Friction-reducing drill pipe component

Details Friction-reducing drill pipe component Friction-reducing drill pipe component

E - Fixed Constructions

21

B

E21B 17/10 (2006.01) E21B 17/046 (2006.01)

Patent

CA 2230512

The friction-reducing drill pipe component in the form of a sub (10) is adapted to form part of a drill string. The sub (10) comprises a tubular mandrel (12) having first and second ends for connection to adjacent components of the drill string. A sleeve (18) is mounted on the mandrel (12), and first and second stops on the mandrel (16, 20) restrain the sleeve (18) against axial movement relative to the mandrel (12). One of the stops (20) is removable or retractable to permit the sleeve (18) to be removed over the first end of the mandrel.

Elément de tige de forage à réduction de frottement, constitué d'une réduction (10) adaptée pour faire partie d'un train de tiges. La réduction (10) comporte un mandrin tubulaire (12) comportant une première et une deuxième extrémités destinées à être raccordées aux éléments adjacents du train de tiges. Un manchon (18) est monté sur le mandrin (12), et une première et une deuxième butées sur le mandrin (16, 20) empêchent le mouvement axial du manchon (18) par rapport au mandrin (12). L'une des butées (20) est amovible ou rétractable, ce qui permet de retirer le manchon (18) en le faisant passer sur la première extrémité du mandrin.

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