发明名称 DOWNHOLE CUTTING TOOL
摘要 A tool for reaming a borehole includes a tubular body (101) having a central axis, an uphole reamer section (110) mounted to the body, and a downhole reamer section (130) mounted to the body. Each reamer section includes a first blade extending radially from the body. Each blade has an uphole end, a downhole end opposite the uphole end, and a formation-facing surface. The formation facing surface of the first blade of the uphole reamer section is disposed at a radius R1 that increases moving from the uphole end to the downhole end. The formation facing surface of the first blade of the downhole reamer section is disposed at a radius R1' that decreases moving from the uphole end to the downhole end. The tool also includes a cutter element mounted to the formation facing surface of the first blade of each reamer section.
申请公布号 WO2013101925(A3) 申请公布日期 2014.05.22
申请号 WO2012US71808 申请日期 2012.12.27
申请人 NATIONAL OILWELL DHT, L.P.;SILVA, ROGER H. 发明人 SILVA, ROGER H.
分类号 E21B10/30;E21B17/10 主分类号 E21B10/30
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