Protection device for sealing working face of petroleum downhole tool

Abstract

The invention discloses a protection device for a sealing working face of a petroleum downhole tool. The protection device comprises a pair of hoop bodies (1); each hoop body (1) is tile-shaped; the pair of hoop bodies (1) are combined to form a cylindrical hoop; one side edges of the pair of clamp bodies (1) are hinged through a pair of hinge devices (2), and the other side edges of the pair of clamp bodies (1) are rapidly connected through a pair of plug pin devices (3); a supporting semi-ring (4) is arranged on the inner arc surface of each hoop body (1); and a rubber pad (5) is arranged onthe inner ring surface of each supporting semi-ring (4). According to the protection device, the hoop bodies are made of steel pipe materials, the problem of environmental pollution caused by plasticproducts is solved, the rubber pads are made of small corrosion-resistant face materials, the problem of resource waste is effectively solved, the rubber pads can be repeatedly used, the corrosion-resistant faces are easy to replace, operation is easy, and the cost is low; and by replacing rubber pads with different thicknesses, the protection of sliding grinding and assembling surfaces of various downhole tools can be met, and the purpose of one tool with multiple functions can be achieved.

Description

technical field [0001] The invention relates to a protection device for the sealing face of an oil well tool, belonging to the technical field of drilling equipment protection. Background technique [0002] The working faces of most petroleum downhole tools are sliding grinding surfaces, and the use of downhole tools is mainly concentrated on this working face. Since part of the grinding surface is exposed on the outside of the tool, all transportation and storage before going into the well need to be protected from scratches. [0003] The protection device of the existing working surface is an integral component made of plastic materials. The mold structure design of the existing protection device is complex, and the long-term molding process is easy to damage the mold, and the maintenance cost of the mold is relatively high; the amount of plastic raw materials used is relatively large. It is not conducive to environmental protection; after repeated use, the plastic protec...

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Problems solved by technology

[0003] The protection device of the existing working surface is an integral component made of plastic materials. The mold structure design of the existing protection device is complex, and the long-term molding process is easy to damage the mold, and the maintenance cost of the mold is relatively high; the amount of plastic raw materials used is relatively large. It is not conducive to environmental protection; after repeated use, the plastic protection device needs to be replaced as a whole, resulting in a large waste of resources; it cannot meet the use of grinding surface protection of various specifications

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