Transfer layer plugging bridge plug

Abstract

The utility model relates to the technical field of oil and gas field development, and provides a transfer layer plugging bridge plug which comprises a mandrel, a locking ring, a locking ring sleeve, an anchoring system, a sealing assembly, a sliding valve and a guide shoe. The mandrel comprises a first mandrel body and a second mandrel body, the second mandrel body is connected to the bottom end of the first mandrel body in a sealed mode, and the first mandrel body and the second mandrel body are provided with communicated inner cavities. The locking ring, the locking ring sleeve, the anchoring system and the sealing assembly are connected to the first mandrel in a sleeving mode. The guide shoe is arranged at the bottom end of the second mandrel in a sleeving manner; and the slide valve is arranged in the second core shaft and can move in the inner cavity of the second core shaft under the action of external force so as to connect or disconnect the inner cavity and the stratum channel. According to the technical scheme, operation such as plugging and cement squeezing can be carried out under the high-temperature and high-pressure well condition. The setting of the bridge plug can be completed by one pipe column, and related operations such as non-well-killing trip-out can be realized after setting.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field development, in particular to a layer-transfer plugging bridge plug. Background Art

[0002] At present, there are many specifications for traditional layer-transfer plugging bridge plugs. However, the pressure ratings of traditional layer-transfer plugging bridge plugs are all within 50 - 70 MPa, and the temperature ratings are all within 120 °C. They can meet the requirements for applications in ordinary reservoirs with low temperature and pressure requirements, but they cannot meet the application requirements in high-temperature and high-pressure reservoirs (the tool pressure rating requirement reaches 105 MPa, and the temperature rating reaches 204 °C), and operations such as plugging and cement squeezing cannot be carried out. Content of the Utility Model

[0003] The purpose of the utility model is to solve at least one technical problem in the background art and provide a layer-transfer plugging bridge plug.

[0004] To achieve the above purpose, the utility model provides a layer-transfer plugging bridge plug, which includes: a mandrel, a locking ring, a locking ring sleeve, an anchoring system, a sealing assembly, a sliding valve, and a guide shoe;

[0005] The mandrel includes a first mandrel and a second mandrel. The second mandrel is hermetically connected to the bottom end of the first mandrel, and the first mandrel and the second mandrel have a communicating inner cavity.

[0006] The locking ring, the locking ring sleeve, the anchoring system, and the sealing assembly are sleeved on the first mandrel.

[0007] The guide shoe is sleeved on the bottom end of the second mandrel.

[0008] The sliding valve is arranged in the second mandrel and can move in the inner cavity of the second mandrel under the action of an external force to communicate the inner cavity and the formation channel.

[0009] According to one aspect of the utility model, it further includes: a bushing, which is sleeved on the first mandrel, is arranged adjacent to the locking ring, is located inside one end of the locking ring sleeve, and the outer wall is connected to the locking ring sleeve through shear screws.

[0010] According to one aspect of the utility model, it further includes: a shear ring, and the shear ring is installed at one end of the first mandrel close to the locking ring sleeve through shear pins.

[0011] According to one aspect of the utility model, the anchoring system includes: a first anchoring assembly and a second anchoring assembly, and the first anchoring assembly and the second anchoring assembly are symmetrically arranged at both ends of the sealing assembly;

[0012] When the anchoring system is subjected to a thrust or a tensile force, the first anchoring component and the second anchoring component move in one direction.

[0013] According to one aspect of the present invention, the first anchoring component includes: a first slip and a first cone;

[0014] One end of the first slip away from the lock ring sleeve is provided with a first tapered hole that expands outward in the direction of the sealing component, and the first cone is partially inserted into the first tapered hole;

[0015] The first cone is connected to the mandrel through a shear pin;

[0016] The second anchoring component includes: a second slip and a second cone;

[0017] One end of the second slip close to the lock ring sleeve is provided with a second tapered hole that expands outward in the direction of the sealing component, and the second cone is partially inserted into the second tapered hole;

[0018] The second cone is connected to the mandrel through a shear pin.

[0019] According to one aspect of the present invention, the sealing component includes: a first support ring, a first protection ring, a first anti-extrusion ring, a first rubber barrel support ring, a first end rubber barrel, an intermediate rubber barrel, a second end rubber barrel, a second rubber barrel support ring, a second anti-extrusion ring, a second protection ring, and a second support ring arranged in sequence along the direction from the first anchoring component to the second anchoring component;

[0020] The inner walls of the first protection ring and the second protection ring facing the intermediate rubber barrel are provided with a first tapered surface that expands outward in the direction of the intermediate rubber barrel;

[0021] The outer walls of the first rubber barrel support ring and the second rubber barrel support ring facing away from the intermediate rubber barrel are respectively provided with a second tapered surface that is in mating connection with the corresponding first tapered surface.

[0022] According to one aspect of the present invention, the second mandrel is sleeved and fixed at the bottom end of the first mandrel through a set screw and a keyway connection sleeve, and the first mandrel and the second mandrel are hermetically connected through a sealing back ring and an O-ring.

[0023] According to one aspect of the present invention, the outer wall of the slide valve and the inner wall of the inner cavity of the second mandrel are hermetically connected through a sealing back ring and an O-ring.

[0024] According to one aspect of the present invention, the guide shoe is sleeved at the bottom end of the second mandrel through a set screw, and the guide shoe and the second mandrel are hermetically connected through a sealing back ring and an O-ring.

[0025] According to the solution of the present utility model, the second mandrel remains stationary. By pressing down the setting tool to push the setting sleeve, the shear screw is cut, and the locking ring sleeve is pushed downward. Subsequently, the second slip is opened, and the second slip bites into the casing wall. The first slip continues to move downward to squeeze the rubber barrel. The rubber barrel is blocked due to being squeezed, thus blocking the casing channel, that is, blocking the formation gas and liquid, and other operations can be carried out. When it is necessary to open the communication channel between the lower part of the bridge plug and the formation, by lowering the mechanical switch tool and applying a certain downward pressure after it reaches the position, the slide valve can be opened, and the communication channel between the lower part of the bridge plug and the formation can be opened to carry out other operations such as squeezing cement.

[0026] According to the above solution of the present utility model, the present utility model can be used to carry out operations such as plugging and squeezing cement under high-temperature and high-pressure well conditions. The setting of the bridge plug of the present utility model can be completed with one trip of the pipe string, and related operations such as tripping out of the well without killing the well can be realized after setting.

[0027] According to the above solution of the present utility model, the present utility model adopts a multi-segment mandrel structure. Due to the process of squeezing cement, a large flow rate is required, that is, a large internal diameter. The bridge plug also needs to withstand a pressure difference of 105 MPa. Combining with the bridge plug structure, a multi-segment mandrel is used to achieve this function. Segmenting can reduce the processing cost of materials and improve the precision requirements of the mandrel, including requirements for dimensional accuracy, shape accuracy, position accuracy, etc.; it is also convenient for manufacturing process treatment. For example, processes such as surface spraying do not require extremely long related containers. The most important thing is that it is convenient for installation, can reduce the installation difficulty, and save installation time. Brief Description of the Drawings

[0028] Figure 1 Schematically shows a cross-sectional view of the structural arrangement of a layer-transition plugging bridge plug according to an embodiment of the present utility model. Detailed Embodiment

[0029] Now the content of the present utility model will be described with reference to exemplary embodiments. It should be understood that the described embodiments are only for enabling those of ordinary skill in the art to better understand and thus implement the content of the present utility model, rather than implying any limitation to the scope of the present utility model.

[0030] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "an embodiment" and "one embodiment" are to be construed as "at least one embodiment".

[0031] Figure 1 Schematically shows a cross-sectional view of the structural arrangement of a layer-transition plugging bridge plug according to an embodiment of the present utility model. As Figure 1 shown, in this embodiment, the layer-transition plugging bridge plug includes: a mandrel 1, a locking ring 2, a locking ring sleeve 3, an anchoring system, a sealing assembly, a slide valve 4, and a guide shoe 5;

[0032] The mandrel 1 includes a first mandrel 6 and a second mandrel 7. The second mandrel 7 is hermetically connected to the bottom end of the first mandrel 6. The first mandrel 6 and the second mandrel 7 have a communicating inner cavity 8.

[0033] The locking ring 2, the locking ring sleeve 3, the anchoring system and the sealing assembly are sleeved on the first mandrel 6.

[0034] The guide shoe 5 is sleeved on the bottom end of the second mandrel 7.

[0035] The sliding valve 4 is arranged inside the second mandrel 7 and can move in the inner cavity of the second mandrel 7 under the action of an external force to connect or disconnect the passage between the inner cavity 8 and the formation.

[0036] Further, as Figure 1 shown, in this embodiment, the layer-transition plugging bridge plug of the present utility model further includes: a make-up core sleeve 9, which is sleeved on the first mandrel 6, is arranged adjacent to the locking ring 2, is located inside one end of the locking ring sleeve 3, and its outer wall is connected to the locking ring sleeve 3 by a shear screw 10.

[0037] Further, as Figure 1 shown, in this embodiment, the layer-transition plugging bridge plug of the present utility model further includes: a shear ring 11, and the shear ring 11 is installed at one end of the first mandrel 6 close to the locking ring sleeve 3 through a shear pin 12.

[0038] Further, as Figure 1 shown, in this embodiment, the anchoring system includes: a first anchoring component 13 and a second anchoring component 14, and the first anchoring component 13 and the second anchoring component 14 are symmetrically arranged at both ends of the sealing assembly;

[0039] When the anchoring system is subjected to a thrust or a tensile force, the first anchoring component 13 and the second anchoring component 14 move in one direction.

[0040] Further, as Figure 1 shown, in this embodiment, the first anchoring component 13 includes: a first slip 15 and a first cone 16;

[0041] One end of the first slip 15 away from the locking ring sleeve 3 is provided with a first tapered hole 17 that expands outward in the direction of the sealing assembly, and a part of the first cone 16 is inserted into the first tapered hole 17;

[0042] The first cone 16 is connected to the first mandrel through a shear pin;

[0043] The second anchoring component 14 includes: a second slip 18 and a second cone 19;

[0044] One end of the second slip 18 close to the lock ring sleeve 3 is provided with a second tapered hole 20 that expands outward in the direction of the sealing assembly, and a part of the second cone 19 is inserted into the second tapered hole 20;

[0045] The second cone 19 is connected to the first mandrel through a shear pin. With the above settings, when the first slip 15 with multiple tapered surfaces is subjected to a thrust force or when the second slip 18 with multiple tapered surfaces is subjected to a pulling force, the entire anchoring system can only move upward or downward unidirectionally. In this way, the sealing assembly can be firmly anchored through the anchoring system, ensuring the position accuracy and sealing performance.

[0046] Furthermore, as Figure 1 shown, in this embodiment, the sealing assembly includes: a first support ring 21, a first protection ring 22, a first anti-extrusion ring 23, a first rubber barrel support ring 24, a first end rubber barrel 25, an intermediate rubber barrel 26, a second end rubber barrel 27, a second rubber barrel support ring 28, a second anti-extrusion ring 29, a second protection ring 30, and a second support ring 31 arranged in sequence along the direction from the first anchoring assembly 13 to the second anchoring assembly 14;

[0047] On the inner walls of the first protection ring 22 and the second protection ring 30 facing the intermediate rubber barrel 26, there are first tapered surfaces 32 that expand outward in the direction of the intermediate rubber barrel 26;

[0048] On the outer walls of the first rubber barrel support ring 24 and the second rubber barrel support ring 28 facing away from the intermediate rubber barrel 26, there are second tapered surfaces 33 that are cooperatively connected with the corresponding first tapered surfaces 32. With such settings, the sealing assembly can be respectively supported and connected to the first anchoring assembly 13 and the second anchoring assembly 14 at both ends through the first support ring 21 and the second support ring 31. Then, when each rubber barrel is set, the protection rings and rubber barrel support rings can assist in sealing the rubber barrel. After the rubber barrel is set, it can withstand the pressure difference between up and down, protect the rubber barrel, and prevent each rubber barrel support ring from deviating from its position through each anti-extrusion ring, ensuring the stability and reliability of each rubber barrel.

[0049] Furthermore, as Figure 1 shown, in this embodiment, the second mandrel 7 is fixedly sleeved on the bottom end of the first mandrel 6 through a set screw 34 and a keyway 35, and the first mandrel 6 and the second mandrel 7 are sealed and connected through a sealing back ring and an O-ring.

[0050] Furthermore, in this embodiment, the outer wall of the sliding valve 4 and the inner wall of the inner cavity of the second mandrel 7 are sealed and connected through a sealing back ring and an O-ring.

[0051] Furthermore, in this embodiment, the guide shoe 5 is sleeved on the bottom end of the second mandrel 7 through a set screw, and the guide shoe 5 and the second mandrel 7 are sealed and connected through a sealing back ring and an O-ring.

[0052] Furthermore, asFigure 1 As shown, when setting the packer, connect the rotating layer plugging bridge plug of the present invention with a matching setting tool, lower it to the designed well depth, and when pressurizing, the setting sleeve pushes the lock ring sleeve 3 downward. The lock ring sleeve 3 pushes the first slip 15 and the first cone 16, and the second slip 18 at the lower end opens, and the teeth bite into the casing wall. Continue to pressurize to further squeeze the rubber barrels (the first-end rubber barrel 25, the middle rubber barrel 26, and the second-end rubber barrel 27). The rubber barrels plug the casing to block the gas and liquid below, and the bridge plug can be set by pressurizing inside the pipe string, and one trip of the pipe string is completed. After setting, the lower part (bottom end) of the bridge plug is not connected to the formation, and related operations such as drilling out without killing the well can be realized. When it is necessary to open the communication channel between the lower part of the bridge plug and the formation, lower a mechanical switch tool, apply a certain downward pressure after reaching the position, and the sliding valve 4 can be opened, and the communication channel between the lower part of the bridge plug and the formation can be opened for other operations such as squeezing cement.

[0053] According to the above solution of the present invention, the second mandrel 7 remains stationary. By pressurizing the setting tool to push the setting sleeve, the shear screw 10 is cut, the lock ring sleeve 3 is pushed downward, and then the second slip opens. The second slip bites into the casing wall, and the first slip continues to move downward to further squeeze the rubber barrels. The rubber barrels are squeezed to block the casing channel, that is, to block the formation gas and liquid, and other operations are carried out. When it is necessary to open the communication channel between the lower part of the bridge plug and the formation, lower a mechanical switch tool, apply a certain downward pressure after reaching the position, and the sliding valve 4 can be opened, and the communication channel between the lower part of the bridge plug and the formation can be opened for other operations such as squeezing cement.

[0054] According to the above solution of the present invention, the present invention can realize operations such as plugging and squeezing cement under high-temperature and high-pressure well conditions. The setting of the bridge plug of the present invention can be completed in one trip of the pipe string, and related operations such as drilling out without killing the well can be realized after setting.

[0055] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. Transfer layer plugging bridge plug, characterized in that, Comprising: A mandrel, a lock ring, a lock ring sleeve, an anchoring system, a sealing assembly, a sliding valve and a guide shoe; The mandrel includes a first mandrel and a second mandrel, the second mandrel is sealingly connected to the bottom end of the first mandrel, and the first mandrel and the second mandrel have a communicating inner cavity; The lock ring, the lock ring sleeve, the anchoring system and the sealing assembly are sleeved on the first mandrel; The guide shoe is sleeved at the bottom end of the second mandrel; The sliding valve is arranged in the second mandrel and can move in the inner cavity of the second mandrel under the action of an external force to communicate or disconnect the inner cavity and the formation channel.

2. The rotating layer plugging bridge plug according to claim 1, characterized in that, Also comprising: A bushing sleeve, sleeved on the first mandrel, arranged adjacent to the lock ring, located inside one end of the lock ring sleeve, and the outer wall is connected to the lock ring sleeve through shear screws.

3. The rotating layer plugging bridge plug according to claim 1, characterized in that Also comprising: A shear ring, the shear ring is installed at one end of the first mandrel close to the lock ring sleeve through a shear pin.

4. The rotating layer plugging bridge plug according to claim 1, characterized in that, The anchoring system includes: a first anchoring component and a second anchoring component, the first anchoring component and the second anchoring component are symmetrically arranged at both ends of the sealing assembly; When the anchoring system is subjected to a thrust or a tensile force, the first anchoring component and the second anchoring component move in one direction.

5. The rotating layer plugging bridge plug according to claim 4, wherein, The first anchoring component includes: a first slip and a first cone; One end of the first slip away from the lock ring sleeve is provided with a first tapered hole that expands outward in the direction of the sealing assembly, and the first cone is partially inserted into the first tapered hole; The first cone is connected to the first mandrel through a shear pin; The second anchoring component includes: a second slip and a second cone; One end of the second slip close to the lock ring sleeve is provided with a second tapered hole that expands outward in the direction of the sealing assembly, and the second cone is partially inserted into the second tapered hole; The second cone is connected to the first mandrel through a shear pin.

6. The rotating-layer plugging bridge plug according to claim 5, characterized in that, The sealing assembly includes: a first support ring, a first protection ring, a first anti-extrusion ring, a first rubber barrel support ring, a first end rubber barrel, an intermediate rubber barrel, a second end rubber barrel, a second rubber barrel support ring, a second anti-extrusion ring, a second protection ring and a second support ring arranged in sequence along the direction from the first anchoring component to the second anchoring component; The inner walls of the first protection ring and the second protection ring facing the intermediate rubber barrel are provided with a first conical surface that expands outward in the direction of the intermediate rubber barrel; The outer walls of the first rubber barrel support ring and the second rubber barrel support ring facing away from the intermediate rubber barrel are respectively provided with a second conical surface that is in mating connection with the corresponding first conical surface.

7. The rotating-layer plugging bridge plug according to claim 1, wherein The second mandrel is fixedly sleeved at the bottom end of the first mandrel through a set screw and a keyway connection sleeve, and the first mandrel and the second mandrel are sealingly connected through a sealing back ring and an O-ring.

8. The rotating layer plugging bridge plug according to claim 1, characterized in that, The outer wall of the sliding valve and the inner wall of the inner cavity of the second mandrel are sealingly connected through a sealing back ring and an O-ring.

9. The layer-turning plugging bridge plug according to any one of claims 1-8, characterized in that, The guide shoe is sleeved at the bottom end of the second mandrel through a set screw, and the guide shoe and the second mandrel are sealingly connected through a sealing back ring and an O-ring.

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