SYSTEM FOR TRANSMISSION OF ELECTRIC POWER AND INFORMATION IN COLUMN OF JOINED PIPES Russian patent published in 1995 - IPC

FIELD: systems for transmission of electric power and information. SUBSTANCE: system for transmission of electric power and information in column of joined pipes has electric conductors located along pipe body and members of contactless communication on pin and box. These members are made in form of transformer windings located in annular recesses of joined pipes. Annular recesses are made, either on end face of box and on stop surface of pin, or in conical thread surfaces of pin and box, or on the end face of pin and box plane opposite to pin, or in external cylindrical surfaces of pin and box, or in internal surfaces of nipple and box. Transformer windings may be located inside their own opened magnetic circuits. In this case, pipes may be made of nonmagnetic material. Transformer windings may be wound round their own closed circular magnetic circuits installed in annular recesses. In this case, pipes may be made of nonmagnetic electric conducting material. EFFECT: higher efficiency. 12 cl, 25 dwg