hydraulic drilling jar
... 液压试验：hydrostatic test 液压式钻井震击器：hydraulic drilling jar 液压式衬管挂：hydraulic-set liner hanger ...
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针对钻井过程中常见的井下卡钻事故，研制了新型全液压式随钻震击器。
In light of the commonly seen downhole breakdown of drilling pipe sticking in the drilling process, the new-type fully hydraulic while-drilling bumper sub was developed.
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