A dissolvable cartridge packer

Abstract

This utility model discloses a soluble glue cartridge packer, including a central tube, the upper and lower ends of which are detachably connected to an upper connector and a lower connector, respectively. An upper support, an upper seal, an intermediate connector, an upper glue cartridge seat, a glue cartridge, a lower glue cartridge seat, and a lower seal are sequentially fitted onto the central tube between the upper and lower connectors. A through hole penetrating the side wall of the central tube is provided, and the upper seal is fitted onto the central tube corresponding to the through hole. The left and right ends of the upper seal are threadedly connected to the upper support and the intermediate connector, respectively. The upper seal can seal the fluid passage between the through hole and the upper support. A pressure ring and a spring are also fitted onto the central tube corresponding to the intermediate connector, and the pressure ring and spring can seal or open the fluid passage between the upper seal and the intermediate connector. The intermediate connector, upper glue cartridge seat, glue cartridge, lower glue cartridge seat, and lower seal are sequentially detachably connected. This utility model has a simple structure, is lightweight, simplifies the operation process, and reduces costs and the risk of stuck drills.

Description

Technical Field

[0001] This utility model relates to the field of downhole tool technology, and in particular to a soluble packer. Background Technology

[0002] In oil and gas field development, especially in low-permeability, tight oil and gas reservoirs, to increase oil and gas production, it is often necessary to perform staged fracturing operations on different sections of vertical, directional, or horizontal wellbores. This requires the use of packers to achieve inter-layer isolation and prevent interference between fluids and pressures between layers. Solvent-filled packers are one of the important tools to meet this need. However, existing solvent-filled packers have the following problems: 1. Due to its heavy weight and large size, the probability of friction with the casing increases significantly in complex wellbore trajectories, which can easily lead to jamming problems and cause inconvenience to downhole operations.

[0003] 2. The locking mechanism mainly uses a conical locking mechanism. However, the complex conical locking mechanism not only increases the manufacturing cost, but also increases the difficulty of later maintenance and repair, which is not conducive to reducing the overall operating cost.

[0004] Therefore, there is an urgent need for a new type of soluble gel packer. Utility Model Content

[0005] To address the aforementioned problems, this utility model aims to provide a soluble tube packer.

[0006] The technical solution of this utility model is as follows: A soluble tube packer includes a central tube, the upper and lower ends of which are detachably connected to an upper connector and a lower connector, respectively. The upper bearing, upper seal, intermediate joint, upper rubber sleeve seat, rubber sleeve, lower rubber sleeve seat, and lower seal are sequentially sleeved on the central tube between the upper joint and the lower joint. The central tube has a through hole penetrating the side wall of the central tube. The upper seal is sleeved on the central tube corresponding to the through hole. The left and right ends of the upper seal are threadedly connected to the upper bearing and the intermediate joint, respectively. The upper seal can seal the fluid passage between the through hole and the upper bearing. The intermediate joint is also fitted with a connected pressure ring and spring on the central tube. The pressure ring can seal the fluid passage between the upper seal and the intermediate joint, and can move to the right with the spring to open the fluid passage between the upper seal and the intermediate joint when the spring is compressed. The intermediate joint, upper rubber sleeve seat, rubber sleeve, lower rubber sleeve seat, and lower seal are detachably connected in sequence.

[0007] Preferably, the upper seal includes a connected cylindrical section one and a cylindrical section two. The outer diameter of the cylindrical section one is larger than the outer diameter of the cylindrical section two. The inner wall of the cylindrical section one is provided with an internal thread section one at its left end, and a groove one is provided on the right side of the internal thread section one. A sealing ring one is provided in the groove one. The outer wall of the cylindrical section two is provided with an external thread section one at its right end.

[0008] Preferably, a groove 2 is provided on the cylindrical section 2 on the left side of the external thread section 1, and a sealing ring 2 is provided in the groove 2.

[0009] Preferably, the intermediate joint includes a connected cylindrical section three and a cylindrical section four. The outer diameter of the cylindrical section three is larger than the outer diameter of the cylindrical section four. The inner wall of the cylindrical section three is provided with an internal thread section two at the left end, and the outer wall of the cylindrical section four is provided with an external thread section two at the right end. The pressure ring and the spring are sleeved on the corresponding central tube of the cylindrical section three.

[0010] Preferably, the cylindrical section four on the left side of the external thread section two is provided with a groove three, and a sealing ring three is provided in the groove three.

[0011] Preferably, the upper adhesive sleeve seat includes cylindrical section five, cylindrical section six, cylindrical section seven, and cylindrical section eight; The inner diameters of cylindrical section five and cylindrical section eight are the same, and the inner diameters of cylindrical section six and cylindrical section seven are the same but smaller than the inner diameter of cylindrical section five; the outer diameters of cylindrical section five, cylindrical section six, and cylindrical section eight are the same, and the outer diameter of cylindrical section seven is smaller than the inner diameter of cylindrical section eight. The inner wall of the fifth cylindrical section is provided with an internal thread section three at the right end, and the left end of the sixth cylindrical section is connected to the right end of the fifth cylindrical section. The cylindrical section seven and the cylindrical section eight are coaxially arranged, and the length of the cylindrical section seven is less than the length of the cylindrical section eight. The left ends of the cylindrical section seven and the cylindrical section eight are connected to the right end of the cylindrical section six, and the left end of the rubber tube is sleeved on the cylindrical section seven.

[0012] Preferably, the lower glue tube seat has the same structure as the upper glue tube seat, and the right end of the glue tube is sleeved on the cylindrical section seven of the lower glue tube seat.

[0013] Preferably, the lower seal includes a connected cylindrical section nine and a cylindrical section ten. The outer diameter of the cylindrical section nine is smaller than the outer diameter of the cylindrical section ten. The outer wall of the cylindrical section nine is provided with an external thread section three at its left end. The external thread section three is provided with a groove four on its right side. A sealing ring four is provided in the groove four. The inner wall of the cylindrical section ten is provided with a groove five at its right end. A sealing ring five is provided in the groove five.

[0014] Preferably, the lower seal further includes a frustum section, the end of which has a larger outer diameter is connected to the right end of the cylindrical section.

[0015] The beneficial effects of this utility model are: This invention has a simple structure and is lightweight, which can simplify the operation process and reduce costs and the risk of drill jamming. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of the soluble adhesive cartridge packer of this utility model; Figure 2 This is a schematic diagram of the overall perspective structure of the soluble adhesive tube packer of this utility model; Figure 3 This is a perspective view of the sealing structure of the soluble adhesive tube packer of this utility model; Figure 4 This is a perspective structural diagram of the intermediate joint of the soluble adhesive tube packer of this utility model; Figure 5 This is a perspective structural diagram of the glue cartridge seat on the soluble glue cartridge packer of this utility model; Figure 6 This is a perspective structural schematic diagram of the lower seal of the soluble adhesive tube packer of this utility model; Figure 7 This is a schematic diagram of the pressure ring and spring of the soluble adhesive tube packer of this utility model; Figure 8 This is a schematic diagram of the structure of the soluble adhesive packer of this utility model.

[0018] Numbering in the diagram: 1-Upper connector, 2-Upper load-bearing, 3-Upper seal, 301-Cylindrical section one, 302-Cylindrical section two, 303-Internal thread section one, 304-Groove one, 305-External thread section one, 306-Groove two, 4-Intermediate connector, 401-Cylindrical section three, 402-Cylindrical section four, 403-Internal thread section two, 404-External thread section two, 405-Groove three, 5-Pressure ring, 6-Spring, 7-Upper rubber sleeve Seat, 701-Cylindrical Section 5, 702-Cylindrical Section 6, 703-Cylindrical Section 7, 704-Cylindrical Section 8, 705-Internal Thread Section 3, 8-Rubber Sleeve, 9-Lower Rubber Sleeve Seat, 10-Lower Seal, 1001-Cylindrical Section 9, 1002-Cylindrical Section 10, 1003-External Thread Section 3, 1004-Groove 4, 1005-Groove 5, 1006-Frustum Section, 11-Central Tube, 12-Lower Connector, 13-Through Hole. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and technical features described in this application can be combined with each other. It should also be pointed out that, unless otherwise indicated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms "comprising" or "including" and similar words used in this utility model refer to elements or objects preceding the word that encompass the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0020] like Figure 1-8 As shown, this utility model provides a soluble tube packer, including a central tube 11, the upper and lower ends of which are detachably connected to an upper connector 1 and a lower connector 12, respectively. The upper bearing 2, upper seal 3, intermediate joint 4, upper rubber sleeve seat 7, rubber sleeve 8, lower rubber sleeve seat 9, and lower seal 10 are sequentially sleeved on the central tube 11 between the upper joint 1 and the lower joint 12. The central tube 11 is provided with a through hole 13 that penetrates the side wall of the central tube 11. The upper seal 3 is sleeved on the central tube 11 corresponding to the through hole 13. The left and right ends of the upper seal 3 are threadedly connected to the upper support 2 and the intermediate joint 4, respectively. The upper seal 3 can seal the fluid channel between the through hole 13 and the upper support 2. The intermediate joint 4 is also fitted with a connected pressure ring 5 and a spring 6 on the central tube 11. The pressure ring 5 can seal the fluid channel between the upper seal 3 and the intermediate joint 4, and can move to the right with the spring 6 to open the fluid channel between the upper seal 3 and the intermediate joint 4 when the spring 6 is compressed. The intermediate joint 4, upper glue tube seat 7, glue tube 8, lower glue tube seat 9, and lower seal 10 are sequentially detachably connected.

[0021] In one specific embodiment, the upper seal 3 includes a connected cylindrical section 301 and a cylindrical section 302. The outer diameter of the cylindrical section 301 is larger than the outer diameter of the cylindrical section 302. The inner wall of the cylindrical section 301 has an internal thread section 303 on the left end and a groove 304 on the right side. A sealing ring (not shown in the figure) is provided in the groove 304. The outer wall of the cylindrical section 302 has an external thread section 305 on the right end.

[0022] In the above embodiment, the fluid channel between the through hole 13 and the upper support 2 can be sealed by the sealing ring to prevent fluid from entering the upper support 2.

[0023] To enhance the sealing performance between the intermediate joint 4 and the upper seal 3, optionally, a groove 306 is provided on the cylindrical section 302 on the left side of the external thread section 305, and a sealing ring (not shown in the figure) is provided in the groove 306.

[0024] In one specific embodiment, the intermediate joint 4 includes connected cylindrical section three 401 and cylindrical section four 402. The outer diameter of cylindrical section three 401 is larger than the outer diameter of cylindrical section four 402. The inner wall of cylindrical section three 401 is provided with internal thread section two 403 at the left end, and the outer wall of cylindrical section four 402 is provided with external thread section two 404 at the right end. The pressure ring 5 and the spring 6 are sleeved on the central tube 11 corresponding to cylindrical section three 401.

[0025] To enhance the sealing performance between the intermediate joint 4 and the upper rubber sleeve seat 7, optionally, a groove 405 is provided on the cylindrical section 402 on the left side of the external thread section 404, and a sealing ring 3 (not shown in the figure) is provided in the groove 405.

[0026] In one specific embodiment, the glue-filling sleeve seat 7 includes cylindrical section five 701, cylindrical section six 702, cylindrical section seven 703, and cylindrical section eight 704; The inner diameters of cylindrical segment 5 701 and cylindrical segment 8 704 are the same, and the inner diameters of cylindrical segment 6 702 and cylindrical segment 703 are the same and smaller than the inner diameter of cylindrical segment 5 701; the outer diameters of cylindrical segment 5 701, cylindrical segment 6 702, and cylindrical segment 8 704 are the same, and the outer diameter of cylindrical segment 703 is smaller than the inner diameter of cylindrical segment 8 704; The inner wall of the fifth cylindrical section 701 is provided with an internal thread section 705 at the right end, and the left end of the sixth cylindrical section 702 is connected to the right end of the fifth cylindrical section 701. The cylindrical segment 703 and the cylindrical segment 8 704 are coaxially arranged, and the length of the cylindrical segment 703 is less than the length of the cylindrical segment 8 704. The left ends of the cylindrical segment 703 and the cylindrical segment 8 704 are connected to the right end of the cylindrical segment 6 702. The left end of the rubber tube 8 is sleeved on the cylindrical segment 703.

[0027] In one specific embodiment, the lower glue tube seat 9 has the same structure as the upper glue tube seat 7, and the right end of the glue tube 8 is sleeved on the cylindrical section 7 of the lower glue tube seat 9.

[0028] In one specific embodiment, the lower seal 10 includes a connected cylindrical section nine 1001 and a cylindrical section ten 1002. The outer diameter of the cylindrical section nine 1001 is smaller than the outer diameter of the cylindrical section ten 1002. The outer wall of the cylindrical section nine 1001 is provided with an external thread section three 1003 at its left end. The external thread section three 1003 is provided with a groove four 1004 on its right side. A sealing ring four (not shown in the figure) is provided in the groove four 1004. The inner wall of the cylindrical section ten 1002 is provided with a groove five 1005 at its right end. A sealing ring five (not shown in the figure) is provided in the groove five 1005.

[0029] In one specific embodiment, the lower seal 10 further includes a frustum section 1006, the end of which has a larger outer diameter is connected to the right end of the cylindrical section 1002.

[0030] It should be noted that the central tube 11, upper connector 1, upper bearing 2, and lower connector 12 are all existing technologies, and their specific structures will not be described in detail here.

[0031] When using this invention, the lower rubber sleeve seat 9, lower seal 10, central tube 11, and lower connector 12 are sheared and anchored to the inner wall of the sleeve. Liquid is pressurized, and the liquid enters the upper seal 3 and intermediate connector 4 through the through hole 13 on the central tube 11. The liquid pressure pushes the pressure ring 5 and spring 6 downwards to transmit pressure, allowing the liquid to flow smoothly into the cavity of the rubber sleeve 8. Continuous liquid pressurization causes the rubber sleeve to expand radially and adhere to the sleeve wall. When the rubber sleeve is in full contact with the inner wall of the sleeve, the internal pressure reaches its limit, and the sealing is completed.

[0032] In this invention, a locking mechanism is formed using a pressure ring 5 and a spring 6, which reduces the overall weight of the structure, lowers manufacturing costs, and reduces the difficulty of later maintenance and repair, thus helping to reduce overall operating costs. Furthermore, by using a soluble material to manufacture the soluble adhesive packer described in this invention, it can be dissolved, eliminating the need for a recovery process and avoiding the risks associated with recovery difficulties and the impact of downhole residues on subsequent operations.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A soluble cartridge packer, characterized in that, Includes a central tube, the upper and lower ends of which are detachably connected to an upper connector and a lower connector, respectively; The upper bearing, upper seal, intermediate joint, upper rubber sleeve seat, rubber sleeve, lower rubber sleeve seat, and lower seal are sequentially sleeved on the central tube between the upper joint and the lower joint. The central tube has a through hole penetrating the side wall of the central tube. The upper seal is sleeved on the central tube corresponding to the through hole. The left and right ends of the upper seal are threadedly connected to the upper bearing and the intermediate joint, respectively. The upper seal can seal the fluid passage between the through hole and the upper bearing. The intermediate joint is also fitted with a connected pressure ring and spring on the central tube. The pressure ring can seal the fluid passage between the upper seal and the intermediate joint, and can move to the right with the spring to open the fluid passage between the upper seal and the intermediate joint when the spring is compressed. The intermediate joint, upper rubber sleeve seat, rubber sleeve, lower rubber sleeve seat, and lower seal are detachably connected in sequence.

2. The soluble adhesive cartridge packer according to claim 1, characterized in that, The upper seal includes a connected cylindrical section one and a cylindrical section two. The outer diameter of the cylindrical section one is larger than the outer diameter of the cylindrical section two. The inner wall of the cylindrical section one is provided with an internal thread section one on the left end, and a groove one on the right side of the internal thread section one. A sealing ring one is provided in the groove one. The outer wall of the cylindrical section two is provided with an external thread section one on the right end.

3. The soluble adhesive cartridge packer according to claim 2, characterized in that, A groove 2 is provided on the cylindrical section 2 on the left side of the external thread section 1, and a sealing ring 2 is provided in the groove 2.

4. The soluble adhesive cartridge packer according to claim 2 or 3, characterized in that, The intermediate joint includes two connected cylindrical sections, a third and a fourth. The outer diameter of the third cylindrical section is larger than that of the fourth cylindrical section. The left end of the inner wall of the third cylindrical section is provided with an internal thread section, and the right end of the outer wall of the fourth cylindrical section is provided with an external thread section. The pressure ring and the spring are sleeved on the corresponding central tube of the third cylindrical section.

5. The soluble adhesive cartridge packer according to claim 4, characterized in that, The cylindrical section four on the left side of the external thread section two is provided with a groove three, and a sealing ring three is provided in the groove three.

6. The soluble adhesive cartridge packer according to claim 4, characterized in that, The upper adhesive sleeve seat includes cylindrical section five, cylindrical section six, cylindrical section seven, and cylindrical section eight; The inner diameters of cylindrical section five and cylindrical section eight are the same, and the inner diameters of cylindrical section six and cylindrical section seven are the same but smaller than the inner diameter of cylindrical section five; the outer diameters of cylindrical section five, cylindrical section six, and cylindrical section eight are the same, and the outer diameter of cylindrical section seven is smaller than the inner diameter of cylindrical section eight. The inner wall of the fifth cylindrical section is provided with an internal thread section three at the right end, and the left end of the sixth cylindrical section is connected to the right end of the fifth cylindrical section. The cylindrical section seven and the cylindrical section eight are coaxially arranged, and the length of the cylindrical section seven is less than the length of the cylindrical section eight. The left ends of the cylindrical section seven and the cylindrical section eight are connected to the right end of the cylindrical section six, and the left end of the rubber tube is sleeved on the cylindrical section seven.

7. The soluble adhesive cartridge packer according to claim 6, characterized in that, The lower glue tube seat has the same structure as the upper glue tube seat, and the right end of the glue tube is sleeved on the cylindrical section seven of the lower glue tube seat.

8. The soluble adhesive cartridge packer according to claim 7, characterized in that, The lower seal includes a connected cylindrical section nine and a cylindrical section ten. The outer diameter of the cylindrical section nine is smaller than the outer diameter of the cylindrical section ten. The outer wall of the cylindrical section nine is provided with an external thread section three at the left end. The external thread section three is provided with a groove four on the right side. A sealing ring four is provided in the groove four. The inner wall of the cylindrical section ten is provided with a groove five at the right end. A sealing ring five is provided in the groove five.

9. The soluble adhesive cartridge packer according to claim 8, characterized in that, The lower seal also includes a frustum section, the larger end of which is connected to the right end of the cylindrical section.

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