Directional core drilling used to explore rock conditions for a water supply tunnel

Dowdell, R. / Kaplin, J. / Tokle, V. et al. | British Library Conference Proceedings | 1999

Directional Core Drilling for Geotechnical Exploration

Lindhjem, R. / Tai, C. / Institute of Materials, Minerals, and Mining | British Library Conference Proceedings | 2009

Using Directional Drilling Techniques to Intersect the American Tunnel

Johnson, Erinn P. / Beckman, E. Morley / Goss, Christoph et al. | TIBKAT | 2021

Directional Core Drilling, The State-of-the-Art

Dawson, C. W. / Tokle, V. | British Library Conference Proceedings | 1999

Directional Drilling

Inglis, T. A. | TIBKAT | 1987