Steerable underreamer/stabilizer assembly and method

Details Steerable underreamer/stabilizer assembly and method Steerable underreamer/stabilizer assembly and method

E - Fixed Constructions

21

B

E21B 10/34 (2006.01) E21B 7/08 (2006.01) E21B 10/26 (2006.01)

Patent

CA 2573888

A bottom hole assembly includes a drill bit, a stabilized underreamer assembly located behind the drill bit, and a drilling assembly. A method to drill a formation includes positioning a stabilized underreamer assembly behind a drill bit, positioning a drilling assembly behind the stabilized underreamer assembly, and rotating the drill bit and stabilized underreamer assembly with the drilling assembly. A stabilized underreamer located between a directional drilling assembly and a drill bit includes at least one arm assembly extending from the stabilized underreamer assembly, wherein the arm assembly includes a stabilizer portion and an underreamer cutting structure.

Un ensemble fond de trou comprend un trépan, un ensemble élargisseur stabilisée situé derrière le trépan et un ensemble de forage. Un procédé pour forer une formation consiste à positionner un ensemble élargisseur stabilisé derrière un ensemble trépan, à positionner un ensemble de forage derrière l'ensemble élargisseur stabilisé et à faire tourner l'outil de forage et l'ensemble élargisseur stabilisé avec l'ensemble de forage. Un élargisseur stabilisée situé entre un ensemble de forage directionnel et un trépan comprend au moins un ensemble de bras s'étendant à partir de l'ensemble élargisseur stabilisé, l'ensemble de bras comprenant une partie de stabilisateur et une structure de coupe d'élargisseur..

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