DATA TRANSMISSION ON UNDERSEA PIPELINES

A sub-sea oil pipeline installation comprising a production platform (10) an d sub-sea facilities (15) at a plurality of well-heads (16), has a data transmission system by which data is transmitted in either direction between the master platform (10) and the sub-sea facilities (15) via communication...

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Bibliographische Detailangaben
Hauptverfasser:	DICKIE, NEIL MARSHALL, HUDSON, STEVEN MARTIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HEATING LIGHTING MECHANICAL ENGINEERING PIPE-LINE SYSTEMS PIPE-LINES STORING OF DISTRIBUTING GASES OR LIQUIDS TRANSMISSION WEAPONS
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Beschreibung
Zusammenfassung:	A sub-sea oil pipeline installation comprising a production platform (10) an d sub-sea facilities (15) at a plurality of well-heads (16), has a data transmission system by which data is transmitted in either direction between the master platform (10) and the sub-sea facilities (15) via communication channels formed by the electrically conducting material of the pipelines (12, 14). The data is transmitted in the form of a VLF or ELF electro-magnetic signal whic h comprises changes of voltage level oscillating about the DC voltage level of the pipe (12, 14) so that the mean level of th e signal is the DC voltage level of the pipe (12, 14).