System for power supply to subsea installations
US7992632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2005 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/58
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a preferably heat insulated pipeline (10), in which the possibility for internal formation of detrimental hydrates or wax deposits are present, and comprising electrical power supply cables (12, 31) for direct electrical heating of the pipeline (10), and having an electrical connection (36) to the surrounding sea at an end of the supply cable. The power supply cable (12) is further configured, in a second circuit configuration, to provide a three-phase power supply to an electrically powered motor in an subsea installation unit (11) connected to the pipeline (10), and that means (18, 19) are arranged for switching so that the three conductors (28) forming the power supply cables (12) form parallel conductors in a second circuit configuration, wherein the power supply cables (12, 31) supply power for direct heating of the pipeline (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.