E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/10 (2006.01)
Patent
CA 2735667
A drill pipe protector assembly comprising at least one protector sleeve (23) adapted to be mounted to the drill pipe string (7) through a fluid bearing (25) so as to be co-axially rotatable with respect to the drill pipe string (7). A retainer arrangement (21, 35) axially fixes the protector sleeve (23) with respect to the drill pipe string (7). The fluid bearing (25) is constructed according to the principles of a hydrostatic fluid bearing. At least one fluid channel (53) connects the fluid bearing (25) to a fluid path of pressurized drilling fluid flowing within an inner space (51) of the drill pipe string (7).
Cette invention concerne un ensemble protecteur de tige de forage comprenant au moins une gaine protectrice (23) conçue pour être montée sur le train de tiges de forage (7) par lintermédiaire dun palier fluide (25) de manière à pouvoir tourner dans un sens coaxial par rapport au train de tiges de forage (7). Une disposition de retenue (21, 35) fixe axialement la gaine protectrice (23) par rapport au train de tiges de forage (7). Le palier fluide (25) est construit selon les principes dun palier fluide hydrostatique. Au moins un passage de fluide (53) relie le palier fluide (25) à un circuit de fluide de forage pressurisé sécoulant dans un espace intérieur (51) du train de tiges de forage (7).
Marks & Clerk
Statoil Petroleum As
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