Mounting methods pipelines connecting subsea fields from the platform, with sea production plant

摘要

1. A method for installation of the pipeline connecting an offshore platform with an underwater deposit comprising the following stages: a) location of the first vessel of the hydrocarbon well; ! b) securing said conduit designed for pumping the hydrocarbons on the first vessel in the first end attachable to the trigger device on the first vessel; ! c) attaching the second end of the pipeline to the second vessel, placed near the first vessel; ! g) lowering the pipeline by means of the trigger; ! d) increasing the distance between the second vessel and the first vessel by moving the second vessel towards the third vessel anchored to an anchor position at a distance from the first vessel, and pulling of the pipeline to accommodate the second vessel near the third vessel; ! e) contacting the line section with the sea bed at a position between the first and second conduit end; ! f) moving the second end of the conduit to a distance from the first vessel in the direction of pipe length exceeding the distance between the first vessel and the mooring position of the third vessel; ! h) returning the second end of the pipeline on the anchor position of the third vessel; ! i) establishment of a hydraulic connection of the second end of the pipeline to the third vessel. ! 2. Riser installation method according to claim 1, wherein the second end of the conduit for pumping the hydrocarbons move from the second vessel to a third vessel when the second vessel is arranged between the first and the third vessel, the second vessel is moved to the side of the third vessel, distal from the first vessel, after which second end of the pipeline is moved to a second vessel, which departs from the lane