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  • What's new in artificial lift?


    J. F. Lea, H. W. Winkler, R. E. Snyder and P. O. Oyewole

    Part 1, presented last month, described 19 recent downhole and surface equipment developments in three categories: sucker rod pumping; Progressing Cavity Pumping (PCP); and gas lift. This concluding article discusses recent equipment technology introduced and applied for installing and more efficiently operating and maintaining Electric Submersible Pump (ESP) systems. Also covered are miscellaneous new developments including: new hydraulic pumps; improved thermal recovery with steam; updated chemical injection; and fluid level and pump-off control technology. ELECTRIC SUBMERSIBLE PUMPS Described here are eight new systems: a low-flow, low-horsepower ESP; a low-cost cable clamp; an automatic bypass sub; a flapper-type fluid loss valve; new power cables; a variable-speed drive; downhole ESP monitoring; and an ESP assembly cap. Low-flow, low-power ESP. Baker Hughes Centrilift has developed a low-flow, low-horsepower ESP system designed for wells up to 6,000 ft deep with flowrates up to 400 bpd and horsepower requirements up to 40 hp.

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