IMPROVEMENTS IN SUBASSEMBLY ELECTRICAL ISOLATION CONNECTOR FOR DRILL ROD

摘要

In a subassembly electrical isolation connector for interconnecting sections of a tubular drill rod, said subassembly having an electrically insulated connector for and between spaced-apart connector sections to transmit drilling forces therethrough, the use of a sealing membrane for sealing an insulated spacing in said electrically insulated connector to prevent ingress of pressurized drilling mud into said connector and shorting out said spaced-apart sections of said connector, said sealing membrane overlapping said connector sections as a continuous sleeve and having at least its sleeve ends sealed to respective portions of said connector sections to activate thereby said sealing membrane. 20