An anti-rotation and displacement compensation mechanism of a mechanical external card top drive casing running device

Abstract

The invention relates to the technical field of petroleum machines, in particular to an anti-rotation and displacement compensation mechanism for a mechanical outer clamping top drive casing running device. The anti-rotation and displacement compensation mechanism comprises an anti-rotation assembly and a displacement compensation assembly, wherein the anti-rotation assembly and the displacement compensation assembly both are arranged on one side of a top drive mechanism, and the anti-rotation assembly is arranged at the upper end of the displacement compensation assembly. According to the anti-rotation and displacement compensation mechanism, the displacement compensation assembly is arranged, displacement compensation during makeup of a casing is provided, and the whole upper connectingassembly is not needed to move downwards, so that the resistance during makeup is reduced, the working efficiency is improved, and the service life of the device is prolonged. According to the anti-rotation and displacement compensation mechanism, the self-contained special single lifting ring anti-rotation assembly capable of being rapidly mounted is arranged, so that the working efficiency is improved; and the displacement compensation assembly is arranged, and the anti-rotation and displacement compensation mechanism is suitable for axial movement of the casing running device with the displacement compensation function through the cooperation of rolling wheels and a guide rail.

Description

technical field [0001] The invention relates to the technical field of petroleum machinery, in particular to an anti-rotation and displacement compensation mechanism of a mechanical outer-card top drive casing lowering device. Background technique [0002] The top drive casing running device is a commonly used petroleum machinery, which uses the top drive drilling device for casing running operations. Among them, in order to prevent the casing from rotating during the running of the casing, an anti-rotation structure is used to prevent the rotating of the casing. [0003] The top drive casing lowering device in the prior art still has the following shortcomings when used. First, because there is no displacement compensation mechanism, the displacement compensation when the casing is pulled up cannot be realized, and the entire top drive needs to be moved downward. Increase the resistance when making the buckle; secondly, the anti-rotation mechanism with similar functions in...

AI Technical Summary

Problems solved by technology

[0003] The top drive casing running device in the prior art still has the following deficiencies in use. First, because there is no displacement compensation mechanism, displacement compensation during casing make-up cannot be realized, and the entire top drive needs to move downward Increased the resistance when buckling up; second, the anti-rotation mechanism with similar functions in the prior art (the electric cylinder equipped with a special single lifting ring for the electric drive adopted in the present invention also needs to be equipped with an anti-rotation mechanism that is easy to install). Both installation and fixation need to be removed (it needs to be restored to its original shape after the casing running operation is completed), the lead-in ring (bell mouth) on the top drive back tong, and then the anti-rotation mechanism is fixed on the bolt hole of the original fixed lead-in ring, and the installation work It is cumbersome and affects the installation efficiency, and the non-moving guide rail mechanism is not suitable for the axial movement of the casing running device with displacement compensation function

Images