Hydraulic control type intelligent fracturing sliding sleeve repeated opening and closing tool

Abstract

The utility model relates to the field of oil exploitation, in particular to a hydraulic control type intelligent fracturing sliding sleeve repeated opening and closing tool which comprises a fracturing sliding sleeve and an opening and closing tool body capable of passing through or being clamped in a sliding sleeve valve element in the fracturing sliding sleeve, and the opening and closing tool body comprises a center pipe and an upper connector fixedly connected to the end of the center pipe. The upper connector is fixedly connected with a slip bowl, the slip bowl is connected with a plurality of slips in a sliding mode, the other end of the center pipe is fixedly connected with a liquid passing cavity, and the liquid passing cavity is connected with an expansion component capable of pushing the plurality of slips to expand outwards in a sliding mode. The function of an intelligent key can be achieved, the target end sliding sleeve is accurately and repeatedly opened or closed, and the problems that a traditional tool and the target end sliding sleeve are not accurate in opening, large in operation difficulty and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction, and more specifically to a hydraulically controlled intelligent fracturing sleeve repetitive switching tool. Background Technology

[0002] In oil extraction, fracturing technology is a key technology for improving well production and extraction efficiency. Through continuous technological innovation and optimization, it will play an increasingly important role in oil extraction. In recent years, sliding sleeve fracturing technology has been widely used, and it can now achieve full-bore, perforation-free, and arbitrary-sequence fracturing. In specific operations, each fracturing sleeve needs to be repeatedly opened or closed; therefore, an opening tool that can stably and accurately repeat the opening or closing of each fracturing sleeve is needed. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulically controlled intelligent fracturing sleeve repeatable switch tool that can act as a "smart key" to accurately and repeatedly open or close the target end sleeve, solving the problems of inaccurate opening of the target segment sleeve and high operation difficulty of traditional tools.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A hydraulically controlled intelligent fracturing sleeve repetitive switching tool includes a fracturing sleeve and a switching tool that can pass through or be locked in a sleeve valve core within the fracturing sleeve. The switching tool includes a central tube and an upper connector fixedly connected to the end of the central tube. A slip seat is fixedly connected to the upper connector, and multiple slips are slidably connected to the slip seat. The other end of the central tube is fixedly connected to a liquid passage chamber, and an extension component capable of pushing the multiple slips to expand outward is slidably connected to the liquid passage chamber.

[0006] The lower cavity is fixedly connected to the liquid passage chamber. The central tube is connected to the lower cavity. The liquid passage chamber is provided with multiple liquid passage holes that can communicate with the lower cavity. When pressurized liquid is introduced into the central tube, the liquid enters the lower cavity and enters the liquid passage chamber through the multiple liquid passage holes, pushing the expansion component to move laterally.

[0007] A guide head is fixedly connected to the lower cavity, and a communication unit is installed between the guide head and the lower cavity.

[0008] The slip seat is provided with a slip mounting groove, and a mounting boss that is slidably connected to the slip mounting groove is fixedly connected to the slip.

[0009] Limit rings are provided on the outer sides of multiple slips;

[0010] The locking seat is fixedly connected to a limiting boss for limiting the lateral movement of the extension component;

[0011] The extension component is provided with a guide slope that contacts the slip, the slip is provided with a guide block on its side, the extension component is provided with a guide groove, the guide block is slidably connected in the guide groove, and the extension component is provided with a limit ring mounting position for installing the limit ring.

[0012] The expansion component and the multiple latches are hinged together by multiple inclined connecting rods, and a limiting plate that can contact the limiting boss is fixedly connected to the expansion component.

[0013] The outer side of the card is provided with multiple truncated pyramids;

[0014] The upper connector is fixedly connected to the slip seat via threads. A sealing ring I is provided between the slip seat and the upper connector. A sealing ring II is provided between the upper connector and the central tube. A sealing ring III is provided between the slip seat and the central tube. The liquid passage chamber is fixedly connected to the central tube via threads. A sealing ring IV is provided between the liquid passage chamber and the expansion component. A sealing ring V is provided between the expansion component and the central tube. The liquid passage chamber is fixedly connected to the lower cavity via threads. A sealing ring VI is provided between the lower cavity and the liquid passage chamber. A sealing ring VII is provided between the lower cavity and the guide head.

[0015] The beneficial effects of this utility model are as follows:

[0016] After the communication unit determines that the switching tool has moved to the designated position, it can hydraulically push the expansion component to move laterally, thereby driving multiple slips to expand outward, so that the switching tool is locked in the fracturing sleeve, thus completing the locking of the switching tool. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of the connection structure between the sliding sleeve and the switching tool of this utility model;

[0019] Figure 2 This is a schematic diagram of the first embodiment of the switching tool of this utility model;

[0020] Figure 3 This is a cross-sectional view of the first embodiment of the switching tool of this utility model;

[0021] Figure 4 This is a half-sectional view of the first embodiment of the switching tool of this utility model;

[0022] Figure 5 This is a schematic diagram of the upper connector structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the clamp seat structure of this utility model;

[0024] Figure 7 This is a cross-sectional view of the slip seat of this utility model;

[0025] Figure 8 This is a schematic diagram of the locking mechanism of this utility model;

[0026] Figure 9 This is a side view of the kava of this utility model;

[0027] Figure 10 This is a schematic diagram of the structure of the extended component of this utility model;

[0028] Figure 11 This is a schematic diagram of the liquid-passing cavity structure of this utility model;

[0029] Figure 12 This is a schematic diagram of the central tube structure of this utility model;

[0030] Figure 13 This is a schematic diagram of the second embodiment of the switching tool of this utility model;

[0031] Figure 14 This is the second embodiment of the switching tool of this utility model, which is a connecting rod connection.

[0032] In the diagram: 1. Fracturing sleeve; 2. Switch tool; 3. Upper connector; 3. Internal thread I; 3. External thread I; 3. Internal thread II; 3. Sealing ring mounting groove I; 3. Slip seat; 4. Slip mounting groove; 4. Limiting boss; 4. Internal thread III; 4. Sealing surface; 4. Slip; 5. Mounting boss; 5. Guide block; 5. Fold; 6. Limiting ring; 7. Extension component; 7. Sealing ring mounting groove II; 7. Guide slope; 7. Guide groove; 7. Limiting ring mounting position; 7. Limiting plate; 75. Liquid passage cavity; 8. External thread II; 8. Sealing ring mounting groove III; 8. Liquid passage hole; 83. Central tube; 9. Wrench hole; 9. Sealing ring mounting groove IV; 9. External thread III; 9. Sealing ring mounting groove V; 9. Sealing ring mounting groove VI; 9. External thread IV; 96. Lower cavity; 10. Communication unit; 11. Guide head; 12. Connecting rod; 13. Slip valve core; 14. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figures 1 to 14 As shown, in order to achieve the technical effect of "acting as a 'smart key' to accurately and repeatedly open or close the target end slide sleeve, solving the problems of inaccurate opening of the target section slide sleeve and high operation difficulty of traditional tools", the structure and function of the hydraulic control intelligent fracturing slide sleeve repeated opening and closing tool will be explained in detail below.

[0035] Example 1, as Figures 1 to 10 As shown;

[0036] A hydraulically controlled intelligent fracturing sleeve repetitive switching tool includes a fracturing sleeve 1 and a switching tool 2 that can pass through or be locked in a sleeve valve core 14 inside the fracturing sleeve 1. The switching tool 2 includes a central tube 9 and an upper connector 3 fixedly connected to the end of the central tube 9. A slip seat 4 is fixedly connected to the upper connector 3, and a plurality of slips 5 are slidably connected to the slip seat 4. The other end of the central tube 9 is fixedly connected to a liquid passage chamber 8, and an extension component 7 that can push the plurality of slips 5 to expand outward is slidably connected to the liquid passage chamber 8.

[0037] The lower cavity 10 is fixedly connected to the liquid passage cavity 8. The central tube 9 is connected to the lower cavity 10. The liquid passage cavity 8 is provided with a plurality of liquid passage holes 83 that can communicate with the lower cavity 10. When pressurized liquid is introduced into the central tube 9, the liquid enters the lower cavity 10 and enters the liquid passage cavity 8 through the plurality of liquid passage holes 83, pushing the expansion component 7 to move laterally.

[0038] A guide head 12 is fixedly connected to the lower cavity 10, and a communication unit 11 is installed between the guide head 12 and the lower cavity 10. When the communication unit 11 detects the position of the target fracturing sleeve 1, it transmits a signal to the ground and controls the slip 5 to expand and contract through hydraulic control.

[0039] The slip seat 4 is provided with a slip mounting groove 41, and the slip 5 is fixedly connected with a mounting boss 51 that is slidably connected in the slip mounting groove 41;

[0040] Multiple slips 5 are provided with limit rings 6 on their outer sides; the limit rings 6 mainly serve to limit the slips, and when the slips 5 expand, the limit rings 6 break.

[0041] The locking seat 4 is fixedly connected to a limiting boss 42 for limiting the lateral movement of the extension component 7; it can limit the maximum axial displacement of the extension component 7.

[0042] The extension component 7 is provided with a guide slope 72 that contacts the slip 5, the slip 5 is provided with a guide block 52 on its side, the extension component 7 is provided with a guide groove 73, the guide block 52 is slidably connected in the guide groove 73, and the extension component 7 is provided with a limit ring mounting position 74 for installing the limit ring 6.

[0043] The outer side of the slip 5 is provided with multiple truncated pyramids 53; when seated, it can better engage with the fracturing sleeve 1 and be fixed firmly.

[0044] The upper connector 3 is fixedly connected to the slip seat 4 by threads. A sealing ring I is provided between the slip seat 4 and the upper connector 3. A sealing ring II is provided between the upper connector 3 and the central tube 9. A sealing ring III is provided between the slip seat 4 and the central tube 9. The liquid passage chamber 8 is fixedly connected to the central tube 9 by threads. A sealing ring IV is provided between the liquid passage chamber 8 and the expansion component 7. A sealing ring V is provided between the expansion component 7 and the central tube 9. The liquid passage chamber 8 is fixedly connected to the lower cavity 10 by threads. A sealing ring VI is provided between the lower cavity 10 and the liquid passage chamber 8. A sealing ring VII is provided between the lower cavity 10 and the guide head 12.

[0045] When using, such as Figure 1 As shown, the upper connector 3 of the hydraulically controlled intelligent fracturing sleeve repeatable switching tool is connected to the tubing or continuous tubing. The switching tool 2 automatically detects the fracturing sleeve 1 along the way. When it reaches the target section fracturing sleeve 1, the communication unit 11 transmits the signal to the ground and starts pressurizing and anchoring. The pressurized liquid passes through the central tube 9 and the liquid passage chamber 8, pushing the expansion component 7 to move axially. The expansion component 7 and the slip 5 cooperate with each other. Under the action of the guide groove 73 and the guide inclined surface 72, the slip 5 expands and crushes the limit ring 6. The slip 5 continues to expand, and the switching tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1.

[0046] Repeated opening process of each fracturing sleeve 1: The hydraulically controlled intelligent fracturing sleeve repeating switch tool 2 is lowered to the target fracturing sleeve 1 section through the tubing string. The pressure switch tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1. The tubing string is lowered, the sleeve valve core 14 moves downward, the fracturing hole of the fracturing sleeve 1 is exposed, the fracturing sleeve 1 is opened, the intelligent switch tool is depressurized, the slip 5 is retracted, and the switch tool 2 is lifted.

[0047] Repeated closing procedure for each fracturing sleeve 1: The hydraulically controlled intelligent fracturing sleeve repeating switch tool 2 is lowered to the target fracturing sleeve 1 section through the tubing string. The pressure switch tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1. The tubing string is lifted, the sleeve valve core 14 moves upward, the fracturing orifice of the fracturing sleeve 1 is closed, the fracturing sleeve 1 is closed, the intelligent switch tool is depressurized, the slip 5 retracts, and the switch tool 2 is lifted.

[0048] Example 2, as Figure 13 and Figure 14 As shown;

[0049] A hydraulically controlled intelligent fracturing sleeve repetitive switching tool includes a fracturing sleeve 1 and a switching tool 2 that can pass through or be locked inside the fracturing sleeve 1. The switching tool 2 includes a central tube 9 and an upper connector 3 fixedly connected to the end of the central tube 9. A slip seat 4 is fixedly connected to the upper connector 3, and a plurality of slips 5 are slidably connected to the slip seat 4. The other end of the central tube 9 is fixedly connected to a liquid passage chamber 8, and an extension component 7 that can push the plurality of slips 5 to expand outward is slidably connected to the liquid passage chamber 8.

[0050] The lower cavity 10 is fixedly connected to the liquid passage cavity 8. The central tube 9 is connected to the lower cavity 10. The liquid passage cavity 8 is provided with a plurality of liquid passage holes 83 that can communicate with the lower cavity 10. When pressurized liquid is introduced into the central tube 9, the liquid enters the lower cavity 10 and enters the liquid passage cavity 8 through the plurality of liquid passage holes 83, pushing the expansion component 7 to move laterally.

[0051] A guide head 12 is fixedly connected to the lower cavity 10, and a communication unit 11 is installed between the guide head 12 and the lower cavity 10. When the communication unit 11 detects the position of the target fracturing sleeve 1, it transmits a signal to the ground and controls the slip 5 to expand and contract through hydraulic control.

[0052] The slip seat 4 is provided with a slip mounting groove 41, and the slip 5 is fixedly connected with a mounting boss 51 that is slidably connected in the slip mounting groove 41;

[0053] Multiple slips 5 are provided with limit rings 6 on their outer sides; the limit rings 6 mainly serve to limit the slips, and when the slips 5 expand, the limit rings 6 break.

[0054] The locking seat 4 is fixedly connected to a limiting boss 42 for limiting the lateral movement of the extension component 7;

[0055] The outer side of the slip 5 is provided with multiple truncated pyramids 53; when seated, it can better engage with the fracturing sleeve 1 and be fixed firmly.

[0056] Multiple inclined connecting rods 13 are hinged between the extension component 7 and the multiple latches 5. A limiting plate 75 that can contact the limiting boss 42 is fixedly connected to the extension component 7, which can limit the maximum axial displacement of the extension component 7.

[0057] The upper connector 3 is fixedly connected to the slip seat 4 by threads. A sealing ring I is provided between the slip seat 4 and the upper connector 3. A sealing ring II is provided between the upper connector 3 and the central tube 9. A sealing ring III is provided between the slip seat 4 and the central tube 9. The liquid passage chamber 8 is fixedly connected to the central tube 9 by threads. A sealing ring IV is provided between the liquid passage chamber 8 and the expansion component 7. A sealing ring V is provided between the expansion component 7 and the central tube 9. The liquid passage chamber 8 is fixedly connected to the lower cavity 10 by threads. A sealing ring VI is provided between the lower cavity 10 and the liquid passage chamber 8. A sealing ring VII is provided between the lower cavity 10 and the guide head 12.

[0058] When using, such as Figure 13As shown, the upper connector 3 of the hydraulically controlled intelligent fracturing sleeve repeatable switching tool is connected to the tubing or continuous tubing. The switching tool 2 automatically detects the fracturing sleeve 1 along the way. When it reaches the target section fracturing sleeve 1, the communication unit 11 transmits the signal to the ground and starts pressurization and anchoring. The pressurized liquid passes through the central tube 9 and the liquid passage chamber 8, pushing the expansion component 7 to move axially. The expansion component 7 pushes the slip 5 to move through multiple inclined connecting rods 13. The slip 5 expands and crushes the limit ring 6. The slip 5 continues to expand, and the switching tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1.

[0059] Repeated opening process of each fracturing sleeve 1: The hydraulically controlled intelligent fracturing sleeve repeating switch tool 2 is lowered to the target fracturing sleeve 1 section through the tubing string. The pressure switch tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1. The tubing string is lowered, the sleeve valve core 14 moves downward, the fracturing hole of the fracturing sleeve 1 is exposed, the fracturing sleeve 1 is opened, the intelligent switch tool is depressurized, the slip 5 is retracted, and the switch tool 2 is lifted.

[0060] Repeated closing procedure for each fracturing sleeve 1: The hydraulically controlled intelligent fracturing sleeve repeating switch tool 2 is lowered to the target fracturing sleeve 1 section through the tubing string. The pressure switch tool 2 is anchored in the sleeve valve core 14 of the fracturing sleeve 1. The tubing string is lifted, the sleeve valve core 14 moves upward, the fracturing orifice of the fracturing sleeve 1 is closed, the fracturing sleeve 1 is closed, the intelligent switch tool is depressurized, the slip 5 retracts, and the switch tool 2 is lifted.

Claims

1. A hydraulically controlled intelligent fracturing sleeve repetitive switching tool, comprising a fracturing sleeve (1) and a switching tool (2) capable of passing through or being locked within a sleeve valve core (14) within the fracturing sleeve (1), characterized in that: The switching tool (2) includes a central tube (9) and an upper connector (3) fixedly connected to the end of the central tube (9). A slip seat (4) is fixedly connected to the upper connector (3), and multiple slips (5) are slidably connected to the slip seat (4). A liquid-filled cavity (8) is fixedly connected to the other end of the central tube (9), and an expansion component (7) that can push the multiple slips (5) to expand outward is slidably connected to the liquid-filled cavity (8).

2. The hydraulically controlled intelligent fracturing sleeve repeatable switching tool according to claim 1, characterized in that: The liquid passage chamber (8) is fixedly connected to the lower chamber (10), and the central tube (9) is connected to the lower chamber (10). The liquid passage chamber (8) is provided with a plurality of liquid passage holes (83) that can communicate with the lower chamber (10). When pressurized liquid is introduced into the central tube (9), the liquid enters the lower chamber (10) and enters the liquid passage chamber (8) through the plurality of liquid passage holes (83), pushing the expansion component (7) to move laterally.

3. The hydraulically controlled intelligent fracturing sleeve repetitive switching tool according to claim 2, characterized in that: A guide head (12) is fixedly connected to the lower cavity (10), and a communication unit (11) is installed between the guide head (12) and the lower cavity (10).

4. The hydraulically controlled intelligent fracturing sleeve repetitive switching tool according to claim 1, characterized in that: The slip seat (4) is provided with a slip mounting groove (41), and the slip (5) is fixedly connected with a mounting boss (51) that is slidably connected in the slip mounting groove (41).

5. The hydraulically controlled intelligent fracturing sleeve repetitive switching tool according to claim 4, characterized in that: Limiting rings (6) are provided on the outer side of multiple chucks (5).

6. The hydraulically controlled intelligent fracturing sleeve repeatable switching tool according to claim 5, characterized in that: The locking seat (4) is fixedly connected to a limiting boss (42) for limiting the lateral movement of the extension component (7).

7. The hydraulically controlled intelligent fracturing sleeve repeatable switching tool according to claim 6, characterized in that: The extension component (7) is provided with a guide slope (72) that contacts the slip (5), the slip (5) is provided with a guide block (52) on its side, the extension component (7) is provided with a guide groove (73), the guide block (52) is slidably connected in the guide groove (73), and the extension component (7) is provided with a limit ring mounting position (74) for installing the limit ring (6).

8. The hydraulically controlled intelligent fracturing sleeve repeatable switching tool according to claim 6, characterized in that: Multiple inclined connecting rods (13) are hinged between the extension component (7) and multiple latches (5), and a limiting plate (75) that can contact the limiting boss (42) is fixedly connected to the extension component (7).

9. The hydraulically controlled intelligent fracturing sleeve repeatable switching tool according to claim 1, characterized in that: The outer side of the kava (5) is provided with multiple frustums (53).

10. A hydraulically controlled intelligent fracturing sleeve repetitive switching tool according to claim 3, characterized in that: The upper connector (3) is fixedly connected to the slip seat (4) by threads. A sealing ring I is provided between the slip seat (4) and the upper connector (3). A sealing ring II is provided between the upper connector (3) and the central tube (9). A sealing ring III is provided between the slip seat (4) and the central tube (9). The liquid passage chamber (8) is fixedly connected to the central tube (9) by threads. A sealing ring IV is provided between the liquid passage chamber (8) and the expansion component (7). A sealing ring V is provided between the expansion component (7) and the central tube (9). The liquid passage chamber (8) is fixedly connected to the lower cavity (10) by threads. A sealing ring VI is provided between the lower cavity (10) and the liquid passage chamber (8). A sealing ring VII is provided between the lower cavity (10) and the guide head (12).

Images