E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/10 (2006.01) E21B 7/06 (2006.01)
Patent
CA 2505556
This invention relates to a steerable drill bit arrangement, in particular for the use in drilling boreholes for oil and gas extraction. There is provided a steerable drill bit arrangement in which the drill bit (20) is connected to a drill string (16) including a steering component (12) and a stabiliser (14), the stabiliser (14) being located between the steering component (12) and the drill bit (20), the steering component (12) being adapted to move the drill string (16) transversely relative to a borehole in which it is located, the stabiliser (14) having an inner part (32) adapted to rotate with the drill string (16)and an outer part (34) adapted to engage the borehole wall, the outer part (34) being rotatable relative to the inner part so that the outer part (34) can remain substantially stationary as the remainder of the stabiliser (14) rotates with the drill string (16).
L'invention concerne un ensemble trépan de forage orientable destiné notamment au forage de trous pour l'extraction de pétrole et de gaz. Selon l'invention, le trépan (20) est relié à un train de sondage (16) comprenant un élément de guidage (12) et un stabilisateur (14), le stabilisateur (14) étant situé entre l'élément de guidage (12) et le trépan (20). L'élément de guidage (12) est conçu pour déplacer le train de sondage (16) transversalement relativement au trou de forage dans lequel il se trouve. Le stabilisateur (14) comporte une partie interne (32) conçue pour pivoter avec le train de sondage (16) et une partie externe (34) conçue pour être mise en prise avec la paroi du trou de forage. Pivotant relativement à la partie interne, la partie externe (34) reste sensiblement stationnaire, le reste du stabilisateur (14) tournant avec le train de sondage (16).
Larronde Michael L.
Stroud Daryl Richard Henry
Ridout & Maybee Llp
Smart Stabilizer Systems Limited
LandOfFree
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