Anti-abrasion device for casing pipe

Abstract

The invention discloses an anti-abrasion device for a casing pipe. The device comprises a rolling ball seat which is of a barrel-shaped structure, the rolling ball seat is arranged outside a pipe body in a sleeving mode, the inner wall of the rolling ball seat is provided with rubber, the outer wall of the rolling ball seat is provided with a support frame in the axial direction, and the support frame is provided with multiple rolling balls, the rolling balls protrude out of the support frame so that rolling can be achieved. According to the anti-abrasion device, the rubber is added to the inner side of a protecting cover, and metal-metal contact damage between the protecting cover and a drill pipe and an oil pipe is avoided; the rolling balls are added to the outer side of the protecting cover, when pipe columns are lifted or descended or vibrated or rotated, sliding friction among the pipe columns can be changed into rolling friction, and thus abrasion of the casing pipe is reduced.

Description

technical field [0001] The invention belongs to the technical field of anti-wear of oil and gas well pipe strings, in particular to a casing anti-wear device. Background technique [0002] During the development and production of oil and gas fields, there are various forms of friction between pipe strings. The main friction form during the lifting and lowering of the pipe string is longitudinal friction; in the drilling process, the main friction form is the circumferential friction between the drill pipe and casing; in the oil and gas production process, the main friction form is the oil pipe and casing friction. Circumferential friction and longitudinal friction. With the increase of time, the wear increases, and the direct consequence is that the casing wears out and fails. [0003] Casing wear will reduce the anti-collapse strength and internal pressure strength of the casing string, resulting in collapse, deformation and leakage of the casing string, and in severe cas...

AI Technical Summary

Problems solved by technology

Based on the wear and tear failure problems of drill pipe and tubing, various anti-wear devices for drill pipe and tubing have been developed. In summary, there are two main types: one is to use rubber to protect drill pipe and tubing, which has poor strength, difficulty in assembly and disassembly, and Disadvantages such as severe displacement and easy breakage and falling off; the other is to add anti-wear pup joints in the middle of the drill pipe. This method cannot effectively improve the longitudinal wear between pipe strings, and increases the time for make-up on the oil field

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