Novel hairbrush pipe scraping device

Abstract

The invention discloses a novel hairbrush pipe scraping device. The novel hairbrush pipe scraping device comprises a mandrel and a lower connector connected with the lower end of the mandrel, wherein a hairbrush sleeve sleeves on an outer wall of the mandrel; three rows of hairbrushes are uniformly distributed on the outer wall of the hairbrush sleeve; an upper strengthening sleeve and a lower strengthening sleeve are arranged at two ends of the hairbrush sleeve respectively; the hairbrush sleeve is in clamping connection with a second clamping groove in the lower end of the upper strengthening sleeve and a third clamping groove in the upper end of the lower strengthening sleeve through first clamping grooves at two ends respectively; meanwhile, a fourth clamping groove is formed in the lower end of the lower strengthening sleeve; a fifth clamping groove, matched with the fourth clamping groove, is formed in the upper end of the lower connector; and an anti-clamping device is arranged between the fourth clamping groove and the fifth clamping groove. The novel hairbrush pipe scraping device provided by the invention is simple in structure, low in manufacturing cost and long in service life; and an anti-clamping problem of the hairbrush pipe scraping device is effectively solved and occurrence of downhole accidents is prevented.

Description

technical field [0001] The invention relates to a new type of brush scraping device, which is used to remove residual cement and mud on the inner wall of downhole casing, as well as rust, scale, hard paraffin and other sundries on the casing of production wells that affect normal construction operations, belonging to offshore Oil field drilling technology field. Background technique [0002] The traditional brush scraper has a complex structure and high rigidity, and it is easy to get stuck with the casing in poor working conditions, resulting in downhole accidents, and there is no preset structure for post-clamping release. In addition, the bristles of the traditional hair brush scraper are easy to fall off, so the service life is relatively short. SUMMARY OF THE INVENTION [0003] In order to solve the technical problem that the existing brush scraper has a complicated structure and high rigidity, and is easy to get stuck with the casing with bad working conditions, res...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the existing brush scraper has a complicated structure and high rigidity, and is easy to get stuck with the casing with bad working conditions, resulting in downhole accidents, and there is no preset structure for subsequent jam release, the present invention provides A new type of brush scraper device has been developed. The brush scraper not only has simple structure, low manufacturing cost and long service life, but also effectively solves the problem of anti-jamming of the brush scraper and avoids underground accidents.

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