Phase 1 of the Electrodril System Field Test Program was set up to establish the technical viability of two Electrodril System configurations, the Directional Drilling System and the Major Drilling System. Both Electrodril configurations consist of an electric drill motor located directly above the bit, a downhole telemetry-control instrument designed to monitor hole position and other downhole parameters while drilling; a cable deployed through the drill string and remotely mated to the motor/instrument downhole in drilling mud and associated power conversion, cable handling , and data processing equipment on the surface. The Directional Drilling System used a 60HP drill motor, small 3/4" diameter downhole cable connectors, and a "Yo-Yo" type cable deployment system. It is designed to drill deviated holes to depths of 10,000 feet or less. The Major Drilling System used a 285HP drill motor, large 1" diameter downhole cable connectors, cable suspended in the drill pipe by a special sub, pre-wired pipes, and slip rings. It is designed For deep, tough drilling under hostile conditions. Both configurations were shown to be compatible with existing rig equipment and procedures. A deviated hole was drilled using the Directional Drilling System with a bent sub. A straight hole was drilled through a concrete plug set in a cased well using the Major Drilling System. The Downhole Telemetry/Command instrument was used to monitor hole position, temperature, downhole voltage, and vibration while drilling.