Process and apparatus for filtration of oil and gas well fluids

Details Process and apparatus for filtration of oil and gas well fluids Process and apparatus for filtration of oil and gas well fluids

1984-05-04

1985-12-24

Adee, John

Liquid purification or separation

Processes

Separating

210799, 2103232, 210489, B01D 3702

Patent

active

045604835

ABSTRACT:
A filter system using at least two filter vessels with a plurality of filter elements having absolute filtration capability. The filter elements use a nominal filter of diatomaceous earth, or a Perlite filter aid precoat layer, an outer wire layer, an absolute filter layer, a fine wire layer, a coarse wire layer, and a tube core for receiving filter flow therein. A pump is provided for injecting a predetermined amount of filter aid to a precoat tank containing clean fluid. The slurry of filter aid and clean fluid is then pumped into one of the filter vessels for precoating the filtering elements. The unfiltered fluid is then allowed to enter the vessel and be filtered through the filtering elements while virgin filter aid is continuously injected into the unfiltered fluids prior to the fluids entering the filter vessel. One filter vessel is converted to a cleaning mode while the second filter vessel continues filtering in response to a signal in a differential pressure element. The filter vessels are cleaned by backwashing from a pressurized fluid source. The filter vessels are alternately backwashed and coated with the precoating filter aid to provide for a continuous filtering operation.

REFERENCES:
patent: 4269707 (1981-05-01), Butterworth et al.
patent: 4388197 (1983-06-01), Lumikko

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