Boring or penetrating the earth – Miscellaneous
Patent
1986-08-22
1987-11-24
Novosad, Stephen J.
Boring or penetrating the earth
Miscellaneous
175 67, 299 17, E21B 718, E21B 1060
Patent
active
047082143
ABSTRACT:
A rotatable end deflector for an abrasive water jet drill is provided. The end deflector includes two wear resistant plates which direct portions of the water jet in opposite forward directions. Preferably, the abrasive water jet drill includes a source of high pressure water and a high pressure water outlet from which a stream of water is expelled. A venturi device is provided adjacent the water outlet for creating a vacuum. A feed device feeds an abrasive particular material to the venturi device so that the abrasive material is entrained in the stream of water. Thereafter, the stream of water is collimated in a rotating tube which produces a rotating cylindrical water jet which is then deflected before it impinges on the rock to drill the rock. The abrasive material is preferably sand and the tube including the deflector is easily replaceable.
REFERENCES:
patent: 3997111 (1976-12-01), Thomas et al.
patent: 4119160 (1978-10-01), Summers et al.
patent: 4204715 (1980-05-01), Lavon
patent: 4240664 (1980-12-01), Mahyera et al.
patent: 4280735 (1981-07-01), Lobbe
patent: 4306627 (1981-12-01), Cheung et al.
patent: 4640644 (1987-02-01), Puchala et al.
Connors Steven W.
Krawza Walter G.
Savanick George A.
Koltos E. Philip
Novosad Stephen J.
The United States of America as represented by the Secretary of
Zack Thomas
LandOfFree
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