E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/68
E21B 10/00 (2006.01) E21B 4/16 (2006.01) E21B 7/06 (2006.01)
Patent
CA 2031093
ABSTRACT OF THE DISCLOSURE The present invention discloses a drilling tool apparatus and method for sinking drill holes in underground rock formations while using a selectable direction profile for the drill hole.
Feld Dagobert
Jurgens Rainer
Krehl Dietmar
Oppelt Joachim
Roper Rudolf
Baker Hughes Incorporated
Swabey Ogilvy Renault
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