OILWELL CASING ELECTRICAL POWER PICK-OFF POINTS

A power supply apparatus is provided for supplying power and communications within a first piping structure. An external power transfer de-vice (42) is positioned around the first piping structure (24) and is magneti-cally coupled to an internal power transfer device (44). The internal power transfe...

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Bibliographische Detailangaben
Hauptverfasser:	VINEGAR, HAROLD J, BURNETT, ROBERT REX, SAVAGE, WILLIAM MOUNTJOY, HIRSCH, JOHN MICHELE, CARL, FREDERICK GORDON JR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FIXED CONSTRUCTIONS GENERATION MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS SIGNALLING SYSTEMS FOR STORING ELECTRIC ENERGY TRANSMISSION TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS
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Beschreibung
Zusammenfassung:	A power supply apparatus is provided for supplying power and communications within a first piping structure. An external power transfer de-vice (42) is positioned around the first piping structure (24) and is magneti-cally coupled to an internal power transfer device (44). The internal power transfer device (44) is positioned around a second piping structure (26) dis-posed within the first piping structure (24). A main surface current flowing on the first piping structure (24) induces a first surface current within the external power transfer device (42). The first surface current causes a second surfac e current to be induced within the internal power transfer device (44).