A slip module with a dissolving marker and a dissolvable ball seat

Abstract

The present application relates to a kind of with dissolving marker's slip module, comprising: slip matrix;Fixed ring, which slips matrix is hooped into a circle;Cylindrical marker, which is inlaid into the front of slip matrix;Slip tooth, which is inlaid into the middle of slip matrix;Spherical marker, which is loaded into the tail of slip matrix;And screw, which is screwed into the tail of slip matrix and limits spherical marker position.In addition, the present application relates to a kind of soluble ball seat, including with dissolving marker's slip module as described above, cone, center tube and lower joint.The present application has the advantages of simple structure, reliable anchoring, judging the state of unblocking or dissolving state is convenient and intuitive, etc., which is beneficial to improve construction efficiency and reduce construction cost.

Description

Technical Field

[0001] The present invention generally relates to components for anchoring downhole tools, and more specifically, to a slip module with a dissolvable marker and a dissolvable ball seat comprising the slip module. Background Technology

[0002] Currently used downhole tools do not have dissolution markers. After use, when production is required again, well cleaning operations are usually performed to determine the unsealed or dissolved state of the tool, which affects construction efficiency and increases construction costs. For example, Reference 1 (Fu Yukun. Soluble slips and soluble bridge plugs: China, CN201810321847.8[P], 2018-10-12) mentions that after the bridge plug is sealed, the slip body dissolves, and the adhesive layer and surface coating break under pressure during subsequent well cleaning operations; Reference 2 (Xu Bangcai. Application of Jianghan soluble bridge plugs in Fuling shale gas field[J]. Journal of Jianghan Petroleum Staff University, 2020, 33(4): 15-17) mentions that there is no obstruction or jamming during coiled tubing well cleaning operations, and the bridge plug is completely dissolved.

[0003] Therefore, existing technologies need to be improved. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to solve the problem that the dissolution state cannot be conveniently and intuitively judged after the tool is run into the well, and to provide a slip module with simple structure, reliable anchoring, and convenient and accurate judgment of dissolution state.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] According to one aspect of the present invention, a KaVo module with a dissolution marker is provided, comprising:

[0007] Kava matrix;

[0008] A retaining ring that binds the cam base into a circle;

[0009] A cylindrical marker, which is embedded in the front of the card body;

[0010] The kava tooth is embedded in the middle of the kava base;

[0011] A spherical marker, which is inserted into the tail of the card body; and

[0012] A screw that screws into the tail of the caliper and limits the spherical marker.

[0013] In one embodiment of the present invention, the Kava substrate consists of eight pieces.

[0014] In one embodiment of the invention, the cylindrical marker is inserted into the front of the card body in an interference fit manner.

[0015] In one embodiment of the invention, the cylindrical markers are marked with different colors.

[0016] In one embodiment of the present invention, the locking tooth is inserted into the middle of the locking tooth base in an interference fit manner.

[0017] In one embodiment of the invention, a retaining ring is installed at the front and rear of the cladding body.

[0018] In one embodiment of the present invention, there are multiple spherical markers, each marked with a different code.

[0019] According to another aspect of the present invention, a soluble ball seat is provided, comprising:

[0020] Central tube;

[0021] A slip module with a dissolution marker is fixedly connected to the central tube. The slip module includes:

[0022] Kava matrix;

[0023] A retaining ring that binds the cam base into a circle;

[0024] A cylindrical marker, which is embedded in the front of the card body;

[0025] The kava tooth is embedded in the middle of the kava base;

[0026] A spherical marker, which is inserted into the tail of the card body; and

[0027] A screw that screws into the tail of the spherical marker and limits its position;

[0028] The cone, fixedly connected to the central tube, abuts against and supports the front of the slip module's slip base, and

[0029] The lower connector has a first part and a second part. The first part is fixedly connected to the central tube and abuts against and supports the tail of the slip body of the slip module. The second part abuts against and is connected to the end of the central tube and limits the position of the central tube.

[0030] In one embodiment of the present invention, the Kava substrate consists of eight pieces.

[0031] In one embodiment of the invention, the cylindrical marker is inserted into the front of the card body in an interference fit manner.

[0032] In one embodiment of the invention, the cylindrical markers are marked with different colors.

[0033] In one embodiment of the present invention, the locking tooth is inserted into the middle of the locking tooth base in an interference fit manner.

[0034] In one embodiment of the invention, a retaining ring is installed at the front and rear of the cladding body.

[0035] In one embodiment of the present invention, there are multiple spherical markers, each with a different code.

[0036] In one embodiment of the invention, the cone, the central tube, and the lower connector are all made of a soluble material.

[0037] In one embodiment of the invention, the cone, central tube, lower connector, and slip matrix can be completely dissolved under the influence of bottom hole temperature and well fluid salinity.

[0038] In one embodiment of the invention, the cone expands the slip base during setting so that the retaining ring is ruptured by the slip base.

[0039] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0040] This invention changes the way tools are verified by well cleaning and other operations to determine their unsealed or dissolved state. It allows for a more intuitive and accurate determination of the tool's unsealed or dissolved state at a specific depth, improving construction efficiency and reducing construction costs. Attached Figure Description

[0041] Figure 1 A schematic diagram of the structure of the KaVo module with dissolution marker provided by the present invention is shown;

[0042] Figure 2 A schematic diagram of the soluble ball seat provided by the present invention is shown.

[0043] List of reference numerals

[0044] 1. Fixing ring, 2. Cylindrical marker, 3. Vault base, 4. Vault tooth, 5. Spherical marker, 6. Screw, 31. Front part, 32. Middle part, 33. Tail part, 7. Cone, 8. Central tube, 9. Vault module with dissolving marker, 10. Lower connector, 101. First part, 102. Second part. Detailed Implementation

[0045] It should be understood that the embodiments of the invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this invention, those skilled in the art will readily recognize that various modifications are possible without substantially departing from the teachings of the invention. Accordingly, all such modifications should be included within the scope of the invention. Other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the invention.

[0046] like Figure 1 As shown, Figure 1 The present invention illustrates a swivel module 9 with a dissolving marker, comprising: a swivel base 3; a retaining ring 1 that binds the swivel base 3 into a circle; a cylindrical marker 2 that is inserted into the front portion 31 of the swivel base 3 with an interference fit; a swivel tooth 4 that is inserted into the middle portion 32 of the swivel base 3 with an interference fit; a spherical marker 5 that is inserted into the tail portion 33 of the swivel base 3; and a screw 6 that is screwed into the tail portion 33 of the swivel base 3 and limits the spherical marker 5.

[0047] This invention has the advantages of simple structure, reliable anchoring, and convenient and intuitive judgment of unsealing or dissolving status, which helps to improve construction efficiency and reduce construction costs.

[0048] In the above structure, preferably, the card substrate 3 consists of eight pieces.

[0049] In the above structure, the cylindrical marker 2 is marked with different colors. The different colors on the cylindrical marker 2 can indicate different depths in the well, which is convenient for later determination of the specific depth of the unsealed or dissolved state.

[0050] In the above structure, the fixing ring 1 is installed at the front 31 and the rear 33 of the card base 3.

[0051] In the above structure, there are multiple spherical markers 5, preferably, for example... Figure 1 The three spherical markers mentioned above each have a different code. By using the different codes marked on the spherical markers, the degree of unsealing or dissolution can be determined later.

[0052] like Figure 2As shown, the present invention provides a soluble ball seat, mainly composed of a cone 7, a central tube 8, a slip module 9 with a dissolution marker, and a lower connector 10. The slip module 9 is fixedly connected to the central tube 8 and includes: a slip base 3; a fixing ring 1 that binds the slip base 3 in a circle; a cylindrical marker 2 that is interference-fitted into the front part 31 of the slip base 3; slip teeth 4 that are interference-fitted into the middle part 32 of the slip base 3; a spherical marker 5 that is inserted into the tail part 33 of the slip base 3; and a screw 6 that is screwed into the tail part 33 of the slip base 3 and limits the position of the spherical marker 5. The cone 7 is fixedly connected to the central tube 8, and the cone 7 abuts against and supports the front part 31 of the slip base 3 of the slip module 9. The lower connector 10 has a first part 101 and a second part 102. The first part 101 is fixedly connected to the central tube 8 and abuts against and supports the tail 33 of the slip base 3 of the slip module 9. The second part 102 abuts against and is connected to the end of the central tube 8 and limits the position of the central tube 8.

[0053] In the above structure, preferably, the card substrate 3 consists of eight pieces.

[0054] In the above structure, the cylindrical marker 2 is marked with different colors. The different colors of the cylindrical marker 2 can indicate different depths in the well, which is convenient for later determination of the specific depth of the unsealed or dissolved state.

[0055] In the above structure, the fixing ring 1 is installed at the front 31 and the rear 33 of the card base 3.

[0056] In the above structure, there are multiple spherical markers 5, each marked with a different code. By using the different codes marked on the spherical markers 5, the degree of unsealing or dissolution can be determined later.

[0057] In the above structure, the cone 7, the central tube 8, and the lower connector 10 are all made of soluble material.

[0058] In the above structure, the cone 7, the central tube 8, the lower connector 10, and the slip matrix 3 can be completely dissolved under the influence of bottom hole temperature and well fluid salinity.

[0059] In the above structure, the cone 7 expands the slip base 3 during setting so that the fixing ring 1 is broken by the slip base 3.

[0060] When the soluble ball seat of the above structure is used in the field, it will be installed at the designed depth in the well. During the setting process, the fixing ring 1 is broken by the slip base 3, and the slip module 9 is anchored to the casing (not shown). Under the influence of bottom hole temperature and well fluid salinity, after the cone 7, central tube 8, lower connector 10, and slip base 3 are completely dissolved, the cylindrical marker 2 and the spherical marker 5 will fall off from the slip base 3 into the casing. During production, the cylindrical marker 2 and the spherical marker 5 rely on their own buoyancy or are transported to the wellhead with the backflow and production fluid, and are captured by the catcher. According to the color of the marking on the cylindrical marker 2 and the code of the spherical marker 5, the unsealing or dissolution state of the soluble ball seat at a specific depth can be intuitively and accurately determined.

[0061] Therefore, this invention changes the way of verifying the unsealed or dissolved state of tools by well cleaning and other operations. This invention can intuitively and accurately determine the unsealed or dissolved state of tools at a specific depth, thereby improving construction efficiency and reducing construction costs.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications or equivalent substitutions made to the present invention without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present invention.

Claims

1. A soluble ball seat, characterized in that, include: Central tube; A colander module with a dissolution marker, the colander module being fixedly connected to the central tube, the colander module comprising: Kava matrix; A retaining ring is used to bind the clasp base into a circle; A cylindrical marker, wherein the cylindrical marker is inserted into the front part of the card substrate in an interference fit manner; The locator tooth is embedded in the middle of the locator base; A spherical marker, said spherical marker being inserted into the tail of the card substrate; and A screw, which is screwed into the tail of the spherical marker and limits its position; A cone, fixedly connected to the central tube, abutting against and supporting the front of the slip base of the slip module, and The lower connector has a first part and a second part. The first part is fixedly connected to the central tube and abuts against and supports the tail of the slip module's slip body. The second part abuts against and is connected to the end of the central tube and limits the positioning of the central tube. The cone, the central tube, and the lower connector are all made of soluble material.

2. The soluble ball seat according to claim 1, characterized in that, The Kava substrate consists of eight pieces.

3. The soluble ball seat according to claim 1, characterized in that, The cylindrical markers are marked with different colors.

4. The soluble ball seat according to claim 1, characterized in that, The locking tooth is inserted into the middle of the locking tooth base in an interference fit manner.

5. The soluble ball seat according to claim 1, characterized in that, The retaining rings are installed at the front and rear of the cladding body.

6. The soluble ball seat according to claim 1, characterized in that, There are multiple spherical markers, and each spherical marker has a different code.

7. The soluble ball seat according to claim 1, characterized in that, The cone, the central tube, the lower connector, and the slip matrix can be completely dissolved under the influence of bottom hole temperature and well fluid salinity.

8. The soluble ball seat according to claim 1, characterized in that, The cone expands the slip base during setting so that the retaining ring is broken by the slip base.

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