Well clean out apparatus

Details Well clean out apparatus Well clean out apparatus

1987-04-03

1988-01-26

Novosad, Stephen J.

Wells

With junk retrieving means

166301, 1661053, 166109, 166110, E21B 3700

Patent

active

047211563

ABSTRACT:
A well clean out apparatus of the reciprocating pump, recirculating, type has two debris entrapment chambers below and one fluid chamber above the pump. The pump piston has a stack of flat washers to function as piston packing. The washers are axially and radially loose fitting to allow some movement to enable particles to work past each washer to avoid sand jamming. The washer stack, collectively, resists fluid by-pass around the piston. The pump is inverted and fluid flows through the piston rod to increase fluid velocity in the piston vicinity.

REFERENCES:
patent: 1327583 (1920-01-01), Arbon
patent: 2099877 (1937-11-01), Westall
patent: 2141672 (1938-12-01), Taylor
patent: 2166488 (1939-07-01), Gates
patent: 2168729 (1939-08-01), Cavins
patent: 2331631 (1943-10-01), Rogers et al.
patent: 3003562 (1961-10-01), Yates
patent: 3406757 (1968-10-01), Baumstimler
patent: 4190113 (1980-02-01), Harrison
patent: 4421182 (1983-12-01), Moody et al.
patent: 4478285 (1984-10-01), Caldwell
patent: 4493383 (1985-01-01), Williams et al.

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