Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts
作者： Jr. James M. Shamburger
DOI:
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摘要: A drill bit (10) includes at least two truncated conical cutter assemblies (20) rotatably coupled to support arms (18). The are frusto-conical or frustums in shape, with a back face (60) connected flat (22, 62) by sides. Primary cutting elements (24) arranged predetermined pattern on the 62). teeth (26) of spaced from other (20). primary cut around core rock formation (40) center borehole, which acts stabilize and urges them outward full-gage borehole. Secondary (52) mounted downward surfaces dome area (50). secondary down free-standing (42) when advances.
lens.org 参考文章(50)
Eduardo Barnetche-Gonzalez, Double cone cutting head for a drill bit ,(1989)
Gary Portwood, Gilbert S. Tyner, Roger P. Johns, Charles R. Muren, Core cutting rock bit ,(1994)
Lloyd L. Garner, Diamond cutter rock bit with penetration limiting ,(1975)
Mahlon D. Dennis, Cutting blank with diamond strips in grooves ,(1984)
Eric F. Drake, Rotary drill bit, parts therefor, and method of manufacturing thereof ,(1984)
Alfred C Catland, John H Howard, Rock core drill head ,(1935)
Gordon A. Tibbitts, Drill bit having diamond film cutting surface ,(1989)
Craig R. Ivie, John D. Deane, Percy W. Schumacher, Cutting elements for roller cutter drill bits ,(1989)
Charles R. Harris, William Baker, Longitudinal axis roller drill bit with gage inserts protection ,(1978)
Lester S Hudson, Eugene G Ott, Cutting tool having hard insert in hole surrounded by hard facing ,(1967)