阅读说明：本技术 一种封隔器、封隔器的加工方法以及封隔器的坐封方法 (Packer, packer machining method and packer setting method ) 是由 咸玉席 卢德唐 于 2020-07-13 设计创作，主要内容包括：本发明公开了一种封隔器、封隔器的加工方法以及封隔器的坐封方法,其中封隔器的内胶筒上设置有内金属管,内金属管能够对内胶筒起到保护作用,防止支撑骨架膨胀时与内胶筒之间发生摩擦,而且内金属管与内胶筒固定连接,外胶筒与外金属管固定连接,封隔器膨胀时,支撑骨架相对于内金属管和外金属管发生相对位移,但是内金属管与内胶筒以及外胶筒与外金属管之间同步扩张,且内胶筒通过内金属管、外胶筒通过外金属管实现与支撑骨架之间的隔离,保证封隔器在膨胀过程中不会直接与内胶筒和外胶筒接触,从而有效克服了现有技术中封隔器的支撑骨架对内胶筒和外胶筒的摩擦造成内胶筒和外胶筒由于应力集中而发生撕裂的难题,降低了封隔器的坐封失败率。(The invention discloses a packer, a packer processing method and a packer setting method, wherein an inner metal pipe is arranged on an inner rubber barrel of the packer, the inner metal pipe can protect the inner rubber barrel and prevent friction between a support framework and the inner rubber barrel when the support framework expands, the inner metal pipe is fixedly connected with the inner rubber barrel, an outer rubber barrel is fixedly connected with the outer metal pipe, the support framework is relatively displaced relative to the inner metal pipe and the outer metal pipe when the packer expands, but the inner metal pipe and the inner rubber barrel as well as the outer rubber barrel and the outer metal pipe synchronously expand, the inner rubber barrel is isolated from the support framework through the inner metal pipe and the outer rubber barrel and is ensured not to be directly contacted with the inner rubber barrel and the outer rubber barrel in the expansion process, thereby effectively overcoming the problem that the inner rubber barrel and the outer rubber barrel are torn due to stress concentration caused by the friction between the inner rubber barrel and the outer rubber barrel of the support framework of the packer in the prior art, the setting failure rate of the packer is reduced.)

1. A packer, comprising:

an outer rubber cylinder (2);

an inner joint (7);

the outer joint (1) is sleeved on the outer wall of the inner joint (7);

the outer rubber cylinder (2) is sleeved on the outer metal pipe (3), and the end part of the outer metal pipe (3) is connected with the inner wall of the outer joint (1);

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 wall of the outer joint (1);

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 supporting framework (4), and the end parts of the inner metal pipe (6) and the inner rubber cylinder (5) can be abutted against the inner joint (7).

2. A packer as claimed in claim 1, characterised in that the inner rubber sleeve (5) is vulcanised in connection with the inner metal tube (6).

3. A packer as claimed in claim 1, characterised in that the outer packing element (2) is vulcanised to the outer metal tube (3).

4. A packer as claimed in claim 1, characterised in that the supporting framework (4) is welded to the inner wall of the outer joint (1).

5. A packer as claimed in claim 1, characterised in that the inner wall of the outer joint (1) is provided with a first annular groove, in which the outer metal tube (3) is located and can be abutted against the bottom of the groove;

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

6. A packer as claimed in claim 1, characterised in that the outer wall of the inner joint (7) is provided with a second annular groove in which the inner metal tube (6) and the inner cement sleeve (5) are located and against the groove bottom of which the groove is possible.

7. 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).

8. A method for machining a packer is characterized by comprising the following steps:

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;

the first end of the supporting framework (4) is connected with a first external joint (1);

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 (1) is connected to the second end of the supporting framework (4);

a first inner joint (7) and a second outer joint (1) are respectively installed into the first outer joint (1) and the second outer joint (1), and the vulcanized inner rubber sleeve (5) and the vulcanized inner metal pipe (6) are pressed between the first inner joint (7) and the second inner joint (7).

9. A setting method of a packer is characterized by comprising the following steps:

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.

10. The method of setting a packer of claim 9, further comprising a step of verifying, the step of verifying 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.

Technical Field

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

Background

In the downhole construction and completion process of oil development and well completion, the packer is an important downhole tool in the aspects of fracturing, water injection, water plugging, channeling checking, well completion and the like, and plays a role in setting control by outwards expanding an annular space between an isolation oil pipe and a casing pipe through a rubber sleeve, so that gas or liquid is allowed to pass through a central channel, and the flow of fluid is controlled.

Disclosure of Invention

In view of this, the invention provides a packer to prevent an inner rubber cylinder and an outer rubber cylinder from being torn in a setting process of the packer, and reduce the setting failure rate of the packer. The invention also provides a packer machining method and a packer setting method.

In order to achieve the purpose, the invention provides the following technical scheme:

a packer, comprising:

an outer rubber cylinder;

an inner joint;

the outer joint is sleeved on the outer wall of the inner joint;

the outer rubber cylinder is sleeved on the outer metal pipe, and the end part of the outer metal pipe is connected with the inner wall of the outer joint;

the supporting framework can expand and contract along the circumferential direction of the supporting framework, is positioned in the outer metal pipe and is connected with the inner wall of the outer joint;

the inner rubber cylinder is arranged in the support framework, and a central hole which is coaxially arranged with the inner rubber cylinder is formed in the inner rubber cylinder;

the inner metal pipe is sleeved on the outer wall of the inner rubber cylinder and is positioned in the supporting framework, and the end parts of the inner metal pipe and the inner rubber cylinder can abut against the inner joint.

Preferably, in the packer, the inner rubber sleeve is connected with the inner metal pipe in a vulcanization mode.

Preferably, in the packer, the outer rubber sleeve is connected with the outer metal pipe in a vulcanization mode.

Preferably, in the packer, the supporting framework is welded to an inner wall of the outer joint.

Preferably, in the packer, a first annular groove is formed in an inner wall of the outer joint, and the outer metal pipe is located in the first annular groove and can abut against a groove bottom of the first annular groove;

the support framework is located in the first annular groove.

Preferably, in the above packer, the outer wall of the inner joint is provided with a second annular groove, and the inner metal pipe and the inner rubber sleeve are located in the second annular groove and can abut against the groove bottom of the second annular groove.

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

The scheme discloses a packer machining method, which comprises the following steps:

an outer rubber cylinder is sleeved on the outer metal pipe;

the inner rubber cylinder is sleeved on the inner metal pipe;

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

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

the inner rubber cylinder and the inner metal pipe which are vulcanized and connected are arranged in the supporting framework;

the outer rubber cylinder and the outer metal pipe which are connected in a vulcanization mode are sleeved on the supporting framework;

connecting a second outer joint to a second end of the support framework;

and the first inner joint and the second outer joint are respectively installed into the first outer joint and the second outer joint, and the vulcanized inner rubber tube and the vulcanized inner metal tube are pressed between the first inner joint and the second inner joint.

The scheme discloses a setting method of a packer, which comprises the following steps:

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.

Preferably, in the setting method of the packer, the method further comprises a checking step, wherein the checking step comprises:

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.

According to the technical scheme, the inner metal pipe is arranged on the inner rubber cylinder and can protect the inner rubber cylinder to prevent the inner rubber cylinder from being damaged due to friction between the inner metal pipe and the inner rubber cylinder when the supporting framework expands, the outer rubber cylinder is fixedly connected with the outer metal pipe, the supporting framework is relatively displaced relative to the inner metal pipe and the outer metal pipe when the packer expands, but the inner metal pipe and the inner rubber cylinder as well as the outer rubber cylinder and the outer metal pipe synchronously expand, the inner rubber cylinder is isolated from the supporting framework through the outer metal pipe and the inner metal pipe, the packer is ensured not to be directly contacted with the inner rubber cylinder and the outer rubber cylinder in the expansion process, and the problem that the inner rubber cylinder and the outer rubber cylinder are torn due to stress concentration due to the friction between the inner rubber cylinder and the outer rubber cylinder by the supporting framework of the packer in the prior art is effectively overcome, the setting failure rate of the packer is reduced.

The invention also discloses a processing method of the packer, which is used for manufacturing the packer. Because the packer has the technical effects, the packer manufactured by the packer machining method also has the same technical effects, and the details are not repeated herein.

The invention also discloses a setting method of the packer, which is used for installing the packer. Because the packer has the technical effects, the packer installed by the setting method of the packer also has the same technical effects, and the details are not repeated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

Wherein the content of the first and second substances,

1. the outer joint 2, the outer rubber tube 3, the outer metal tube 4, the supporting framework 5, the inner rubber tube 6, the inner metal tube 7 and the inner joint.

Detailed Description

The invention discloses a packer, which aims to prevent an inner rubber cylinder and an outer rubber cylinder from being torn in the setting process of the packer and reduce the setting failure rate of the packer. The invention also discloses a packer machining method and a packer setting method.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses a packer, please refer to fig. 1.

The packer disclosed by the scheme comprises an outer rubber sleeve 2, an outer metal pipe 3, an inner joint 7, an outer joint 1, a supporting framework 4, an inner rubber sleeve 5 and an inner metal pipe 6.

Wherein, outer joint 1 cover is established on nipple 7, and the inner wall of outer joint 1 contacts with the outer wall of nipple 7, and outer joint 1 is used for being connected with support chassis 4 and outer tubular metal resonator 3, and the both ends of interior packing element 5 are provided with nipple 7, compress tightly interior packing element 5 between two nipples 7.

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

The outer metal tube 3 is sleeved on the inner rubber tube 5. In a particular embodiment of the solution, the length of the outer metal tube 3 is at least equal to the length of the inner glue cylinder 5. The inner rubber cylinder 5 is provided with a central hole which is coaxial with the inner rubber cylinder 5 and used for liquid or medium to pass through.

The whole that outer metal tube 3 and outer packing element 2 are constituteed is located outside support chassis 4, and outer metal tube 3 cover is established on support chassis 4, and the whole that interior metal tube 6 and interior packing element 5 are constituteed is located support chassis 4, and the outer wall of interior metal tube 6 and the inner wall contact of support chassis 4.

In a specific embodiment of the scheme, 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 same displacement and no cracking occur at the connection interfaces of the outer rubber tube 2 and the outer metal tube 3 and the connection interfaces of the inner metal tube 6 and the inner rubber tube 5 in the expansion process.

The supporting framework 4 is a supporting framework 4 with a plurality of strip-shaped metal sheets, the strip-shaped metal sheets are uniformly distributed, and the first end and the second end of the supporting framework 4 are both connected with the outer joint 1. It should be noted here that the first end of the supporting framework 4 is opposite to the second end of the supporting framework 4, specifically, two free ends of the supporting framework 4. The supporting framework 4 can expand and contract along the circumferential direction. In this scheme, the width between the adjacent strip sheetmetals is required not to be too big, avoids support chassis 4 can not take place bending deformation. Furthermore, the supporting skeleton is deformed by the internal pressure, which cannot be completely restored.

In a specific embodiment of the present disclosure, the number of the outer joints 1 is two, and the outer joints are respectively located at two ends of the supporting framework 4, the number of the inner joints 7 is also two, and the inner joints 7 are respectively located at two ends of the inner rubber tube 5, the inner joints 7 are located in the outer joint 1, and the inner joints 7 are connected to the outer joint 1.

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

The specific assembling process is as one specific embodiment of this scheme, 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, then the combination of the outer rubber tube 2 and the outer metal tube 3 and the combination of the inner metal tube 6 and the inner rubber tube 5 are vulcanized respectively, the connection of the outer rubber tube 2 and the outer metal tube 3 and the fixed connection of the inner metal tube 6 and the inner rubber tube 5 are realized, then, the first end of the supporting framework 4 is connected with an outer joint 1, then, lubricating oil is coated on the inner wall of the outer metal tube 3, the second end of the combination of the outer rubber tube 2 and the outer metal tube 3 self-supporting framework 4 is sleeved on the supporting framework 4, then, lubricating oil is coated on the outer wall of the inner metal tube 6, the second end of the combination of the inner metal tube 6 and the inner rubber tube 5 self-supporting framework 4 is loaded into the supporting framework 4, then, the second end of the supporting framework 4 is connected with the outer joint 1, and finally, matching the inner joint 7 with the outer joint 1, and pressing the combination of the inner metal pipe 6 and the inner rubber sleeve 5 between the two inner joints 7.

Lubricating oil between the supporting framework 4 and the combination of the inner metal tube 6 and the inner rubber cylinder 5 and lubricating oil between the supporting framework 4 and the combination of the outer rubber cylinder 2 and the outer metal tube 3 play a role in lubricating, and damage to the inner metal tube 6 and the outer metal tube 3 is further reduced.

In this scheme, outer packing element 2 can adopt the mode of vulcanizing and connecting with outer tubular metal resonator 3, also can adopt other connected modes, guarantees that outer packing element 2 does not take place relative motion with outer tubular metal resonator 3 in the inflation process, and specifically adopts which kind of connected mode, selects according to actual need by the technical personnel in the field.

The outer rubber cylinder 2 and the outer metal pipe 3 as well as the inner metal pipe 6 and the inner rubber cylinder 5 are connected in a vulcanization mode, so that the outer rubber cylinder 2 and the inner rubber cylinder 5 have a hydrogen sulfide corrosion resistance function, and have a high expansion rate of which the expansion rate is increased by 4 times.

In this scheme, interior metal pipe 6 can adopt the mode of vulcanizing the connection with interior packing element 5, also can adopt other connected modes, guarantees interior metal pipe 6 and interior packing element 5 not take place relative motion in the inflation process, and specifically adopts which kind of connected mode, selects according to actual need by the technical staff in this field.

In one embodiment of the present invention, the outer joint 1 is connected to the inner joint 7 by a screw connection. The outer joint 1 and the inner joint 7 are preferably detachably connected, and the connection mode of the outer joint 1 and the inner joint 7 is not limited to a threaded connection mode, and other detachable connection modes can be selected.

In one embodiment of the present disclosure, the supporting frame 4 is welded to the outer joint 1. The supporting framework 4 and the outer joint 1 preferably adopt a fixed connection mode, are not limited to a welding connection mode, can also adopt other connection modes, and even can adopt a detachable connection mode, and are not specifically limited herein.

The packer disclosed by the scheme is characterized in that the inner metal tube 6 is arranged on the inner rubber tube 5, the inner metal tube 6 can play a role in protecting the inner rubber tube 5, friction between the inner metal tube 5 and the supporting framework 4 during expansion is prevented, the inner rubber tube 5 is damaged, the inner metal tube 6 is fixedly connected with the inner rubber tube 5, the outer rubber tube 2 is fixedly connected with the outer metal tube 3, the supporting framework 4 generates relative displacement relative to the inner metal tube 6 and the outer metal tube 3 during expansion of the packer, but the inner metal tube 6 and the inner rubber tube 5 as well as the outer rubber tube 2 and the outer metal tube 3 are synchronously expanded, the inner rubber tube 5 is isolated from the supporting framework 4 through the inner metal tube 6 and the outer rubber tube 2 through the outer metal tube 3, the packer is ensured not to be directly contacted with the inner rubber tube 5 and the outer rubber tube 2 during expansion, and therefore the problem that the inner rubber tube 5 and the outer rubber tube 2 are caused by the friction between the inner rubber tube 5 and the outer rubber tube 2 due to stress concentration caused by the supporting framework 4 of the packer in the prior art is effectively overcome The difficult problem of tearing is solved, and the setting failure rate of the packer is reduced.

The packer is sent to the setting position of the shaft through a coiled tubing, and the packer is connected with a pressure control sealing device;

the packer is hydraulically pressurized by a pressure pump on the ground, so that the inner rubber sleeve, the inner metal pipe, the supporting framework, the outer metal pipe and the outer rubber sleeve sequentially expand from inside to outside, the outer rubber sleeve is in contact with and extrudes the casing pipe to play a role in setting, when the pressure reaches a preset threshold value, the pressure control sealing device is opened to release the pressure, water penetrates through the packer, penetrates through the inner rubber sleeve to enter the shaft, finally, the coiled tubing and the packer are separated, and the coiled tubing is lifted out of the shaft.

The packer disclosed by the scheme is not easy to tear and damage, and the service life of the packer is prolonged.

In a specific embodiment of the scheme, the supporting framework 4 is directly welded and connected with the outer joint 1;

in another embodiment of the present disclosure, a first annular groove is formed on an inner wall of the outer joint 1, the supporting frame 4 is located in the first annular groove, and the first annular groove provides an installation space for the supporting 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 supporting framework 4 is greater than that of the outer metal tube 3, the groove wall of the first annular groove is a step-shaped groove wall, one step surface of the step-shaped groove wall is connected with the supporting framework 4, the supporting framework 4 can abut against the step surface, the other step surface of the step-shaped 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 sleeve 5 are located in the second annular groove, and the end portions of the inner metal tube 6 and the inner rubber sleeve 5 can be abutted against the groove bottom of the second annular groove.

The compression of the inner joint 7 against the combination of the inner metal tube 6 and the inner rubber sleeve 5 can also be achieved by means of the end face of the inner joint 7, in which embodiment no second annular groove needs to be provided.

The scheme needs to reserve a chamfer at the contact part of the inner joint 7 and the inner metal pipe 6 to prevent the outer metal pipe 3 from generating large bending curvature in the expansion process.

Preferably, the first annular groove and the second annular groove are arranged when leaving a factory, so that the assembly difficulty of the packer is reduced.

In the scheme, the thickness of the outer metal pipe 3 is larger than that of the inner metal pipe 6, so that the outer metal pipe 3 is prevented from cracking after the packer is expanded. The thickness of the outer metal tube 3 is designed according to the requirement of capacity expansion, and is not specifically limited herein.

The scheme also discloses a packer processing method, which comprises the following steps:

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

the inner rubber tube 5 is sleeved on the inner metal tube 6;

the outer rubber cylinder 2 and the outer metal pipe 3, the inner rubber cylinder 5 and the inner metal pipe 6 are connected in a vulcanization mode;

the first end of the supporting framework 4 is connected with a first outer joint 1;

the inner rubber cylinder 5 and the inner metal pipe 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 vulcanization mode are sleeved on the supporting framework 4;

a second outer joint 1 is connected to a second end of the supporting framework 4;

the first inner joint 7 and the second outer joint 1 are respectively installed into the first outer joint 1 and the second outer joint 1, and the vulcanized inner rubber sleeve 5 and the vulcanized inner metal pipe 6 are pressed between the first inner joint 7 and the second inner joint 7.

The outer rubber cylinder 2 and the outer metal pipe 3 as well as the inner metal pipe 6 and the inner rubber cylinder 5 are connected in a vulcanization mode, so that the outer rubber cylinder 2 and the inner rubber cylinder 5 have a hydrogen sulfide corrosion resistance function, and have a high expansion rate of which the expansion rate is increased by 4 times.

The mode that interior metal pipe 6 and interior packing element 5 and outer packing element 2 and outer metal pipe 3 adopt the vulcanization to be connected guarantees that interior metal pipe 6 and interior packing element 5 and outer packing element 2 and outer metal pipe 3 do not take place relative motion at the inflation in-process, and synchronous expansion between interior metal pipe 6 and interior packing element 5 and outer packing element 2 and the outer metal pipe 3 avoids packer rubber tube 5 and outer packing element 2 to take place to tear in the inflation in-process.

Moreover, the inner rubber cylinder 5 is isolated from the supporting framework 4 through the inner metal pipe 6 and the outer rubber cylinder 2 through the outer metal pipe 3, the packer is guaranteed not to be directly contacted with the inner rubber cylinder 5 and the outer rubber cylinder 2 in the expansion process, the difficult problem that the inner rubber cylinder 5 and the outer rubber cylinder 2 are torn due to stress concentration is effectively solved, and the setting failure rate of the packer is reduced.

Before the combination of the outer rubber sleeve 2 and the outer metal pipe 3 is matched with the supporting framework 4, lubricating oil can be smeared on the outer wall of the supporting framework 4, and before the combination of the inner rubber sleeve 5 and the inner metal pipe 6 is matched with the supporting framework 4, lubricating oil can be smeared on the outer wall of the inner metal pipe 6, so that the lubricating effect is achieved, and the damage to the inner metal pipe 6 and the outer metal pipe 3 is further reduced.

The scheme also discloses a setting method of the packer, which comprises the following steps:

the packer is sent to the setting position of the shaft through a coiled tubing, and the packer is connected with a pressure control sealing device;

the packer is hydraulically pressurized by a pressure pump on the ground, so that the inner rubber sleeve, the inner metal pipe, the supporting framework, the outer metal pipe and the outer rubber sleeve sequentially expand from inside to outside, the outer rubber sleeve is in contact with and extrudes the casing pipe to play a role in setting, when the pressure reaches a preset threshold value, the pressure control sealing device is opened to release the pressure, water penetrates through the packer, penetrates through the inner rubber sleeve to enter the shaft, finally, the coiled tubing and the packer are separated, and the coiled tubing is lifted out of the shaft.

The separation of the coiled tubing from the packer may be accomplished by a release.

The setting method of the packer disclosed by the scheme further comprises a testing step for testing the sealing performance of the packer. The specific test steps precede the method disclosed in the above example.

Specifically, the checking step comprises:

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 a pressurizing pump, and checking the sealing property of the packer.

When the sealing performance of the packer meets the production requirement, the following steps are carried out:

the packer is sent to the setting position of the shaft through a coiled tubing, and the packer is connected with a pressure control sealing device;

the packer is hydraulically pressurized by a pressure pump on the ground, when the pressure reaches a preset threshold value, the pressure control sealing device is opened to release the pressure, and at the moment, water penetrates through the packer and finally breaks away from the continuous oil pipe and the packer.

The previous description of the disclosed embodiments is provided to enable 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 applied to 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.