A cabled communication link for a drill string, a drill string telemetry system, and a borehole boring method

摘要

A cabled communication link (5b) for a drill string (6), wherein at least two adapter elements (9) spaced apart in the drill string (6) by a distance (d1) exceeding the length of three interconnected drill pipe members (8), and by a cable (112) connecting the adapter elements (9) for communicating a signal therebetween.