Anchoring device of underground electric drive oil pipe cutting tool

Abstract

The utility model relates to an anchoring device of an underground electric drive oil pipe cutting tool. The problems that anchoring is not firm, rooting is not stable and the like in the prior art are solved. The piston is connected with the outer shell through a pin and a threaded sleeve, the motor control short section is connected with a hydraulic cavity, the upper end face of the hydraulic cavity is connected with a metal plug, and the lower end face of the hydraulic cavity is connected with a hydraulic oil inlet pipe. The sealing inner shell is located between the piston and the outer shell, the anchoring shell and the inner shell are connected through a sealing ring and a screw, one end of the anchoring hinge is connected with the anchoring shell through a hinge pin, the other end of the anchoring hinge is connected with the anchoring cone block through a hinge pin, and a screw pin blind hole formed in the anchoring sliding block is not in contact with the anchoring shell. The anchoring hinge is connected with the anchoring sliding block through a hinge pin, and a fastening pin is nailed into the center of the anchoring hinge. The hydraulic anchoring device has the advantages that anchoring response is faster, driving force is larger, large loads can be borne, anchoring failure can be effectively avoided, the three anchoring points in the circumferential direction can adapt to different environments, anchoring can be conducted at any position and any place, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole tools in oil fields, in particular to a downhole anchoring tool. Background Art

[0002] In oil and gas exploration and development projects, in order to solve the process problems encountered in drilling, it is often necessary to install tools at a certain anchoring position in the casing. After being anchored in the casing, the anchor acts as a base. However, the existing anchoring tools generally have problems of loose anchoring and unstable rooting during actual use. Utility Model Content

[0003] The utility model aims to solve the problems of weak anchoring in the prior art and further provides an anchoring device for a downhole electric drive oil pipe cutting tool.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] The utility model discloses an anchoring device for a downhole electric-driven oil pipe cutting tool, wherein one end of a sealed inner shell is connected to a connecting shell of other functional short sections through a connecting block, and the other end is connected to the inner shell through a screw, the piston is connected to the outer shell through a pin and a threaded sleeve, the motor controls the short section to be connected to a hydraulic cavity, the upper end face of the hydraulic cavity is connected to a metal plug, and the lower end face is connected to a hydraulic oil inlet pipe, the sealed inner shell is located between the piston and the outer shell, the anchoring shell is connected to the inner shell through a sealing ring and a screw, one end of an anchoring hinge is connected to the anchoring shell through a hinge pin, and the other end is connected to the anchoring hinge and the anchoring cone block through a hinge pin, a screw pin blind hole is provided on the anchoring slider and does not contact the anchoring shell, the anchoring hinge is connected to the anchoring slider through a hinge pin, and a tightening pin is nailed into the center.

[0006] The utility model provides an anchoring device for a downhole electric drive oil pipe cutting tool, which is characterized in that the lower surface of the anchoring slide block corresponds to the outer diameter of the anchoring shell, and the upper surface corresponds to the inner diameter of the shell.

[0007] The utility model provides an anchoring device for a downhole electric drive oil pipe cutting tool, which is characterized in that the upper end surface of the screw pin is higher than the upper surface of the anchoring sliding block.

[0008] The utility model provides an anchoring device for a downhole electric drive oil pipe cutting tool, which is characterized in that three anchoring assemblies consisting of an anchoring slide block, an anchoring hinge, an anchoring cone block, a hinge pin and a tightening pin are distributed in the circumferential direction of the same cross section.

[0009] The utility model provides an anchoring device for a downhole electric drive oil pipe cutting tool, which is characterized in that the groove on the sealing inner shell corresponds to the travel range of the piston moving along the hydraulic cavity.

[0010] The utility model is an anchoring device for a downhole electric drive oil pipe cutting tool, which is characterized in that the width of the groove opened on the outer shell due to the screw connection of the sealing inner shell and the inner shell corresponds to the travel range of the outer shell moving along the inner shell.

[0011] Compared with the prior art, the utility model has the following beneficial effects: faster anchoring response through hydraulic pressure, greater driving force, ability to withstand larger loads, effective avoidance of anchoring failure, three circumferential anchoring points that can adapt to different environments, and anchoring can be performed anywhere at any position, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the unfolding structure of the anchoring assembly in the utility model;

[0014] Figure 3 It is a closed schematic diagram of the anchoring assembly structure in the utility model;

[0015] In the figure: 1. Connecting shell; 2. Hydraulic oil inlet pipe; 3. Hydraulic cavity; 3a. Hydraulic cavity hole; 4. Connecting block; 5. Sealing inner shell; 6. Threaded sleeve; 7. Pin; 8. Piston; 9. Screw; 10. Metal plug; 11. Motor control short section; 12. Inner shell; 13. Outer shell; 13a. Groove width; 14. Anchor shell; 15. Sealing ring; 16. Tightening pin; 17. Anchor hinge; 18. Anchor cone block; 19. Hinge pin; 20. Anchor slider; 21. Screw pin. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-3 The utility model is further described with specific implementation modes, but is not intended to limit the utility model in any way.

[0017] The utility model is based on the following anchoring device of a downhole electric drive oil pipe cutting tool, as follows: Figure 1-3As shown: This method utilizes the height difference between the anchor shell 14 and the outer shell 13, and controls the hydraulic oil from the hydraulic oil inlet pipe 2 to enter the hydraulic cavity 3 through the motor control short section 11. The hydraulic oil will flow into the sealed inner shell 5 from the hydraulic cavity hole 3a and push the piston 8 to move downward. The piston 8 is connected to the outer shell 13 through the tightening pin 7 and the threaded sleeve 6, driving the outer shell 13 to move downward. The movement of the outer shell 13 pushes the slider pin 21 to drive the anchor slider 20 to move downward, so that the anchor hinge 17 is bent, and the hinge pin 17 drives the anchor cone block 18 to open outward to achieve anchoring with the external oil pipe. One end of the sealed inner shell 5 is connected to the connecting shell 1 of the other functional short sections through the connecting block 4, and the other end is connected to the inner shell 13 through the screw 9, so that the interior of the anchoring device is connected as a whole, ensuring that the anchor shell 14 does not move when the outer shell 13 moves, and the inside of the tool is in a closed environment. The anchor shell 14 and the inner shell 13 are connected through the sealing ring 15 and the screw 9 to ensure the internal pressure sealing of the tool. The screw pin 21 on the anchoring slider 20 does not contact the anchoring shell 14, and its main function is to generate a height so that the outer shell 13 can push the anchoring slider 20 to move, thereby realizing anchoring self-locking.

[0018] The utility model is a downhole anchoring device for a tubing plugging tool constructed according to the above method, such as Figure 1-3 As shown, one end of the sealed inner shell 5 is connected to the connecting shell 1 of the other functional short sections through the connecting block 4, and the other end is connected to the inner shell 12 through the screw 9. The piston 8 is connected to the outer shell 13 through the pin 7 and the threaded sleeve 6. The motor control short section 11 is connected to the hydraulic chamber 3. The upper end surface of the hydraulic chamber 3 is connected to the metal plug 10, and the lower end surface is connected to the hydraulic oil inlet pipe 2. The sealed inner shell 5 is located between the piston 8 and the outer shell 13. The anchor shell 14 is connected to the inner shell 12 through the sealing ring 15 and the screw 9. One end of the anchor hinge 17 is connected to the anchor shell 14 through the hinge pin 19, and the other end is connected to the anchor hinge 17 and the anchor cone block 18 through the hinge pin 19. The anchor slider 20 is provided with a blind hole with a screw pin 21 that does not contact the anchor shell 14. The anchor hinge 17 is connected to the anchor slider 20 through the hinge pin 19, and a tightening pin 16 is nailed into the center. The lower surface of the anchoring slider 20 corresponds to the outer diameter of the anchoring shell 14, and the upper surface corresponds to the inner diameter of the outer shell 13. The upper end surface of the screw pin 21 should be higher than the upper surface of the anchoring slider 20. The anchoring assembly consisting of the anchoring slider 20, the anchoring hinge 17, the anchoring cone block 18, the hinge pin 19 and the locking pin 16 is distributed in three circumferential directions on the same cross section. The groove on the sealing inner shell 5 corresponds to the travel range of the piston 8 along the hydraulic chamber 3. The groove width 13a opened on the outer shell 13 because the screw 9 connects the sealing inner shell 5 and the inner shell 12 corresponds to the travel range of the outer shell 13 along the inner shell 12.

[0019] Example

[0020] During the anchoring process, the motor controls the short section 11 to control the hydraulic oil to enter the hydraulic cavity 3 from the hydraulic oil inlet pipe 2. The hydraulic oil will flow into the sealed inner shell 5 from the hydraulic cavity hole 3a and push the piston 8 to move downward. The piston 8 is connected to the outer shell 13 through the pin 7 and the threaded sleeve 6, driving the outer shell 13 to move downward. The outer shell 13 is connected to the anchoring slider 20 through the screw pin 21, so that the anchoring slider 20 moves downward. Due to the downward movement of the anchoring slider 20, the two anchoring hinges 17 are bent to realize the opening action of the anchoring. The anchoring cone block 18 connected between the anchoring hinges 17 anchors the target pipeline after opening. The anchoring cone block 18 is covered with anchoring teeth, which can increase friction to ensure the anchoring force and anchoring effect.

Claims

1. An anchoring device for a downhole electric drive oil pipe cutting tool, characterized in that: One end of the sealed inner shell (5) is connected to the connecting shell (1) of the other functional short sections through a connecting block (4), and the other end is connected to the inner shell (12) through a screw (9). The piston (8) is connected to the outer shell (13) through a pin (7) and a threaded sleeve (6). The motor control short section (11) is connected to the hydraulic chamber (3). The upper end surface of the hydraulic chamber (3) is connected to the metal plug (10), and the lower end surface is connected to the hydraulic oil inlet pipe (2). The sealed inner shell (5) is located between the piston (8) and the outer shell (13). The fixed shell (14) and the inner shell (12) are connected by a sealing ring (15) and a screw (9); one end of the anchor hinge (17) is connected to the anchor shell (14) by a hinge pin (19); the other end is connected to the anchor hinge (17) and the anchor cone block (18) by a hinge pin (19); a blind hole with a screw pin (21) is provided on the anchor slider (20) and does not contact the anchor shell (14); the anchor hinge (17) and the anchor slider (20) are connected by the hinge pin (19), and a tightening pin (16) is nailed into the center.

2. The anchoring device of a downhole electric drive oil pipe cutting tool according to claim 1, characterized in that: The lower surface of the anchoring slider (20) corresponds to the diameter of the outer diameter of the anchoring shell (14), and the upper surface corresponds to the diameter of the inner diameter of the outer shell (13).

3. The anchoring device of a downhole electric drive oil pipe cutting tool according to claim 1, characterized in that: The upper end surface of the screw pin (21) should be higher than the upper surface of the anchoring slide block (20).

4. The anchoring device of a downhole electric drive oil pipe cutting tool according to claim 1, characterized in that: Three anchoring assemblies consisting of an anchoring slider (20), an anchoring hinge (17), an anchoring cone block (18), a hinge pin (19) and a fixing pin (16) are distributed in the circumferential direction of the same cross section.

5. The anchoring device of a downhole electric drive oil pipe cutting tool according to claim 1, characterized in that: The groove on the sealing inner shell (5) corresponds to the travel range of the piston (8) moving along the hydraulic chamber (3).

6. The anchoring device of a downhole electric drive oil pipe cutting tool according to claim 1, characterized in that: The width of the groove (13a) opened on the outer shell (13) due to the screw (9) connecting the sealed inner shell (5) and the inner shell (12) corresponds to the travel range of the outer shell (13) moving along the inner shell (12).

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