Unclamping device on drilling rod joint

Abstract

The invention relates to an unclamping device on a drilling rod joint, which is characterized by comprising an oil cylinder I (1), a rack (2), a transitional gear (3), a semi-circle gear (4), a locking device (5), a slide block (6), a connecting rod (7) and an oil cylinder II (8), wherein the oil cylinder I (1) is connected with the rack (2) which is engaged with the transitional gear (3) below the rack (2), the transitional gear (3) is engaged with the semi-circle gear (4) below the transitional gear (3), the semi-circle gear (4) is connected with the locking device (5) below the semi-circlegear (4), and the lower part of the locking device (5) is connected with the slide block (6) which is connected with the oil cylinder II (8) through the connecting rod (7). The unclamping device on the drilling rod joint can adjust pressure according to different joints, and has the advantages of strong pressure consistency, accurate torque and high operating efficiency in the operating process.

Description

(1) Technical field [0001] The invention relates to a make-up and break-out device for a drill pipe joint. (2) Background technology [0002] Before the drill pipe joint is welded, make-up and break-out tests must be carried out, so that the thread and bearing surface can be loaded accordingly, and the cooperation of the joint can be tested, thereby reducing the possibility of the thread being pierced by the mud. [0003] Before the present invention was made, the original screw-on and break-out machine would cause many and deep tooth marks on the surface of the drill pipe joint when the screw-on and break-out machine was loosened, and its torque inertia was large. To the torque, the appearance is not beautiful, and it takes a long time, and the work efficiency is low. (3) Contents of the invention [0004] The object of the present invention is to overcome the above disadvantages and provide a make-up and break-out device for drill pipe joints that can adjust pressure ac...

AI Technical Summary

Problems solved by technology

[0003] Before the present invention was made, the original screw-on and break-out machine would cause many and deep tooth marks on the surface of the drill pipe joint when the screw-on and break-out machine was loosened, and its torque inertia was large. To torque, the appearance is not beautiful, and it takes a long time, and the work efficiency is low

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