CUTTING WASH APPARATUS AND METHOD
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United States of America Patent
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Issued Date -
Dec 20, 2012
app pub date -
Nov 27, 2010
filing date -
Nov 30, 2009
priority date (Note) -
Abandoned
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Abstract
Cutting wash apparatus includes a wash tank (11) having side walls (15) converging to an inclined lower floor (16) and containing an air agitated wash solution including a surfactant. A cyclone separator (27) receives an oil-based mud and cutting-containing slurry through inlet (30), passing mud to an outlet (31) and a cuttings-rich component to the wash tank (11). A skimmer (13) removes wash overflow and a mud and slurry fines raft floated by the agitation, and passes this to a separator (18). Separated wash liquid is aerated and returned by pump (19) to injection points (28, 29) to recycle wash and provide the agitation. An auger (23) operates in a casing (21) opening into the tank (11) and extending upward of the wash tank and having an upper end discharge outlet (38). Additional aeration and agitation air is injected through air injection bars (45).
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