A cable through packer setting auxiliary tool

Abstract

The application discloses a cable-through packer setting auxiliary tool, which comprises an upper joint, a sealing ball, a ball seat and a lower joint, the upper joint is sequentially connected with an outer protection pipe and the lower joint, the ball seat is fixed in the outer protection pipe through a constant-pressure shear pin, and the sealing ball is arranged between a limiting plate in the outer protection pipe and the ball seat; flow grooves are arranged in the limiting plate, the outer protection pipe, the ball seat and the lower joint, and the sealing ball is a soluble metal ball; and the cable-through packer setting auxiliary tool is connected in a production pipe string below the cable-through packer. The cable-through packer setting auxiliary tool is connected in the production pipe string through the upper joint and the lower joint, and the connection is simple, convenient to operate and in line with offshore well control requirements. After well completion, if immediate production is needed, the cable-through packer connected in the production pipe string can be directly set by pressing the well mouth, the setting process and setting construction time of the cable-through packer are reduced and shortened, the time of the marine platform occupied by the cable-through packer setting construction is saved, the construction efficiency is improved, and the production cost is reduced.

Claims

1. A cable through packer setting auxiliary tool, comprising an upper joint (1), a sealing ball (5), a ball seat (6), a limiting plate (2), an outer protective tube (4) and a lower joint (10), characterized in that: The upper connector (1) is sequentially connected to the outer sheath (4) and the lower connector (10). The ball seat (6) is fixed in the outer sheath (4) by a constant pressure shear pin (7). The sealing ball (5) is placed between the limiting plate (2) and the ball seat (6) inside the outer sheath (4). The limiting plate (2), the outer sheath (4), the ball seat (6) and the lower connector (10) are all provided with flow grooves. The sealing ball (5) is a soluble metal ball. The cable packer setting auxiliary tool is connected in the production column below the cable packer. Both ends of the outer sheath (4) are provided with external threads and can be threaded to the upper connector (1) and the lower connector (10). The lower end of the upper connector (1) and the upper end of the lower connector (10) are respectively provided with internal threads that can be connected to the outer protective tube (4), and a connector sealing ring (3) is provided in the inner wall below and above the internal thread section of the upper connector (1) and the lower connector (10). The upper inner circle of the upper connector (1) and the lower outer circle of the lower connector (10) are respectively provided with oil pipe threads that can be connected to the production tubing. The inner cavity of the outer protective tube (4) is a non-uniform diameter inner cavity, and the inner cavity is provided with a limiting plate mounting platform, a sealing ring groove (42) and a locking ring mounting groove (41) from top to bottom. The outer protective tube (4) above the sealing ring groove (42) is a pipe The body is provided with a shear pin mounting hole, and a flow groove is provided in the inner wall below the sealing ring groove (42). A ball seat sealing ring (8) is installed in the sealing ring groove (42); a locking ring (9) can be installed in the locking ring mounting groove (41), and a constant pressure shear pin (7) can be installed in the shear pin mounting hole; the flow groove in the inner wall of the outer protective tube (4) is an axial rectangular groove that penetrates the bottom end of the outer protective tube (4). The inner diameter of the flow groove formed by the flow groove in the inner wall of the outer protective tube (4) is smaller than the inner diameter of the tube body above the flow groove. An inner chamfer is provided at the top of the flow groove in the outer protective tube (4); the locking ring mounting groove (41) in the inner wall of the outer protective tube (4) 1) It is located in the flow groove below the inner chamfer; the ball seat (6) is a cylindrical body, the outer diameter of the ball seat (6) is smaller than the inner diameter formed by the flow groove in the outer protective tube (4), and the inner diameter of the ball seat (6) is smaller than the outer diameter of the sealing ball (5); the outer wall of the ball seat (6) is provided with a flow groove, a shear pin connecting ring groove (62) and a locking ring groove (61) from top to bottom, and a constant pressure shear pin (7) can be inserted into the shear pin connecting ring groove (62); the outer protective tube (4) and the ball seat (6) can be connected through the locking ring (9) installed in the locking ring mounting groove (41) in the outer protective tube (4) and the locking ring groove (61) in the ball seat (6).

2. The cable packer setting auxiliary tool as described in claim 1, characterized in that, The limiting plate (2) is installed between the limiting plate mounting platform of the outer protective tube (4) and the upper connector (1); when the upper connector (1) is connected to the outer protective tube (4), the limiting plate (2) is just clamped between the upper connector (1) and the limiting plate mounting platform; the flow groove in the limiting plate (2) is an axially through hole groove and is evenly distributed in the plate body of the limiting plate (2), and the hole diameter of the flow groove in the limiting plate (2) is set between 2mm and 4mm.

3. The cable packer setting auxiliary tool as described in claim 1, characterized in that, The flow groove in the ball seat (6) is an axial rectangular groove, and its width and number of grooves are different from those of the axial rectangular groove in the outer protective tube (4). The top of the inner cavity of the ball seat (6) is provided with an inner chamfer; the bottom of the outer wall of the ball seat (6) is provided with an outer chamfer.

4. The cable packer setting auxiliary tool as described in claim 1, characterized in that, The upper part of the body of the constant pressure shear pin (7) is provided with a sealing ring and a connecting thread and a plug in the body below the sealing ring. The outer diameter of the plug at the bottom of the constant pressure shear pin (7) is smaller than the outer diameter of the constant pressure shear pin (7) and also smaller than the height of the shear pin connecting ring groove (62) in the ball seat (6). At least three constant pressure shear pins (7) are installed in the outer protective tube (4). The distance from the bottom of the flow groove on the upper part of the ball seat (6) to the top of the flow groove in the outer protective tube (4) is greater than the distance between the locking ring groove (61) in the ball seat (6) and the center line of the locking ring (9) installed in the outer protective tube (4).

5. The cable packer setting auxiliary tool as described in claim 4, characterized in that, The locking ring (9) is a C-shaped ring. The body of the locking ring (9) has a through longitudinal cut with a width between 2cm and 4cm and an inner chamfer at the upper end of the body. The outer diameter of the locking ring (9) installed in the locking ring mounting groove (41) is larger than the outer diameter formed when it is locked in the locking ring slot (61).

6. The cable packer setting auxiliary tool as described in claim 1, characterized in that, The lower inner cavity of the upper connector (1) is a conical cavity with a smaller upper part and a larger lower part. The upper inner cavity of the lower connector (10) is provided with an outer protective tube assembly step and a flow groove. The flow groove in the lower connector (10) is an axial rectangular groove.

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