Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1981-08-31
1983-04-05
Purser, Ernest R.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175 67, E21B 1018
Patent
active
043788530
ABSTRACT:
A flow cavitation insert device is adapted to be positioned adjacent a conventional nozzle, the nozzle then is converted to a cavitation nozzle for a rock bit. The cavitation device is designed to operate with hydraulic drilling mud and comprises a circular adapter plate with a concentric orifice formed thereby. A cavitation-inducing, flow restrictor crossbar radially intersects the center of the orifice formed by the plate. The crossbar is secured to the circular disc where the opposite ends of the flow restrictor come in contact with an axially aligned wall forming the inside diameter of the orifice.
REFERENCES:
patent: 2855182 (1958-10-01), Payne
patent: 4185706 (1980-01-01), Baker et al.
patent: 4187921 (1980-02-01), Garner
patent: 4193635 (1980-03-01), Thiruvengadam
patent: 4262757 (1981-04-01), Johnson, Jr. et al.
patent: 4342425 (1982-08-01), Vickers
Chia Weng-Kwen R.
Forrest Robert S.
Falk Joseph
Purser Ernest R.
Smith International Inc.
Upton Robert G.
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