Advanced Techniques for Drilling 1,000-Ft Small Diameter Horizontal Holes in a Coal Seam. Volume 2. Survey System Design and Fabrication.
NTIS: PB 249 714 Available for Reference At Bureau Libraries :167 pages
The objective of this work was to design, fabricate, and field test a model of a telemetry survey system configured for use in a fenix & scisson program for the investigation, testing, and evaluation of horizontal drilling control techniques in coalbeds. The device did not perform satisfactorily in field tests because of malfunctioning of certain components. Further development is needed. The Bureau of Mines methane research program has made the delimination uncontrolled methane emission in coal mines one of its major objectives. The Bureau's immediate effort is toward the prevention of disastrous explosions, but the ultimate goal is to provide the technology needed to predrain the methane far in advance of active mining.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 249 714 Available for Reference At Bureau Libraries