发明名称 PURGING FLUID CIRCUITS IN WELLBORE CONTROL DEVICES
摘要 The disclosure relates to purging a RCD including a bearing of contaminants with a fluid circuit, the fluid circuit having at least one housing adjacent to the RCD, a first plurality of valves within the bearing, a second plurality of valves within the housing, at least one inlet port located on the RCD, each inlet port being connected to the housing, at least one outlet port located on the RCD, each outlet port being connected to the housing, and a purge outlet in fluid communication with the fluid circuit.
申请公布号 WO2014145611(A2) 申请公布日期 2014.09.18
申请号 WO2014US30406 申请日期 2014.03.17
申请人 WEATHERFORD/LAMB, INC. 发明人 GRAY, KEVIN L.;BAILEY, THOMAS F.;CHAMBERS, JAMES W.
分类号 E21B33/08 主分类号 E21B33/08
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