Instrumentation for the Cornering Water-Jet Drill

摘要

A cornering drilling system is being developed which utilizes rotating high-pressure water jets to drill horizontal holes from a vertical borehole. Aboveground tests of the full-scale system are underway. A key feature of the system is the ability to monitor the performance of the drilling equipment and the location of the drill string underground at all times. To do this, the drill utilizes on-board directional transducers, a computerized data acquisition and processing subsystem, and a driller's control station. The instrumentation system has worked satisfactorily in the two holes drilled at the Sandia National Laboratories testing facility. This report summarizes the design and evaluation of that instrumentation system to date. 10 figures. (ERA citation 07:059919)