Well casing cleaning assembly

Details Well casing cleaning assembly Well casing cleaning assembly

1989-05-08

1990-01-09

Dang, Hoang C.

Wells

Brushing, scraping, cutting or punching-type cleaners

Perforation cleaners

166174, E21B 3700

Patent

active

048921459

ABSTRACT:
A well casing cleaning assembly includes a cylindrical mandrel in which a spiral arrangement of transverse drillings is formed each of the drillings receiving a coiled spring intermediate the bases of exteriorly projecting knife blades. A set of arcuate plate segments, provided with vertical slots at each of the drillings, is then secured to the exterior of the mandrel compressing the springs and exposing the blade ends. An upper and lower packing on the mandrel then confines pressurized cleaning fluid.

REFERENCES:
patent: 2212784 (1940-08-01), McCune
patent: 2213926 (1940-09-01), Brandel
patent: 2224412 (1940-12-01), Smith
patent: 2233930 (1941-03-01), Witt
patent: 2464669 (1949-03-01), Brown
patent: 2960709 (1960-11-01), Peaker et al.
patent: 3163227 (1964-12-01), Caldwell
patent: 4671355 (1987-06-01), Strange

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