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OIL PRODUCTION VALVE FOR ARTIFICIAL LIFTING
OIL PRODUCTION VALVE FOR ARTIFICIAL LIFTING
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机译:人工举升的采油阀
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摘要
The valve comprises a tubular link incorporated in a drilling line contg. a fluid (mixt). An annular seal and a truncated cone shaped coupling supplement a threaded cut-off rod. The fluid originates in a porous soil medium as a result of multiple drilling operations.
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