E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/10 (2006.01)
Patent
CA 2567339
A fitting for engagement to a drill string or further fitting having a body with a bore therethrough provided with a plurality of roller means on an exterior of the body. Each roller has one or more roller provided thereon and is rotatable relative to the body about an axis transverse to an axis of the bore. The arrangement is such that the roller means can rotate relative to the body to facilitate reduction of rotational and axial friction.
Dispositif auxiliaire pour train de tiges de forage ou autre raccord ayant un corps pourvu d'un alésage et doté d'une pluralité de moyens de roulement sur une partie extérieure du corps. Chaque moyen de roulement comporte un ou plusieurs rouleaux et peut tourner par rapport au corps autour d'un axe transversal à un axe de l'alésage. L'agencement est tel que le rouleau peut tourner par rapport au corps pour faciliter la réduction de frottement rotationnel et axial.
Fernandes Denis Robert
Murray Geoffrey Neil
Mcfadden Fincham
Weatherford/lamb Inc.
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