Protective cover for internal thread petroleum machinery workpiece
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A technology of petroleum machinery and protective cover, applied in the field of workpiece protection device, can solve the problem of difficult maintenance of threads, and achieve the effect of preventing thread damage and reducing deformation
Inactive Publication Date: 2011-12-14
CHENGDU KESHENG PETROLEUM TECH +1
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[0003] The purpose of the present invention is to overcome the problem that the external threads of the cylindrical workpieces of petroleum machinery are difficult to maintain during transportation and storage after processing, and to provide a protective cover for petroleum machinery workpieces with internal threads
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[0021] Such as figure 1 As shown, the protective cover of the internal thread petroleum mechanical workpiece of the present invention includes a protective cover body, and the protective cover body is composed of a top surface 1 and a side wall 2. An external thread is provided, which matches the internal thread at the end of the workpiece. Four hollow areas 5 are arranged on the top surface 1. The hollow areas 5 run through the top surface 1 and are symmetrical about the center of the top surface 1. The hollow areas 5 The part of the top surface 1 between them is a torsion arm 6; a stacking ring 3 parallel to the top surface 1 is connected to the lower end of the side wall. The stacking ring 3 is annular, and its inner diameter matches the diameter of the bottom of the protective cover body. Three stacking platforms 4 protruding from the stacking ring 3 are arranged on the upper surface of the stacking ring 3 , and the three stacking platforms 4 are evenly distributed on the ...
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Abstract
The invention discloses a protective cover for petroleum mechanical workpieces with internal threads, which includes a protective cover body. The protective cover body is composed of a top surface (1) and a side wall (2), and is in the shape of a circular frustum as a whole. Its internal cavity structure, External threads matching the internal threads of the workpiece are provided on the outer surface of the side wall (2). The invention can effectively reduce the radial and axial deformation of the thread, prevent the thread from being damaged due to collision, and can effectively maintain the internal thread at the same time; the stacking ring is convenient for the transportation and storage of the protective cover body; the stacking platform It can maintain the distance between the stacking rings of the protective cover body, which is convenient for tools or hands to reach between the protective cover bodies; the twist arm between the hollowed out areas is convenient for the disassembly of the protective cover body, and the hollowed out areas are also used as oil injection holes at the same time, which is beneficial Long-term storage, transportation and maintenance of workpieces.
Description
technical field [0001] The invention relates to a workpiece protection device after steel processing, in particular to a protective cover for internal thread petroleum machinery workpieces. 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 as the ...
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