The present invention addresses to a method of clearing submarine pipes, in which the method solves the most complex cases of obstruction of flexible submarine pipes, where the conventional approach is ineffective. Additionally, the present invention represents a cheaper alternative to the clearance of pipes in scenarios where the conventional approach is applicable. The method of clearing flexible pipes using flexitube from a well intervention rig of the present invention comprises as one of its main steps: with the aid of a remotely operated vehicle (51), opening a flanged connection (10) between two flanges (15) of the legs (12 and 14) of a submarine pipe (40) and installing a pull head (16 and 17) in each of these legs (12 and 14); and using well intervention rig (120) operations; assembling the hoisting assembly (58) for hoisting the leg (14) of the submarine pipe (40) with the drill string (50); hoisting the leg (14) of the submarine pipe (40) through its end using the hoisting assembly (58) coupled to the pull head (16); draining the internal pressure of the pipe by means of the connection of a tube (67) with the pull head (16); assembling the Surface Flow Tree (70) at the end of the leg (14) of the submarine pipe (40), using the connection adaptation parts (90) and (91) to make the end of the leg compatible with the Surface Flow Tree; assembling the Flexitube (80) on the Surface Flow Tree (70) and surface lines (72); carrying out the operation of clearing the leg (14) of the submarine pipe (40) with Flexitube (80).
METHOD FOR CLEARING FLEXIBLE LINES USING COILED TUBING FROM A WELL INTERVENTION RIG
2023-11-02
Patent
Elektronische Ressource
Englisch
SAE Technical Papers | 1960
Coiled tubing and vessel motions for riserless coiled tubing systems
Tema Archiv | 2004
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