Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1976-09-27
1978-03-07
Purser, Ernest R.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175376, 175372, E21B 908
Patent
active
040774821
ABSTRACT:
A three cone rock bit comprises legs and freely rotating cutters mounted on the same. The angle .alpha. between the projections of the rotational axes of two adjacent cutters on a plane perpendicular to the axis of the bit is more than 120.degree. but less than 170.degree.. A flow nipple to supply drilling fluid is provided in the bit, the outlet thereof being positioned between said two cutters.
REFERENCES:
patent: 2184067 (1939-12-01), Zublin
patent: 3207241 (1965-09-01), Neilson
patent: 3363706 (1968-01-01), Feenstra
patent: 3397751 (1968-08-01), Reichmuth
patent: 3495668 (1970-02-01), Schumacher, Jr.
Ioanesian Jury Rolenovich
Ioannesian Rolen Arsenievich
Konstantinov Leonid Pavlovich
Paly Polikarp Avtonomovich
Vladislavlev Jury Evgenievich
Favreau Richard E.
Purser Ernest R.
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