Intervention device for a subsea well, and method and cable...

E - Fixed Constructions – 21 – B

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E21B 19/00 (2006.01) E21B 19/22 (2006.01) E21B 23/14 (2006.01) E21B 33/076 (2006.01)

Patent

CA 2400001

A device for intervention of a subsea oil and/or gas well by means of a tool (8) suspended by a cable (9), fed from or withdrawn to a vessel (1) and driven by a drive mechanism (12) located on the vessel. The device comprises a lubricator (5) having a tool housing for the insertion of the tool into the well, and a stuffing box (40) sealing around the cable after the tool is inserted into the well. According to the invention an injector which drives the cable in the well is located on the lubricator, and is controllable independently of the drive mechanism for the cable located on the vessel. The drive mechanism and the injector may be synchronized in a manner, among others, providing that the cable is hanging in a predetermined arc during the intervention, whereby the vessel may be moved from the well. Moreover, the invention relates to a method and a cable used together with the device.

L'invention concerne un dispositif d'intervention dans un puits de pétrole et/ou de gaz sous-marin au moyen d'un outil (8) suspendu par un câble (9), que l'on peut lâcher ou retirer d'un navire (1), et entraîné par un mécanisme (12) d'entraînement placé sur le navire. Le dispositif comporte un lubrificateur (5) doté d'un logement à outil conçu pour insérer l'outil dans le puits, et un presse-étoupe (40) destiné à étanchéifier autour du câble une fois l'outil introduit dans le puits. Un injecteur, qui entraîne le câble dans le puits, est placé sur le lubrificateur et peut être commandé indépendamment du mécanisme d'entraînement du câble situé sur le navire. Ledit mécanisme et l'injecteur peuvent être synchronisés d'une manière, notamment, qui permette au navire de s'éloigner du puits, pour autant que le câble soit suspendu suivant un arc prédéterminé pendant l'intervention. De plus, l'invention concerne un procédé ainsi qu'un câble que l'on peut utiliser avec ledit dispositif.

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