E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/24 (2006.01) E21B 17/10 (2006.01)
Patent
CA 2598587
The invention relates to a centralization and running tool (CTR) in a subsea installation in connection with offshore related oil and gas exploration, where the subsea installation (SCM) is arranged to be placed on the ocean bottom or a drilling template and comprises a pipe-formed body (10), at least partially open at the top and extended, arranged to receive and carry through a drill stem (12) from a drilling rig or a drilling vessel. The centralization and running tool (20) is arranged to surround the drill stem (12) and to be placed in the pipe-formed body (10), and the centralization and running tool (20) comprises, together with the drill stem (12), a rotary packing housing (22) with a number of seals (24, 26) that lie against the drill stem (12), and the packing housing (22), in accordance with the movements of the drill stem (12), is arranged for radial movement to take up angular deviations of the drill stem (12). The invention also relates to a method to provide a fluid- tight seal against a drill stem (12) and against the surroundings in a subsea installation.
L'invention concerne un outil de centralisation et de pose (CTR) utilisé dans une installation sous-marine connectée à une installation pétrolière et gazière offshore. L'installation sous-marine (SCM) est placée sur le plancher océanique ou une plaque de base provisoire, et comprend un corps tubulaire (10), au moins partiellement ouvert au niveau de sa partie supérieure et étendu, adapté pour recevoir et transporter une tige (12) de forage à partir d'un appareil ou d'un engin de forage. L'outil (20) de centralisation et de pose entoure la tige (12) de forage et est placé dans le corps tubulaire (10), et comprend, avec la tige (12) de forage, un logement rotatif (22) avec un certain nombre de joints (24, 26) positionnés par rapport à la tige (12) de forage. Ledit logement (22), associé aux mouvements de la tige (12) de forage, effectue un mouvement radial en fonction des déviations angulaires de la tige (12) de forage. L'invention concerne également un procédé d'étanchéification par rapport à la tige (12) de forage et à l'environnement de l'installation sous-marine.
Iversen Arvid
Agr Subsea As
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
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