Interconnection of subsea pipelines and structures

There is provided a method of interconnecting a conduit (figure 10, 57) and a plurality of subsea structures. The method involves providing a first manifold header (figure 11, 67) in-line of the conduit, where the first manifold header has at least one valve installed therein. A portion of the condu...

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Bibliographische Detailangaben
Hauptverfasser:	Håvar Ilstad, Erik Levold
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	There is provided a method of interconnecting a conduit (figure 10, 57) and a plurality of subsea structures. The method involves providing a first manifold header (figure 11, 67) in-line of the conduit, where the first manifold header has at least one valve installed therein. A portion of the conduit is lowered to the sea bed such that the first manifold header is engaged with a first subsea structure 51, and a further portion of the conduit is lowered to the sea bed. A second manifold header 69, having at least one valve installed therein, is provided in-line of the conduit and engaged with a second subsea structure 52. The length of conduit provided on the sea bed between the first subsea structure 51 and the second subsea structure 52 is significantly greater than the distance between the first and second subsea structures. In an alternative embodiment, there is provided a method of interconnecting a header pipe joint at a subsea structure.