英汉对照参考资料(9)

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

Abstract:

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