Terry Hurst Chevron U.S.A. Production Co. Snyder, Tex. Robert W. Lannom, David L. Divine E.S.P. Inc. Midland, Tex. Routine maintenance of electric submersible motors (ESPS) significantly lengthened the mean time between motor failures (MTBF), decreased operating costs, and extended motor run life in the Sacroc Unit of the Kelly-Snyder field in West Texas (Fig. 1). After the oil price boom of the early 1980s, rapidly eroding profit margins from producing properties caused a much stronger focus on reducing operating costs. In Sacroc, ESP operating life and repair costs became a major target of cost reduction efforts. ...

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