Protective cover for external thread petroleum machinery workpiece

Abstract

The invention discloses a protective cover for an external thread petroleum machinery workpiece. The protective cover comprises a protective cover body, wherein the protective cover body consists of a top surface (1) and a side wall (2), is circular table-shaped integrally and has an internal cavity structure; and internal threads matched with external threads of the workpiece are arranged on the side wall (2). The protective cover body is circular table-shaped integrally, the internal threads are arranged inside the protective cover body, and the threads of the protective cover body are embedded into thread pitch of the surface of the workpiece, so that the deformation of the threads in the radial and axial directions can be effectively reduced, and damages to the threads caused by collision of the protective cover can be prevented; stacking rings are arranged at the bottom of the side wall of the protective cover body, so that the protective cover body is convenient to transport and store; stacking platforms are arranged on the stacking rings and can keep the distances among the stacking rings of the protective cover body, so that tools or hands can be conveniently stretched into the protective cover body, and the aim that the protective cover body is convenient to separate is fulfilled; and an oil injection hole is formed on the top surface of the protective cover body, so that the workpiece can be conveniently maintained for a long time.

Description

technical field [0001] The invention relates to a workpiece protection device after steel processing, in particular to a protective cover for petroleum mechanical workpieces with external threads. Background technique [0002] Among the components of petroleum machinery, especially in underground tools, most of the workpieces are cylindrical as a whole, such as screw drilling tools, while drilling jars, super jars, conventional coring tools, hydraulic accelerators, salvage cup, strong magnetic overshot, fishing male cone, female fishing cone, reverse circulation fishing blue, retractable slip overshot, lifting nipple, integral short drill pipe, kelly cock valve, arrow back pressure valve, Drilling tool stabilizers, etc., the above workpieces are all made of forged blanks through machining, and both ends or one of the formed workpieces have internal or external threads. Among them, the screw drilling tool is a volumetric downhole power drilling tool that uses drilling fluid ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the external threads of the cylindrical workpieces of petroleum machinery are easily damaged during transportation and storage after processing, and provide a protective cover for petroleum machinery workpieces with external threads

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