Column cleaning device

Abstract

The pipe string cleaning device provided by the present application includes: a body extending lengthwise with a first end and a second end, the first end can be connected to the pipe string, and the second end can be connected to a downhole power drilling tool; The first chamber between the first end and the second end can communicate with the pipe string, and the side wall of the main body is provided with a first through hole communicating with the first chamber. In this application, by opening a first through hole communicating with the first chamber on the side wall of the body, the first chamber can communicate with the pipe string, thereby communicating with the pipe string and the annular space, forming a cleaning channel for the circulation of the cleaning liquid. The cleaning channel can change the flow direction of the cleaning liquid, realize the purpose of driving the cleaning liquid into the ground, cleaning the pipe string downhole, and returning the cleaned cleaning liquid to the ground, and overcome the time-consuming and laborious process of cleaning the pipe string on the ground in the prior art. The lack of complexity and affecting the construction process greatly improves the cleaning efficiency.

Description

technical field [0001] The application belongs to the technical field of oil and gas drilling and workover, and in particular relates to a pipe string cleaning device. Background technique [0002] During the drilling and workover process, the pipe string is used as a drilling fluid delivery channel, which can provide hydraulic power for the downhole dynamic drilling tool. [0003] At present, screw drilling tools are mostly used in engineering, and the stators of screw drilling tools are mostly made of rubber. However, the rubber has weak pressure bearing capacity, and the drilling fluid is easy to leak, resulting in a drop in hydraulic force and a loss of drilling tool power; and the heat resistance of the rubber is poor, and it is easy to age and tear; Under the action, the rubber may corrode and swell, and this swelling may also be uneven due to the anisotropy of the rubber material, causing the shape of the stator to change. Therefore, in some situations requiring hig...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the pipe string is usually lifted to the ground for cleaning, and then the pipe string is lowered into the casing of the oil and gas well; for longer pipe strings, it is usually necessary to disassemble the pipe string in sections and carry out Sectional cleaning; not only time-consuming and laborious, but also complicated process, which affects the construction progress

In addition, the ground environment is poor. After the pipe string is cleaned, other dirt such as soil or hard stones may still enter the pipe string during the assembly process of the pipe string and the downhole power drilling tool, causing the pipe string to be washed again. Pollution

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