Intelligent fracturing sliding sleeve opening label multi-stage fishing device

Abstract

The utility model relates to a pressure sliding sleeve label fishing device technology, in particular to an intelligent fracturing sliding sleeve opening label multi-stage fishing device. In order to improve the label salvage efficiency, the following scheme is adopted: the label salvage device comprises a shell, mounting holes are formed in the shell, and a clamping jaw device is arranged in one mounting hole; the clamping jaw device comprises a clamping jaw fixing seat, a mounting groove is formed in the end face, close to the axis of the shell, of the clamping jaw fixing seat, a trapezoidal clamping jaw is arranged in the mounting groove, a spring is arranged in the mounting groove, the two ends of the spring are fixedly connected to the clamping jaw fixing seat and the trapezoidal clamping jaw respectively, and the trapezoidal clamping jaw protrudes in the axis direction of the shell relative to the inner wall of the shell. And the clamping jaw fixing seat is fixedly connected to the shell. The intelligent fracturing sliding sleeve opening label multi-stage fishing device is lowered into the intelligent fracturing sliding sleeve through the oil pipe, labels are fished through the clamping jaw device, and batch fishing of the labels can be achieved.

Description

Technical Field

[0001] The utility model relates to a fracturing sleeve tag salvaging device technology, and more specifically to an intelligent fracturing sleeve opening tag multi-stage salvaging device. Background Art

[0002] After the fracturing of the intelligent fracturing sleeve is completed, the opened tags will remain in the fracturing sleeve tool. The conventional method is to use a drill to drill through the tags or use a salvage tool to salvage them. However, the conventional drilling method has low efficiency, high risk, and is easy to cause damage to the tool. The conventional salvage tool can only salvage one or several tags at a time, which takes a long time and is inefficient. Therefore, how to use a tool to improve the efficiency of tag salvage is an important technical issue facing the intelligent fracturing sleeve. Utility Model Content

[0003] The utility model provides an intelligent fracturing sliding sleeve opening tag multi-stage salvaging device, which aims to salvage batches of tags at one time.

[0004] The above purpose is achieved through the following technical solutions:

[0005] An intelligent fracturing sleeve opening tag multi-stage fishing device comprises a shell, a mounting hole is arranged on the shell, and a claw device is arranged in one mounting hole;

[0006] The claw device includes a claw fixing seat, a mounting groove is arranged on the end face of the claw fixing seat close to the axis of the shell, a trapezoidal claw is arranged in the mounting groove, a spring is arranged in the mounting groove, two ends of the spring are respectively fixed to the claw fixing seat and the trapezoidal claw, the trapezoidal claw protrudes toward the axial direction of the shell relative to the inner wall of the shell; the claw fixing seat is fixed to the shell.

[0007] A fixing screw is installed on the clamping claw fixing seat, and the fixing screw is screwed into the shell to fix the clamping claw fixing seat on the shell.

[0008] The claw fixing seat is a T-shaped structure, and the shell has an integrally connected shoulder in the mounting hole. The axially protruding part of the claw fixing seat abuts against the shoulder, and the fixing screws are screwed into the claw fixing seat and the shoulder in turn to fix the claw fixing seat.

[0009] The upper end surface of the trapezoidal clamping claw is a vertical surface, and the lower end surface of the trapezoidal clamping claw is an inclined surface, which extends upward when it is close to the axis of the shell.

[0010] Five circumferential positions are selected on the shell, and at least two mounting holes are arranged at each circumferential position.

[0011] The shell comprises an upper shell and a lower shell which are coaxially arranged, and the upper shell is detachably connected to the lower shell.

[0012] The inner diameters of the upper shell and the lower shell are equal.

[0013] A first reduced diameter section is arranged on the outer wall of the lower end of the upper shell, an external thread located on the reduced diameter section is arranged on the outer periphery of the upper shell, a second reduced diameter section is arranged on the inner wall of the upper end of the lower shell, an internal thread at the second reduced diameter section is arranged on the inner periphery of the lower shell, and the internal thread of the lower shell cooperates with the external thread of the upper shell to realize a detachable connection.

[0014] Among the five circumferential positions, two circumferential positions are selected in the upper shell, and three circumferential positions are selected in the lower shell.

[0015] The inner diameter of the housing is larger than the outer diameter of the tag.

[0016] The beneficial effects of the intelligent fracturing sliding sleeve opening tag multi-stage fishing device of the utility model are:

[0017] 1. The inclined surface of the trapezoidal claw and the contraction of the spring can ensure that the trapezoidal claw enters the tag slot; the vertical surface of the trapezoidal claw ensures that after the trapezoidal claw enters the slot in the tag, it can be stuck on the tag to complete the salvage of the tag.

[0018] 2. Because there may be cement in the label slot, in order to ensure that the trapezoidal claws can effectively hold the label, at least two trapezoidal claws are set on a circumferential position to ensure that the trapezoidal claws will not fail to hold the label due to failure of one claw, so as to ensure that the label is firmly fixed.

[0019] 3. The salvage device is lowered into the intelligent fracturing sleeve through the oil pipe, and the claw device in the salvage device salvages the tags to ensure that 10 tags are salvaged at a time.

[0020] 4. The salvage device is assembled from two parts: the upper shell and the lower shell, which is convenient for disassembly and assembly of the salvage device;

[0021] 5. The outer dimensions of the salvage device are uniform, and the inner diameter adopts a full-diameter design, which is larger than the outer diameter of the tag, to ensure that the tag can enter the inside of the salvage device smoothly.

[0022] 6. A large inclination angle is used in front of the salvage device to ensure that the salvage device can smoothly enter the intelligent fracturing sleeve;

[0023] 7. Each claw device adopts an independent structure and is fixed with screws, which makes it easy to replace the claw device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the salvage of the multi-stage salvage device for opening the tag of the intelligent fracturing sliding sleeve;

[0025] Figure 2 A schematic diagram of the structure of a multi-stage fishing device for opening a tag for an intelligent fracturing sliding sleeve;

[0026] Figure 3 M-direction view of the multi-stage fishing device with the tag turned on for the intelligent fracturing sleeve;

[0027] Figure 4 A partial enlarged view of the multi-stage fishing device for opening the tag of the intelligent fracturing sliding sleeve;

[0028] Figure 5 A schematic diagram showing the completion of opening the intelligent fracturing sleeve through a tag;

[0029] Figures 6 to 11 Schematic diagram of labels for salvaging various levels for salvaging equipment.

[0030] In the figure: it includes an upper shell 101, a claw device 102, a claw fixing seat 102-1, a trapezoidal claw 102-2, a spring 102-3, a fixing screw 102-4, a first claw device 102-a, a second claw device 102-b, a third claw device 102-c, a fourth claw device 102-d, a fifth claw device 102-e, a lower shell 103, a salvage oil pipe 104, a first-level intelligent fracturing sleeve 105-1, a second-level intelligent fracturing sleeve 105-2, a third-level intelligent fracturing sleeve 105-3, a first-level label 106-1, a second-level label 106-2, a third-level label 106-3, a fourth-level label 106-4, a fifth-level label 106-5, a sixth-level label 106-6, a seventh-level label 106-7, an eighth-level label 106-8, a ninth-level label 106-9, and a tenth-level label 106-10. DETAILED DESCRIPTION

[0031] An intelligent fracturing sliding sleeve opening tag multi-stage fishing device, reference Figure 2 , including a shell, the shell includes an upper shell 101 and a lower shell 103 which are coaxially arranged. For the convenience of description, the axis of the upper shell 101 and the axis of the lower shell 103 are collectively referred to as the shell axis. Preferably, the inner diameters of the upper shell 101 and the lower shell 103 are equal. A first reduced diameter section is arranged on the outer wall of the lower end of the upper shell 101, and an external thread located on the reduced diameter section is arranged on the outer periphery of the upper shell 101. A second reduced diameter section is arranged on the inner wall of the upper end of the lower shell 103, and an internal thread at the second reduced diameter section is arranged on the inner periphery of the lower shell 103. The internal thread of the lower shell 103 cooperates with the external thread of the upper shell 101 to realize a detachable connection; the inner diameters of the upper shell 101 and the lower shell 103 are larger than the outer diameter of the label.

[0032] Combination Figure 4, and also includes a claw device 102, the claw device 102 includes a claw fixing seat 102-1, the claw fixing seat 102-1 is a T-shaped structure, and a mounting groove is arranged on the end face of the claw fixing seat 102-1 close to the axis of the shell, and a trapezoidal claw 102-2 is inserted in the mounting groove, so that the trapezoidal claw 102-2 can move radially in the mounting groove, and a spring 102-3 is arranged in the mounting groove, and the two ends of the spring 102-3 are respectively fixed to the claw fixing seat 102-1 and the trapezoidal claw 102-2, so that the spring 102-3 provides a force for the trapezoidal claw 102-2 to move toward the axis of the shell, so that the trapezoidal claw 102-2 has a tendency to move toward the axis of the shell, and a fixing screw 102-4 is installed on the claw fixing seat 102-1.

[0033] The claw fixing seat 102-1 is fixed to the housing by fixing screws 102-4, so that the claw device 102 can be installed on the upper shell 101 and the lower shell 103. Preferably, two circumferential positions are selected on the upper shell 101, and three circumferential positions are selected on the lower shell 103, and at least two claw devices 102 are evenly arranged on each circumferential position, and preferably four claw devices 102 are evenly arranged on each circumferential position, with a total of 20 claw devices 102; the upper shell 101 and the lower shell 103 are provided with mounting holes with the same number as the claw devices 102, and the shell has an integrally connected shoulder in the mounting hole, which is generated by the necking in the mounting hole, and the 20 mounting holes are respectively equipped with the claw fixing seats 102-1 of the 20 claw devices 102;

[0034] For ease of description, Figure 2 In the figure, the claw devices 102 at the five circumferential positions are respectively marked as the first claw device 102-a, the second claw device 102-b, the third claw device 102-c, the fourth claw device 102-d and the fifth claw device 102-e;

[0035] The first claw device 102-a and the second claw device 102-b are fixedly connected to the upper shell 101 by fixing screws 102-4, and the third claw device 102-c, the fourth claw device 102-d and the fifth claw device 102-e are fixedly connected to the lower shell 103 by fixing screws 102-4; the trapezoidal claw 102-2 protrudes from the inner wall of the shell in the initial state. The trapezoidal claw 102-2 is used to be clamped in the slot set on the outer wall of the label, the upper end of the trapezoidal claw 102-2 is a vertical surface, and the lower end of the trapezoidal claw 102-2 is an inclined surface, which extends upward when it is close to the axis of the shell.

[0036] Working principle: After the completion of the well fracturing, the first-level tag 106-1 will be placed in the first-level intelligent fracturing sleeve 105-1. Figure 5The multi-stage salvage device of the smart fracturing sleeve opening tag is lowered into the first-stage smart fracturing sleeve 105-1 by salvaging the oil pipe 104. The trapezoidal claw 102-2 retracts first due to the front inclined surface and the elastic force of the spring 102-3, and then pops out and is stuck in the slot of the first-stage tag 106-1. Figure 6 The wellhead is lifted to salvage the oil pipe 104. At this time, the multi-stage salvage device with the smart fracturing sleeve opening tag will move with the first-stage tag 106-1 through the trapezoidal claw 102-2. Because the expansion ring of the first-stage tag 106-1 is larger than the inner diameter of the first-stage smart fracturing sleeve 105-1, the expansion ring will be stuck to the step of the first-stage smart fracturing sleeve 105-1 during the movement. Figure 7 Because the expansion ring is stuck to the step of the first-stage intelligent fracturing sleeve 105-1, during the process of continuing to lift the salvaged oil pipe 104, the tail of the first-stage tag 106-1 is pulled open due to the expansion ring retraction device inside the first-stage tag 106-1, and the expansion ring retracts. Figure 8 The first-stage tag 106-1 is recovered successfully, and the salvage oil pipe 104 continues to be lowered to salvage the second-stage tag 106-2. The first-stage tag 106-1 enters the interior of the lower shell 103 of the salvage device due to the top force of the second-stage tag 106-2. At the same time, the trapezoidal claw 102-2 is clamped into the clamping groove of the second-stage tag 106-2 due to the elastic force of the spring 102-3. Fig. 9 The salvaged oil pipe 104 continues to be lifted, the principle is the same as above. Figure 6 and Figure 7 When the third-level tag 106-3 is salvaged, the second-level tag 106-2 and the first-level tag 106-1 are pushed into the lower shell 103 by the third-level tag 106-3. At this time, the first-level tag 106-1 will pass through the fourth claw device 102-d, and the trapezoidal claw 102-2 in the fourth claw device 102-d will lock the first-level tag 106-1. Fig.10 By repeating the above working principle, 10 levels of tags can be salvaged at one time, wherein the first clamping claw device 102-a will clamp the second level tag 106-2, the second clamping claw device 102-b will clamp the fourth level tag 106-4, the third clamping claw device 102-c will clamp the sixth level tag 106-6, the fourth clamping claw device 102-d will clamp the eighth level tag 106-8, and the fifth clamping claw device 102-e will clamp the tenth level tag 106-10. Fig.11 After the 10th level of labels are salvaged, the salvage pipe 104 is lifted, and the salvage device 102 and the labels of each level are lifted out of the wellhead. Due to the structure of the trapezoidal claw 102-2, the labels of each level are pushed from the tenth level, and the labels of each level are taken out in sequence.

Claims

1. An intelligent fracturing sleeve opening tag multi-stage fishing device, comprising a shell, wherein the shell is provided with at least two mounting holes along the axial direction, and a claw device (102) is provided in one mounting hole; It is characterized in that The clamping claw device (102) comprises a clamping claw fixing seat (102-1), an end surface of the clamping claw fixing seat (102-1) close to the axis of the shell is provided with a mounting groove, a trapezoidal clamping claw (102-2) is provided in the mounting groove, a spring (102-3) is provided in the mounting groove, two ends of the spring (102-3) are respectively fixed to the clamping claw fixing seat (102-1) and the trapezoidal clamping claw (102-2), the trapezoidal clamping claw (102-2) protrudes relative to the inner wall of the shell in the axial direction of the shell; the clamping claw fixing seat (102-1) is fixed to the shell.

2. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 1 is characterized in that: A fixing screw (102-4) is installed on the claw fixing seat (102-1), and the fixing screw (102-4) is screwed into the shell to fix the claw fixing seat (102-1) on the shell.

3. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 2 is characterized in that: The claw fixing seat (102-1) is a T-shaped structure, the shell has an integrally connected shoulder in the mounting hole, the axially protruding portion of the claw fixing seat (102-1) abuts against the shoulder, and the fixing screw (102-4) is screwed into the claw fixing seat (102-1) and the shoulder in sequence to fix the claw fixing seat (102-1).

4. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 1 is characterized in that: The upper end surface of the trapezoidal clamping claw (102-2) is a vertical surface, and the lower end surface of the trapezoidal clamping claw (102-2) is an inclined surface, which extends upward when approaching the axis of the housing.

5. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 1 is characterized in that: Five circumferential positions are selected on the shell, and at least two mounting holes are arranged at each circumferential position.

6. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 5 is characterized in that: The housing comprises an upper housing (101) and a lower housing (103) which are coaxially arranged, and the upper housing (101) and the lower housing (103) are detachably connected.

7. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 6 is characterized in that: The inner diameters of the upper shell (101) and the lower shell (103) are equal.

8. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 6 is characterized in that: The outer wall at the lower end of the upper shell (101) is provided with a first reduced diameter section, the outer circumference of the upper shell (101) is provided with an external thread located on the reduced diameter section, the inner wall at the upper end of the lower shell (103) is provided with a second reduced diameter section, the inner circumference of the lower shell (103) is provided with an internal thread of the second reduced diameter section, and the internal thread of the lower shell (103) cooperates with the external thread of the upper shell (101) to achieve a detachable connection.

9. The intelligent fracturing sleeve opening tag multi-stage salvage device according to any one of claims 5 to 8, characterized in that: Among the five circumferential positions, two circumferential positions are selected on the upper shell (101) and three circumferential positions are selected on the lower shell (103).

10. The intelligent fracturing sleeve opening tag multi-stage salvage device according to claim 1, characterized in that: The inner diameter of the housing is larger than the outer diameter of the tag.

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