Liquid purification or separation – Processes – Including geographic feature
Patent
1982-04-12
1983-07-26
Castel, Benoit
Liquid purification or separation
Processes
Including geographic feature
210774, 210180, 210182, 210197, 210806, 210901, 175 66, C02F 104, E21B 2106
Patent
active
043953387
ABSTRACT:
A method and system for dewatering a reserve pit at the drilling site of an oil or gas well. The pumpable waste sludge, including some bit cuttings, spent drilling mud, hydrocarbons and miscellaneous liquid wastes are first pumped from the pit into a holding tank. In the holding tank, sediments and solid particles are separated from the liquid content of the sludge. The liquid is then pumped into a high temperature boiler to separate the water, as steam, from salt and other water soluble solids and from heavy hydrocarbons. Separated solids are returned to the reserve pit. On completion of the process, the pit contains no unacceptable environmental contaminants and a minimal quantity of liquid. It is then earth filled to restore the topography to near its original condition. The apparatus employed in the invention includes a pump which is connected in a hose extending between the reserve pit and a holding tank. Another pump is connected between the holding tank and a boiler. Conveyor apparatus is provided for returning solids from the points of separation to the reserve pit.
REFERENCES:
patent: 4139462 (1979-02-01), Sample, Jr.
patent: 4209381 (1980-06-01), Kelly, Jr.
patent: 4234421 (1980-11-01), Dover, Jr.
patent: 4366063 (1982-12-01), O'Connor
European Patent Application 0005273; "Apparatus and Method for Removing Hydrocarbons from Drill Cuttings"; Nov. 1979.
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