Electric salvage device

Abstract

An electric salvage device comprises clamping jaws, a pull rod, a salvage cylinder body, a lower adaptor, pins, compressed springs, a protective cylinder, a screw, a fixing threaded sleeve, a sheath, a planetary speed reducer, a direct-current motor and an upper adaptor. The upper adaptor is in threaded connection with the sheath, the sheath is in threaded connection with the lower adaptor, the lower adaptor is in threaded connection with the inner periphery of the salvage cylinder body, the outer periphery of the salvage cylinder body is in threaded connection with the upper portion of the protective cylinder, the inside of the sheath is provided with the direct-current motor, the planetary speed reducer and the fixing threaded sleeve from top to bottom, the peripheral side of the lower portion of the protective cylinder is provided with four symmetric clamping jaw grooves, the four clamping jaws connected through the pins are arranged in the clamping jaw grooves, the compressed springs are arranged between the upper portions of the clamping jaws and the protective cylinder, center holes are formed in the fixing threaded sleeve, the lower adaptor and the salvage cylinder body respectively, the screw and the pull rod are arranged in the center holes, the screw and the pull rod are in threaded connection, the pull rod extends to the inner upper portion of the clamping jaws, the direct-current motor is connected with the planetary speed reducer, and the planetary speed reducer is connected with the screw, and therefore the electric salvage device is formed.

Description

technical field [0001] The invention relates to an electric fishover device, which solves the problem of difficulty in fishing for falling objects in wells. Background technique [0002] In the process of oilfield production logging testing and logging, accidents such as instrument dropping and jamming are often encountered. Then it is necessary to specially run in a fishing tool to fish the falling instrument. Because the inner diameter of the downhole string is different, the direct size of the fishing tool is determined according to the minimum diameter of the fishing tool. In particular, the upper part of the pipe string has a small diameter and the lower part has a large diameter, and the falling instrument is easy to deviate to one side, resulting in a small diameter of the fishing tool in the downhole, which is not easy to cover the salvaged object, and often results in fishing failure. Because fishing tools are all mechanical, the diameter of the fishing head cannot...

AI Technical Summary

Problems solved by technology

In particular, the upper part of the pipe string has a small diameter and the lower part has a large diameter, and the tools that fall into the well tend to deviate to one side, resulting in the small diameter of the fishing tools in the well, and it is not easy to cover the salvaged objects, which often leads to fishing failures

Because the fishing tools are all mechanical, the diameter of the fishing head cannot be changed, so the success rate is low

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