Patent ID: 7156584
Filing Date: 2007-01-02
Classification: E02F,H02G

Abstract:
1. A pushing and non-floating method for installing a non-floating electrical cable along an uninterrupted installation section equal to or above one kilometer in length, the cable comprising at least one single-phase element having a conducting inner core and an insulating outer sheath, supporting an electrical voltage of at least 1000 V, the cable having a linear weight of at least 0.5 kg/m, and a relative density with respect to water greater than 1, the method comprising: providing along the installation section at least one installation duct, the ratio of the inside diameter of the duct to the outside diameter of the cable being between 1.2 and 1.6; pushing the cable into one inlet end of the at least one installation duct, with at least one the-main driving member engaging the outer sheath of the cable; injecting a pressurized liquid comprising water into the inlet end of the at least one installation duct, and providing at the inlet end a seal with respect to the injected liquid between an outer face of the cable being pushed and an inner face of the at least one installation duct, the at least one installation duct being fixed in relation to the cable; and adjusting injection of the flowing liquid in relation to a pushing thrust on the cable, so that, at least intermittently, the cable is centered into the at least one installation duct, and the pressurized liquid transfers thermal energy resulting from friction between the cable and the at least one installation duct.