E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/08 (2006.01) E21B 10/26 (2006.01) E21B 47/12 (2006.01)
Patent
CA 2672658
In one aspect of the present invention, a drill bit assembly has a body portion intermediate a shank portion and a working portion The working portion has at least one cutting element and at least a portion of a shaft is disposed within the body portion and protrudes from the working portion The shaft has a distal end rotationally isolated from the body portion and is in communication with a subterranean formation A motor is adapted to rotationally control the distal end.
La présente invention concerne, dans un aspect, un ensemble de trépan comportant une portion de corps intermédiaire entre une portion de queue et une portion de travail. La portion de travail a au moins un élément de coupe et au moins une portion d'un angle est disposée dans la portion de corps et fait saillie de la portion de travail. L'arbre a une extrémité distale isolée en rotation de la portion de corps et est en communication avec une formation souterraine. Un moteur est conçu pour commander en rotation l'extrémité distale.
Hall David R.
Lundgreen David
Shumway Jim
Turner Paula
Borden Ladner Gervais Llp
Hall David R.
Schlumberger Technology Corporation
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