Drill bit stabilizer and method of use

Details Drill bit stabilizer and method of use Drill bit stabilizer and method of use

E - Fixed Constructions

21

B

E21B 17/10 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2403727

A stabilizer (10) for a drill string (13) and drill bit (17) is mounted behind the drill bit in the drilling assembly. The stabilizer (10) comprises a tubular body (12) having one or more stabilizer blades (18) mounted thereon. The stabilizer blades (18) extend radially outwardly from the stabilizer body (12). In a first position, the stabilizer blades (18) are in vertical axial alignment behind the drill bit (17). Drill string pressure is utilized to release a locking mechanism (36 and 38) permitting relative rotation between the stabilizer blades (18) and the stabilizer body (12) thereby rotating the stabilizer blades (18) to a second position providing stabilization for the drill string (13) and drill bit (17).

L'invention concerne un stabilisateur destiné à un train de tiges de forage et à un trépan, monté derrière le trépan dans l'ensemble de forage. Ce stabilisateur comprend un corps tubulaire sur lequel sont montées une ou plusieurs lames de stabilisation. Les lames de stabilisation s'étendent de manière radiale vers l'extérieur depuis le corps du stabilisateur. Dans une première position, les lames de stabilisation sont placées dans un alignement axial vertical derrière le trépan. La pression du train de tiges de forage est utilisée pour déverrouiller un mécanisme de verrouillage qui permet une rotation relative entre les lames de stabilisation et le corps de stabilisateur par orientation des lames de stabilisation dans une seconde position, ce qui permet de stabiliser le train de tiges de forage et le trépan.

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