METHOD FOR PRESSURIZING THE INNER FLOW SPACE OF A FLEXIBLE PIPE INTENDED FOR TRANSPORTING HYDROCARBONS

The present application relates to a method for pressurizing the inner flow space of an underwater flexible pipe (301) intended for transporting hydrocarbons, comprising the following steps: a) providing a flexible pipe (301) comprising a reinforcing layer made up of a short-pitch winding of at leas...

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Bibliographische Detailangaben
Hauptverfasser:	BRUSSELLE-DUPEND, NADEGE, LEFEBVRE XAVIER, EPSZTEIN, THOMAS
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 MEASURING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The present application relates to a method for pressurizing the inner flow space of an underwater flexible pipe (301) intended for transporting hydrocarbons, comprising the following steps: a) providing a flexible pipe (301) comprising a reinforcing layer made up of a short-pitch winding of at least one metal wire with noncontiguous turns (204) around a thermoplastic polymer sheath defining an inner space, then b) filling the inner space of the flexible pipe (301) with an oil, then c) increasing the inner pressure Pi of the flexible pipe (301) to at least 10 MPa, the inner pressure being exerted by said oil, then d') maintaining the inner pressure Pi of the flexible pipe (301) at a pressure of at least 10 MPa for a time D of at least one minute, characterized in that said oil has a kinematic viscosity at 40?C, measured according to the ASTM D445 standard, of more than 10 mm2/s. This method makes it possible to reduce, or even prevent, the appearance of cavitation and crazing on the polymer sheath (202; 402; 502).