CN111749640B - A packer, a method for processing a packer, and a method for setting a packer - Google Patents

Abstract

The invention discloses a packer, a processing method of the packer, and a setting method of the packer. An inner metal tube is arranged on the inner rubber cylinder of the packer, and the inner metal tube can play a role in the inner rubber cylinder. It has a protective effect to prevent friction between the support frame and the inner rubber cylinder when it expands, and the inner metal tube is fixedly connected to the inner rubber cylinder, and the outer rubber cylinder is fixedly connected to the outer metal tube. When the packer expands, the support frame is relative to the inner metal tube. The relative displacement of the tube and the outer metal tube occurs, but the inner metal tube and the inner rubber tube and between the outer rubber tube and the outer metal tube expand synchronously, and the inner rubber tube is connected to the supporting skeleton through the inner metal tube and the outer rubber tube through the outer metal tube. The isolation between the packers ensures that the packer will not directly contact the inner rubber cylinder and the outer rubber cylinder during the expansion process, thereby effectively overcoming the friction of the support frame of the packer on the inner rubber cylinder and the outer rubber cylinder in the prior art. The problem of tearing of the inner rubber barrel and the outer rubber barrel due to stress concentration reduces the setting failure rate of the packer.

Description

A packer, a method for processing a packer, and a method for setting a packer

technical field

The invention relates to the technical field of downhole applications in oil fields, in particular to a packer, a processing method for the packer and a method for setting the packer.

Background technique

In the downhole construction and completion process of oil development and drilling and completion, the packer is an important downhole tool in fracturing, water injection, water plugging, channeling inspection, drilling and completion, etc. The packer passes through the rubber barrel. The outward expansion of the annular space between the isolation tubing and the casing plays the role of setting control, allowing gas or liquid to pass through the central channel and controlling the flow of fluid.

In the prior art, the packer includes an inner rubber cylinder, an outer rubber cylinder and a supporting frame, wherein the inner rubber cylinder is sleeved on the central channel, the outer rubber cylinder is sleeved on the inner rubber cylinder, and the supporting frame is located between the inner rubber cylinder and the outer rubber cylinder. between the cartridges. In the process of hydraulic loading and expansion, there will be relative movement between the support frame and the inner and outer rubber cylinders, resulting in tearing of the inner and outer rubber cylinders due to stress concentration, and the setting failure rate is as high as 50%.

Therefore, how to avoid tearing of the inner rubber cylinder and the outer rubber cylinder during the setting process of the packer, so as to reduce the setting failure rate of the packer, has become a technical problem to be solved urgently by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a packer to avoid tearing of the inner rubber barrel and the outer rubber barrel during the setting process of the packer, thereby reducing the setting failure rate of the packer. The invention also provides a method for processing the packer and a method for setting the packer.

To achieve the above object, the present invention provides the following technical solutions:

A packer comprising:

outer rubber cylinder;

inner connector;

an outer joint, sleeved on the outer wall of the inner joint;

an outer metal tube, the outer rubber tube is sleeved on the outer metal tube, and the end of the outer metal tube is connected with the inner wall of the outer joint;

A support frame, which can expand and contract along its own circumferential direction, is located in the outer metal tube and is connected to the inner wall of the outer joint;

The inner rubber cylinder is installed in the support frame, and the inner rubber cylinder is provided with a central hole coaxially arranged with the inner rubber cylinder;

The inner metal tube is sleeved on the outer wall of the inner rubber cylinder and located in the support frame, and the ends of the inner metal tube and the inner rubber cylinder can abut against the inner joint.

Preferably, in the above-mentioned packer, the inner rubber cylinder is vulcanized and connected to the inner metal pipe.

Preferably, in the above packer, the outer rubber cylinder is vulcanized and connected to the outer metal pipe.

Preferably, in the above-mentioned packer, the support frame is connected to the inner wall of the outer joint by welding.

Preferably, in the above packer, the inner wall of the outer joint is provided with a first annular groove, and the outer metal pipe is located in the first annular groove and can be connected with the groove of the first annular groove balance at the bottom;

The support frame is located in the first annular groove.

Preferably, in the above-mentioned packer, the outer wall of the inner joint is provided with a second annular groove, and the inner metal tube and the inner rubber cylinder are located in the second annular groove and can be connected with the first annular groove. The groove bottoms of the two annular grooves abut against each other.

Preferably, in the above packer, the thickness of the outer metal pipe is greater than the thickness of the inner metal pipe.

This scheme discloses a processing method of a packer, comprising the steps of:

The outer rubber tube is sleeved on the outer metal tube;

Sleeve the inner rubber tube on the inner metal tube;

vulcanizing and connecting the outer rubber cylinder and the outer metal pipe, the inner rubber cylinder and the inner metal pipe;

Connect a first outer joint at the first end of the support frame;

The inner rubber cylinder and the inner metal tube after vulcanization connection are loaded into the support frame;

The outer rubber cylinder and the outer metal tube after vulcanization connection are sleeved on the support frame;

connecting a second outer joint at the second end of the support frame;

The first inner joint and the second outer joint are respectively installed into the first outer joint and the second outer joint, and the inner rubber cylinder and the inner metal tube after compressing and vulcanization are placed between the first inner joint and the second outer joint. between the second inner joints.

This scheme discloses a method for setting a packer, comprising the steps of:

Send the packer to the setting position of the wellbore through coiled tubing, and connect the packer with the pressure control sealing device;

The packer is hydraulically pressurized by a pressure pump on the ground, and when the pressure reaches a preset threshold, the pressure control sealing device is opened to release the pressure and separate from the coiled tubing and the packer.

Preferably, in the above-mentioned method for setting a packer, an inspection step is further included, and the inspection step includes:

connecting the first end of the packer to the coiled tubing, and the second end of the packer to the pressure control sealing device;

Water was injected into the packer through the pressurizing pump to check the tightness of the packer.

It can be seen from the above technical solutions that the packer provided by the present invention is provided with an inner metal tube on the inner rubber cylinder. There is friction between the inner rubber tube and the inner rubber tube, and the inner metal tube is fixedly connected to the inner rubber tube, and the outer rubber tube is fixedly connected to the outer metal tube. When the packer expands, the support frame is relatively opposite to the inner metal tube and the outer metal tube. Displacement, but the inner metal tube and the inner rubber tube and the outer rubber tube and the outer metal tube expand synchronously, and the inner rubber tube is isolated from the support frame through the inner metal tube and the outer rubber tube through the outer metal tube to ensure the sealing The spacer will not directly contact the inner rubber cylinder and the outer rubber cylinder during the expansion process, thereby effectively overcoming the friction of the support frame of the packer on the inner rubber cylinder and the outer rubber cylinder in the prior art. The problem of barrel tearing due to stress concentration reduces the set failure rate of the packer.

The invention also discloses a processing method of the packer, which is used to manufacture the above-mentioned packer. Since the packer has the above technical effect, the packer manufactured by the processing method of the packer also has the same technical effect, which will not be repeated here.

The invention also discloses a setting method for the packer, which is used for installing the above packer. Since the packer has the above technical effect, the packer installed by the setting method of the packer also has the same technical effect, which will not be repeated here.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a packer provided in an embodiment of the present invention.

in,

1. Outer joint, 2. Outer rubber tube, 3. Outer metal tube, 4. Support frame, 5. Inner rubber tube, 6. Inner metal tube, 7. Inner joint.

Detailed ways

The invention discloses a packer, which can avoid tearing of an inner rubber cylinder and an outer rubber cylinder during the setting process of the packer and reduce the setting failure rate of the packer. The invention also discloses a processing method of the packer and a setting method of the packer.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention discloses a packer, please refer to FIG. 1 .

The packer disclosed in this scheme includes an outer rubber cylinder 2 , an outer metal pipe 3 , an inner joint 7 , an outer joint 1 , a support frame 4 , an inner rubber cylinder 5 and an inner metal pipe 6 .

The outer joint 1 is sleeved on the inner joint 7, the inner wall of the outer joint 1 is in contact with the outer wall of the inner joint 7, the outer joint 1 is used to connect with the support frame 4 and the outer metal pipe 3, and the two ends of the inner rubber cylinder 5 are provided with There is an inner joint 7, and the inner rubber cylinder 5 is pressed between the two inner joints 7.

The outer rubber tube 2 is sleeved on the outer metal tube 3 . In a specific embodiment of this solution, the outer rubber tube 2 is located in the middle of the outer metal tube 3, and the outer rubber tube 2 can be in contact with the sleeve and squeezed. Preferably, the length of the outer metal tube 3 is greater than the length of the outer rubber cylinder 2 .

The outer metal tube 3 is sleeved on the inner rubber cylinder 5 . In a specific embodiment of this solution, the length of the outer metal tube 3 is at least equal to the length of the inner rubber tube 5 . The inner rubber cylinder 5 is provided with a central hole coaxially arranged with the inner rubber cylinder 5 for allowing liquid or medium to pass through.

The whole formed by the outer metal tube 3 and the outer rubber cylinder 2 is located outside the support frame 4, and the outer metal tube 3 is sleeved on the support frame 4, and the whole formed by the inner metal tube 6 and the inner rubber cylinder 5 is located in the support frame 4, and The outer wall of the inner metal tube 6 is in contact with the inner wall of the support frame 4 .

In a specific embodiment of this solution, the outer rubber tube 2 is fixedly connected with the outer metal tube 3, and the inner metal tube 6 is fixedly connected with the inner rubber tube 5, so that the outer rubber tube 2 and the outer metal tube 3 and the inner metal tube 6 and the inner metal tube 6 are fixedly connected. The connection interface of the inner rubber tube 5 undergoes the same displacement during the expansion process, and no cracking occurs.

The support frame 4 is a support frame 4 having a plurality of strip-shaped metal sheets, and the plurality of strip-shaped metal sheets are evenly distributed, and both the first end and the second end of the support frame 4 are connected to the external joint 1 . It should be noted here that the first end of the support frame 4 is opposite to the second end of the support frame 4 , specifically the two free ends of the support frame 4 . The support frame 4 can expand and contract along its own circumferential direction. In this solution, it is required that the width between adjacent strip-shaped metal sheets should not be too large, so as to prevent the support frame 4 from being bent and deformed. Moreover, the supporting frame is deformed irreversibly by the action of internal pressure.

In a specific embodiment of this solution, the number of the outer joints 1 is two, which are located at both ends of the support frame 4, and the number of the inner joints 7 is also two, which are located at the two ends of the inner rubber cylinder 5, respectively. The inner joint 7 is located in the outer joint 1 , and the inner joint 7 is connected with the outer joint 1 .

Preferably, both the inner joint and the outer joint are metal joints.

The specific assembly process is as in a specific embodiment of this solution, firstly, the outer rubber tube 2 is sleeved on the outer metal tube 3, then the inner metal tube 6 is sleeved on the outer rubber tube 2, and then the outer rubber tube 2 and the outer rubber tube 2 are sleeved. The combination of the metal tube 3 and the combination of the inner metal tube 6 and the inner rubber tube 5 are respectively vulcanized to realize the connection between the outer rubber tube 2 and the outer metal tube 3 and the fixed connection between the inner metal tube 6 and the inner rubber tube 5, and then Connect the first end of the support frame 4 with an outer joint 1, then apply lubricating oil on the inner wall of the outer metal tube 3, and put the combination of the outer rubber cylinder 2 and the outer metal tube 3 on the second end of the self-supporting frame 4. On the support frame 4, then apply lubricating oil to the outer wall of the inner metal tube 6, and put the combination of the inner metal tube 6 and the inner rubber cylinder 5 into the support frame 4 from the second end of the support frame 4, and then put the support frame The second end of 4 is connected with the outer joint 1 , and finally the inner joint 7 is matched with the outer joint 1 , and the combination of the inner metal tube 6 and the inner rubber cylinder 5 is compressed between the two inner joints 7 .

The lubricating oil between the support frame 4 and the combination of the inner metal tube 6 and the inner rubber tube 5 and the lubricating oil between the support frame 4 and the combination of the outer rubber tube 2 and the outer metal tube 3 play a lubricating role, further reducing the Damage to inner metal tube 6 and outer metal tube 3.

In this solution, the outer rubber cylinder 2 and the outer metal tube 3 can be connected by vulcanization, or other connection methods can be used to ensure that the outer rubber cylinder 2 and the outer metal tube 3 do not move relative to each other during the expansion process. Which connection mode is selected by those skilled in the art according to actual needs.

The outer rubber tube 2 and the outer metal tube 3 and the inner metal tube 6 are vulcanized and connected to the inner rubber tube 5, so that the outer rubber tube 2 and the inner rubber tube 5 have the function of resisting hydrogen sulfide corrosion, and have a high expansion rate with an expansion rate increased by 4 times. .

In this solution, the inner metal tube 6 and the inner rubber cylinder 5 can be connected by vulcanization, or other connection methods can be used to ensure that the inner metal tube 6 and the inner rubber cylinder 5 do not move relative to each other during the expansion process. Which connection mode is selected by those skilled in the art according to actual needs.

In a specific embodiment of the solution, the outer joint 1 and the inner joint 7 are connected by means of screw connection. The outer joint 1 and the inner joint 7 are preferably connected in a detachable manner, and the connection method of the outer joint 1 and the inner joint 7 is not limited to the threaded connection, and other detachable connection methods can also be selected.

In a specific embodiment of this solution, the support frame 4 is connected to the outer joint 1 by welding. The support frame 4 and the external joint 1 are preferably connected by fixed connection, not limited to welding connection, other connection methods can also be used, and even detachable connection methods can be used, which are not specifically limited here.

In the packer disclosed in this solution, an inner metal tube 6 is arranged on the inner rubber cylinder 5 , and the inner metal tube 6 can protect the inner rubber cylinder 5 and prevent the support frame 4 from expanding between the inner rubber cylinder 5 and the inner rubber cylinder 5 . The friction causes the inner rubber tube 5 to be damaged, and the inner metal tube 6 is fixedly connected with the inner rubber tube 5, and the outer rubber tube 2 is fixedly connected with the outer metal tube 3. When the packer expands, the support frame 4 is relative to the inner metal tube 6 and the outer metal tube 3. The outer metal tube 3 undergoes relative displacement, but the inner metal tube 6 and the inner rubber tube 5 and the outer rubber tube 2 and the outer metal tube 3 expand synchronously, and the inner rubber tube 5 passes through the inner metal tube 6 and the outer rubber tube 2 passes through the outer tube. The metal pipe 3 realizes isolation from the support frame 4 to ensure that the packer will not directly contact the inner rubber cylinder 5 and the outer rubber cylinder 2 during the expansion process, thereby effectively overcoming the support frame of the packer in the prior art. 4. The friction between the inner rubber cylinder 5 and the outer rubber cylinder 2 causes the problem of tearing of the inner rubber cylinder 5 and the outer rubber cylinder 2 due to stress concentration, which reduces the setting failure rate of the packer.

Send the packer to the wellbore setting position through coiled tubing, and connect the packer to the pressure control sealing device;

The packer is hydraulically pressurized by the pressure pump on the ground, so that the inner rubber cylinder, the inner metal pipe, the supporting frame, the outer metal pipe and the outer rubber cylinder are sequentially expanded from the inside to the outside, and the outer rubber cylinder is in contact with the casing and squeezed. When the pressure reaches the preset threshold, the pressure control sealing device opens to release the pressure. At this time, the water penetrates the packer, enters the wellbore through the inner rubber barrel, and finally separates from the coiled tubing and the packer. And pull the coiled tubing out of the wellbore.

The packer disclosed in this solution is less prone to tearing and damage, and prolongs the service life of the packer.

In a specific embodiment of this solution, the support frame 4 is directly connected to the external joint 1 by welding;

In another specific embodiment of this solution, the inner wall of the outer joint 1 is provided with a first annular groove, the support frame 4 is located in the first annular groove, and the first annular groove provides an installation space for the support frame 4 . Specifically, the support frame 4 is welded in the first annular groove.

As shown in FIG. 1, the outer metal tube 3 is also located in the first annular groove, the length of the support frame 4 is greater than the length of the outer metal tube 3, and the groove wall of the first annular groove is a stepped groove wall, and the stepped groove A step surface of the wall is connected with the support frame 4, and the support frame 4 can abut against the step surface, and another step surface of the stepped groove wall is connected with the outer metal tube 3, and the outer metal tube 3 can abut against the step surface.

As shown in FIG. 1 , the first annular groove is located on the end face of the outer joint 1 .

As shown in FIG. 1 , the outer wall of the inner joint 7 is provided with a second annular groove, the inner metal tube 6 and the inner rubber cylinder 5 are located in the second annular groove, and the ends of the inner metal tube 6 and the inner rubber cylinder 5 can be Abut against the groove bottom of the second annular groove.

The compression of the combination of the inner metal tube 6 and the inner rubber cylinder 5 by the inner joint 7 can also be achieved through the end face of the inner joint 7, and in this embodiment, a second annular groove does not need to be provided.

In this solution, a chamfer needs to be reserved at the contact between the inner joint 7 and the inner metal tube 6 to prevent the outer metal tube 3 from having a large bending curvature during the expansion process.

Preferably, the opening of the first annular groove and the second annular groove are both opened at the factory, which reduces the assembly difficulty of the packer.

In this solution, the thickness of the outer metal pipe 3 is greater than the thickness of the inner metal pipe 6 to ensure that the outer metal pipe 3 does not crack after the packer expands and expands. The thickness of the outer metal tube 3 is designed according to the expansion requirements, which is not specifically limited here.

The scheme also discloses a processing method of the packer, comprising the following steps:

Sleeve the outer rubber tube 2 on the outer metal tube 3;

Sleeve the inner rubber tube 5 on the inner metal tube 6;

Vulcanization connects the outer rubber tube 2 and the outer metal tube 3, the inner rubber tube 5 and the inner metal tube 6;

Connect the first outer joint 1 to the first end of the support frame 4;

The inner rubber cylinder 5 and the inner metal tube 6 after vulcanization connection are loaded into the support frame 4;

The outer rubber cylinder 2 and the outer metal tube 3 after vulcanization connection are sleeved on the support frame 4;

Connect the second outer joint 1 at the second end of the support frame 4;

The first inner joint 7 and the second outer joint 1 are installed into the first outer joint 1 and the second outer joint 1 respectively, and the vulcanized inner rubber cylinder 5 and the inner metal tube 6 are pressed into the first inner joint 7 and the second inner joint 1. between connector 7.

The outer rubber tube 2 and the outer metal tube 3 and the inner metal tube 6 are vulcanized and connected to the inner rubber tube 5, so that the outer rubber tube 2 and the inner rubber tube 5 have the function of resisting hydrogen sulfide corrosion, and have a high expansion rate with an expansion rate increased by 4 times. .

The inner metal tube 6 and the inner rubber tube 5 and the outer rubber tube 2 and the outer metal tube 3 are connected by vulcanization to ensure that the inner metal tube 6 and the inner rubber tube 5 and the outer rubber tube 2 and the outer metal tube 3 are not in the expansion process. Relative movement occurs, and the inner metal tube 6 and the inner rubber tube 5 and the outer rubber tube 2 and the outer metal tube 3 expand synchronously to avoid tearing of the inner rubber tube 5 and the outer rubber tube 2 during the expansion process of the packer.

Moreover, the inner rubber tube 5 is isolated from the support frame 4 through the inner metal tube 6, and the outer rubber tube 2 is isolated from the support frame 4 through the outer metal tube 3, so as to ensure that the packer will not be directly connected to the inner rubber tube 5 and the outer rubber tube during the expansion process. The contact of the barrel 2 effectively overcomes the problem of tearing of the inner rubber barrel 5 and the outer rubber barrel 2 due to stress concentration, and reduces the setting failure rate of the packer.

Before the combination of the outer rubber cylinder 2 and the outer metal tube 3 is matched with the support frame 4, lubricating oil can be applied to the outer wall of the support frame 4, and before the combination of the inner rubber cylinder 5 and the inner metal tube 6 is matched with the support frame 4 , lubricating oil can be smeared on the outer wall of the inner metal tube 6 to play a lubricating role and further reduce the damage to the inner metal tube 6 and the outer metal tube 3 .

The scheme also discloses a method for setting the packer, comprising the following steps:

Send the packer to the wellbore setting position through coiled tubing, and connect the packer to the pressure control sealing device;

The packer is hydraulically pressurized by the pressure pump on the ground, so that the inner rubber cylinder, the inner metal pipe, the supporting frame, the outer metal pipe and the outer rubber cylinder are sequentially expanded from the inside to the outside, and the outer rubber cylinder is in contact with the casing and squeezed. When the pressure reaches the preset threshold, the pressure control sealing device opens to release the pressure. At this time, the water penetrates the packer, enters the wellbore through the inner rubber barrel, and finally separates from the coiled tubing and the packer. And pull the coiled tubing out of the wellbore.

The separation of the coiled tubing and the packer can be achieved by throwing hands.

The method for setting a packer disclosed in this solution further includes an inspection step for inspecting the tightness of the packer. The specific inspection steps are located before the methods disclosed in the above embodiments.

Specifically, the inspection steps include:

Connect the first end of the packer to the coiled tubing, and the second end of the packer to the pressure control sealing device;

Fill the packer with water through the pressurized pump to check the tightness of the packer.

When the tightness of the packer meets the production requirements, the following steps are performed:

Send the packer to the wellbore setting position through coiled tubing, and connect the packer to the pressure control sealing device;

The packer is hydraulically pressurized by the pressure pump on the ground. When the pressure reaches the preset threshold, the pressure control sealing device is opened to release the pressure. At this time, the water penetrates the packer and finally leaves the coiled tubing and the packer.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A packer, comprising:

an outer rubber cylinder (2);

a first nipple, a second nipple;

the first outer joint and the second outer joint are sleeved on the outer walls of the first inner joint and the second inner joint respectively;

the outer rubber sleeve (2) is sleeved on the outer metal pipe (3), two end parts of the outer metal pipe (3) are respectively connected with the inner walls of the first outer joint and the second outer joint, and the outer rubber sleeve (2) is connected with the outer metal pipe (3) in a vulcanization mode;

the supporting framework (4) can expand and contract along the circumferential direction of the supporting framework, is positioned in the outer metal pipe (3) and is connected with the inner walls of the first outer joint and the second outer joint, the supporting framework (4) is a supporting framework with a plurality of strip-shaped metal sheets, the plurality of strip-shaped metal sheets are uniformly distributed, and the first end and the second end of the supporting framework (4) are respectively connected with the first outer joint and the second outer joint;

the inner rubber cylinder (5) is arranged in the support framework (4), and a central hole which is coaxial with the inner rubber cylinder (5) is formed in the inner rubber cylinder (5);

the inner metal pipe (6) is sleeved on the outer wall of the inner rubber cylinder (5) and is positioned in the support framework (4), the end parts of the inner metal pipe (6) and the inner rubber cylinder (5) can be abutted against the first inner joint and the second inner joint, and the inner rubber cylinder (5) is connected with the inner metal pipe (6) in a vulcanization mode;

the inner metal tube is arranged on the inner rubber tube and can play a role in protecting the inner rubber tube so as to prevent the support framework from rubbing the inner rubber tube when expanding to cause damage to the inner rubber tube, the inner metal tube is fixedly connected with the inner rubber tube, the outer rubber tube is fixedly connected with the outer metal tube, when the packer expands, the support framework moves relative to the inner metal tube and the outer metal tube, but the inner metal tube and the inner rubber tube as well as the outer rubber tube and the outer metal tube expand synchronously, the inner rubber tube is isolated from the support framework through the inner metal tube and the outer rubber tube and the outer metal tube, and the packer is ensured not to be directly contacted with the inner rubber tube and the outer rubber tube in the expansion process, so that the problem that the inner rubber tube and the outer rubber tube are torn due to stress concentration caused by the friction of the support framework of the packer to the inner rubber tube and the outer rubber tube in the prior art is effectively solved, the setting failure rate of the packer is reduced.

2. A packer as claimed in claim 1, characterised in that the supporting framework (4) is welded to the inner walls of the first and second outer joint, respectively.

3. A packer as claimed in claim 1, characterised in that the inner walls of the first and second outer joints are provided with a first annular groove, respectively, the outer metal pipe (3) being located in the first annular groove and being able to abut against the bottom of the first annular groove;

the supporting framework (4) is located in the first annular groove.

4. A packer as claimed in claim 1, characterised in that the outer walls of the first and second nipples are provided with a second annular groove, respectively, in which the inner metal tube (6) and the inner cement sleeve (5) are located and can be brought against the groove bottom of the second annular groove.

5. A packer as claimed in claim 1, characterised in that the thickness of the outer metal tube (3) is greater than the thickness of the inner metal tube (6).

6. A method of manufacturing a packer as claimed in any one of claims 1 to 5, comprising the steps of:

the outer rubber tube (2) is sleeved on the outer metal tube (3);

an inner rubber tube (5) is sleeved on the inner metal tube (6);

the outer rubber cylinder (2) is connected with the outer metal pipe (3), the inner rubber cylinder (5) is connected with the inner metal pipe (6) in a vulcanization mode;

a first end of the supporting framework (4) is connected with a first outer joint;

the inner rubber tube (5) and the inner metal tube (6) which are vulcanized and connected are arranged in the supporting framework (4);

the outer rubber cylinder (2) and the outer metal pipe (3) which are connected in a sleeved mode are arranged on the supporting framework (4) in a sleeved mode;

a second outer joint is connected to the second end of the supporting framework (4);

and a first inner joint and a second inner joint are respectively installed into the first outer joint and the second outer joint, and the vulcanized inner rubber tube (5) and the vulcanized inner metal tube (6) are pressed between the first inner joint and the second inner joint.

7. A method of setting a packer as claimed in any one of claims 1 to 5, characterised by the steps of:

sending the packer to a setting position of a shaft through a coiled tubing, and connecting the packer with a pressure control sealing device;

and hydraulically pressurizing the packer by a pressure pump on the ground, and opening the pressure control sealing device to release pressure when the pressure reaches a preset threshold value, so that the continuous oil pipe is separated from the packer.

8. The method of setting a packer of claim 7, further comprising a step of testing, the step of testing comprising:

connecting a first end of the packer with the coiled tubing, and connecting a second end of the packer with the pressure control sealing device;

and injecting water into the packer through the pressurizing pump, and checking the sealing property of the packer.

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