Feasibility Study of Hydro-Mechanical Borehole Deviation Sensing.

摘要

In answer to the mining industry's need to drill long horizontal holes in rock, a hydro-mechanical borehole guidance concept is developed and tested in the laboratory. Limiting borehole deviations to less than .020in/ft is suggested as a possibility provided a sensor element of sufficient sensitivity is feasible. The hydro-mechanical borehole deviation sensor described here is a simple concept which uses the drilling fluid as a sensing medium. Preliminary test results using a model of this sensor indicate its straightness measurement sensitivity to be .003in/ft of penetration.