Water-injection clay plug process and apparatus

Abstract

The invention discloses a kind of flooding clay plug process and the device, the process includes: (A) puts the pulp supporting device to the lower part of the flooding clay plug; (B) pours cement into the well; (C) waits for solidification. The step B uses special flooding clay plug device, and puts the cement pulp into the device, and it is transmitted to the preset position in the well through steel cable, and it is fixed on in the pipe by the supporting device, opens the device, unloads the cement pulp onto the pulp supporting tool, the flooding clay plug process device includes: weighting pole, steel cable, supporter and rope cap, it also includes pulp carrying pipe, there sets a blocking cap on top of the pulp carrying pipe, the bottom connects to the jamming device base, on which there sets a jamming device that can be dragged up, the top connects to the supporter; the weighting pole is set in the pulp carrying pipe, the top connects to the rope cap, the rope cap connects to the steel cable, the bottom connects to the joint, it connects with fishing device.

Description

1. Technical field [0001] The invention relates to an oil exploitation downhole operation technique and tool, in particular to a cementing piston technique and device. 2. Background technology [0002] The existing cement plugging process in the well is to use the downhole operation equipment to lower the tubing string into the predetermined position in the well, and then use the cement truck to inject the cement from the tubing string into the casing and wait for it to set; Insert a bakelite plug with a diameter slightly larger than the inner diameter of the casing, and then inject cement slurry onto the bakelite plug and wait for it to set. The problems in this plugging process are: [0003] 1. The operation time is long, usually 10-16 hours; [0004] 2. A lot of equipment is needed, such as cement trucks, tank trucks, pump trucks and transportation vehicles, as well as operating machines, lifting and lowering tubing strings, etc.; [0005] 3. The labor intensity of the ...

AI Technical Summary

Problems solved by technology

[0003] 1. The operation time is long, usually 10-16 hours;

[0004] 2. A lot of equipment is needed, such as cement trucks, tank trucks, pump trucks and transportation vehicles, as well as operating machines, lifting and lowering tubing strings, etc.;

[0005] 3. The labor intensity of the operators is high;

[0006] 4. A large amount of oil pipe is required, and the operation cost is high

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