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US 4,790,933 AGranted
Dynamic filtration unit and process of use
AssigneeMobil Oil Corporation
InventorsM. Scott Quigley, Henry A. Seal
Life of this patent
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Abstract
A dynamic filtration unit for drilling and completion fluids employs an adjustable size annulus, high filtration pressures and temperatures, automatic filtration collection and measurement, and natural or artificial filters.
Claims5
A drilling and completion fluid circulating unit comprising (1) means for mixing such fluids;
- (2) means for aging the mixture;
- and a closed circuit connected to said mixing and aging means including (3) accummulator means for maintaining pumping pressure above the vapor pressure of said fluids said accumulator means leading to (4) means for pumping said fluid mixture in a circulating path through said unit having therein (5) temperature control means;
- and (6) means for measuring the viscosity of said fluids leading to (7) dynamic filtration means with an adjustable annulus means having multiple hollow cylindrical filters located centrally inside multiple vertical pressure housings;
- and
- multiple vertical collection tubes attached to said filters;
- wherein each of said hollow cylindrical filters have a different outside diameter and leading therefrom back to said accumulator/pumping means.
3 more elements
Dependencies are inferred from the claim text.