A packer pawl ball seat

Abstract

The utility model discloses a kind of packer ratchet ball seat, including upper joint, lower joint, ball seat, retainer ring, shear ring and shear nail, upper joint is sealingly fixedly connected with lower joint, first through-hole, reaming groove and first step hole are coaxially arranged in upper joint, lower joint has second through-hole, second step hole and third step hole, ball seat has third through-hole in it, ball seat ring is rested on the step surface of first step hole, long hole, which is communicated with third through-hole, is arranged in annular array on ball seat, shear ring can be pushed into third step hole. This structure allows drilling fluid circulation operation before ball is thrown, after packer is set, the pressure that continuously exerts will push steel ball and ball seat to move downwards, until the ratchet of ball seat pops into preset reaming groove, to open passage, so that steel ball can also smoothly enter lower oil pipe through ball seat, nipple becomes full bore structure.

Description

Technical Field

[0001] This utility model belongs to the field of packer technology for well completion tools, and in particular relates to a packer ratchet ball seat. Background Technology

[0002] Packer ball seats are downhole tools used for setting hydraulic packers. By dropping a ball, the tubing is sealed, providing a pressure channel for the packer and ensuring successful setting. After the steel ball is dropped, the ball seat forms a seal with the inner wall of the tubing joint, creating a closed space within the tubing, facilitating packer setting through wellhead pressurization. Currently, after packer setting, mechanical force or the use of a special material to dissolve the ball is required to separate it from the ball seat, allowing the ball seat to be opened to full bore. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a packer pawl ball seat where the pawl of the ball seat opens after the packer is set, so that the steel ball enters the lower oil pipe.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a packer pawl ball seat, comprising an upper connector, a lower connector, a ball seat, a retaining ring, a shearing ring, and a shearing pin. The upper connector and the lower connector are sealed and fixedly connected. The upper connector has a first through hole, an enlarged groove, and a first stepped hole coaxially arranged inside. The lower connector has a second through hole, a second stepped hole, and a third stepped hole. The ball seat has a third through hole. The ball seat ring abuts against the stepped surface of the first stepped hole. The necked section of the ball seat is located in the enlarged groove. The retaining ring is fixedly installed in the second stepped hole. The right end of the ball seat and the shearing ring are slidably installed in the retaining ring. The shearing ring is fixed to the retaining ring by the shearing pin. A steel ball for sealing the left end of the third through hole is arranged inside the ball seat ring. The ball seat has elongated holes connected to the third through hole arranged in a ring array. The shearing ring can be pushed into the third stepped hole. The left end of the ball seat has a slit arranged in a ring array extending to the center of the elongated hole.

[0005] Preferably, the right end of the ball seat is configured as a frustum-shaped sleeve structure.

[0006] Preferably, the right end face of the expansion groove is set as a limiting inclined surface that matches the necking section of the ball seat.

[0007] Preferably, the retaining ring is pressed and fixed in the second step hole of the lower connector at the right end of the upper connector.

[0008] Compared with the prior art, the advantages of this utility model are: this structure allows drilling fluid circulation before ball deployment. After the packer is set, the continuously applied pressure will push the steel ball and ball seat downward until the pawl of the ball seat pops into the preset expansion groove, thereby opening the channel and allowing the steel ball to pass through the ball seat and smoothly enter the lower tubing. The short section becomes a full-bore structure. 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 the right view of this utility model.

[0012] Figure 3 yes Figure 2 A sectional view along the AA direction.

[0013] Figure 4 It is a 3D diagram of the ball seat.

[0014] Figure 5 This is a sectional view of the installation structure of the upper and lower connectors. Detailed Implementation

[0015] The present invention will now be described in detail with reference to specific embodiments:

[0016] like Figures 1 to 5 The packer ratchet ball seat shown includes an upper connector 1, a lower connector 2, a ball seat 3, a retaining ring 4, a shear ring 5, and a shear pin 6. The upper connector 1 and the lower connector 2 are sealed and fixedly connected. The upper connector 1 has a first through hole 10, a reaming groove 11, and a first stepped hole 12 coaxially arranged inside. The lower connector 2 has a second through hole 20, a second stepped hole 21, and a third stepped hole 22. The ball seat 3 has a third through hole. The ball seat 3 abuts against the stepped surface of the first stepped hole 12. The necked section 30 of the ball seat 3 is located at... Inside the enlarged slot 11, the retaining ring 4 is fixedly installed inside the second stepped hole 21. The right end of the ball seat 3 and the shearing ring 5 are slidably installed inside the retaining ring 4. The shearing ring 5 is fixed to the retaining ring 4 by the shearing pin 6. The ball seat 3 has a steel ball 7 for sealing the left end of the third through hole inside the seat ring. The ball seat 3 has an elongated hole 31 connected to the third through hole arranged in a ring array. The left end of the ball seat 3 has a slit 34 extending to the center of the elongated hole 31 arranged in a ring array. The shearing ring 5 can be pushed into the third stepped hole 22.

[0017] The right end of the ball seat 3 is configured as a frustum-shaped sleeve structure, which can secure steel balls 7 of various sizes within the frustum-shaped sleeve structure on the right end of the ball seat 3. This structure has the advantage of strong adaptability and provides better sealing for the third through hole of the ball seat 3.

[0018] The right end face of the enlarged groove 11 is set as a limiting inclined surface 13 that cooperates with the necked section 30 of the ball seat 3. The inclined surface structure 13 can hold and fix the necked section 30, increase the contact area between the two, reduce the pressure at a single point, and avoid deformation and damage.

[0019] The upper connector 1 presses and fixes the retaining ring 4 into the second step hole 21 of the lower connector 2, making the fixation of the retaining ring 4 more secure and preventing it from axially displacing to the left.

[0020] A steel ball 7 forms a seal on the seat ring of the ball seat 3, thereby establishing pressure to complete the packer setting. After the packer is set, the continuously applied pressure pushes the steel ball 7 and the ball seat 3 downward. After the shear ring 5 cuts the shear pin 6, it moves downward into the third step hole 22 until the seat ring of the ball seat 3 is pushed into the preset expansion groove 11. The pawl of the ball seat 3 opens, contacting and restricting the support of the steel ball 7. The steel ball 7 can also smoothly enter the lower oil pipe through the ball seat 3, thereby opening the passage. At this time, the short section composed of the upper connector 1 and the lower connector 2 becomes a full-bore structure.

Claims

1. A packer ratchet ball seat, characterized in that: The assembly includes an upper connector (1), a lower connector (2), a ball seat (3), a retaining ring (4), a shear ring (5), and a shear pin (6). The upper connector (1) and the lower connector (2) are sealed and fixedly connected. The upper connector (1) has a first through hole (10), a reaming groove (11), and a first stepped hole (12) coaxially arranged inside. The lower connector (2) has a second through hole (20), a second stepped hole (21), and a third stepped hole (22). The ball seat (3) has a third through hole. The ball seat (3) abuts against the stepped surface of the first stepped hole (12). The necked section (30) of the ball seat (3) is located in the reaming groove (10). 11) Inside, the retaining ring (4) is fixedly installed inside the second step hole (21). The right end of the ball seat (3) and the shearing ring (5) are slidably installed inside the retaining ring (4). The shearing ring (5) is fixed to the retaining ring (4) by the shearing pin (6). The ball seat (3) is provided with a steel ball (7) for sealing the left end of the third through hole. The ball seat (3) is provided with a long strip hole (31) connected to the third through hole in a ring array. The left end of the ball seat (3) is provided with a slit (34) extending to the center of the long strip hole (31) in a ring array. The shearing ring (5) can be pushed into the third step hole (22).

2. The packer pawl ball seat according to claim 1, characterized in that: The right end of the ball seat (3) is configured as a frustum sleeve structure.

3. The packer pawl ball seat according to claim 1, characterized in that: The right end face of the enlarged groove (11) is set as a limiting inclined surface (13) that matches the necked section (30) of the ball seat (3).

4. The packer pawl ball seat according to claim 1, characterized in that: The upper connector (1) presses and fixes the retaining ring (4) in the second step hole (21) of the lower connector (2) at the right end.

Images