Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1987-11-09
1989-04-25
Massie, IV, Jerome W.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175410, E21B 1046
Patent
active
048238929
ABSTRACT:
A rotary drill bit for use in drilling or coring deep holes in subsurface formations comprises a bit body having a shank for connection to a drill string and a plurality of cutting elements mounted at the surface of the bit body. Each cutting element is bonded to a stud which is received in a socket in the bit body. Spaced rearwardly of each cutting element is a separate abrasion element comprising a stud which is received in a socket in the bit body and is impregnated with particles of natural or synthetic diamond. The abrasion element provides a back-up in the event of failure or excessive wear of the cutting element and its spacing from the cutting element prevents the damaging transfer of heat from the abrasion element to the cutting element. The cooling may be enhanced by providing a channel for drilling fluid between the cutting element and abrasion element.
REFERENCES:
patent: 3938599 (1976-02-01), Horn
patent: 4512426 (1985-04-01), Bidegaray
patent: 4554986 (1985-11-01), Jones
patent: 4570726 (1986-02-01), Hall
patent: 4681174 (1987-07-01), Aubakirov et al.
Massie IV Jerome W.
Melius Terry Lee
NL Petroleum Products Limited
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