摘要 |
<p>A drill bit includes a floating journal bushing, a seal, a cutter having a seal gland for the seal and a cutter bearing surface proximate to the journal bearing, wherein the cutter bearing surface has a first inner diameter, and a journal, wherein the cutter is rotatably coupled about the journal, wherein the journal bearing is rotatably coupled about the journal, wherein the journal has a seal boss having a first diameter, and a journal bearing surface having a second diameter, and wherein the first diameter is less than the first inner diameter.</p> |
申请人 |
ULTERRA DRILLING TECHNOLOGY, L.P.;CRAWFORD, MICHEAL, BURLE;NUNLEY, PELE, JASON;FLAK, RICHARD, AUGUST |
发明人 |
CRAWFORD, MICHEAL, BURLE;NUNLEY, PELE, JASON;FLAK, RICHARD, AUGUST |