Workover operation refers to an operation of care and maintenance measures for oil drilling and subsequent well maintenance to ensure suc

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Casing repair in open hole, and casing repair in cased hole.

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Importation and improvement of fishing tools of rope-like fishes, such as: complex-type outer hooks of milling and fishing, high-strength lo

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The main technical problem of horizontal well workover are: large friction, easily lead to weight indicator distortion, tension and torque i

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In the process of oil extraction, the polymer in the oil layer and solid particles and other substances carried by crude oil will, as time g

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