Oil-water well perforating gun pulling device operating under pressure

[0011] The specific embodiments of the present invention are described below in conjunction with the drawings:

[0012] by figure 1 , figure 2 It can be seen that the present invention is composed of a lifting head 1, a blowout preventer body 2, and the lower part of the blowout preventer body 2 is slips. The slips include a slip seat 3 and a slip tooth 4. The inner pipe wall of the slip seat 3 has at least There are two inverted tapered grooves 5, the slips 4 are placed in the grooves 5, and a rotating bearing 6 is installed between the upper part of the blowout prevention cylinder 2 and the lifting head 1.

[0013] The lifting head 1 has a "convex" shape structure; the upper end of the blowout prevention cylinder 2 is provided with a hollow hole that is gap-fitted with the lifting rod of the lifting head 1; the upper end of the blowout prevention cylinder 2 is overlapped with the lifting head through a rotating bearing 6 1 Lower table.

[0014] A plug 7 is fixedly installed at the upper end of the blowout prevention cylinder 1, and the upper part of the plug 7 is lapped on the lower table of the lifting head 1 through a pressure cap 8. The pressure cap 8 and the plug 7 are connected to the lower table of the lifting head 1. Swivel bearings 6 are installed between them.

[0015] A shoe guide 9 is fixedly installed at the lower part of the blowout prevention cylinder 2 to guide the perforating gun into the cavity of the blowout prevention cylinder 2.

[0016] When using pressurized equipment to start the perforating tube to the perforating gun body 10: Use the safety slip below the position of the fully sealed well sealer to jam the perforating gun body 10, and invert the tubing to connect the perforating gun body 10 to the tubing Unbuckle at the place, then take out the oil pipe, close the fully sealed well, open the annular blowout preventer, and then use the moving slips of the pressurized equipment to block the lifting head 1 of the present invention and run the present invention into the well. After the guide shoe 9 passes through the annular blowout preventer, close the annular blowout preventer, open the fully enclosed well sealer, and continue to run the present invention while rotating the blowout preventer body 2 forward, and the perforating gun in the well is set under the action of the guide shoe 9 The body 10 is introduced into the cavity of the blowout prevention cylinder 2 and continues to be lowered into the present invention, so that the perforating gun body 10 is in full contact with the slips 4, and the lifting head 1 is lifted up with the floating slips to make the slips 4 bite tightly Hold the perforating gun body 10, open the safety slip, and continue to mention the present invention. The present invention will drive the perforating gun body 10 in the well to go up together until the guide shoe 9 of the present invention is located between the fully enclosed well sealer and the annular blowout preventer. After a while, use safety slips to clamp the perforating gun body 10 to keep the perforating gun body 10 fixed, lower the present invention, separate the slips 4 of the present invention from the perforating gun body 10, and continue to lower the present invention to shooting When the joint of the gun body 10 is bored, the safety slips of the pressure working equipment are opened, and the present invention is mentioned. The invention is repeatedly raised and lowered according to the steps described, and cooperated with the safety slips of the pressurized operation equipment, so that all the first section of the perforating gun body 10 enters the inside of the blowout prevention cylinder 2 of the present invention, and then the pressurized operation The safety slip of the equipment is stuck in the next section of the perforating gun body 10, and the blowout prevention cylinder 2 is rotated to implement the inverted buckle for the connection thread of the perforating gun body 10. After the plug-in device and the annular blowout preventer are closed, the plug-in device is completely closed, the annular blowout preventer is opened, and the first section of the perforating gun body 10 is raised. The high-pressure fluid in the blowout preventer body 2 of the present invention is blocked by The gap between the tile base 3 and the perforating gun body 10 overflows, avoiding the occurrence of wellhead blowout, and achieving the purpose of safe production.

[0017] Repeat the above steps until the remaining perforating gun body 10 in the well is lifted out.