WO2021012289A1

WO2021012289A1 - Liner composite device for pipeline

Info

Publication number: WO2021012289A1
Application number: PCT/CN2019/097872
Authority: WO
Inventors: 屈波
Original assignee: 屈波
Priority date: 2019-07-24
Filing date: 2019-07-26
Publication date: 2021-01-28
Also published as: CN110242238A

Abstract

A liner composite device for a pipeline, comprising a cylinder body (2), a steering head (3), a pressure control connector (4), an annular sealing assembly (5), and a metal liner pipe (6). One end of the cylinder body (2) is used for injecting a pressure fluid, and a plurality of pressure fluid injection channels (412, 23, 24) are formed in a radial direction; the other end is connected to the steering head (3); the pressure control connector (4) is provided in a central channel of the cylinder body (2) and configured to divide the central channel into a first pressure fluid chamber (21) and a second pressure fluid chamber (22) which are communicated with each other by means of the channel; the pressure control connector is further configured to inject the pressure fluid in the first pressure fluid chamber (21) to the outside of the cylinder body (2) by means of the pressure fluid injection channels (412, 23, 24) matched with the cylinder body (2); the annular sealing assembly (5) is sleeved on both sides of the cylinder body (2); the metal liner pipe (6) is sleeved outside the annular sealing assembly (5) and the cylinder body (2). The device has the advantages of simple structure, reliability, convenient construction, low operation costs, and no need for initiating explosive devices, expensive parts and auxiliary facilities, and large hydraulic fracturing vehicles.

Description

Inner lining compound device for pipeline

Technical field

The invention belongs to the technical field of oil and gas extraction in oil fields, and in particular relates to an lining composite device for pipelines.

Background technique

In the process of oil and gas field development and production, as the production time increases, various geological factors and artificial measures will have varying degrees of impact on the wellbore casing, causing the casing to leak, corrode and perforate, or due to mining reasons, it is necessary to plug a certain When perforating the wellbore casing corresponding to an oil and gas reservoir, it is necessary to plug and repair the local area of the wellbore casing.

Summary of the invention

In view of this, the main purpose of the present invention is to provide a lining composite device for pipelines.

In order to achieve the above objective, the technical solution of the present invention is achieved as follows:

The embodiment of the present invention provides a lining composite device for pipelines. The lining composite device is used in a pipeline and includes a cylindrical cylinder, a steering head, a pressure control connector, an annular sealing component, and a metal lining pipe;

One end of the cylindrical barrel is used for injecting pressure fluid, and a plurality of pressure fluid injection holes are arranged in the radial direction of the cylindrical barrel; the other end of the cylindrical barrel is connected with a guide head;

The pressure control connector is arranged in the central pore of the cylindrical cylinder, and is used to divide the central pore into a first pressure fluid container and a second pressure fluid container, and is communicated through the pore on the pressure control connector; The pressure fluid injection port provided in cooperation with the cylindrical barrel injects the pressure fluid in the first pressure fluid chamber to the outside of the cylindrical barrel;

The annular sealing assembly is sleeved on both sides of the cylindrical cylinder, and is used to seal the two ends of the metal liner after being driven by the pressure fluid from the first pressure fluid tank and the second pressure fluid tank;

The metal lining tube is sleeved outside the annular sealing assembly and the cylindrical body, and forms a cavity containing pressure fluid between the outer wall of the cylindrical body and the annular sealing assembly.

In the above solution, the pressure control connector includes a cylindrical connecting cylinder, a guide steel column, and a shear pin. The guide steel column is fixed on the cylindrical connecting cylinder by the shear pin and faces the cylindrical cylinder for injection of pressure fluid. One side.

In the above solution, the cylindrical connecting cylinder is provided with a first pressure fluid injection port communicating with the first pressure fluid tank and the second pressure fluid tank in the axial direction, and the cylindrical connecting cylinder is radially connected to the cylindrical cylinder. The corresponding position in the radial direction is provided with a connected second pressure fluid injection port; the guide steel column is provided with a third pressure fluid injection port that can be matched with the second pressure fluid injection port.

In the above solution, the annular sealing assembly includes a first annular piston, a first elastic sealing ring, a second annular piston, and a second elastic sealing ring. A first elastic sealing ring is provided in the displacement direction of the first annular piston, so A second elastic sealing ring is arranged in the displacement direction of the second annular piston.

In the above solution, a first pressure ring and a second pressure ring are further included. The first pressure ring, the first elastic sealing ring, and the first annular piston are sequentially sleeved on one side of the cylindrical body; the second annular piston , The second elastic sealing ring and the second pressure ring are sequentially sleeved on the other side of the cylindrical body.

In the above solution, a fourth pressure fluid injection channel is provided radially on one side of the cylindrical body, and the fourth pressure fluid injection channel is in communication with the first pressure fluid tank; the radial direction on the other side of the cylindrical body A fifth pressure fluid injection channel is provided, and the fifth pressure fluid injection channel is in communication with the second pressure fluid tank.

In the above solution, the first annular piston liquid injection cavity is formed between the distal end surface of the end surface of the first annular piston abutting the first elastic sealing ring and the cylindrical body, and the first annular piston liquid injection cavity is connected to the fourth The pressure fluid injection channel is in communication; the second annular piston abuts against the second elastic seal ring and the cylindrical barrel forms a second annular piston injection cavity between the distal end of the end surface, the second annular piston injection cavity and The fifth pressure fluid injection channel is connected.

In the above solution, the cylindrical body abuts against the end surface of the first pressure ring; and the guide head abuts against the end surface of the second pressure ring.

In the above solution, the first elastic sealing ring and the second elastic sealing ring respectively abut against both ends of the inner wall of the metal lining pipe.

In the above solution, the end surfaces of both ends of the metal lining pipe abut against the end surfaces of the first pressure ring and the second pressure ring, respectively.

Compared with the prior art, the present invention is simple in structure, reliable, convenient in construction, low in operating cost, does not require the aid of pyrotechnic devices, does not require expensive parts and auxiliary facilities, and does not require a large hydraulic fracturing vehicle.

Description of the drawings

FIG. 1 is a schematic structural diagram of a lining composite device for pipelines according to an embodiment of the present invention;

2 is a schematic structural diagram of an lining composite device for pipelines in application according to an embodiment of the present invention;

3 is a schematic structural diagram of a metal lining pipe after sealing both ends of a metal lining pipe provided by an lining composite device for a pipeline according to an embodiment of the invention;

FIG. 4 is a schematic structural diagram of the entire metal lining pipe after being sealed by an lining composite device for a pipeline according to an embodiment of the present invention.

Among them, 1-pipe, 2-cylindrical cylinder, 3-direction head, 4-pressure control connector, 5-ring seal assembly, 6-metal lining pipe, 21-first pressure fluid tank, 22-second Pressure fluid tank, 23-fourth pressure fluid injection port, 24-fifth pressure fluid injection port, 25-upper joint, 26-first hollow steel column, 27-first intermediate joint, 28-second hollow steel column, 29-second intermediate joint, 30-third hollow steel column, 61-cavity, 41-cylindrical connecting cylinder, 42-guide steel column, 43-shear pin, 411-first pressure fluid injection channel, 412 -The second pressure fluid injection port, 421-The third pressure fluid injection port, 51 the first annular piston, 52- the first elastic sealing ring, 53- the second annular piston, 54- the second elastic sealing ring, 55- the first Pressure ring, 56-second pressure ring, 511-first annular piston injection chamber, 531-second annular piston injection chamber.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

The embodiment of the present invention provides a lining composite device for pipelines. The lining composite device is applied in the pipeline 1. As shown in FIG. 1, the lining composite device is applied in the pipeline 1, and includes a cylindrical cylinder 2. Leading head 3, pressure control connector 4, ring seal assembly 5, metal lining pipe 6;

One end of the cylindrical barrel 2 is used for injecting pressure fluid, and a plurality of pressure fluid injection holes are arranged in the radial direction of the cylindrical barrel 2; the other end of the cylindrical barrel 2 is connected with the guide head 3;

The pressure control connector 4 is arranged in the central hole of the cylindrical body 2 for dividing the central hole into a first pressure fluid tank 21 and a second pressure fluid tank 22, and is connected through the holes on the pressure control connector 4 ; It is also used to inject the pressure liquid in the first pressure liquid chamber 21 into the outside of the cylindrical body 2 through the pressure liquid injection port provided in cooperation with the cylindrical body 2;

The annular seal assembly 5 is sleeved on both sides of the cylindrical cylinder 2 for driving both ends of the metal lining tube 6 after being driven by the pressure fluid from the first pressure fluid tank 21 and the second pressure fluid tank 22 seal;

The metal lining tube 6 is sleeved outside the annular sealing assembly 5 and the cylindrical body 2, and forms a cavity 61 containing pressure fluid between the outer wall of the cylindrical body 2 and the annular sealing assembly 5.

In this way, after the pressure fluid is injected through one end of the cylindrical cylinder 2, the pressure fluid located in the first pressure fluid tank 21 and the second pressure fluid tank 22 drives the displacement of the annular seal assembly 5 through the pressure fluid injection port, and realizes the axis of the annular seal assembly 5. To compress and expand in the radial direction, the two ends of the inner wall of the metal lining pipe 6 are squeezed, so that the two ends of the metal lining pipe 6 are plastically deformed and attached to the inner wall of the pipeline 1, thereby realizing the two ends of the metal lining pipe 6. After that, the pressure fluid in the first pressure fluid chamber 21 continues to apply pressure to the pressure control connector 4. After the pressure received by the pressure control connector 4 exceeds the set pressure value, the first pressure The pressure fluid injection channels of the liquid tank 21, the pressure control connector 4 and the cavity 61 are opened, the pressure fluid is injected into the cavity 61, and the pressure fluid in the cavity 61 uniformly applies pressure to the inner wall of the metal lined pipe 6. The metal lining pipe 6 is plastically deformed, and finally the outer wall of the entire metal lining pipe 6 closely adheres to the inner wall of the pipe 1. Then, the injection of the pressure liquid at one end of the cylindrical cylinder 2 is stopped to release the pressure. The annular sealing assembly 5 Reset and withdraw the present invention, while the metal lining pipe 6 still remains in place to achieve plugging subsidy.

The pressure control connector 4 includes a cylindrical connecting cylinder 41, a guide steel column 42, and a shear pin 43. The guide steel column 42 is fixed on the cylindrical connecting cylinder 41 facing the cylindrical cylinder 2 by the shear pin 43. The side where the pressure fluid is injected.

The cylindrical connecting cylinder 41 is provided with a first pressure fluid injection hole 411 in the axial direction that communicates the first pressure fluid tank 21 and the second pressure fluid tank 22, and the cylindrical connecting cylinder 41 is radially aligned with the cylindrical cylinder. The corresponding position in the radial direction of the body 2 is provided with a connected second pressure fluid injection port 412; the guide steel column 42 is provided with a third pressure fluid injection port 421 that can be matched with the second pressure fluid injection port 412.

The first pressure fluid injection channel 411 and the third pressure fluid injection channel 421 are staggered holes, and the first pressure fluid injection channel 411 is always in communication with the first pressure fluid reservoir 21 and the second pressure fluid reservoir 22.

The pressure liquid in the first pressure fluid tank 21 exerts pressure on the guide steel column 42. After the pressure exceeds the set pressure value of the shear pin 43, the shear pin 43 is disconnected. At this time, the guide steel column 43 moves to the right until it cannot move under the limit of the cylindrical connecting cylinder 41, the third pressure fluid injection channel 421 and the second pressure fluid injection channel 412 are opened, and the pressure in the first pressure fluid chamber 21 The liquid is injected into the cavity 61 through the opened pressure liquid injection port.

Only after the axial compression and radial expansion of the annular seal assembly 5 reach the limit, the pressure on the guide steel column 42 may exceed the set pressure value of the shear pin 43, so this ensures that only in the metal lined pipe After the two ends of the inner wall of 6 are sealed, the metal lining pipe 6 will be blocked and subsidized.

The annular seal assembly 5 includes a first annular piston 51, a first elastic sealing ring 52, a second annular piston 53, and a second elastic sealing ring 54. A first elastic sealing ring is provided in the displacement direction of the first annular piston 51 52. A second elastic sealing ring 54 is provided in the displacement direction of the second annular piston 53.

It also includes a first pressure ring 55 and a second pressure ring 56. The first pressure ring 55, the first elastic sealing ring 52, and the first annular piston 51 are sequentially sleeved on one side of the cylindrical body 2; The annular piston 53, the second elastic sealing ring 54, and the second pressure ring 56 are sleeved on the other side of the cylindrical body 2 in sequence.

A fourth pressure fluid injection channel 23 is provided in the radial direction on one side of the cylindrical body 2, and the fourth pressure fluid injection channel 23 is in communication with the first pressure fluid chamber 21; the diameter of the other side of the cylindrical body 2 A fifth pressure fluid injection channel 24 is provided, and the fifth pressure fluid injection channel 24 is in communication with the second pressure fluid tank 22.

A first annular piston liquid injection cavity 511 is formed between the distal end surface of the end surface of the first annular piston 51 abutting the first elastic sealing ring 52 and the cylindrical body 2. The four pressure fluid injection channels 23 are connected; the second annular piston 53 abuts against the distal end of the second elastic sealing ring 54 and the cylindrical cylinder 2 to form a second annular piston injection cavity 531, the second The annular piston liquid injection chamber 531 is in communication with the fifth pressure liquid injection channel 24.

The pressure fluid in the first pressure fluid tank 21 is injected into the first annular piston fluid injection chamber 511 through the fourth pressure fluid injection passage 23, and pushes the first annular piston 51 to move to the left; similarly, the second pressure fluid The pressure liquid in the liquid tank 22 is injected into the second annular piston liquid injection chamber 531 through the fifth pressure liquid injection passage 24, and the second annular piston 53 is pushed to shift to the right.

The first elastic sealing ring 52 and the second elastic sealing ring 54 abut against both ends of the inner wall of the metal lining tube 65 respectively.

The end surfaces of both ends of the metal lining pipe 6 abut against the end surfaces of the first pressure ring 55 and the second pressure ring 56 respectively.

The pressure fluid in the first pressure fluid tank 21 is injected into the first annular piston fluid injection chamber 511 through the fourth pressure fluid injection port 23, and drives the first annular piston 51 to shift to the left, the first annular piston 51 The leftward pressure is transferred to the first elastic sealing ring 52. Similarly, the pressure fluid in the second pressure fluid tank 22 is injected into the second annular piston fluid injection cavity 531 through the fifth pressure fluid injection port 24, and drives The second annular piston 53 is displaced to the right, and the second annular piston 53 transmits rightward pressure to the second elastic sealing ring 54. In this way, the first elastic sealing ring 52 and the second elastic sealing ring 54 are respectively subjected to pressure. Axial compression and radial expansion are generated, and finally, high-pressure-resistant sealing at both ends of the inner wall of the metal lining pipe 6 is realized.

In the application process of the present invention, the cylindrical barrel 2 can be used with sleeves, cylinders, hollow steel columns, central steel columns, etc. conventionally selected by those skilled in the art, and can be composed of one or more .

Take the cylindrical barrel 2 including an upper joint 25, a first hollow steel column 26, a first intermediate joint 27, a second hollow steel column 28, a second intermediate joint 29, and a third hollow steel column 30 as an example.

The embodiment of the present invention provides a lining composite device for pipelines. The lining composite device is applied in the pipeline 1, as shown in FIG. 2, and includes an upper joint 25, a first hollow steel column 26, and a first intermediate joint 27. , The second hollow steel column 28, the second intermediate joint 29, the third hollow steel column 30, the guide head 3, the pressure control connector 4, the ring seal assembly 5, the metal lining pipe 6;

The upper joint 25, the first hollow steel column 26, the second hollow steel column 28, the third hollow steel column 30 and the guide head 3 are connected in sequence;

A pressure control connector 4 is provided between the first hollow steel column 26 and the second hollow steel column 28, and the two are connected by a first intermediate joint 27;

The second hollow steel column 28 and the third hollow steel column 30 are connected by a second intermediate joint 29;

A part of the annular seal assembly 5 is sleeved outside the first hollow steel column 26, and the other part is sleeved outside the second hollow steel column 28;

The metal lining tube 6 is sleeved outside the annular seal assembly 5 and forms a cavity 61 containing pressure fluid between the first intermediate joint 27, the second hollow steel column 28, and the second intermediate joint 29.

A fourth pressure fluid injection channel 23 is provided in the radial direction of the first hollow steel column 26, and the fourth pressure fluid injection channel 23 is in communication with the first pressure fluid tank 21; the third hollow steel column 30 is provided in the radial direction The fifth pressure fluid injection channel 24 is in communication with the second pressure fluid container 22.

The pressure control connector 4 includes a cylindrical connecting cylinder 41, a guide steel column 42, and a shear pin 43. The guide steel column 42 is fixed on the cylindrical connecting cylinder 41 facing the cylindrical cylinder 2 by the shear pin 43. The side where the pressure fluid is injected;

The cylindrical connecting cylinder 41 is provided with a first pressure fluid injection port 411 in the axial direction that communicates the first pressure fluid tank 21 and the second pressure fluid tank 22, and the cylindrical connecting cylinder 41 is radially connected to the first pressure fluid tank. The corresponding position in the radial direction of the intermediate joint 27 is provided with a communicating second pressure fluid injection port 412; the guide steel column 42 is provided with a third pressure fluid injection port 421 that can be matched with the second pressure fluid injection port 412.

The pressure fluid in the first pressure fluid tank 21 applies pressure to the guide steel column 42. After the pressure exceeds the set pressure value of the shear pin 43, the shear pin 43 is disconnected. At this time, the guide steel The column 43 shifts to the right until it cannot move under the limit of the cylindrical connecting cylinder 41, the third pressure fluid injection channel 421 and the second pressure fluid injection channel 412 are opened, and the first pressure fluid chamber 21 The pressure fluid is injected into the cavity 61 through the opened pressure fluid injection channel.

Only after the radial expansion and axial compression of the annular seal assembly 5 reach the limit, the pressure on the guide steel column 42 may exceed the set pressure value of the shear pin 43, so this ensures that only in the metal lined pipe After the two ends of the inner wall of 6 are sealed, the metal lining pipe 6 will be blocked and subsidized.

The pressure fluid in the first pressure fluid tank 21 is injected into the first annular piston fluid injection chamber 511 through the fourth pressure fluid injection port 23, and drives the first annular piston 51 to shift to the left, the first annular piston 51 The leftward pressure is transferred to the first elastic sealing ring 52. Similarly, the pressure fluid in the second pressure fluid tank 22 is injected into the second annular piston fluid injection cavity 531 through the fifth pressure fluid injection port 24, and drives The second annular piston 53 is displaced to the right, and the second annular piston 53 transmits rightward pressure to the second elastic sealing ring 54. In this way, the first elastic sealing ring 52 and the second elastic sealing ring 54 are pressed Axial compression and radial expansion, finally, the two ends of the metal lining pipe 6 are sealed.

The working process of the embodiment of the present invention is as follows:

(1) Generation of driving pressure:

The uphole equipment injects pressure fluid into the first pressure fluid tank 21 through the upper joint 25, and the pressure fluid in the first pressure fluid tank 21 is also injected into the second pressure fluid through the first pressure fluid injection port 411 of the pressure control connector 4 In the chamber 22, under the effect of the continuous injection of pressure fluid into the upper joint 25, the pressure fluid in the first pressure fluid chamber 21 and the second pressure fluid chamber 22 generates a driving pressure F;

The pressure fluid in the first pressure fluid tank 21 is injected into the first annular piston fluid injection chamber 511 through the fourth pressure fluid injection port 23, and the pressure is transmitted to the first annular piston 51, so that the first annular piston 51 is displaced to the left. The pressure fluid in the second pressure fluid chamber 22 is injected into the second annular piston fluid injection chamber 531 through the fifth pressure fluid injection port 24, and the pressure is transmitted to the second annular piston 53 so that the second annular piston 53 is to the right Displacement.

(2) The sealing process of both ends of the metal lining pipe 6:

As shown in Figure 3, after the driving pressure of the present invention is generated, when the third pressure fluid injection channel 421 and the second pressure fluid injection channel 412 are not aligned and not opened, the sealing of the metal liner pipe 6 The annular sealing components 5 at both ends are automatically activated with priority.

With the displacement of the first annular piston 51 to the left, the pressure is transmitted to the first elastic sealing ring 52, and the second annular piston 53 is displaced to the right to transmit the pressure to the second elastic sealing ring 54; at the driving pressure F Under the continuous action of, the axial width of the first elastic sealing ring 52 and the second elastic sealing ring 54 becomes smaller, and the first elastic sealing ring 52 and the second elastic sealing ring 54 expand radially, respectively to the metal The two ends of the inner wall of the inner wall of the lining pipe 6 are squeezed, so that the inner wall of the metal lining pipe 6 is plastically deformed and squeezed to the inner wall of the pipe 1 to realize high-pressure sealing of the inner wall of the inner wall of the metal lining pipe 6.

When the axial compression deformation of the first elastic sealing ring 52 and the second elastic sealing ring 54 reaches the deformation amount required by the design, that is, the seal pressure resistance level required by the design is guaranteed;

(3) The plugging subsidy process of the metal lining pipe 6:

As shown in Fig. 4, after the high-pressure-resistant sealing of the inner walls at both ends of the metal lining pipe 6 is completed, the pressure liquid in the first pressure liquid tank 21 continues to apply pressure to the guide steel column 42, which exceeds the shear pin 43 After the set pressure value of, the shear pin 43 is disconnected. At this time, the guide steel column 43 shifts to the right until it cannot move under the limit of the cylindrical connecting cylinder 41, the third pressure The liquid injection channel 421 is aligned with the second pressure liquid injection channel 412 and is opened, and the pressure liquid in the first pressure liquid tank 21 is injected into the cavity 61 through the opened pressure liquid injection channel.

The pressure liquid in the cavity 61 uniformly applies pressure to the inner wall of the metal lining pipe 6, causing the metal lining pipe 6 to plastically deform. Block subsidies.

At this time, the entire metal lining pipe 6 has undergone plastic deformation and is tightly compounded to the inner wall of the pipeline 1, completing the plugging and subsidy process.

(4) The withdrawal process of the present invention:

After the metal liner 6 completes the plugging subsidy, the uphole equipment stops injecting pressure fluid into the first pressure fluid tank 21 through the upper joint 25 to release the pressure, and the present invention is in a pressure relief state;

The first annular piston 51 and the second annular piston 52 retreat to the initial position. After the first elastic sealing ring 52 and the second elastic sealing ring 54 lose the pressure of the first annular piston 51 and the second annular piston 52, Reset gradually. In this way, after the first elastic sealing ring 52 and the second elastic sealing ring 54 are separated from the two ends of the metal liner tube 6, the present invention is in a restored state. At this time, the present invention can be withdrawn.

During the entire withdrawal process, because the metal lining pipe 6 has undergone plastic deformation and expansion, even if the present invention is withdrawn, the metal lining pipe 6 remains tightly compounded on the inner wall of the pipeline 1.

The above are only the preferred embodiments of the present invention, and are not used to limit the protection scope of the present invention.

Claims

A lining composite device for pipelines, the lining composite device is used in a pipeline, and is characterized in that it comprises a cylindrical cylinder, a steering head, a pressure control connector, an annular sealing component, and a metal lining pipe;

One end of the cylindrical barrel is used for injecting pressure fluid, and a plurality of pressure fluid injection holes are arranged in the radial direction of the cylindrical barrel; the other end of the cylindrical barrel is connected with a guide head;

The pressure control connector is arranged in the central pore of the cylindrical cylinder, and is used to divide the central pore into a first pressure fluid container and a second pressure fluid container, and is communicated through the pore on the pressure control connector; The pressure fluid injection port provided in cooperation with the cylindrical barrel injects the pressure fluid in the first pressure fluid chamber to the outside of the cylindrical barrel;

The annular sealing assembly is sleeved on both sides of the cylindrical cylinder, and is used to seal the two ends of the metal liner after being driven by the pressure fluid from the first pressure fluid tank and the second pressure fluid tank;

The metal lining tube is sleeved outside the annular sealing assembly and the cylindrical body, and forms a cavity containing pressure fluid between the outer wall of the cylindrical body and the annular sealing assembly.
The lining composite device for pipelines according to claim 1, wherein the pressure control connector comprises a cylindrical connecting cylinder, a guide steel column, and a shear pin, and the guide steel column passes through the shear pin. It is fixed on the cylindrical connecting cylinder body facing the side where the pressure liquid is injected into the cylindrical cylinder body.
The lining composite device for pipelines according to claim 2, wherein the cylindrical connecting cylinder is provided with a first pressure fluid injection device in the axial direction of the first pressure fluid tank and the second pressure fluid tank. The cylindrical connecting cylinder is provided with a communicating second pressure fluid injection channel at corresponding positions in the radial direction of the cylindrical connecting cylinder and the cylindrical cylinder; the guide steel column is provided with a second pressure fluid injection channel that can match The third pressure fluid is injected into the hole.
The lining composite device for pipelines according to any one of claims 1 to 3, wherein the annular sealing assembly comprises a first annular piston, a first elastic sealing ring, a second annular piston, and a second elastic A first elastic sealing ring is arranged in the displacement direction of the first annular piston, and a second elastic sealing ring is arranged in the displacement direction of the second annular piston.
The lining composite device for pipelines according to claim 4, further comprising a first pressure ring, a second pressure ring, the first pressure ring, the first elastic sealing ring, and the first annular piston in sequence It is sleeved on one side of the cylindrical body; the second annular piston, the second elastic sealing ring, and the second pressure ring are sleeved on the other side of the cylindrical body in sequence.
The lining composite device for pipelines according to claim 5, wherein a fourth pressure fluid injection channel is arranged radially on one side of the cylindrical body, and the fourth pressure fluid injection channel is in line with the first pressure The liquid tank is connected; a fifth pressure liquid injection channel is arranged radially on the other side of the cylindrical body, and the fifth pressure liquid injection channel is in communication with the second pressure liquid tank.
The lining composite device for pipelines according to claim 6, wherein the first annular piston is formed between the distal end surface of the end surface of the first elastic sealing ring and the cylindrical body of the first annular piston. Liquid injection cavity, the first annular piston liquid injection cavity is in communication with the fourth pressure fluid injection channel; the second annular piston abuts against the second elastic seal ring and the cylindrical barrel forms a second An annular piston liquid injection cavity, and the second annular piston liquid injection cavity is in communication with a fifth pressure liquid injection channel.
The lining composite device for pipelines according to claim 7, wherein the cylindrical body abuts against the end surface of the first pressure ring; and the guide head abuts against the end surface of the second pressure ring.
The lining composite device for pipelines according to claim 8, wherein the first elastic sealing ring and the second elastic sealing ring respectively abut against both ends of the inner wall of the metal lining pipe.
The lining composite device for pipelines according to claim 9, characterized in that the two end faces of the metal lining pipe abut against the end faces of the first pressure ring and the second pressure ring respectively.