Unitized pig body for parafin removal

Details Unitized pig body for parafin removal Unitized pig body for parafin removal

1985-05-03

1986-08-05

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

B08B 904

Patent

active

046034498

ABSTRACT:
Parafin scrapping, disc equipped, unitized pigs are disclosed. The leading disc is undergage by 0.01 to 0.05" and has a durometer of 85 to 95. N scrapper discs are included and have hardness between 65 and 75, and are overgage by a specific size. The pig is equipped with a rear disc similar to the leading disc.

REFERENCES:
patent: 3685083 (1972-08-01), Jones
patent: 3857132 (1974-12-01), Knapp et al.
patent: 3939519 (1976-02-01), Muirhead

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