04534427 is referenced by 89 patents and cites 10 patents.

An abrasive-fluid jet apparatus and process for drilling holes in rock having a rotary drill bit with multiple abrasive-fluid jet nozzles in the face of the bit and a stationary drill head housing torque generation apparatus and a rotary mounting holding the rotary drill bit beneath and in rotatable relation to the drill head. Abrasive supply facilities and fluid supply facilities are located at ground level for separate supply of the abrasive and the fluid to the abrasive-fluid jet nozzles. It is preferred that the abrasive be supplied to the nozzles in the form of slurry or foam. The apparatus and process of this invention permits deep hole drilling at lower fluid pressures than and without surface structures required by current deep drilling apparatus and techniques.

Title
Abrasive containing fluid jet drilling apparatus and process
Application Number
6/517000
Publication Number
4534427
Application Date
July 25, 1983
Publication Date
August 13, 1985
Inventor
Gene G Yie
29244 - 59th Ave. South, Auburn, 98002
WA, US
Fun Den Wang
108 S. Eldrige Way, Golden, 80401
CO, US
Agent
Thomas W Speckman
IPC
E21B 7/18
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