TECHNOLOGY Solvent removes downhole NORM-contaminated BaSO 4 scale

W.G.F. Ford Halliburton Energy Services Duncan, Okla. L.L. Gadeken Halliburton Energy Services Houston T.J. Callahan Halliburton Energy Services Grande Prairie, Alta. D. Jackson Pan Canadian Petroleum Ltd. Calgary A research project in Canada recently demonstrated that a solvent can remove barium sulfate (BaSO4) scale contaminated with NORM from wells. The solvent dissolves the BaSO4 scales, and all radioactive material is left downhole, eliminating costly NORM disposal. Each year, scale precipitation costs operators millions of dollars in maintenance, treatment, and lost production. Scale contaminated with naturally occurring radioactive material (NORM) creates further pr...

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