CN212272046U

CN212272046U - Telescopic pipe capable of transmitting torque

Info

Publication number: CN212272046U
Application number: CN202020224464.1U
Authority: CN
Inventors: 王书慧; 熊伟; 付闯; 刘鑫; 麻鹏宇; 付虹杰; 殷伟; 杨鹏; 于静
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2021-01-01
Anticipated expiration: 2030-02-28

Abstract

The utility model provides a flexible pipe of transferable moment of torsion formula, it includes urceolus and inner tube, the inner tube stretches into in the urceolus and can connect with the urceolus separately, is fixed with at least one slider on the outer wall of inner tube, is equipped with ring channel and at least one rectangular shape track groove on the inner wall of urceolus, ring channel and track groove all extend and communicate along the axial of urceolus, the slider is located ring channel or track inslot; when the sliding block is positioned in the track groove, the torque can be transmitted between the inner cylinder and the outer cylinder through the sliding block. The utility model discloses a flexible pipe can compensate the influence that the tubular column in the pit is influenced by pressure or temperature and is extended or shorten, can release simultaneously because the rotatory moment of torsion that brings of tubular column influences to can transmit the moment of torsion when needs transmission moment of torsion.

Description

Telescopic pipe capable of transmitting torque

Technical Field

The utility model belongs to the technical field of the oil recovery technique and specifically relates to a flexible pipe of transferable moment of torsion formula.

Background

At present, in the middle and later stages of development of an oil field, various downhole tools are inevitably required to be put into an oil well to realize reasonable application of the productivity of the oil well, and the downhole tools are influenced by various factors and inevitably extend or shorten, so that the using effect of the downhole tools is influenced, re-operation can be seriously caused, the productivity of the oil well is further influenced, and the operating cost of the oil well is increased.

The telescopic pipe type releasing working mode adopted at present is single, the telescopic pipe can only be stretched and cannot transmit torque, and the torque cannot be released, so that adverse effects are brought to practical application.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can transmit flexible pipe of moment of torsion formula to solve the problem that can not transmit the moment of torsion, can not release the moment of torsion that current flexible pipe exists.

In order to achieve the above object, the present invention provides a telescopic tube capable of transmitting torque, which comprises an outer tube and an inner tube, wherein the inner tube extends into the outer tube and is detachably connected with the outer tube, at least one slider is fixed on the outer wall of the inner tube, an annular groove and at least one elongated track groove are arranged on the inner wall of the outer tube, the annular groove and the track groove both extend and communicate along the axial direction of the outer tube, and the slider is located in the annular groove or the track groove; under the state that the inner tube with the urceolus is separated, when the slider is located when the ring channel, the slider can be followed the axial and the circumferencial direction of ring channel slide, flexible pipe can stretch out and draw back just the inner tube with the urceolus can rotate relatively, works as the slider is located when the track inslot, the inner tube with can pass through between the urceolus the slider transmission moment of torsion.

The telescopic tube capable of transmitting torque as described above, wherein the number of the slide blocks is equal to the number of the track grooves, the number of the slide blocks is plural, the plural slide blocks are arranged at equal intervals in the circumferential direction of the inner tube, the number of the track grooves is plural, and the plural track grooves are arranged at equal intervals in the circumferential direction of the outer tube.

The telescopic tube capable of transmitting torque as described above, wherein a guide groove for guiding the sliding block in the annular groove into the track groove is provided between the plurality of track grooves and the annular groove, a first end of the guide groove is connected to the annular groove, and a second end of the guide groove is connected to the track groove.

The telescopic pipe capable of transmitting torque comprises an inner pipe and a lower central pipe, wherein the lower central pipe is arranged in the outer pipe in a penetrating mode, the sliding block is fixed on the outer wall of the lower central pipe, the upper end of the upper central pipe is located outside the outer pipe, and the lower end of the upper central pipe is connected with the lower central pipe.

The telescopic pipe capable of transmitting torque as described above, wherein the lower end of the upper central pipe extends into the lower central pipe, and the lower end of the upper central pipe is connected with the upper end of the lower central pipe by a screw thread and fixed by a set screw.

The telescopic pipe capable of transmitting torque comprises an upper barrel body and a lower barrel body, wherein the lower end of the upper barrel body is connected with the upper end of the lower barrel body, the annular groove is formed by butt joint of a first section of groove and a second section of groove, the first section of groove is formed in the inner wall of the upper barrel body, and the second section of groove is formed in the inner wall of the lower barrel body.

The telescopic pipe capable of transmitting torque as described above, wherein the track groove is disposed on the inner wall of the lower cylinder, and the track groove is located below the second section groove and is communicated with the second section groove.

The telescopic pipe capable of transmitting torque as described above, wherein a guide groove for guiding the slider in the annular groove into the track groove is provided between the second section groove and the track groove, the guide groove is provided on the inner wall of the lower cylinder, a first end of the guide groove is connected to the second section groove, and a second end of the guide groove is connected to the track groove.

The telescopic tube capable of transmitting torque as described above, wherein the inner tube and the outer tube are detachably connected by a shear pin.

The telescopic tube capable of transmitting torque as described above, wherein the slider is located in the annular groove in a state where the inner tube and the outer tube are connected.

The utility model discloses a flexible pipe of transferable moment of torsion formula's characteristics and advantage are:

1. the utility model discloses a flexible pipe of transferable moment of torsion formula is equipped with annular ring channel and rectangular shape track groove and supplies the slider to slide, and when the slider was located the ring channel and the slider slided along the axial of ring channel, flexible pipe extension or shorten, flexible pipe realization flexible function; when the sliding block is positioned in the annular groove and slides along the circumferential direction of the annular groove, the inner cylinder and the outer cylinder rotate relatively, and the telescopic pipe realizes the function of releasing torque but not transmitting torque; when the slide block is positioned in the track groove, the torque can be transmitted between the inner cylinder and the outer cylinder through the slide block, and the telescopic pipe realizes the function of transmitting the torque, so the telescopic pipe can compensate the influence of the extension or the shortening of the underground pipe column under the influence of pressure or temperature, can release the influence of the torque caused by the rotation of the pipe column, and can transmit the torque when the torque is required to be transmitted, thereby the underground tool is in a more ideal working state, can be treated when an accident occurs, normally exerts the efficiency of the underground tool, and improves the productivity of an oil well;

2. the utility model discloses a but transmission moment of torsion formula telescopic tube simple structure uses convenient operation, the dismouting of being convenient for.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

figure 1 is a cross-sectional view of one embodiment of a torque transferable telescopic tube of the present invention;

fig. 2 is a sectional view taken along line a-a of fig. 1.

Main element number description:

1. an outer cylinder; 11. an annular groove; 12. a track groove; 13. an upper cylinder body; 14. a lower cylinder body; 15. a guide groove;

2. an inner barrel; 21. an upper center tube; 22. a lower center tube;

3. a slider; 4. shearing off the pin; 5. a first set screw; 6. an upper joint;

7. a second set screw; 8. and (5) plugging with a thread.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Where adjective or adverbial modifiers "upper" and "lower", "top" and "bottom", "inner" and "outer" are used merely to facilitate relative reference between groups of terms, and do not describe any particular directional limitation on the modified terms. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1, the utility model provides a flexible pipe of transferable moment of torsion formula, it includes urceolus 1 and inner tube 2, inner tube 2 stretches into in the urceolus 1, and inner tube 2 and urceolus 1 can be connected separately, be fixed with at least one slider 3 on the outer wall of inner tube 2, be equipped with annular ring channel 11 and at least one rectangular shape track groove 12 on the inner wall of urceolus 1, ring channel 11 and track groove 12 all extend along the axial of urceolus 1, and ring channel 11 and track groove 12 communicate, slider 3 is located ring channel 11 or track groove 12; when the inner cylinder 2 is separated from the outer cylinder 1, and the slide block 3 is positioned in the annular groove 11, the slide block 3 can slide along the axial direction and the circumferential direction of the annular groove 11, the telescopic pipe can stretch and contract, and the inner cylinder 2 and the outer cylinder 1 can relatively rotate (namely, torque is not transmitted between the inner cylinder 2 and the outer cylinder 1); when the sliding block 3 is positioned in the track groove 12, torque can be transmitted between the inner cylinder 2 and the outer cylinder 1 through the sliding block 3.

When the telescopic pipe is used, the telescopic pipe is lowered to a designed position in a shaft along with a pipe column, the inner cylinder 2 is separated from the outer cylinder 1, after the inner cylinder 2 is separated from the outer cylinder 1, when the slide block 3 is positioned in the annular groove 11 and the slide block 3 slides along the axial direction of the annular groove 11, the telescopic pipe is extended or shortened, and the telescopic function of the telescopic pipe is realized; when the slide block 3 is positioned in the annular groove 11 and the slide block 3 slides along the circumferential direction of the annular groove 11, the inner cylinder 2 and the outer cylinder 1 rotate relatively, and the telescopic pipe realizes the function of releasing torque without transmitting torque; when the sliding block 3 is positioned in the track groove 12, the torque can be transmitted between the inner cylinder 2 and the outer cylinder 1 through the sliding block 3, and the telescopic pipe realizes the function of transmitting the torque.

Further, the cross-sectional shape of the track groove 12 matches the shape of the slider 3, e.g. the slider 3 is clearance fitted with the track groove 12. For example, the sliding block 3 is block-shaped, and preferably, the outer side surface of the sliding block 3 is arc-shaped to match with the arc-shaped groove bottom of the annular groove 11; the cross-sectional shape of the track groove 12 is rectangular.

As shown in fig. 1, in one embodiment, the number of the sliders 3 is equal to the number of the track grooves 12, the number of the sliders 3 is plural, the plurality of sliders 3 are arranged at equal intervals in the circumferential direction of the inner cylinder 2, the number of the track grooves 12 is plural, the plurality of track grooves 12 are arranged at equal intervals in the circumferential direction of the outer cylinder 1, for example, the number of the sliders 3 is four, and the number of the track grooves 12 is four. When the torque needs to be transmitted, the sliding blocks 3 are respectively positioned in the track grooves 12, and the torque can be transmitted more uniformly and stably by arranging the sliding blocks 3 and the track grooves 12.

As shown in fig. 1 and 2, in one embodiment, a guide groove 15 for guiding the slider 3 in the annular groove 11 into the rail groove 12 is provided between the rail groove 12 and the annular groove 11, a first end of the guide groove 15 is connected to the annular groove 11, and a second end of the guide groove 15 is connected to the rail groove 12.

As shown in fig. 1, when there are a plurality of rail grooves 12, one guide groove 15 is disposed between each of the rail grooves 12 and the annular groove 11, a first end of each guide groove 15 is connected to the annular groove 11, and a second end of each guide groove 15 is connected to the corresponding rail groove 12.

As shown in fig. 1, further, the first ends of the plurality of guide grooves 15 are sequentially connected in the circumferential direction of the annular groove 11, that is, the first ends of the plurality of guide grooves 15 surround an annular introduction port to introduce the plurality of sliders 3 into the corresponding track grooves 12, respectively.

Further, both side walls of the guide groove 15 are inclined surfaces to introduce the slider 3 into the track groove 12.

In one embodiment, as shown in figure 1, the inner barrel 2 and the outer barrel 1 are separably connected by shear pins 4.

As shown in fig. 1, specifically, the sidewall of the outer cylinder 1 is provided with an insertion hole for inserting the shear pin 4, the insertion hole penetrates through the sidewall of the outer cylinder 1 in the radial direction of the outer cylinder 1, and the shear pin 4 is inserted into the insertion hole and extends into the sidewall of the inner cylinder 2. Preferably, a plug 8 is further arranged in the insertion hole, and in the radial direction of the outer cylinder 1, the plug 8 is located outside the shear pin 4 to avoid adverse effects on the shear pin 4 from the outside.

As shown in fig. 1, in one embodiment, in a state where the inner tube 2 is coupled with the outer tube 1, the slider 3 is located in the annular groove 11; in a state where the inner cylinder 2 is separated from (i.e., disconnected from) the outer cylinder 1, the inner cylinder 2 can slide axially relative to the outer cylinder 1.

When the telescopic pipe is put into a shaft along with a pipe column during use, the inner barrel 2 and the outer barrel 1 are in a connection state, the sliding block 3 is located in the annular groove 11, when the telescopic pipe is put into a designed position in the shaft along with the pipe column, the pipe column is lifted up firstly, then the pipe column is put down at an accelerated speed, the shearing pin 4 is sheared by means of inertia effect, the sliding block 3 can freely slide and rotate up and down in the annular groove 11 at the moment, when torque is required to be transmitted, the pipe column is put down, after the sliding block 3 is in contact with the guide groove 15, the sliding block 3 enters the track groove 12 through the guide groove 15 under the action of gravity, and at the moment, the pipe column can.

As shown in fig. 1, in one embodiment, the inner cylinder 2 includes an upper central tube 21 and a lower central tube 22, the lower central tube 22 is inserted into the outer cylinder 1, the sliding block 3 is fixed on the outer wall of the lower central tube 22, the upper end of the upper central tube 21 is located outside the outer cylinder 1, and the lower end of the upper central tube 21 is connected to the lower central tube 22.

Further, the lower end of the upper central tube 21 extends into the lower central tube 22, and the lower end of the upper central tube 21 is connected with the upper end of the lower central tube 22 through threads and fixed through the first set screw 5, so as to prevent the upper central tube 21 and the lower central tube 22 from rotating relatively.

Further, the length of the lower center tube 22 is greater than the axial length of the annular groove 11 to ensure the smoothness of the lower center tube 22 when sliding inside the annular groove 11.

Further, the sliding block 3 is welded and fixed with the lower central tube 22; or a groove is arranged on the outer wall of the lower central tube 22, and the inner side of the sliding block 3 is embedded into the groove and is in interference fit with the groove.

Further, the upper end of the upper center pipe 21 is connected to an upper joint 6 to connect other pipe strings through the upper joint 6. Specifically, the upper central tube 21 is connected with the upper joint 6 through threads, so that the assembly and disassembly are convenient.

As shown in fig. 1, in one embodiment, the outer cylinder 1 includes an upper cylinder 13 and a lower cylinder 14, a lower end of the upper cylinder 13 is connected to an upper end of the lower cylinder 14, and the annular groove 11 is formed by abutting a first groove and a second groove, the first groove is disposed on an inner wall of the upper cylinder 13, and the second groove is disposed on an inner wall of the lower cylinder 14. Through setting up urceolus 1 to split type structure to set up annular groove 11 to two segmentation structures, not only be convenient for process annular groove 11, still be convenient for install slider 3 in annular groove 11.

Specifically, the lower end of the first section of groove penetrates through the bottom end face of the upper cylinder 13, and the upper end of the second section of groove penetrates through the top end face of the lower cylinder 14, so that after the lower end of the upper cylinder 13 is connected with the upper end of the lower cylinder 14, the first section of groove and the second section of groove form an annular groove 11.

As shown in fig. 1, further, the upper cylinder 13 and the lower cylinder 14 are screwed and fixed by the second set screw 7 to prevent the relative rotation of the upper cylinder 13 and the lower cylinder 14.

Further, the track groove 12 is provided on the inner wall of the lower cylinder 14, and the track groove 12 is located below the second section groove and is communicated with the second section groove.

As shown in fig. 1, a guide groove 15 for guiding the slider 3 in the annular groove 11 into the track groove 12 is further provided between the second groove and the track groove 12, the guide groove 15 is provided on the inner wall of the lower cylinder 14, a first end of the guide groove 15 is connected to the second groove, and a second end of the guide groove 15 is connected to the track groove 12.

As shown in fig. 1, further, the lower end of the lower cylinder 14 is provided with an external thread, and the lower end of the lower cylinder 14 functions as a lower joint for connecting other pipe strings.

The utility model discloses a flexible pipe of transferable moment of torsion formula can compensate the influence that tubular column in the pit was extended or shortened by pressure or temperature influence, can release simultaneously because the rotatory moment of torsion that comes of tubular column influences, and can transmit the moment of torsion when needs transmission moment of torsion, thereby make downhole tool be in more ideal operating condition, can realize when the accident breaks down that the transmission moment of torsion is thrown off in order to realize the tubular column, be favorable to the incident processing to be solved, make downhole tool's efficiency ability normal performance, improve the oil well productivity.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.

Claims

1. The telescopic pipe capable of transmitting the torque is characterized by comprising an outer barrel and an inner barrel, wherein the inner barrel extends into the outer barrel and is detachably connected with the outer barrel, at least one sliding block is fixed on the outer wall of the inner barrel, an annular groove and at least one elongated track groove are formed in the inner wall of the outer barrel, the annular groove and the track groove extend and are communicated along the axial direction of the outer barrel, and the sliding block is positioned in the annular groove or the track groove; under the state that the inner tube with the urceolus is separated, when the slider is located when the ring channel, the slider can be followed the axial and the circumferencial direction of ring channel slide, flexible pipe can stretch out and draw back just the inner tube with the urceolus can rotate relatively, works as the slider is located when the track inslot, the inner tube with can pass through between the urceolus the slider transmission moment of torsion.

2. The telescopic tube capable of transmitting torque according to claim 1, wherein the number of the slide blocks is equal to the number of the track grooves, the number of the slide blocks is plural, the plural slide blocks are arranged at equal intervals in a circumferential direction of the inner tube, the number of the track grooves is plural, and the plural track grooves are arranged at equal intervals in a circumferential direction of the outer tube.

3. The torque transmittable telescopic tube according to claim 2, wherein a plurality of guide grooves for guiding the slider in the annular groove into the guide grooves are provided between the track grooves and the annular groove, respectively, a first end of the guide groove is connected to the annular groove, and a second end of the guide groove is connected to the track groove.

4. The telescopic tube capable of transmitting torque according to claim 1, wherein the inner tube comprises an upper central tube and a lower central tube, the lower central tube is arranged in the outer tube in a penetrating manner, the sliding block is fixed on the outer wall of the lower central tube, the upper end of the upper central tube is positioned outside the outer tube, and the lower end of the upper central tube is connected with the lower central tube.

5. The torque transmittable telescopic tube according to claim 4, wherein the lower end of said upper central tube is inserted into said lower central tube, and the lower end of said upper central tube is screwed to the upper end of said lower central tube and fixed thereto by a set screw.

6. The telescopic tube capable of transmitting torque according to claim 1, wherein the outer tube comprises an upper tube body and a lower tube body, the lower end of the upper tube body is connected with the upper end of the lower tube body, the annular groove is formed by butting a first section of groove and a second section of groove, the first section of groove is arranged on the inner wall of the upper tube body, and the second section of groove is arranged on the inner wall of the lower tube body.

7. The torque transferable telescopic tube of claim 6, wherein the track groove is disposed on an inner wall of the lower cylinder, the track groove being located below and in communication with the second segment groove.

8. The telescopic tube capable of transmitting torque according to claim 7, wherein a guide groove for guiding the slider in the annular groove into the rail groove is provided between the second-stage groove and the rail groove, the guide groove is provided on the inner wall of the lower cylinder, a first end of the guide groove is connected to the second-stage groove, and a second end of the guide groove is connected to the rail groove.

9. The torque transferable telescopic tube of any one of claims 1 to 8, wherein the inner and outer cylinders are separably connected by shear pins.

10. The torque transmittable telescopic tube according to any one of claims 1 to 8, wherein said slider is located in said annular groove in a state where said inner tube is connected to said outer tube.