Tubular column cleaning device

Abstract

The invention provides a tubular column cleaning device. The tubular column cleaning device comprises a body and a first cavity; the body extends lengthwise and is provided with a first end and a second end; the first end can be connected with a tubular column; the second end can be connected with a downhole motor; the first cavity is formed in the body, is positioned between the first end and the second end and can be connected with the tubular column; and a first through hole which is connected with the first cavity is formed in a side wall of the body. The first through hole which is connected with the first cavity is formed in the side wall of the body, the first cavity can be connected with the tubular column, so that the tubular column is communicated with annular space, a cleaning passage through which cleaning fluid can flow is formed, the flowing direction of the cleaning fluid can be changed by the cleaning passage, and the purposes of feeding the cleaning fluid in a well from the ground, cleaning the tubular column under the ground and returning the used cleaning fluid to the ground are achieved. Shortcomings that in the prior art, time and labor are wasted, work procedures are complicated, and construction progress is affected when the tubular column is cleaned on the ground, and cleaning efficiency is improved greatly.

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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