发明名称 Triangular oil well drill bit for use in unconsolidated formations
摘要 A drill bit for use in unconsolidated formations includes a generally triangular cross-section that tapers toward the lower tip end of the tool. The vertices of the triangular cross-section carry blade members that cut and define the size of the bore hole. Nozzles positioned between the blades and upon the tapered portion of the tool break up unconsolidated formation material that has been cut.
申请公布号 US4819747(A) 申请公布日期 1989.04.11
申请号 US19870077612 申请日期 1987.07.24
申请人 WALTON, PAUL G.;LITTLE, PERCY A. 发明人 WALTON, PAUL G.;LITTLE, PERCY A.
分类号 E21B10/26;E21B10/54;E21B10/60;(IPC1-7):E21B10/26 主分类号 E21B10/26
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