Expandable drilling tool

Details Expandable drilling tool Expandable drilling tool

E - Fixed Constructions

21

B

E21B 10/32 (2006.01) E21B 7/28 (2006.01)

Patent

CA 2487874

System (1) for increasing the diameter of at least a portion of a well bore, said system being intended to be attached to a drill pipe (3), said system having the improvement that the support element (10) bearing the curring arms (13, 14) is mounted movable with respect to the body (4) and that the arms and the chamber (6) of the body (4) are designed so as to cooperate.

L'invention concerne un système (1) pour augmenter le diamètre d'au moins une partie d'un puits. Ledit système est conçu pour être fixé à une tige de forage (3) et est amélioré en ce que l'élément de soutien (10) portant les bras de coupe (13, 14) est monté mobile par rapport au corps (4) et en ce que les bras et la chambre (6) du corps (4) sont conçus pour coopérer.

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