METHOD FOR INTERCONNECTING TUBULARS BY FORGE WELDING

A METHOD FOR INTERCONNECTING TUBULARS BY FORGE WELDING CONPRISES: ARRANGING THE TUBULAR ENDS (12, 12A) THAT ARE TO BE INTERCONNECTED AT A DISTANCE UP TO A FEW MILIMETERS FROM ECH OTHER IN A SHIELD GAS CHAMBER, INTO WHICH A REDUCING NON-EXPLOSIVE FLUSHING FLUID MIXTURE (E.G. N2 + H2) ITS INJECTED; HE...

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Hauptverfasser:	ROBERT ANDREW ALFORD, KLISTHENIS DIMITRIADIS, ANTHONY THOMAS COLE
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Zusammenfassung:	A METHOD FOR INTERCONNECTING TUBULARS BY FORGE WELDING CONPRISES: ARRANGING THE TUBULAR ENDS (12, 12A) THAT ARE TO BE INTERCONNECTED AT A DISTANCE UP TO A FEW MILIMETERS FROM ECH OTHER IN A SHIELD GAS CHAMBER, INTO WHICH A REDUCING NON-EXPLOSIVE FLUSHING FLUID MIXTURE (E.G. N2 + H2) ITS INJECTED; HEATING EACH TUBULAR END (12, 12A) WITHIN SAID SPACE BY MEANS OF AT LEAST THREE ELECTRODES (2-5, 2A-5A) THET ARE PRESSED AT CIRCUMFERENTIALLY SPACED INTERVALS AGAINST THE WALL OF EACH TUBULAR 1, 1A ADJACENT TO THE TUBULAR END (12, 12A) SUCH THAT A HIGH FREQUENCY ELECTRICAL CURRENT (7) IS TRANSMITTED IN A SUBSTANTIALLY CIRCUMFERENTIAL DIRECTION THROUGH THE TUBULAR SEGMENTS BETWEEN THE ELECTRODES (2-5, 2A-5A); AND MOVING THE THUS UNIFORMLY HEATED TUBULAR ENDS (12, 12A) TOWARDS EACH OTHER UNTIL A FORGE WELD IS FORMED BETWEEN THE HEATED TUBULAR ENDS (12, 12A).(FIG 2)