An externally testable redundant connection for a subsea well includes a tube, a connector assembly, and collar. The connector assembly includes a jam nut over the tube; a ferrule over the tube adjacent the jam nut; and a double jam nut disposed over the tube adjacent to the ferrule. The double jam nut...http://www.google.com.au/patents/US7219736?utm_source=gb-gplus-sharePatent US7219736 - Externally testable redundant connections for subsea wells
