Casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of casing pipe dislocation horizontal well correction and repair

Abstract

The invention discloses dedicated integration tools of casing pipe dislocation horizontal well correction and repair. The structure comprises a bottom expansion work room, an expansion combination sealing device, a propelling hydraulic cylinder device and a top anchoring device from top to down in sequence, and the bottom expansion work room, the expansion combination sealing device, the propelling hydraulic cylinder device and the top anchoring device are connected. A dislocated casing pipe in a horizontal section of a horizontal well can be corrected and repaired, the shortcoming that an existing dislocated casing pipe in a horizontal section of a horizontal well can not be corrected and repaired effectively is overcome, some abandoned wells and dried-up wells are revived, oil well yield is improved, service life of oil wells is prolonged, and input-output ratio of development cost is improved. The casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of the casing pipe dislocation horizontal well correction and repair is characterized in that two processes of correction and casing pipe repair are combined. The casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of the casing pipe dislocation horizontal well correction and repair omits a process of fixing bottom dislocation casing pipes, avoids secondary pollution of an oil layer, has simple construction process, reduces requirements for construction workers, and is beneficial to popularizing.

Description

technical field [0001] The invention relates to a horizontal well setting and repairing technology, in particular to a setting and repairing method and a special integrated tool for a horizontal well with dislocated casing. Background technique [0002] At present, the large-scale application of horizontal wells has contributed a lot to the stable and guaranteed production of oilfields. However, with the continuous expansion of the application environment and the continuous deterioration of downhole working conditions, some problems that were not considered in the initial promotion have gradually been exposed. The case of casing dislocation in the horizontal section is the most obvious example. This kind of situation has a high probability of occurrence in heavy oil thermal recovery blocks. Since there is no mature repair technology for horizontal wells in the workover field, it is often used in oil wells. It is scrapped ahead of time when it has not reached its service life...

AI Technical Summary

Problems solved by technology

It can correct and repair the broken casing in the horizontal section of the horizontal well, which overcomes the shortcomings of the existing technology that cannot effectively correct and repair the broken casing in the horizontal section, revives some of the dead wells in the abandoned wells, and improves the production of oil wells , prolong the service life of oil wells, and improve the input-output ratio of development costs as much as possible

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