Bit connector

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 7/06 (2006.01) E21B 10/26 (2006.01) E21B 17/04 (2006.01) E21B 17/043 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2381528

The drilling assembly includes an eccentric adjustable diameter blade stabilizer (30), having a housing (43) with a fixed stabilizer blade (32) and a pair of adjustable stabilizer blades (34, 36), and a bi-center bit (20), having an eccentric reamer section (24) and a pilot bit (22), mounted on the eccentric stabilizer (30). The stabilizer (30) and bit (20) have an alignment mechanism (40) for aligning the fixed blade (32) with the reamer section (24). The alignment mechanism (40) includes an aperture (44) on the bit (20) which is aligned with an aperture (42) on the stabilizer (30) as the stabilizer (30) is made up on the bit (20). An alignment member (48) is received by the aligned apertures (42, 44) for maintaining the alignment.

L'ensemble de forage de l'invention comprend un stabilisateur à lames à diamètre réglable et excentrique (30) doté d'une lame fixe (32) et d'une paire de lames réglables (34, 36), un trépan bicentré (20) doté d'une partie alésoir excentrique (24) et d'un trépan pilote (22), monté sur le stabilisateur excentrique (30). Le stabilisateur (30) et le trépan (20) présentent un mécanisme d'alignement (40) pour aligner la lame fixe (32) avec la partie alésoir (24). Le mécanisme d'alignement (40) possède une ouverture (44) sur le trépan, alignée avec une ouverture (42) sur le stabilisateur lorsque ce dernier est monté sur le trépan (20). Un élément d'alignement (48) est reçu dans les ouvertures alignées (42, 44), de sorte que l'alignement soit maintenu.

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