Paraffin cleaner

Details Paraffin cleaner Paraffin cleaner

1976-09-30

1977-09-20

Leppink, James A.

Wells

Processes

Dissolving or preventing formation of solid oil deposit

166312, 166325, E21B 3700

Patent

active

040490572

ABSTRACT:
A valve unit is placed in the eduction tube of an oil well. The unit has two valves therein, one to discharge fluid from the eduction tube into the annulus between the tube and the casing and the other to receive fluid from the annulus into the eduction tube. The ball of the valves are held against a seat by cupped or "Belville" washers. The valves are located within an enlarged cylindrical portion of the eduction tube.

REFERENCES:
patent: 2293442 (1942-08-01), Montgomery
patent: 2300348 (1942-10-01), Dana
patent: 2704979 (1955-03-01), Willigen
patent: 2770307 (1956-11-01), Deerdoff
patent: 3014531 (1961-12-01), Weaver
patent: 3085629 (1963-04-01), Henderson
patent: 3102590 (1963-09-01), Grounds
patent: 3361205 (1968-01-01), Waldron
patent: 3376936 (1968-04-01), Tomlin
patent: 4011906 (1977-03-01), Alexander et al.

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