WO2021026749A1

WO2021026749A1 - Compound lining apparatus for pipeline

Info

Publication number: WO2021026749A1
Application number: PCT/CN2019/100319
Authority: WO
Inventors: 屈波
Original assignee: 屈波
Priority date: 2019-08-12
Filing date: 2019-08-13
Publication date: 2021-02-18
Also published as: CN110485960A

Abstract

A compound lining apparatus for a pipeline, comprising a cylindrical body (2), a directing head (3), a control connector (4),an annular sealing assembly (5), and a metal lining tube (6). One end of the cylindrical body (2) is used for injecting a pressurized liquid, and the other end is connected to the directing head (3). The controller (4) is arranged in a central channel of the cylindrical body (2). The annular sealing assembly (5) comprises an upper annular sealing assembly (51) and a lower annular sealing assembly (52), the upper annular sealing assembly (51) being sleeved on a first cylindrical body (21), and the lower annular sealing assembly (52) being sleeved on a second cylindrical body (23). The metal lining (6) is sleeved outside the annular sealing assembly (5) and the cylindrical body (2). The present apparatus features a simple and reliable structure, convenient construction, and low operating costs, does not require assistance of a pyrotechnic device, does not require high-cost components and auxiliary installations, and does not require a large hydraulic fracturing truck.

Description

Pipeline composite lining device

Technical field

The invention belongs to the technical field of oil and gas extraction in oil fields, and specifically relates to a pipeline composite lining device.

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 pipeline composite lining device.

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 pipeline composite lining device. The pipeline composite lining device is applied in a pipeline and includes a cylindrical cylinder, a steering head, a control connector, an annular sealing component, and a metal lining pipe;

The cylindrical body includes a first cylindrical body, a connecting tube, and a second cylindrical body; one end of the first cylindrical body is used for injecting pressure fluid, and the other end is connected to one end of the second cylindrical body through a connecting tube , The other end of the second cylindrical body is connected with the guide head; the first cylindrical body and the second cylindrical body are respectively provided with a plurality of pressure fluid injection holes in the radial direction;

The control connector is arranged in the central hole of the cylindrical cylinder, and is used to communicate with the first pressure fluid tank in the first cylinder, the connecting pipe and the second pressure fluid tank in the second cylinder; The pressure fluid injection port provided in cooperation with the first cylinder body injects the pressure fluid in the first pressure fluid chamber to the outside of the first cylinder body;

The ring seal assembly includes an upper ring seal assembly and a lower ring seal assembly. The upper ring seal assembly is sleeved on the first cylindrical cylinder and is used to control the pipeline after being driven by the pressure fluid from the first pressure fluid tank. The upper end of the area to be compounded is sealed with the upper end of the metal lining pipe; the lower ring-shaped sealing assembly is sleeved on the second cylindrical cylinder, and is used for the pipeline to be compounded after being driven by the pressure fluid from the second pressure fluid tank Seal the lower end of the area and the lower end of the metal lining pipe;

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 control connector includes a cylindrical connecting cylinder, a guide steel column, and a shear pin. The guide steel column is fixed by the shear pin to the cylindrical connecting cylinder facing the first cylindrical cylinder to inject pressure fluid. One end.

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 first cylinder. The corresponding position in the radial direction of the cylinder is provided with a connected second pressure fluid injection channel; the guide steel column is provided with a third pressure fluid injection channel that can be matched with the second pressure fluid injection channel.

In the above solution, the upper annular seal assembly includes a first annular piston, a first elastic sealing ring, a second annular piston, and a second elastic sealing ring. The first annular piston and the second annular piston are respectively arranged in the first cylinder. The two sides of the cylinder are relatively displaced, 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.

In the above solution, a first annular piston injection chamber is formed between the distal end surface of the end surface of the first annular piston abutting the first elastic sealing ring and one end of the first cylindrical body, and the second annular piston abuts A second annular piston liquid injection cavity is formed between the distal end surface of the end surface of the second elastic sealing ring and the other end of the first cylindrical body.

In the above solution, the first annular piston liquid injection cavity is in communication with the fourth pressure fluid injection channel in the radial direction of the first cylindrical body; the second annular piston liquid injection cavity is connected to the fifth radial direction of the first cylindrical body. The pressure fluid injection channel is connected.

In the above solution, the lower annular seal assembly includes a third annular piston, a third elastic sealing ring, a fourth annular piston, and a fourth elastic sealing ring, and the third annular piston and the fourth annular piston are respectively arranged in the second cylinder The two sides of the cylinder are relatively displaced, a third elastic sealing ring is arranged in the displacement direction of the third annular piston, and a fourth elastic sealing ring is arranged in the displacement direction of the fourth annular piston.

In the above solution, a third annular piston injection chamber is formed between the distal end surface of the end face of the third annular piston abutting the third elastic sealing ring and the second cylindrical body, and the fourth annular piston abuts the fourth A fourth annular piston liquid injection cavity is formed between the distal end surface of the end surface of the elastic sealing ring and the second cylindrical barrel.

In the above solution, the third annular piston liquid injection cavity is in communication with the sixth pressure fluid injection channel in the radial direction of the second cylindrical body; the fourth annular piston liquid injection cavity is connected to the seventh radial direction of the second cylindrical body. The pressure fluid injection channel is connected.

In the above solution, the second elastic sealing ring and the third elastic sealing ring respectively abut against both ends of the inner wall of the metal liner; the first elastic sealing ring and the fourth elastic sealing ring are compressed in the axial direction and in the radial direction. After expansion, they abut against both ends of the inner wall of the pipe 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

Figure 1 is a schematic structural diagram of a pipeline composite lining device according to an embodiment of the present invention;

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

FIG. 3 is a schematic structural diagram of a pipe composite lining device provided by an embodiment of the present invention after sealing both ends of a metal lining pipe;

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

Among them, 1-pipe, 2-cylindrical barrel, 3-direction head, 4-control connector, 5-ring seal assembly, 6-metal lining pipe, 21-first cylindrical barrel, 22-connecting pipe, 23-Second cylindrical barrel, 24-Upper joint, 211-First pressure fluid tank, 221-Second pressure fluid tank, 212-Fourth pressure fluid injection channel, 213-Fifth pressure fluid injection channel, 231-No. Six pressure fluid injection channels, 232-seventh pressure fluid injection channels, 61-cavity, 41-cylindrical connecting cylinder, 42-guide steel column, 43-shear pin, 411-first pressure fluid injection channel, 412 -Second pressure fluid injection port, 421-third pressure fluid injection port, 51-upper annular seal assembly, 52-lower annular seal assembly, 511-first annular piston, 512-first elastic sealing ring, 513-second Annular piston, 514-second elastic sealing ring, 521-third annular piston, 522-third elastic sealing ring, 523-fourth annular piston, 524-fourth elastic sealing ring, 5111-first annular piston injection cavity , 5131-second annular piston injection chamber, 5211-third annular piston injection chamber, 5231-fourth annular piston injection chamber.

detailed description

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 pipeline composite lining device, the lining composite device is applied in the pipeline 1, as shown in FIG. 1, the pipeline composite lining device is applied in the pipeline 1, and includes a cylindrical cylinder 2, a guide Head 3, control connector 4, ring seal assembly 5, metal lining pipe 6;

The cylindrical body 2 includes a first cylindrical body 21, a connecting tube 22, and a second cylindrical body 23 that are connected in sequence; one end of the first cylindrical body 21 is used for injecting pressure fluid, and the second cylindrical body The other end of the body 23 is connected with the guide head 3; the first cylindrical body 21 and the second cylindrical body 23 are respectively provided with a plurality of pressure fluid injection holes in the radial direction;

The control connector 4 is arranged in the central hole of the first cylindrical barrel 21, and is used to communicate with the first pressure fluid reservoir 211 in the second cylindrical barrel 21 and the connecting pipe 22 and the second cylindrical barrel 23. The second pressure fluid reservoir 221; is also used for injecting the pressure fluid in the first pressure fluid reservoir 211 into the outside of the first cylindrical barrel 21 through the pressure fluid injection port provided in cooperation with the first cylindrical barrel 21;

The annular seal assembly 5 includes an upper annular seal assembly 51 and a lower annular seal assembly 52. The upper annular seal assembly 51 is sleeved on the first cylindrical cylinder 21 for receiving pressure from the first pressure fluid chamber 211. After the liquid is driven, the upper end of the pipeline 1 to be compounded area and the upper end of the metal lining pipe 6 are sealed; the lower annular sealing assembly 52 is sleeved on the second cylindrical cylinder 23 for receiving pressure from the second pressure liquid silo 221 After being driven by the pressure fluid, the lower end of the pipeline 1 and the lower end of the metal lining pipe 6 are sealed;

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 211 and the second pressure fluid tank 221 drives the displacement of the annular seal assembly 5 through the pressure fluid injection port, thereby realizing the shaft of the annular seal assembly 5. Compression and radial expansion, high-pressure-resistant sealing is performed on the upper and lower ends of the area to be compounded in the pipeline 1, so that the upper and lower ends of the area to be compounded in the pipeline 1 are sealed, and both ends of the inner wall of the metal lining pipe 6 are squeezed to make The two ends of the metal lining pipe 6 produce radial plastic deformation and are attached to the inner wall of the pipe 1, thereby achieving high pressure sealing at both ends of the metal lining pipe 6. After that, the pressure fluid in the first pressure fluid tank 211 The control connector 4 continues to apply pressure. After the pressure received by the control connector 4 exceeds the set pressure value, the pressure fluid injection channel connecting the first pressure fluid reservoir 211, the control connector 4 and the cavity 61 is opened, and the pressure fluid is injected Into the cavity 61, the pressure fluid in the cavity 61 uniformly applies pressure to the inner wall of the metal lining tube 6, causing the metal lining tube 6 to produce radial plastic deformation, and finally the outer wall of the entire metal lining tube 6 closely adheres Attached to the inner wall of the pipeline 1, and subsequently, the injection of the pressure liquid at one end of the cylindrical cylinder 2 is stopped, the pressure is released, the annular sealing assembly 5 is reset, and the present invention is withdrawn, while the metal lining pipe 6 remains stationary to achieve sealing Block subsidies.

One end of the first cylindrical barrel 21 for injecting pressure fluid is connected to the uphole equipment through the upper joint 24.

The connecting pipe 22 can be a hose to realize the soft connection between the first cylindrical barrel 21 and the second cylindrical barrel 23. Of course, the length and thickness of the connecting pipe 22 can also be determined according to needs.

The connecting pipe 22 can also adopt the same components such as a sleeve to realize a rigid connection between the first cylindrical body 21 and the second cylindrical body 23.

The 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 to the cylindrical connecting cylinder 41 by the shear pin 43 and faces the first cylindrical cylinder 21. 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 211 and the second pressure fluid tank 221, and the cylindrical connecting cylinder 41 is radially connected to the first pressure fluid tank 221. A communicating second pressure fluid injection hole 412 is provided at a corresponding position in the radial direction of the cylindrical barrel 21; the guide steel column 42 is provided with a third pressure fluid injection hole 421 that can be matched with the second pressure fluid injection hole 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 211 and the second pressure fluid reservoir 221.

The pressure fluid in the first pressure fluid tank 211 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 211 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 upper annular seal assembly 51 includes a first annular piston 511, a first elastic sealing ring 512, a second annular piston 513, and a second elastic sealing ring 514. The first annular piston 511 and the second annular piston 513 are respectively arranged at Both sides of the first cylindrical body 21 are relatively displaced, a first elastic sealing ring 512 is arranged in the displacement direction of the first annular piston 511, and a second elastic sealing ring 514 is arranged in the displacement direction of the second annular piston 513 .

A first annular piston injection chamber 5111 is formed between the distal end surface of the end surface of the first annular piston 511 abutting the first elastic sealing ring 512 and one end of the first cylindrical cylinder 21, and the second annular piston 513 abuts A second annular piston injection cavity 5131 is formed between the distal end surface of the end surface of the second elastic sealing ring 514 and the other end of the first cylindrical body 21.

The first annular piston liquid injection chamber 5111 communicates with the fourth pressure fluid injection channel 212 in the radial direction of the first cylindrical body 21; the second annular piston liquid injection chamber 5131 and the first cylindrical body 21 in the radial direction Five pressure fluid injection channels 213 are connected.

The lower annular seal assembly 52 includes a third annular piston 521, a third elastic sealing ring 522, a fourth annular piston 523, and a fourth elastic sealing ring 524. The third annular piston 521 and the fourth annular piston 523 are respectively arranged at Both sides of the second cylindrical body 23 are relatively displaced, a third elastic sealing ring 522 is provided in the displacement direction of the third annular piston 521, and a fourth elastic sealing ring 524 is provided in the displacement direction of the fourth annular piston 523. .

A third annular piston liquid injection chamber 5211 is formed between the distal end surface of the end surface of the third annular piston 521 abutting the third elastic sealing ring 522 and the second cylindrical body 23, and the fourth annular piston 523 abuts the first A fourth annular piston injection cavity 5231 is formed between the distal end surface of the end surface of the four elastic sealing ring 524 and the second cylindrical body 23.

The third annular piston liquid injection chamber 5211 communicates with the sixth pressure liquid injection channel 231 in the radial direction of the second cylindrical body 23; the fourth annular piston liquid injection chamber 5231 and the second cylindrical body 23 in the radial direction Seven pressure fluid injection channels 232 are connected.

The pressure fluid in the first pressure fluid reservoir 211 is injected into the first annular piston fluid injection chamber 5111 through the fourth pressure fluid injection channel 212, and pushes the first annular piston 511 to shift to the right; the first pressure fluid reservoir 211 The pressure fluid inside is also injected into the second annular piston liquid injection chamber 5131 through the fifth pressure fluid injection channel 213, pushing the second annular piston 513 to move leftward.

Similarly, the pressure fluid in the second pressure fluid tank 221 is injected into the third annular piston fluid injection chamber 5211 through the sixth pressure fluid injection channel 231, pushing the third annular piston 53 to shift to the right; the second pressure The pressure liquid in the liquid tank 221 is also injected into the fourth annular piston liquid injection chamber 5231 through the seventh pressure liquid injection passage 232, and pushes the fourth annular piston 523 to move to the left.

The second elastic sealing ring 514 and the third elastic sealing ring 522 abut against both ends of the inner wall of the metal liner pipe 6 respectively; the first elastic sealing ring 512 and the fourth elastic sealing ring 524 are compressed and radially compressed in the axial direction. After expanding, they abut against both ends of the inner wall of the pipe 1 respectively.

The pressure fluid in the first pressure fluid reservoir 211 is injected into the first annular piston fluid injection chamber 5111 through the fourth pressure fluid injection port 212, and drives the first annular piston 511 to shift to the right, the first annular piston 511 The rightward pressure is transferred to the first elastic sealing ring 512; the pressure liquid in the first pressure liquid chamber 211 is also injected into the second annular piston liquid injection chamber 5131 through the fifth pressure liquid injection passage 213, pushing the second annular piston The piston 513 is displaced to the left, and the second annular piston 5131 transmits leftward pressure to the second elastic sealing ring 513.

Similarly, the pressure fluid in the second pressure fluid tank 221 is injected into the third annular piston fluid injection chamber 5211 through the sixth pressure fluid injection port 231, and the third annular piston 521 is driven to shift to the right, and the third The annular piston 521 transfers rightward pressure to the third elastic sealing ring 522, and the pressure fluid in the second pressure fluid chamber 221 is also injected into the fourth annular piston fluid injection chamber 5231 through the seventh pressure fluid injection channel 232, pushing The fourth annular piston 523 is displaced to the left, and the fourth annular piston 523 transmits leftward pressure to the fourth elastic sealing ring 524.

In this way, the first elastic sealing ring 512, the second elastic sealing ring 514, the third elastic sealing ring 522, and the fourth elastic sealing ring 523 are respectively compressed and expanded radially after being pressed; the first elastic sealing ring The ring 512 and the fourth elastic sealing ring 523 are subjected to pressure and produce axial compression and radial expansion, and then squeeze with both ends of the inner wall of the pipe 1 to achieve high pressure sealing of the upper and lower parts of the area to be compounded. After the second elastic sealing ring 514 and the third elastic sealing ring 522 are subjected to pressure to produce axial compression and radial expansion, they squeeze both ends of the inner wall of the metal lining pipe 6, and finally realize the upper and lower ends of the pipeline 1 to be compounded. And the high pressure seal at both ends of the inner wall of the metal lining pipe 6.

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 211 through the upper joint 24, and the pressure fluid in the first pressure fluid tank 21 is also injected into the second pressure fluid tank through the first pressure fluid injection port 411 of the control connector 4 221. Under the effect of the continuous injection of pressure fluid into the upper joint 24, the pressure fluid in the first pressure fluid tank 211 and the second pressure fluid tank 221 generates a driving pressure F;

(2) Start the sealing process:

The sealing process includes a sealing process of the upper and lower parts of the pipeline 1 to be sealed and leak-filling areas and a process of sealing both ends of the metal lining pipe 6.

As shown in FIG. 2, after the driving pressure of the present invention is generated, the annular seal assembly 5 is preferred when the third pressure fluid injection port 421 and the second pressure fluid injection port 412 are not aligned and not opened. Start automatically.

As the first annular piston 511 moves to the right, pressure is transmitted to the first elastic sealing ring 512, and the fourth annular piston 523 is displaced to the left, transmitting pressure to the fourth elastic sealing ring 523, the first elastic sealing ring 512 The axial width of the fourth elastic sealing ring 523 and the fourth elastic sealing ring 523 are reduced. The first elastic sealing ring 512 and the fourth elastic sealing ring 523 expand in the radial direction to respectively squeeze the upper and lower ends of the inner wall of the pipeline 1 to realize the pipeline 1 High pressure-resistant seals at the upper and lower ends of the area to be compounded.

As shown in FIG. 3, as the second annular piston 512 is displaced to the left, pressure is transmitted to the second elastic sealing ring 514, and the third annular piston 521 is displaced to the right to transmit the pressure to the third elastic sealing ring 522; under the continuous action of the driving pressure F, the axial width of the second elastic sealing ring 514 and the third elastic sealing ring 522 becomes smaller, the second elastic sealing ring 514 and the third elastic sealing ring 522 radially The two ends of the inner wall of the metal lining pipe 6 are respectively squeezed to make radial plastic deformation at both ends of the inner wall of the metal lining pipe 6 and squeezed to the inner wall of the pipe 1 to realize the two High pressure-resistant seal on the inner wall of the end.

When the axial compression deformation of the first elastic sealing ring 512, the second elastic sealing ring 514, the third elastic sealing ring 522, and the fourth elastic sealing ring 523 reach the deformation amount required by the design, the design requirement is guaranteed Sealing pressure level.

(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 chamber 211 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 opened, and the pressure liquid located in the first pressure liquid chamber 211 is injected into the cavity 61 through the opened pressure liquid injection channel.

The pressure fluid in the cavity 61 uniformly applies pressure to the inner wall of the metal lining pipe 6 to cause the metal lining pipe 6 to undergo plastic deformation. The outer wall of the entire metal lining pipe 6 is tightly squeezed against the inner wall of the pipe 1 to achieve sealing. Block subsidies.

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

(5) The withdrawal process of the present invention:

After the metal liner 6 completes the plugging and subsidy, the uphole equipment stops injecting pressure fluid into the first pressure fluid tank 211 through the upper joint 25 to release the pressure, and the present invention is in a pressure relief state;

The first annular piston 511, the second annular piston 513, the third annular piston 521, and the fourth annular piston return to the initial position, the first elastic sealing ring 512, the second elastic sealing ring 514, and the third elastic sealing ring 522 and the fourth elastic sealing ring 523 gradually reset after losing the pressure of the corresponding annular piston. In this way, the first elastic sealing ring 512 and the fourth elastic sealing ring 524 are separated from both ends of the inner wall of the pipe 1 and the second After the second elastic sealing ring 514 and the third elastic sealing ring 522 are separated from the two ends of the inner wall of the metal lining pipe 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 pipeline composite lining device, which is applied in a pipeline, and is characterized in that it comprises a cylindrical cylinder, a steering head, a control connector, an annular sealing component, and a metal lining pipe;

The cylindrical body includes a first cylindrical body, a connecting tube, and a second cylindrical body; one end of the first cylindrical body is used for injecting pressure fluid, and the other end is connected to one end of the second cylindrical body through a connecting tube , The other end of the second cylindrical body is connected with the guide head; the first cylindrical body and the second cylindrical body are respectively provided with a plurality of pressure fluid injection holes in the radial direction;

The control connector is arranged in the central hole of the cylindrical cylinder, and is used to communicate with the first pressure fluid tank in the first cylinder, the connecting pipe and the second pressure fluid tank in the second cylinder; The pressure fluid injection port provided in cooperation with the first cylinder body injects the pressure fluid in the first pressure fluid chamber to the outside of the first cylinder body;

The ring seal assembly includes an upper ring seal assembly and a lower ring seal assembly. The upper ring seal assembly is sleeved on the first cylindrical cylinder and is used to control the pipeline after being driven by the pressure fluid from the first pressure fluid tank. The upper end of the area to be compounded is sealed with the upper end of the metal lining pipe; the lower ring-shaped sealing assembly is sleeved on the second cylindrical cylinder, and is used for the pipeline to be compounded after being driven by the pressure fluid from the second pressure fluid tank Seal the lower end of the area and the lower end of the metal lining pipe;

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 pipeline composite lining device according to claim 1, wherein the control connector comprises a cylindrical connecting cylinder, a guide steel column, and a shear pin, and the guide steel column is fixed to the cylindrical shape by the shear pin. The connecting cylinder faces the end of the first cylindrical cylinder where the pressure liquid is injected.
The pipeline composite lining device according to claim 2, wherein 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, so The cylindrical connecting cylinder is provided with a communicating second pressure fluid injection port in the radial direction and the corresponding position in the radial direction of the first cylinder; the guide steel column is provided with a second pressure fluid injection port that can be matched with the second pressure fluid injection port. Three pressure fluid is injected into the hole.
The pipeline composite lining device according to any one of claims 1-3, wherein the upper annular sealing assembly comprises a first annular piston, a first elastic sealing ring, a second annular piston, and a second elastic sealing ring , The first annular piston and the second annular piston are respectively arranged on both sides of the first cylindrical cylinder and are relatively displaced, a first elastic sealing ring is arranged in the displacement direction of the first annular piston, and the second annular piston A second elastic sealing ring is arranged in the direction of displacement.
The pipeline composite lining device according to claim 4, wherein a first ring shape is formed between the distal end surface of the end surface of the first annular piston abutting the first elastic sealing ring and one end of the first cylindrical body. Piston liquid injection cavity, a second circular piston liquid injection cavity is formed between the distal end surface of the end surface of the second annular piston abutting the second elastic sealing ring and the other end of the first cylindrical body.
The pipeline composite lining device according to claim 5, wherein the first annular piston injection cavity is in communication with a fourth pressure fluid injection passage in the radial direction of the first cylindrical body; the second annular piston injection The liquid cavity is communicated with the fifth pressure liquid injection channel in the radial direction of the first cylindrical barrel.
The pipeline composite lining device according to claim 6, wherein the lower annular sealing assembly comprises a third annular piston, a third elastic sealing ring, a fourth annular piston, and a fourth elastic sealing ring. The annular piston and the fourth annular piston are respectively arranged on both sides of the second cylindrical body and are relatively displaced. A third elastic sealing ring is arranged in the displacement direction of the third annular piston, and a third elastic sealing ring is arranged in the displacement direction of the fourth annular piston. The fourth elastic sealing ring.
The pipeline composite lining device according to claim 7, wherein a third annular piston injection is formed between the distal end surface of the end face of the third annular piston abutting the third elastic sealing ring and the second cylindrical body. In the liquid cavity, a fourth annular piston liquid injection cavity is formed between the distal end surface of the end surface of the fourth annular piston abutting the fourth elastic sealing ring and the second cylindrical body.
The pipeline composite lining device according to claim 8, wherein the third annular piston injection cavity is in communication with a sixth pressure fluid injection channel in the radial direction of the second cylindrical body; the fourth annular piston injection The liquid cavity is communicated with the seventh pressure liquid injection channel in the radial direction of the second cylindrical barrel.
The pipeline composite lining device according to claim 9, wherein the second elastic sealing ring and the third elastic sealing ring respectively abut against both ends of the inner wall of the metal lining pipe; the first elastic sealing ring , The fourth elastic sealing ring abuts against both ends of the inner wall of the pipeline after axial compression and radial expansion.