IMPROVEMENTS IN SUBASSEMBLY ELECTRICAL ISOLATION CONNECTOR FOR DRILL ROD

摘要

A subassembly electrical isolation connector for interconnecting sections of a tubular drill rod has an electrically insulated connector for and between spaced-apart connector sections to transmit drilling forces therethrough, a sealing membrane is used for sealing an insulated spacing in the electricall y insulated connector to prevent ingress of pressurized drilling mud into the connector and shorting out said spaced-apart sections of said connector. The sealing membrane overlaps the connector sections as a continuous sleeve and has at least its sleeve ends sealed to respective portions of the connector sections to activate thereby the sealing membrane.