A kind of automatic protective device for oil pipeline and its operation method

Abstract

The invention discloses an automatic protection device for lowering oil pipes, comprising: an elevator mechanism for hoisting oil pipes; a wellhead descaling mechanism including cleaning components, annular blowout preventers, corrosion inhibitor sprayers, The tubing head and casing head, the bottom of the casing head is inserted into the wellhead, and the elevator mechanism is located above the cleaning assembly; the ground protection mechanism, the ground protection mechanism includes a cleaning liquid storage tank, a high-pressure plunger pump, a high-pressure injection pipe, an oil pollution collection tank, Filter, clean water pump, waste liquid recovery pipe, air compressor, corrosion inhibitor liquid storage tank and corrosion inhibitor injection pipe, one end of the high-pressure plunger pump is connected to the cleaning liquid liquid storage tank, and the other end is connected to the cleaning component through a high-pressure injection pipe One end of the clean water pump is connected to the cleaning component through the waste liquid recovery pipe, and the other end is connected to the filter. The filter is also connected to the oil dirt collection tank and the cleaning liquid storage tank. The other end of the corrosion inhibitor liquid storage tank communicates with the corrosion inhibitor sprayer through the corrosion inhibitor injection pipe.

Description

technical field [0001] The invention relates to the technical field of well completion and workover operations, and more specifically relates to an automatic protection device for running oil pipes. Background technique [0002] In oilfield production, the outer wall of the tubing pulled out from the well has a large amount of attachments attached to it. If it is run into the well again without treatment, it will affect normal production. In addition, the corrosion of the outer wall of the tubing is more serious than the corrosion of the inner wall of the tubing. Cleaning the outer wall of the oil pipe will cause corrosion failure of the oil pipe. At present, the commonly used oil pipe descaling technologies are mainly divided into: physical cleaning, chemical cleaning and heating cleaning. Among them, physical cleaning is mainly to realize the cleaning of dirt by applying external force, and the most common method is to apply mechanical friction. Chemical cleaning mainly u...

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Problems solved by technology

[0005] In view of this, in order to solve the technical problems of the oil pipe outer wall cleaning device in the prior art, such as complex structure, inconvenient operation, and low cleaning efficiency, the present invention provides a simple structure, reasonable design, convenient operation, and can be fully realized in the oil field. While cleaning the outer wall of the oil pipe on site, the dirt on the outer wall of the oil pipe is cleaned, and the automatic protection device for the lower oil pipe can be provided with timely pre-film protection for the cleaned outer wall of the oil pipe

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