发明名称 MULTI-SET PDC DRILL BIT AND METHOD
摘要 <p>A PDC bit includes a plurality of blades including primary blades and secondary blades. The included primary blades are set with PDC cutters in accordance with a "single set" methodology. The included secondary blades, however, are set with PDC cutters using a type of "plural set" methodology such that the radial positions of cutters on a secondary blade match the radial positions of cutters on a single set primary which is immediately preceding that secondary blade. Plural secondary blades can be positioned to follow a single primary blade, and the cutters on those plural secondary blades will have radial positions matching the cutters of the immediately preceding single set primary blade.</p>
申请公布号 WO2010080535(A1) 申请公布日期 2010.07.15
申请号 WO2009US68573 申请日期 2009.12.17
申请人 VAREL INTERNATIONAL, IND., L.P.;DREWS, STEVEN, W.;MAURSTAD, CARY 发明人 DREWS, STEVEN, W.;MAURSTAD, CARY
分类号 E21B10/36 主分类号 E21B10/36
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