Drilling apparatus

Details Drilling apparatus Drilling apparatus

E - Fixed Constructions

21

B

E21B 7/06 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2257951

Directional drilling apparatus (25) for location on a drill string (20) comprises a stabiliser (32) having a mandrel (38) for connection to the drill string (20) and an eccentric non- rotating element (46) mounted on the mandrel (38) for offsetting the string (20) in the bore (22) and a non- rotating offset mass (34) for maintaining the element (46) at a selected orientation relative to the bore (22) as the drill string (20) rotates.

Dispositif de forage directionnel (26) conçu pour être placé sur une tige de sondage (20) et comprenant un stabilisateur (32) pourvu d'un mandrin (38) servant à accoupler le stabilisateur (32) à la tige de sondage (20), ainsi qu'un élément excentrique non rotatif (46) monté sur le mandrin (38) afin de décaler la tige (20) dans l'alésage (22) et une masse décalée non rotative (34) servant à maintenir l'élément (46) dans une orientation sélectionnée par rapport à l'alésage (22) simultanément à la rotation de la tige de sondage (20).

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