MATRIX FIXED CUTTER DRILL BITS AND METHODS FOR MANUFACTURING SAME
摘要
A fixed cutter drill bit for drilling a borehole in earthen formations includes a blank assembly and a matrix crown fixably mounted to the blank assembly. The blank assembly includes an annular mandrel and a plurality of elongate studs fixably coupled to the mandrel. The mandrel has a first end distal the crown and a second end engaging the crown. In addition, the mandrel includes a plurality of bores extending axially from the second end. Each elongate stud has a first end disposed within one of the bores and a second end disposed in the crown distal the mandrel.
申请公布号
CA2932167(A1)
申请公布日期
2015.06.18
申请号
CA20142932167
申请日期
2014.12.23
申请人
NATIONAL OILWELL DHT, L.P.
发明人
GARNER, MICHAEL;MARSHALL, JAN EDGAR;SRESHTA, HAROLD A.