Rotary seal loading process and device for minor repair work

Abstract

The invention discloses a rotary seal loading process and device for minor repair operations. The device comprises a rotary sealer, a platform, a lifting cylinder, and a rotary clamp. The rotary sealer is connected with a casing at the wellhead through a four-way connection, and the platform is fixed On the ground, the lower part of the lifting cylinder is connected to the platform, and the rotating clamp is connected to the upper part of the lifting cylinder. The invention utilizes the minor repair equipment to realize the major repair function, solves the shortcomings and deficiencies of the minor repair screw drilling tools, can effectively increase the drilling torque, improve the operation speed, reduce the operation cost, and improve the adaptability of the technology.

Description

technical field [0001] The invention relates to operating equipment for oil exploitation wells, in particular to a rotary seal loading process and device for minor repair operations. Background technique [0002] In the middle and late stage of oilfield development, various production techniques and maintenance operations for oil and water wells are increasing. Due to factors such as casing deformation, sand production, wax deposition and pipe string bending deformation in old oilfields, oil and water wells need to be plugged during maintenance. Therefore, the construction process needs to carry out processes such as drilling plugs under pressure, sleeve milling, salvage, etc., and the maintenance workload is large. [0003] The implementation of channeling and leakage blocking, casing grinding, milling and salvage, and drilling plugs in abandoned wells all require pipe string rotation and pressure lifting. Oilfields generally use screw drilling tools for overhaul operations...

AI Technical Summary

Problems solved by technology

[0002] Oilfield development has entered the middle and later stages, and various production process measures and maintenance operations of oil and water wells have been increasing. Due to factors such as casing deformation, sand production, wax deposition, and pipe string bending deformation in old oilfields, it is necessary to plug and channel channeling during maintenance of oil and water wells. Therefore, the construction process requires drilling plugs under pressure, sleeve grinding and milling, salvage and other processes, and the maintenance workload is large

[0003] Pipe string rotation and pressurization are required to implement plugging, casing milling, fishing and plugging in abandoned wells. Oilfields generally use screw drilling tools for overhaul or minor overhaul operations. Problems existing in the current technology: (1) Overhaul operations The cost is high; (2) screw drilling tools are used for minor repairs. When the shallow plug is used, the drilling pressure cannot be applied, and the screw drilling tools cannot drill; in the inclined well section, the drilling tool will be partially idling due to the influence of the well body; Unclear pressure, unable to construct under pressure

[0004] After retrieving the patent documents, it is basically the screw drilling tool, so the technical problems to be solved by the present invention cannot be solved by the prior art

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