E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/04 (2006.01) E21B 4/00 (2006.01)
Patent
CA 2578388
A directional drilling mechanism is disclosed. The mechanism is also an impact drill.
Bennett Duane H.
Foster Jerry
Sanders Michael P.
Bennett Duane H.
Blake Cassels & Graydon Llp
Foster Jerry
Sanders Michael P.
LandOfFree
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