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AssigneeFMC Kongsberg Subsea AS
InventorHans-Paul Carlsen
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A device for intervention of a subsea oil and/or gas well by means of a tool (8) suspended by a cable (9), fed from or withdrawn to a vessel (1) and driven by a drive mechanism (12) located on the vessel.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.
A device for intervention of a subsea well (10) by means of a tool or the like suspended by a cable (9), fed from, respectively withdrawn on a vessel (9) or the like, and driven by a drive mechanism located at the vessel, the device comprising a lubricator (5) adapted to be placed on a Christmas tree (4) in the well, and having a tool housing, for the insertion of the tool into the well, and sealing means (40), which encloses the cable in a slidable and sealed manner after the tool is inserted into the well, characterized in an injector (50;
A device for intervention of a subsea well (10) by means of a tool or the like suspended by a cable (9), fed from, respectively withdrawn on a vessel (9) or the like, and driven by a drive mechanism located at the vessel, the device comprising a lubricator (5) adapted to be placed on a Christmas tree (4) in the well, and having a tool housing, for the insertion of the tool into the well, and sealing means (40), which encloses the cable in a slidable and sealed manner after the tool is inserted into the well, characterized in a self-movable tractor (18) driving the cable in the well, which is fastened to the cable or the tool, and wherein the drive mechanism and tractor are independently controllable, whereby the cable may both be driven to move the tool in the well and in response to the movements of the vessel at the surface (2).
A device according to any of the preceding claims, characterized in that the sealing means (40) comprises an elastic sleeve element (111) for slidable and sealed ledthrough of the cable (9).
A device according to any of the preceding claims, characterized in that the cable comprises a plastic material (20) reinforced by carbon or glass fibres, whereby the cable achieves the required degree of rigidity, and a coating (21) of a material having low friction coefficient.
Dependencies are inferred from the claim text.