Dewatering techniques gain foothold in Canada

SOLIDS CONTROL-ConclusionCanadian operators have successively applied dewatering technologies to meet their environmental and operational needs.Often called "sumpless drilling" or "chemically enhanced centrifugation," this technology forms the last phase in a near closed-loop system (NCLS) in which chemically driven flocculation processes, operating in conjunction with decanting centrifuges, completely separate sand, silt, and colloidal solids from the liquid phase.Once separation takes place, undesirable solids can then be expelled with other wastes while returning clean effluent to the additions section for drilling-mud reformulation (see Part 2 Solids Control, OGJ, Sept. 4, 2000, p. 40...

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