is in the first limiting groove 102, the fastening device 3 is clamped in the third flat square 11 of the female joint of the second heat preservation connecting pipe 5, and the fastening device 3 is reversely rotated to loosen the second heat preservation connecting pipe 5, so that the second heat preservation connecting pipe 5 is disassembled; the second limiting groove 602 of the hooking body 601 is clamped in the first flat square 9 of the first heat preservation connecting pipe 4, and is lifted by a distance, the clamping device 2 is taken out, and the first heat preservation connecting pipe 4 is lifted to the outside of the wellbore by the hoisting equipment, at this time, the first heat preservation connecting pipe 4 is converted into the second heat preservation connecting pipe 5, and the lifting step is repeated for repeated operation.

[0047] The principle and implementation mode of the specific examples are described in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, according to the idea of the utility model, the specific implementation mode and application range can be changed by the general technical personnel in the field. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An insulated pipe running-in and pulling-out device, characterized in that: The device comprises a first limiting device, a clamping device and a fastening device, wherein: The upper surface of the first limiting device is provided with a first through hole and a first limiting groove, the first limiting device is used to be fixed above the wellhead, the first through hole is used for the first heat preservation connecting pipe to pass through, the lower end of the first heat preservation connecting pipe can pass through the first through hole and be lowered into the wellbore; The clamping device is arranged on the side of the first limiting device away from the wellhead, the clamping device is used to clamp the upper end of the first heat preservation connecting pipe, at least part of the clamping device can be arranged in the first limiting groove, the inner bottom wall of the first limiting groove can limit the downward movement of the clamping device by contacting the outer wall of the clamping device, and the inner side wall of the first limiting groove can limit the rotation of the clamping device around the axis of the first heat preservation connecting pipe by contacting the outer wall of the clamping device; The fastening device is used to rotate the second heat preservation connecting pipe above the first heat preservation connecting pipe around the axis of the second heat preservation connecting pipe, so as to realize the threaded connection or threaded disconnection between the lower end of the second heat preservation connecting pipe and the upper end of the first heat preservation connecting pipe.

2. The insulated pipe connection running device according to claim 1, characterized in that: It also comprises a hanging device, which is used to be detachably fixedly connected with the second heat preservation connecting pipe, and the hanging device is used to be connected with hoisting equipment.

3. The insulated pipe connection running tool of claim 2, wherein: The hanging device comprises a hanging body and a slot opening switch, one side of the hanging body is provided with a second limiting groove, the slot opening switch is arranged at the slot of the second limiting groove, and the slot opening switch can open or close the slot of the second limiting groove; recesses are arranged on the outer side walls of the first heat preservation connecting pipe and the second heat preservation connecting pipe; the pipe section where the recess of the second heat preservation connecting pipe is located can enter the second limiting groove through the slot, the upper end of the hanging body can contact the inner top wall of the recess to limit the downward movement of the second heat preservation connecting pipe, and the slot opening switch can limit the movement of the second heat preservation connecting pipe away from the groove bottom wall of the second limiting groove.

4. The insulated pipe connection running tool of claim 3, wherein: The slot opening switch comprises a telescopic device, the telescopic device is fixedly connected with the hanging body at the slot, the output end of the telescopic device can be telescoped between a first position and a second position, the output end of the telescopic device can close the slot when the output end of the telescopic device is located at the first position, and the output end of the telescopic device can open the slot when the output end of the telescopic device is located at the second position.

5. The insulated pipe connection running tool of claim 4, wherein: The telescopic device comprises a shell, an elastic component and a telescopic shaft, the shell is a cylindrical with an opening at one end; the telescopic shaft comprises a first shaft section and a second shaft section connected with each other, the diameter of the first shaft section is greater than that of the second shaft section; the shell is sleeved outside the second shaft section, the elastic component is arranged between the end face of the first shaft section close to the second shaft section and the inner bottom wall of the shell; the first shaft section can be moved to the second position under the action of external force and make the elastic component compressed, and the first shaft section can be moved to the first position under the action of the restoring force of the elastic component.

6. The insulated pipe connection running device according to claim 5, characterized in that: The slot switch further comprises a limiting sheet fixedly connected to one end of the shell away from the opening of the shell, second through holes are arranged on the bottom wall of the shell and the limiting sheet, and an outer side wall of the second shaft segment away from the first shaft segment can pass through the second through holes of the shell and the limiting sheet and extend to outside of the shell, and the outer side wall of the second shaft segment is in sliding connection with an inner side wall of the limiting sheet.

7. The insulated pipe connection running tool of claim 5, wherein: An outer side wall of the first shaft segment is in sliding connection with an inner side wall of the shell.

8. The insulated pipe connection running tool of claim 4, wherein: The slot switch further comprises a limiting sleeve fixedly connected with the hanging body, and the limiting sleeve is arranged opposite to the output end of the telescopic device; when the output end of the telescopic device is located at the first position, the output end of the telescopic device is inserted into an inner cavity of the limiting sleeve, and an inner side wall of the limiting sleeve can limit movement of the telescopic device in a direction perpendicular to the telescopic direction.

9. The insulated pipe connection running tool of claim 4, wherein: A center line of the second limiting groove is perpendicular to the telescopic direction of the telescopic device.

10. The insulated pipe connection running tool of claim 3, wherein: The hanging device further comprises a hook, both free ends of the hook are fixedly connected with the hanging body, the clamping device and the fastening device are both spanners, and the first limiting device is a hollow sucker rod tray.

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