Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent
1991-02-12
1992-02-25
Bui, Thuy M.
Boring or penetrating the earth
Bit or bit element
Plural separable cutter elements
E21B 1046
Patent
active
050904922
ABSTRACT:
A rotary drill bit for drilling subterranean wells comprises a plurality of radially adjacent cutting elements disposed in angularly spaced relationship on the end face of the drill bit. Behind each set of cutting elements, at least one stabilizing projection is formed on the drill bit. Such projection is of peripherally elongated configuration and is circumferentially aligned with one of the cutting elements so as to snugly enter and engage the side walls of the formation groove produced by the aligned cutting element, thus providing substantial resistance against lateral displacement or vibration of the drill bit.
REFERENCES:
patent: 4602691 (1986-07-01), Weaver
patent: 4640375 (1987-02-01), Barr et al.
patent: 4718505 (1988-05-01), Fuller
patent: 4889017 (1989-06-01), Fuller et al.
S.P.E. Paper #19572, Oct. 1989.
Bui Thuy M.
Dresser Industries Inc.
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