Pipe scraper

Details Pipe scraper Pipe scraper

1987-04-22

1989-01-17

Massie, Jerome W.

Wells

Processes

Cleaning or unloading well

166173, 1510405, 134 23, E21B 3702, B08B 902

Patent

active

047982462

ABSTRACT:
A scraper for pipe is provided with scraper blades having arcuate scraper surfaces projecting therefrom with the blades movable radially between a contracted and expanded position which provides a first minimum diameter of the scraper surfaces in contracted position and a second maximum diameter when in expanded position which extends at least to the maximum internal pipe diameter, and an adjustment arrangement which enables said arcuate scraper blades to be adjusted radially to maintain said first and second diameters as the scraper surfaces wear.

REFERENCES:
patent: 2811210 (1957-10-01), Guillot
patent: 3032114 (1962-05-01), Best
patent: 3251418 (1966-05-01), Condra
patent: 3326294 (1967-06-01), Neilson
patent: 4189000 (1980-02-01), Best
patent: 4291764 (1981-09-01), Pampell
patent: 4558738 (1985-12-01), Howard, Sr.
patent: 4648447 (1987-03-01), Bishop et al.

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