英汉对照参考资料(9)
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引用本文：林生剑秋.英汉对照参考资料(9)[J].钻探工程,1984,(3):62.
. [J]. Drilling Engineering, 1984,(3):62.
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林生剑秋
中文摘要:MWD todayEastman Whipstock, Inc.'s Pilot tool employs a sole-noid-operated valve to generate negative, or low pres-sure, pulses in the mud stream. The valve, that is nor-mally closed, opens to bypass drilling fluid from the toolbore to the annulus.Power f
 
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