发明名称 DOWNHOLE PULSE GENERATING DEVICE FOR THROUGH-BORE OPERATIONS
摘要 A downhole tool comprises a housing having a longitudinal bore and an agitator assembly disposed within the longitudinal bore of the housing. A removable component is disposed within the longitudinal bore and can be removed from the housing so as to at least partially open the longitudinal bore.
申请公布号 EP2925950(A4) 申请公布日期 2016.01.20
申请号 EP20130859402 申请日期 2013.11.26
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 GILLEYLEN, RUSSELL;GHANSYAM, HARESH;STREATER, JAMES R., JR.;SETLUR, DEEPTHI;KITCHING, ALAN H.;WAAS, SHIRAN;GILBERTSON, MURRAY
分类号 E21B4/02;E21B28/00;E21B31/00;F03B13/02 主分类号 E21B4/02
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