A sealing pumping integrated rubber ring and downhole tool

Abstract

The present invention relates to the technical field of downhole tools, and specifically to providing a sealing pumping integrated rubber ring and a downhole tool. A sealing pumping integrated rubber ring comprises a sealing body and a pumping body, wherein the sealing body and the pumping body are an integrated structure; the pumping body is an outwardly turnable skirt structure. The present invention sets the sealing body and the pumping body as an integrated structure, and directly installs the integrated rubber ring on the downhole tool. When pumping, the skirt structure is outwardly turned and stressed, thereby increasing the pumping force; after the pumping is completed, the sealing body can be used for the sealing effect between the downhole tool and the wellbore.

Description

Technical Field

[0001] The present invention relates to the technical field of downhole tools, and in particular to a sealing pumping integrated rubber ring and a downhole tool. Background Art

[0002] In the staged fracturing operation of oil and gas wells, low pumping efficiency is usually encountered when pumping bridge plugs. Due to the operation conditions, when a small outer diameter bridge plug is required, the gap between the bridge plug and the downhole casing is too large, and the drilling fluid flow area becomes larger. When pumping the bridge plug, the force pushing the bridge plug is reduced, which affects the speed of pumping the bridge plug, and ultimately increases the time of staged fracturing of oil and gas wells.

[0003] The existing solution to this problem is to add a pumping ring. The existing pumping ring is installed on an adapter. Each time the bridge plug is lowered, the adapter needs to be disassembled and a new pumping ring needs to be installed, which increases the complexity of on-site operations.

[0004] In addition, the pumping ring is installed on the adapter. When the bridge plug is seated and the pipe string is lifted, the resistance of the pipe string is large due to the presence of the pumping ring, the efficiency is low, and there is a risk of cable breakage. Summary of the invention

[0005] The present invention aims to solve one of the problems in the prior art and provides a sealing pumping integrated rubber ring.

[0006] The technical solution is as follows:

[0007] A sealing pumping integrated rubber ring comprises a sealing body and a pumping body, wherein the sealing body and the pumping body are an integrated structure; and the pumping body is an outwardly turnable skirt structure.

[0008] The working principle and beneficial effects of the present invention are as follows: the present invention sets the sealing body and the pumping body as an integrated structure, and directly installs the integrated rubber ring on the downhole tool. When pumping, the skirt structure is turned outward and subjected to force, thereby increasing the pumping force. After the pumping is completed, the sealing body can be used for the sealing effect between the downhole tool and the wellbore.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the slip contact surface on the sealing body used for abutting against and being pressed against the slip assembly is an inclined surface.

[0011] The beneficial effect of adopting the above further solution is that the slip contact surface of the sealing body is an inclined surface, which is used to abut against the slip assembly and press the sealing body, ensuring that the integrated rubber ring will not fall off, thereby improving the reliability of the integrated rubber ring.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the skirt structure is close to the sealing body end as the skirt bottom, and the thickness of the skirt structure gradually increases in the direction of extension toward the skirt bottom.

[0014] The beneficial effect of adopting the above further scheme is: by setting a structure that gradually thickens from top to bottom, when the pumping displacement is low, the thinner top is easy to turn outward, and can turn outward quickly to generate pumping thrust, driving the entire downhole tool to be quickly lowered, thereby achieving the purpose of improving the pumping effect; as the pumping displacement increases, the skirt turns outward step by step, and the pumping thrust generated also increases step by step. During the actual pumping process, it will not cause an instantaneous sudden increase in cable tension, thereby avoiding the risk of the cable being broken; in addition, the thicker structure at the bottom ensures that the skirt structure has sufficient pressure-bearing capacity to achieve a reliable pumping effect.

[0015] Based on the above technical solution, the present invention can also be improved as follows.

[0016] Furthermore, the skirt structure is close to the sealing body end as the skirt bottom, and the skirt structure is a stepped multi-level structure that gradually thickens in the direction extending toward the skirt bottom.

[0017] The beneficial effect of adopting the above further solution is that by setting it into a stepped multi-level structure, the effect of step-by-step opening is better when the pumping displacement is low.

[0018] Based on the above technical solution, the present invention can also be improved as follows.

[0019] Furthermore, it also includes a pressure ring, the skirt structure is close to the sealing body end as the skirt bottom, and the pressure ring is arranged at the position of the skirt bottom; or, the pressure ring is arranged on the circumference of the outer cylindrical surface between the sealing body and the pumping body.

[0020] The beneficial effect of adopting the above further solution is: a compression ring structure is provided, and the compression ring presses the integrated rubber ring against the downhole tool in the radial direction, further ensuring the reliability and stability of the integrated rubber ring during the pumping process.

[0021] Based on the above technical solution, the present invention can also be improved as follows.

[0022] Furthermore, the pressure ring and the pumping body are configured as an integral structure.

[0023] The beneficial effect of adopting the above further solution is to ensure that the integrated rubber ring is more reliable and stable during the pumping process and will not be washed away.

[0024] Based on the above technical solution, the present invention can also be improved as follows.

[0025] Furthermore, the pressure ring is made of a material with high ductility.

[0026] The beneficial effect of adopting the above further scheme is that the compression ring made of high ductility material maintains good integrity during the expansion process of the downhole tool, and at the same time provides support for the pumping body after the setting is completed, and provides auxiliary sealing for the downhole tool, thereby improving the overall sealing effect of the downhole tool.

[0027] Based on the above technical solution, the present invention can also be improved as follows.

[0028] Furthermore, a flange protruding toward the slip assembly is provided on the sealing body at a position for contacting with the slip assembly, and the flange is used to cover a portion of the slip assembly.

[0029] The beneficial effect of adopting the above further solution is: a flange structure is provided, and after setting, part of the slip assembly plays a compressive supporting role on the flange, thereby playing a good auxiliary sealing role.

[0030] Based on the above technical solution, the present invention can also be improved as follows.

[0031] Furthermore, a convex ring structure is provided on the inner surface of the sealing body, and the top end of the convex ring structure is away from the pumping body.

[0032] The beneficial effect of adopting the above-mentioned further scheme is: by providing a groove matching the convex ring structure on the central tube, before the sealing operation, the convex ring structure is located in the groove, and during the pumping process, the convex ring structure is matched and connected with the groove, and the sealing pumping integrated rubber ring will not fall off the central tube, further ensuring the reliability of the pumping; at the same time, during the sealing, the convex ring structure is pressed against the outer wall of the central tube, which increases the thickness of the sealing body and improves the sealing reliability of the sealing body.

[0033] Based on the above technical solution, the present invention can also be improved as follows.

[0034] Furthermore, the plurality of openings are evenly distributed in the circumferential direction of the skirt structure.

[0035] The beneficial effect of adopting the above further solution is that the multiple openings are evenly distributed to ensure that the pumping force of the downhole tool in the circumferential direction is balanced during pumping, and will not cause the downhole tool to deviate.

[0036] The present invention also provides a downhole tool, including a center pipe, a slip assembly and a sealing assembly, wherein the slip assembly and the sealing assembly abut against and are sleeved on the center pipe, the sealing assembly is the above-mentioned sealing pumping integrated rubber ring, and the sealing body abuts against the slip assembly.

[0037] The beneficial effects of the downhole tool of the present invention are: by setting the above-mentioned sealing pumping integrated rubber ring as a sealing component, the slip assembly presses the sealing body onto the central pipe to ensure that the integrated rubber ring will not fall off; when pumping, the pumping body can realize the pumping effect on the downhole tool, and after the pumping is completed, the sealing body can be used for the sealing effect between the downhole tool and the wellbore.

[0038] Based on the above technical solution, the present invention can also be improved as follows.

[0039] Furthermore, the center tube is a tapered center tube, the inner diameter of the sealing pumping integrated rubber ring is set to a tapered hole structure matching it, and the slip assembly is located at the small end of the center tube.

[0040] The beneficial effect of adopting the above further solution is that by setting the central tube as a conical structure, it can be suitable for downhole tools with a single slip structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional structural schematic diagram of a sealing pumping integrated rubber ring embodiment 1 of the present invention;

[0042] Figure 2 This is a view of the first embodiment in one direction;

[0043] Figure 3 is a schematic diagram of the three-dimensional structure of the second embodiment;

[0044] Figure 4 is a cross-sectional view of the third embodiment in one direction;

[0045] Figure 5 is a cross-sectional view of the fourth embodiment in one direction;

[0046] Figure 6 is a cross-sectional view of the fifth embodiment in one direction;

[0047] Figure 7 is a cross-sectional view of embodiment 6 in one direction;

[0048] Figure 8 is a cross-sectional view of embodiment 7 in one direction;

[0049] Fig. 9 is a cross-sectional view of embodiment 8 in one direction;

[0050] Fig.10 It is a three-dimensional structural schematic diagram of a downhole tool embodiment 1.

[0051] Fig.11 This is a first working state diagram of the downhole tool embodiment 1;

[0052] Fig.12is a second working state diagram of the downhole tool embodiment 1;

[0053] Fig.13 is a third working state diagram of the downhole tool embodiment 1;

[0054] Fig.14 This is a first working state diagram of the second embodiment of the downhole tool;

[0055] Fig.15 is a second working state diagram of the downhole tool embodiment 2;

[0056] Fig.16 is a third working state diagram of the downhole tool embodiment 2;

[0057] Fig.17 This is a first working state diagram of the downhole tool embodiment 3;

[0058] Fig.18 is a second working state diagram of the downhole tool embodiment 3;

[0059] Fig.19 is a third working state diagram of the downhole tool embodiment 3;

[0060] Fig. 20 This is a first working state diagram of a fourth embodiment of a downhole tool;

[0061] Fig.21 is a second working state diagram of the fourth embodiment of the downhole tool;

[0062] Fig. 22 is a third working state diagram of the fourth embodiment of the downhole tool;

[0063] Fig.23 is a third working state diagram of the downhole tool embodiment 5;

[0064] Fig.24 is a cross-sectional view of a first embodiment of a skirt structure;

[0065] Fig.25 is a cross-sectional view of a second embodiment of the skirt structure;

[0066] Fig.26 It is a cross-sectional view of the third embodiment of the skirt structure.

[0067] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0068] 1. Sealing body, 11. Slip contact surface, 12. Flange, 13. Convex ring, 2. Pumping body, 21. Skirt structure, 22. Pressure ring, 23. Skirt bottom, 24. Opening, 3. Center pipe, 31. Groove, 4. Slip assembly, 5. Lower joint, 6. Wellbore. DETAILED DESCRIPTION

[0069] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0070] See the structural diagram of the sealing pumping integrated rubber ring example 1 of the present invention. Figure 1 to Figure 2 .

[0071] The sealing pumping integrated rubber ring comprises a sealing body 1 and a pumping body 2, such as Figure 2 As shown, the sealing body 1 is on the right, and the pumping body 2 is on the left. The sealing body 1 and the pumping body 2 are an integrated structure; the abutting surface between the sealing body 1 and the slip assembly 4 is a slip contact surface 11, which is an inclined surface for abutting against the slip assembly 4 and pressing the sealing body 1. The abutting portion between the sealing body 1 and the slip assembly 4 is provided with a flange 12 protruding toward the slip assembly 4; the pumping body 2 is an outwardly turned skirt structure 21. Integrated rubber ring Since the rubber ring has the functions of sealing and pumping, it is generally made of rubber or high-ductility and high-toughness plastic material.

[0072] The end of the skirt structure 21 close to the sealing body 1 is the skirt bottom 23, and the thickness of the skirt structure 21 gradually increases in the direction extending toward the skirt bottom 23. Figure 2 As shown, the outer wall of the skirt structure 21 and the outer wall of the sealing body 1 are in the same plane.

[0073] In this embodiment, the inner diameter of the integrated rubber ring is set to a tapered hole structure, and the small end of the tapered hole structure is located at the end of the sealing body 1.

[0074] The working principle and process of the first embodiment are as follows: the integrated rubber ring is directly installed on the downhole tool. When pumping, the skirt structure 21 is turned outward and stressed. The slip contact surface 11 of the sealing body 1 is an inclined surface, which is used to abut against the slip assembly 4 and press the sealing body 1 tightly to ensure that the integrated rubber ring will not fall off, thereby improving the reliability of the integrated rubber ring. After the pumping is completed, the sealing body 1 can be used for the sealing of the downhole tool and the wellbore 6. By setting a structure that gradually thickens from top to bottom, when the pumping displacement is low, the thinner top is easy to turn outward, and can turn outward quickly to generate pumping thrust, driving the entire downhole tool to be quickly lowered, thereby achieving the purpose of improving the pumping effect; as the pumping displacement increases, the skirt gradually turns outward, the pumping thrust generated also increases step by step, and the pumping effect gradually reaches the best; in addition, the thicker bottom structure ensures that the skirt structure 21 has sufficient pressure-bearing capacity to achieve a reliable pumping effect; at the same time, a flange 12 structure is provided, and after sealing, part of the cava assembly 4 plays a compressive support role on the flange 12, thereby playing a good auxiliary sealing role.

[0075] See the structural diagram of the second embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 3Compared with the first embodiment, the difference is that a pressure ring 22 is provided on the sealing body 1 near the bottom 23 of the skirt. Figure 3 As shown, the pressure ring 22 in this embodiment presses the integrated rubber ring against the downhole tool in the radial direction, further ensuring the reliability and stability of the integrated rubber ring during the pumping process, that is, during the pumping process, the pressure ring 22 always maintains a pressing effect on the pumping body 2, and the entire integrated rubber ring will not be washed away by the pumping pressure.

[0076] See the structural diagram of the third embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 4 Compared with the first embodiment, the difference lies in that a plurality of openings 24 are arranged on the circumference of the skirt structure 21 , and the plurality of openings 24 are evenly distributed on the circumference of the skirt structure 21 .

[0077] The multiple openings 24 set above make it easier for the skirt structure 21 to open at the beginning of pumping, and the effective displacement during pumping is lower; at the same time, when the skirt structure 21 of the pumping body 2 is fully opened, it will not completely seal the gap between the casings, will not cause interception, and the integrated rubber ring will not be easily washed away by the fluid. The multiple openings 24 evenly distributed ensure that the pumping force of the downhole tool in the circumferential direction is balanced during pumping, and will not cause the downhole tool to deviate. The opening 24 in this embodiment is a U-shaped structure. In a specific embodiment, it can be set to a circular structure, etc., and the size of the opening 24 can also be adjusted according to the adaptability of the working conditions.

[0078] See the structural diagram of the fourth embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 5 Compared with the first embodiment, the difference is that the inner surface of the sealing body 1 is provided with a convex ring 13 structure, and the top of the convex ring 13 structure extends toward the slip contact surface 11 of the sealing body 1, that is, Figure 5 The right end shown extends away from the direction of the pumping body 2. By providing the convex ring 13 structure, the convex ring 13 structure is matched and connected with the groove 31 of the center pipe 3. During the pumping process, the sealing pumping integrated rubber ring will not fall off from the center pipe 3, further ensuring the reliability of the pumping; at the same time, when setting the seal, the convex ring 13 structure is pressed against the outer wall of the center pipe 3, increasing the thickness of the sealing body 1 and improving the sealing reliability of the sealing body 1.

[0079] See the structural diagram of the fifth embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 6 Compared with the first embodiment, the difference is that a pressure ring 22 is provided on the sealing body 1 near the bottom 23 of the skirt. Figure 6As shown, the cross section of the pressure ring 22 in this embodiment is circular, and it abuts against the skirt structure 21 at the position of the skirt bottom 23. This structure not only further ensures the reliability and stability of the integrated rubber ring during the pumping process, that is, during the pumping process, the pressure ring 22 always maintains a tight pressure on the pumping body 2, and the entire integrated rubber ring will not be washed away by the pumping pressure. At the same time, after the setting is completed, the pressure ring 22 will support the skirt structure 21, thereby making the skirt structure 21 abut against the inner wall of the wellbore 6 and achieve auxiliary sealing.

[0080] See the structural diagram of the sixth embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 7 Compared with the first embodiment, the difference is that the flange 12 is not provided on the sealing body 1 .

[0081] See the structural diagram of the seventh embodiment of the sealing pumping integrated rubber ring of the present invention. Figure 8 Compared with the first embodiment, the difference lies in that the flange 12 is not provided on the sealing body 1 , and the slip contact surface 11 is a straight surface perpendicular to the axis of the sealing body 1 .

[0082] See the structural diagram of the eighth embodiment of the sealing pumping integrated rubber ring of the present invention. Fig. 9 Compared with the seventh embodiment, the difference is that the bottom 23 of the skirt is not provided with a groove structure; the skirt structure 21 is provided with a plurality of openings 24 in the circumferential direction. At the same time, a pressure ring 22 is provided on the outer cylindrical surface between the sealing body 1 and the pumping body 2. Specifically, the outer cylindrical surface of the pressure ring 22 is not higher than the surface of the sealing body 1.

[0083] In the above seven embodiments, the pressure ring 22 in the sealing pumping integrated rubber ring and the pumping body 2 are set as a separate structure, that is, the pressure ring 22 is installed at the bottom 23 of the skirt. In a specific embodiment, the pressure ring 22 can be vulcanized into one with the sealing pumping integrated rubber ring. The sealing pumping integrated rubber ring is a rubber product. During the vulcanization molding process, the pressure ring 22 is pre-set, and the two are combined into an integrated structure. This integrated rubber ring structure further ensures that the integrated rubber ring is more reliable and stable during the pumping process and will not be washed away.

[0084] In the above-mentioned embodiments 2, 3, 4 and 7, a pressure ring 22 is provided. Under the premise of ensuring the pumping effect, according to the sealing force of the sealing tool, the pressure ring 22 breaks by itself during the sealing process after the pumping is completed. Specifically, the pressure ring 22 can be made of ordinary soluble metal, and then an initial fracture is processed. During the sealing process, during the expansion process of the pressure ring moving from the small end to the large end along the conical surface on the center tube, the pressure ring can easily break from the initial fracture.

[0085] The structural diagram of the downhole tool embodiment 1 of the present invention is shown in FIG. Figures 10 to 13, including a central tube 3, a slip assembly 4, a sealing assembly and a lower joint 5, the slip assembly 4 and the sealing assembly abut against and are sleeved on the central tube 3, the sealing assembly is the sealing pumping integrated rubber ring in the aforementioned embodiment 2, the sealing body 1 abuts against the slip assembly 4 through the slip contact surface 11, the slip contact surface 11 is an inclined surface, and the part of the slip assembly 4 abutting against it is also set as an inclined surface structure, that is, the two inclined surfaces are matched together, and the slip assembly 4 presses the sealing body 1 against the central tube 3. The slip assembly 4 is provided with slip teeth, which are used to anchor with the inner wall of the wellbore 6. The outer diameter of the slip assembly 4 is smaller than the outer diameter of the sealing body 1, and a flange 12 protruding toward the slip assembly 4 is provided at the abutment between the sealing body 1 and the slip assembly 4, and the flange 12 covers part of the slip assembly 4, and the flange 12 extends to the right, and part of the slip assembly 4 is covered by the flange 12. The central tube 3 is a conical central tube 3, the inner diameter of the sealing pumping integrated rubber ring is set to a tapered hole structure matching it, and the slip assembly 4 is located at the small end of the central tube 3. In this embodiment, the slip assembly 4 is a spiral slip, that is, the part contacting the slip surface 11 is a spiral nested structure, and the part of the slip assembly 4 contacting the lower joint is a petal slip, and each petal slip is connected to the spiral structure respectively.

[0086] The first working state of this embodiment is shown in Fig.11 , that is, the state of the downhole tool just being placed in the wellbore 6 and before being pumped. It should be noted that the setting tool for setting the downhole tool is not shown in the figure. The downhole tool is located in the middle of the wellbore 6. Since it is not in the pumping state, the skirt structure 21 of the pumping body 2 in the integrated rubber ring is in a normal state and is not turned outward.

[0087] The second working state of this embodiment 1 is shown in Fig.12 , that is, the downhole tool is in the wellbore 6 and is in the state of being pumped. The flow direction of the pumping liquid is from left to right. Due to the pressure of the pumping liquid, the skirt structure 21 of the pumping body 2 turns outward, and the pumping liquid generates thrust on the entire downhole tool, pushing the downhole tool forward. During the pumping process of the downhole tool, the pressure ring 22 always keeps the pressing effect on the pumping body 2, that is, the pressure ring 22 always presses the pumping body 2 on the central pipe 3, and the integrated rubber ring will not be washed away by the pumping pressure, ensuring reliability.

[0088] The third working state of this embodiment 1 is shown in Fig.13 , that is, the downhole tool is in the wellbore 6, after pumping is completed and the seal is set, after the seal is set, the slip teeth in the slip assembly are anchored to the inner wall of the wellbore 6, and the sealing body 1 in the integrated rubber ring is abutted and sealed against the inner wall of the wellbore 6. In this embodiment, after setting, part of the slip assembly 4 plays a compressive support role on the flange 12, and the flange 12 plays a good auxiliary sealing role.

[0089] The structural diagram of the second embodiment of the downhole tool of the present invention is shown in Figures 14 to 16 , which is different from the first embodiment in that the present embodiment adopts the one-piece rubber ring in the third embodiment, that is, the skirt structure 21 is provided with a plurality of openings 24 in the circumference, and the plurality of openings 24 are evenly distributed in the circumference of the skirt structure 21. The first working state of the second embodiment is shown in FIG. Fig.14 , that is, the state of the downhole tool just being placed in the wellbore 6 and before being pumped. It should be noted that the setting tool for setting the downhole tool is not shown in the figure. The downhole tool is located in the middle of the wellbore 6. Since it is not in the pumping state, the skirt structure 21 of the pumping body 2 in the integrated rubber ring is in a normal state and is not turned outward.

[0090] The second working state of the second embodiment is shown in Fig.15 That is, the downhole tool is in the wellbore 6 and is in a pumping state. The flow direction of the pumping fluid is from left to right. Due to the pressure of the pumping fluid, the skirt structure 21 of the pumping body 2 turns outward, and the pumping fluid generates thrust on the entire downhole tool, pushing the downhole tool forward. The multiple openings 24 set up as above make the skirt structure 21 easier to open at the beginning of pumping, and the effective displacement during pumping is lower; at the same time, when the skirt structure 21 of the pumping body 2 is fully opened, it will not completely seal the gap between the casings, will not cause interception, and the integrated rubber ring is not easily washed away by the fluid. The multiple openings 24 evenly distributed ensure the balance of the pumping force of the downhole tool in the circumferential direction during pumping, and will not cause the displacement of the downhole tool.

[0091] The third working state of the second embodiment is shown in Fig.16 , that is, the downhole tool is in the wellbore 6, after pumping is completed and the seal is set, after the seal is set, the slip teeth in the slip assembly are anchored to the inner wall of the wellbore 6, and the sealing body 1 in the integrated rubber ring is abutted and sealed against the inner wall of the wellbore 6. In this embodiment, after setting, part of the slip assembly 4 plays a compressive support role on the flange 12, and the flange 12 plays a good auxiliary sealing role.

[0092] The structural diagram of the downhole tool embodiment 3 of the present invention is shown in Figures 17 to 19 , the difference from the first embodiment is that the present embodiment adopts the one-piece rubber ring in the fourth embodiment, that is, the inner surface of the sealing body 1 is provided with a convex ring 13 structure, the top of the convex ring 13 structure extends to the slip contact surface 11 of the sealing body 1, and the center pipe 3 is provided with a groove 31 matching the convex ring 13 structure. Before the setting work, the convex ring 13 structure is located in the groove 31. The first working state of the second embodiment is shown in FIG. Fig.17 , that is, the state of the downhole tool just being placed in the wellbore 6 and before pumping. It should be noted that the setting tool for setting the downhole tool is not shown in FIG. The downhole tool is located in the middle of the wellbore 6. Since it is not in the pumping state, the skirt structure 21 of the pumping body 2 in the integrated rubber ring is in a normal state without eversion.

[0093] The second working state of this embodiment 3 is shown in Fig.18 That is, the downhole tool is in the wellbore 6 and is in a pumping state. The flow direction of the pumping liquid is from left to right. Due to the pressure of the pumping liquid, the skirt structure 21 of the pumping body 2 is turned outward, and the pumping liquid generates a thrust on the entire downhole tool, pushing the downhole tool forward; by setting the convex ring 13 structure, during the pumping process, the convex ring 13 structure is matched and connected with the groove 31, and the sealing pumping integrated rubber ring will not fall off the center pipe 3, further ensuring the reliability of the pumping.

[0094] The third working state of the third embodiment is shown in Fig.19 , that is, the downhole tool is in the wellbore 6, and the pumping is completed and the seal is set. After the seal is set, the slip teeth in the slip assembly are anchored to the inner wall of the wellbore 6, and the sealing body 1 in the integrated rubber ring is abutted and sealed against the inner wall of the wellbore 6. In this embodiment, when setting, the convex ring 13 structure is pressed against the outer wall of the central pipe 3, which increases the thickness of the sealing body 1 and improves the sealing reliability of the sealing body 1.

[0095] The structural diagram of the fourth embodiment of the downhole tool of the present invention is shown in Figure 20 to Figure 22 , which is different from the first embodiment in that the present embodiment adopts the one-piece rubber ring in the fifth embodiment, that is, the cross section of the pressure ring 22 in the present embodiment is circular, and abuts against the skirt structure 21 at the position of the skirt bottom 23. The first working state of the fourth embodiment is shown in FIG. Fig. 20 , that is, the state of the downhole tool just being placed in the wellbore 6 and before pumping. It should be noted that the setting tool for setting the downhole tool is not shown in FIG. The downhole tool is located in the middle of the wellbore 6. Since it is not in the pumping state, the skirt structure 21 of the pumping body 2 in the integrated rubber ring is in a normal state without eversion.

[0096] The second working state of this embodiment 4 is shown in Fig.21 That is, the downhole tool is in the wellbore 6 and is in a pumping state. The flow direction of the pumping liquid is from left to right. Due to the pressure of the pumping liquid, the skirt structure 21 of the pumping body 2 turns outward, and the pumping liquid generates a thrust on the entire downhole tool, pushing the downhole tool forward; during the pumping process of the downhole tool, the pressure ring 22 always maintains a pressing effect on the pumping body 2, that is, the pressure ring 22 always presses the pumping body 2 against the center pipe 3, and the integrated rubber ring will not be washed away by the pumping pressure, ensuring reliability.

[0097] The third working state of the fourth embodiment is shown in Fig. 22, that is, the downhole tool is in the wellbore 6, and the pumping is completed and the seal is set. After the seal is set, the slip teeth in the slip assembly are anchored to the inner wall of the wellbore 6, and the sealing body 1 in the integrated rubber ring is abutted and sealed against the inner wall of the wellbore 6. In this embodiment, after the seal is set, the pressure ring 22 will support the skirt structure 21, thereby making the skirt structure 21 abut against the inner wall of the wellbore 6 and achieve auxiliary sealing.

[0098] The third working state of the fifth embodiment is shown in Fig.23 This embodiment adopts the integrated rubber ring in the integrated rubber ring embodiment 6, that is, the flange 12 is not set on the sealing body 1. The downhole tool is in the wellbore 6, and after the pumping is completed and the sealing is completed, the slip assembly directly presses the slip contact surface 11.

[0099] The cross-sectional view of the first embodiment of the skirt structure 21 is shown in Fig.24 The skirt is set to a structure with multiple tapers, that is, at the top of the skirt, the taper is smaller and the skirt is thinner; near the bottom 23 of the skirt, the taper is larger and the skirt is thicker, forming a structure in which the thickness gradually increases from the edge position of the skirt to the extension direction of the bottom 23 of the skirt.

[0100] The cross-sectional view of the second embodiment of the skirt structure 21 is shown in Fig.25 ,and Fig. 20 In contrast, the tapers in the skirt structure 21 are the same, except that steps are provided between adjacent tapers, i.e., a stepped multi-stage structure is formed as a whole. This has a better effect of opening step by step when the pumping displacement is low.

[0101] The cross-sectional view of the third embodiment of the skirt structure 21 is shown in Fig.26 ,and Fig.25 In comparison, there is no tapered structure and each step is a cylindrical structure.

[0102] In this embodiment, the inner diameter of the integrated rubber ring is a tapered hole. In a specific embodiment, it can be matched to a cylindrical hole to match the cylindrical center tube 3 according to actual use.

[0103] It should be noted that the arrangement of the skirt structure in the integrated rubber ring structure, the structure of the pressure ring, etc. in the embodiment provided by the present invention can be arbitrarily combined according to the requirements of actual use conditions.

[0104] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing pumping integrated rubber ring, characterized in that it includes a sealing body and a pumping body, the sealing body and the pumping body are an integrated structure; the pumping body is an outwardly turned skirt structure.

2. A sealing pumping integrated rubber ring according to claim 1, characterized in that: The slip contact surface on the sealing body used for abutting against and being pressed against the slip assembly is an inclined surface.

3. The sealing pumping integrated rubber ring according to claim 1, characterized in that: The skirt structure is close to the sealing body end as the skirt bottom, and the thickness of the skirt structure gradually increases in the direction of extending toward the skirt bottom.

4. The sealing pumping integrated rubber ring according to claim 1, characterized in that: The skirt structure is close to the end of the sealing body as the skirt bottom, and the skirt structure is a stepped multi-level structure that gradually thickens in the direction extending toward the skirt bottom.

5. The sealing pumping integrated rubber ring according to claim 1, characterized in that: It also includes a pressure ring, the skirt structure is close to the sealing body end as the skirt bottom, and the pressure ring is arranged at the position of the skirt bottom; or, the pressure ring is arranged on the circumference of the outer cylindrical surface between the sealing body and the pumping body.

6. A sealing pumping integrated rubber ring according to claim 5, characterized in that: The pressure ring and the pumping body are arranged as an integral structure.

7. The sealing pumping integrated rubber ring according to claim 5, characterized in that: The pressure ring is made of a material with high ductility.

8. A sealing pumping integrated rubber ring according to any one of claims 1 to 7, characterized in that: A flange protruding toward the slip assembly is provided on the sealing body at a position for contacting with the slip assembly, and the flange is used for covering a portion of the slip assembly.

9. A sealing pumping integrated rubber ring according to any one of claims 1 to 7, characterized in that: A convex ring structure is disposed on the inner surface of the sealing body, and the top end of the convex ring structure is away from the pumping body.

10. A sealing pumping integrated rubber ring according to any one of claims 1 to 7, characterized in that: The skirt structure is provided with a plurality of openings on the circumference thereof, and the plurality of openings are evenly distributed on the circumference of the skirt structure.

11. A downhole tool, comprising a central tube, a slip assembly and a sealing assembly, wherein the slip assembly and the sealing assembly abut against and are sleeved on the central tube, characterized in that: The sealing component is a sealing pumping integrated rubber ring as described in any one of claims 1 to 10, and the sealing body abuts against the slip component.

12. A downhole tool according to claim 11, characterized in that: The central tube is a tapered central tube, the inner diameter of the sealing pumping integrated rubber ring is set to a tapered hole structure matching the central tube, and the slip assembly is located at the small end of the central tube.

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