A completion tool packoff slip assembly mounting structure

Abstract

The utility model discloses a kind of completion tool packer slip assembly mounting structure, including liner, center tube, upper cone, lower cone, split slip, slip sleeve and lower rubber cylinder seat, center tube eccentric and sealing fixed installation in liner inside;Upper cone and lower rubber cylinder seat are slidably sleeved and installed on liner, lower cone is fixedly sleeved and installed on liner, lower rubber cylinder seat is fixed on liner by first shear nail;Slip sleeve is slidably sleeved and installed on upper cone, lower cone;Split slip middle part has slot, slip sleeve is annularly distributed and is provided with the bayonet of cooperation with split slip, the same bayonet middle part is provided with the partition that cooperates with slot this slip assembly mounting structure is applied to recyclable cable through packer, when releasing setting force, recycling packer, under the action of leaf spring elasticity, split slip is pushed to liner close and wellbore inner wall separates, realize cable through packer recycling.

Description

Technical Field

[0001] This utility model belongs to the field of well completion tool technology, and in particular relates to an installation structure for a packer slip assembly of a well completion tool. Background Technology

[0002] The through-cable packer is a single-pass, single-channel, hydraulically set packer equipped with dual heads, designed to reduce the overall cost of ESP completion operations. This packer is mounted on the tubing string, preserving the complete production tubing inner diameter while allowing passage for cables and control lines. The annular slotted slips deform and anchor to the wellbore inner wall after packer setting, exhibiting poor rebound and are used for permanent packers. Through-cable packers allow for packer retrieval, requiring slip assemblies capable of automatic rebound after pressure release, improving retrieval reliability and operational flexibility. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a mounting structure for a slip assembly of a recyclable line packer.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a well completion tool packer slip assembly installation structure, including a liner, a central tube, an upper cone, a lower cone, split slips, slip sleeves and a lower rubber sleeve seat, wherein the central tube is eccentrically and sealed and fixedly installed inside the liner; An upper cone and a lower rubber sleeve seat are slidably sleeved on the liner, and a lower cone is fixedly sleeved on the liner. The lower rubber sleeve seat is fixed to the liner by a first shear pin. The slip sleeve is slidably installed on the upper and lower cones; The split-type clamp has a groove in the middle, and the clamp sleeve has a ring of slots that mate with the split-type clamp. A partition that mates with the groove is set in the middle of the same slot. The array of split-type clamps is arranged in a ring and fitted onto the liner. The two ends of the split-type clamp are placed in the slots of the clamp sleeve. The split-type clamp can only slide up and down in the slots. A leaf spring is embedded in the groove in the middle of the split-type clamp. The two ends of the leaf spring act on the clamp sleeve, and the middle of the leaf spring presses against the split-type clamp.

[0005] Preferably, the slip sleeve is also provided with shear pin holes arranged in a ring, and the slip sleeve is fixed to the upper cone by the shear pin holes and the second shear pin limiting and fixing.

[0006] Preferably, the slip sleeve has an axially elongated oval hole arranged in a ring array, and the lower cone has a guide screw fixedly installed in a ring array, with the axially elongated oval hole slidably sleeved on the guide screw.

[0007] Preferably, four sets of split-type clips are arranged in a ring on the liner.

[0008] Compared with the prior art, the advantages of this utility model are: the installation structure of this slip assembly is applied to recyclable cable packers. When the setting force is released and the packer is retrieved, the split slips are pushed towards the liner and separated from the inner wall of the wellbore under the action of the leaf spring, so as to realize the retrieval of the cable packer. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Figure 1 This is a perspective view of the present invention.

[0011] Figure 2 This is a diagram showing the installation structure of a split-type clamp and leaf spring.

[0012] Figure 3 This is the front view of this utility model.

[0013] Figure 4 This is the right view of this utility model.

[0014] Figure 5 yes Figure 4 A sectional view along line AA.

[0015] Figure 6 It is a 3D image of the Kawasaki. Detailed Implementation

[0016] The present invention will now be described in detail with reference to specific embodiments: like Figures 1 to 6 The installation structure of a packer slip assembly for a well completion tool shown includes a liner 1, a central tube 2, an upper cone 3, a lower cone 4, a split slip 5, a slip sleeve 6, and a lower rubber sleeve seat 8. The central tube 2 is eccentrically and sealed and fixedly installed inside the liner 1. The liner 1 is slidably fitted with an upper cone 3 and a lower rubber sleeve seat 8, and the liner 1 is fixedly fitted with a lower cone 4. The lower rubber sleeve seat 8 is fixed to the liner 1 by a first shear pin. The slip sleeve 6 is slidably mounted on the upper cone 3 and the lower cone 4; The split-type slip 5 has a groove in the middle. The slip sleeve 6 has a ring of slots 61 that cooperate with the split-type slip 5. A partition 62 that cooperates with the groove is provided in the middle of the same slot 61. The array of split-type slips 5 are arranged in a ring and attached to the liner tube 9. The two ends of the split-type slip 5 are placed in the slots 61 of the slip sleeve 6. The split-type slip 5 can only slide up and down in the slots 61. A leaf spring 9 is embedded in the groove in the middle of the split-type slip 5. The two ends of the leaf spring 9 act on the slip sleeve 6, and the middle of the leaf spring 9 presses against the split-type slip 5.

[0017] The slip sleeve 6 is also provided with shear pin holes 64 arranged in a ring. The slip sleeve 6 is fixed to the upper cone 3 by the shear pin holes 64 and the second shear pin 641, so as to prevent the slip sleeve 6 and the upper cone 3 from moving axially relative to each other before setting.

[0018] The slip sleeve 6 has an axial elongated hole 63 arranged in a ring array, and the lower cone 4 has a guide screw 631 fixedly installed in a ring array. The axial elongated hole 63 is slidably sleeved on the guide screw 631 to prevent the slip sleeve 6 from rotating and to allow the slip sleeve 6 to move only axially.

[0019] The split slips 5 are arranged in a ring on the liner 9 in four sets, so that the split slips 5 have a better anchoring effect after they are fitted with the inner wall of the well.

[0020] When the packer is set, the lower rubber sleeve seat 8 moves to the left, shearing off the first shear pin. This pushes the assembly of the upper cone 3, lower cone 4, split slip 5, and slip sleeve 6 to the right, shearing off the second shear pin. After the lower cone 4 contacts and is limited by the liner cap fixed to the right end of the liner 1, the lower cone 4 stops moving. The upper cone 3, split slip 5, and slip sleeve 6 continue to move to the right, pushing the split slip 5 outward to form an anchoring effect with the inner wall of the wellbore. When the packer is retrieved, it moves back to its original position from the set state. The lower rubber sleeve seat 8 moves to the left, and under the action of the leaf spring 9, pushes the split slip 5 towards the liner 9 to separate from the inner wall of the wellbore.

Claims

1. A completion tool packoff slip assembly mounting structure, characterized by: It includes a liner (1), a central tube (2), an upper cone (3), a lower cone (4), a split slip (5), a slip sleeve (6), and a lower rubber sleeve seat (8). The central tube (2) is eccentrically and sealed and fixedly installed inside the liner (1). The liner (1) is slidably fitted with an upper cone (3), a lower cone (4) and a lower rubber sleeve seat (8). The liner (1) is fixedly fitted with a lower cone (4). The lower rubber sleeve seat (8) is fixed to the liner (1) by a first shear pin. The lower cone (4) is fixed to the liner (1) by a second shear pin. The upper cone (3) is in contact with the lower rubber sleeve seat (8). The slip sleeve (6) is slidably mounted on the upper cone (3) and the lower cone (4); The split-type slip (5) has a slot in the middle. The slip sleeve (6) has a ring of slots (61) that cooperate with the split-type slip (5). The same slot (61) has a partition (62) that cooperates with the slot. The split-type slips (5) are arranged in a ring and attached to the liner (1). The two ends of the split-type slip (5) are placed in the slots (61) of the slip sleeve (6). The split-type slip (5) can only slide up and down in the slots (61). A leaf spring (9) is embedded in the slot in the middle of the split-type slip (5). The two ends of the leaf spring (9) act on the slip sleeve (6), and the middle of the leaf spring (9) presses against the split-type slip (5).

2. The completion tool packoff slip assembly mounting structure of claim 1, wherein: The slip sleeve (6) is also provided with shear pin holes (64) arranged in a ring. The slip sleeve (6) is fixed to the upper cone (3) by the second shear pin (641) through its shear pin holes (64).

3. The completion tool packoff slip assembly mounting structure of claim 1, wherein: The slip sleeve (6) has an axial elongated hole (63) arranged in a ring array, and the lower cone (4) has a guide screw (631) fixedly installed in a ring array. The axial elongated hole (63) is slidably sleeved on the guide screw (631).

4. The well completion tool packer slip assembly installation structure according to claim 1, characterized in that: The split-type cladding (5) is arranged in a ring on the liner (1) in four sets.

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