Wells – Brushing – scraping – cutting or punching-type cleaners – On tubing or casing
Patent
1978-06-26
1980-02-19
Pate, III, William F.
Wells
Brushing, scraping, cutting or punching-type cleaners
On tubing or casing
175411, 285422, E21B 3702
Patent
active
041890000
ABSTRACT:
A casing scraper includes an elongated hollow mandrel with upper and lower longitudinally, circumferentially extending receptacles. Scraper blade means formed by a plurality of longitudinally and circumferentially extending scraper blades are provided in each receptacle with resilient means tending to urge each of the scraper blades radially outward from the mandrel. The upper receptacles are circumferentially offset relative to the lower receptacles so that the scraper blade means in the upper receptacles overlap the scraper blade means in the lower receptacles. Hold down rings are provided adjacent the upper end of the upper receptacles and the lower end of the lower receptacles for retaining the scraper blade means in the receptacles and the hold down rings are provided with a cutting metal surface adjacent an end of each ring. A ring fits about the mandrel between the upper and lower receptacles to further aid in retaining the spring loaded blades in position on the casing scraper. The ring is split for assembly and then welded together so it floats on the mandrel, and it is provided with removable portions at each end thereof for access to the scraper blade means in the receptacles for placement and removal thereof.
REFERENCES:
patent: 2128111 (1938-08-01), Woods
patent: 2836251 (1958-05-01), Claypool et al.
patent: 3032114 (1962-05-01), Best
patent: 3158214 (1964-11-01), Wisler et al.
patent: 3338069 (1967-08-01), Ortloff
Hayden Jack W.
Pate III William F.
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