摘要 |
<p>A drill bit having a bit body, a plurality of blades extending radially from the bit body, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter disposed in one of the cutter pockets, wherein each rolling cutter has a substrate, a cutting face, a cutting edge, and a side surface, and at least one blocker positioned adjacent to each of the at least one rolling cutters on a leading face of the blade, wherein each blocker has a retention end and an attachment end is disclosed. The retention end of each blocker is positioned adjacent to a portion of the cutting face of each rolling cutter to retain the rolling cutter in the cutter pocket and the attachment end is attached to a portion of the blade.</p> |
申请人 |
SMITH INTERNATIONAL, INC.;SHEN, YUELIN;ZHANG, JOHN;BURHAN, YURI;SIRACKI, MICHAEL, A.;NAGARAJ, MAHAVIR;DURAIRAJAN, BALA;MCDONOUGH, SCOTT, D.;CARIVEAU, PETER, THOMAS |
发明人 |
SHEN, YUELIN;ZHANG, JOHN;BURHAN, YURI;SIRACKI, MICHAEL, A.;NAGARAJ, MAHAVIR;DURAIRAJAN, BALA;MCDONOUGH, SCOTT, D.;CARIVEAU, PETER, THOMAS |