External thread petroleum machinery workpiece protective cover convenient to install

Abstract

The invention discloses an external thread petroleum machinery workpiece protective cover convenient to install. The external thread petroleum machinery workpiece protective cover convenient to install comprises a protective cover body, and the protective cover body comprises an upper cover body and a lower cover body. The upper cover body comprises an end cover and a first convex plate, an oil plug hole is formed in the side edge of the end cover, threads are arranged on the inner wall of the oil plug hole, an oil plug bolt is installed in the oil plug hole, and the oil plug hole is connectedwith the oil plug bolt through the threads. The first convex plate is arranged on the side edge of the end cover, a counter bore is formed in the end, away from the end cover, of the first convex plate, threads are arranged on the inner wall of the counter bore, and the counter bore is connected with an external thread workpiece through the threads. Symmetric oil guide holes are formed in the side edge, close to one end of the end cover, of the first convex plate, the lower cover body is arranged on the side, close to the first convex plate, of the upper cover body, a first through hole and asecond through hole are correspondingly formed in the two ends of the lower cover body in sequence, and the first through hole communicates with the second through hole. The external thread petroleummachinery workpiece protective cover convenient to install has a good protective effect on the external thread workpiece and has functions of preventing loosing and falling off, the installation is quite convenient, and the strength is quite high.

Description

[0001] This application is a divisional application with application number 2016110645242, application date on November 28, 2016, and the title of invention "An external thread protective cover for petroleum machinery workpieces that is easy to install". technical field [0002] The invention relates to the technical field of petroleum machinery, in particular to a protective cover for an external thread petroleum machinery workpiece which is easy to install. Background technique [0003] Among the parts of petroleum machinery, especially in underground tools, most of the workpieces are cylindrical as a whole, such as screw drilling tools, jars while drilling, super jars, conventional coring tools, hydraulic accelerators, salvage Cup, strong magnetic overshot, salvage male cone, salvage female cone, reverse circulation salvage blue, retractable slip overshot, lifting sub, integral short drill pipe, kelly plug valve, arrow-shaped back pressure valve, Drill stabilizers, etc., ...

AI Technical Summary

Problems solved by technology

[0004] Among them, for these workpieces with external threads, compared with the overall size of the workpiece, the thickness of the external threads at both ends and the width of the external threads are small. Therefore, during the maintenance and transportation of the workpieces after forming, all The external thread of the workpiece needs to be carefully protected to prevent the external thread from being damaged due to the collision of the workpiece. Once the thread of the workpiece is damaged, the sealing performance will be reduced, and the workpiece cannot be used; and our common protective sleeve is generally a belt The sleeve with internal thread is easy to fall off due to vibration during use, resulting in very bad results and sometimes even causing safety accidents

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