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CN109915106A
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A kind of drilling well oil sample taken amount sensing device
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CN109915107A
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A kind of dipping tube road pump discharge pipe cable architecture
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CN109915059A
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A kind of oil pipe righting connection bolt
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CN109916469A
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A kind of liquid level gas gauge
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CN109915060A
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A kind of promotion oil pipe device of downhole hanger
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CN109915064A
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A kind of down-hole centralizing open flow mechanism
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CN109915089A
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A kind of wellhead tree controller control valve door connection structure
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CN109915105A
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Permanent magnetic sensor is used in a kind of well logging
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CN109915042A
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A kind of oil pipe righting connection bolt
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CN109915109A
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Sensing and controlling device is used in a kind of well logging
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CN109915108A
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A kind of electromagnetism oil circuit inlet valve
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CN109915063A
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A kind of well logging Hanging bolt device
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CN109915061A
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A kind of righting boll-weevil hanger
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CN109915062A
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A kind of righting adjusting screw rod hinge connection device
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CN109138890A
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Pumping rod fishing device
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CN109139529A
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Submersible electric pump suction inlet anti-block apparatus
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CN109138963A
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Oil well gas fractionation unit
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CN109138913A
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Oil well sleeve gas monitoring device
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CN109138993A
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Oil well cementing structure simulators
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CN109138912A
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The dedicated anti-blocking blow-out release device of super-viscous oil electric heating oil nozzle
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