Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1993-07-09
1994-10-11
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175374, 175434, E21B 1016
Patent
active
053538854
ABSTRACT:
A rock bit is disclosed having a plurality of rolling cone cutters each having a gage row of inserts oriented to face the borehole bottom for crushing the same, and a second row of heel gage inserts which are oriented to face the borehole sidewall for scraping the same, heel inserts are nestled within the profile of the gage inserts in order to alleviate most of the scraping action normally encountered by gage inserts.
REFERENCES:
patent: 2774570 (1956-12-01), Cunningham
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patent: 4339009 (1982-07-01), Bushy
patent: 4343372 (1980-06-01), Kinzer
patent: 4811801 (1989-03-01), Salesky et al.
patent: 4940099 (1990-07-01), Deane et al.
Crockett David P.
Hooper Michael E.
Dang Hoang C.
Smith International Inc.
Vargo Robert M.
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