E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/11
E21B 7/18 (2006.01) E21B 7/06 (2006.01)
Patent
CA 2030024
Hydraulic drilling method and apparatus in which the drilling fluid itself is utilized to control the direction in which a hole is bored in the earth. The drilling fluid is discharged through a plurality of forwardly facing nozzles which are inclined at different angles about the axis of the drill head, and the drilling fluid is selectively applied to the nozzles by a rotatable valve member to control the direction in which the hole is cut.
Dickinson Ben Wade Oakes III
Pesavento Michael J.
Turin Paul S.
Wilkes Robert D. Jr.
Dickinson Ben Wade Oakes III
Dickinson Robert Wayne
Smart & Biggar
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