Cementing device salvage device

Abstract

A cementing device salvage device is composed of a lifting short section, an inner tube body, an upper tube body, a steel ball, a movable ring, a movable pin, a lower tube body, a conical body, a spring, a sliding sleeve, screws, a push rod, a slip and a guiding tapered mill which are arranged from top to bottom. The lifting short section is in threaded connection with the inner tube body, and thelower end of the lifting short section is provided with a U-shaped clamping groove which is clamped into a T-shaped clamping groove of the upper tube body in a matched mode. The upper tube body is inthreaded connection with the lower tube body, and a bearing set is pressed into the threaded connecting position. The movable pin in the bearing seat moves in a long-short groove in the outer side ofthe inner tube body, thus the conical body is in threaded connection with the inner tube body. The spring, the sliding sleeve, the push rod and the slip are arranged on the outer side of the conicalbody from top to bottom, the push rod is connected with the sliding sleeve and the slip through the screws, and the guiding tapered mill is in threaded connection with the lower tube body. After cementing well completion, all assemblies in an inner cavity can be subjected to salvage to get out from a wellhead by using the cementing device salvage device, the well building period is shortened, thewell cementing quality is improved, and the situation that subsequent tool lowering for measure work is not influenced by the dimension of the drift diameter in a sleeve is guaranteed.

Description

technical field [0001] The invention relates to a fishing tool for well completion operation in an oil field, which is suitable for the fishing operation after the top of the screen is cemented and completed, and belongs to the technical field of fishing with a cementing device without a drill plug. Background technique [0002] With the continuous improvement of oilfield drilling and completion technology, the required completion tools are also continuously improved and innovated. The screen top cementing completion method is a completion operation method in which the screen and casing are used together: the casing part is located in the upper non-oil layer; the screen part is located in the lower oil layer. When cementing the well, use the cement injector to inject cement in the outer annular space of the casing part. After the cementing is completed, it is necessary to clean the inner parts of the cement injector and the blind plate and ensure the inner diameter, so as t...

AI Technical Summary

Problems solved by technology

The plug-drilling cementing device is run into the drilling and sweeping tool again after the cementing is completed to drill the plug. The disadvantage of this method is that it is time-consuming and laborious, and the vibration generated during drilling the plug affects the cementing quality.

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