Oil well packer

Abstract

The invention relates to an oil well packer. The lower part of an upper joint is connected with the upper part of an upper inner pipe, a piston is connected with the upper joint through a seat packing pin, and a piston inner hole is matched with the upper inner pipe. A valve seat is arranged below the upper inner pipe and is connected with a lower inner pipe through a release pin, and the lower part of the lower inner pipe is connected with a lower cone. A fishing head is fixed in the lower inner pipe through an unset pin, an unset lock piece is arranged on the lower inner pipe, and the lower part of the fishing head covers the unset lock piece. A rubber tube shaft is arranged below the piston, a rubber tube is sleeved on the rubber tube shaft which is sleeved on the fishing head, a lock ring is arranged on the rubber tube shaft, a lock sleeve is sleeved on the lower inner pipe, and the lock ring and the lock sleeve can be buckled together. An upper cone is arranged below the rubber tube and is suspended onto the rubber tube shaft, and the upper cone, a slips and the lower cone are arranged inside a slips cover. During a downhole and production process, as the unset pin does not bear a force and does not require a big size, an unset force is small and an unset process is easy. The packer has low bearing requirements on an oil pipe, high execution success ratio, and low operating cost.

Description

1. Technical field [0001] The invention is downhole equipment used in oil field wells, and is an oil well packer. 2. Background technology [0002] The existing bridge plug packer and Y445 packer in the oilfield are hydraulically seated and anchored, and then dropped (disconnected from the tubing string), the lower string buckle is pulled up, the pin is broken, and the unsealed pin is unsealed. This type of packer has a large force to lift and break the unsealing pin, and it is difficult to unsealing. The sealing pressure difference of this kind of packer is also large, and high pressure needs to be injected into the tubing to seal, anchor, and release. It is necessary to use tubing that can withstand high pressure to implement this process. Not all tubing can be used on site. Under high pressure, the seat seal pressure is often insufficient, and the seat seal, anchoring, and hands-off processes cannot be completed, and rework is required to replace low-pressure oil pipes, ...

AI Technical Summary

Problems solved by technology

[0002] The existing bridge plug packer and Y445 packer in the oilfield are hydraulically seated and anchored, and then dropped (disconnected from the tubing string), the lower string buckle is pulled up, the pin is broken, and the unsealed pin is unsealed. The force of lifting and breaking the unsealing pin on this kind of packer is large, and it is difficult to unsealing

The sealing pressure difference of this kind of packer is also large, and high pressure needs to be injected into the tubing to seal, anchor, and release. It is necessary to use tubing that can withstand high pressure to implement this process. Not all tubing can be used on site. Under high pressure, the seat seal pressure is often insufficient, and the seat seal, anchoring, and hands-off processes cannot be completed, and rework is required to replace low-pressure oil pipes, which increases operating costs

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