1
Lawrence J Leising: Methods and apparatus for controlled directional drilling of boreholes. Schlumberger Technology Corporation, January 20, 1987: US04637479 (104 worldwide citation)

In the representative embodiments of the present invention described herein, a new and improved directional drilling tool carrying a rotable drilling bit is dependently coupled to a rotatable drill string for excavating a borehole along one or more selected courses of excavation. Passage means on th ...


2
Pralay K Das: Methods and apparatus for controlled directional drilling of boreholes. Anadrill Incorporated, April 26, 1988: US04739841 (44 worldwide citation)

In the representative embodiments of the present invention described herein, new and improved methods and apparatus are disclosed for measuring various forces acting on an intermediate body between the lower end of a drill string and the earth-boring apparatus coupled thereto whereby the magnitudes ...


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Jeremy Dowling, Geoff Beale: Mine dewatering system and method. WSP GLOBAL, Law Office of Jesse D Lambert, November 21, 2017: US09822641

A system and method for removing water from mine areas. In one embodiment, one or more directionally drilled dewatering wells are drilled into the geologic formation such that at least a portion of the dewatering well is positioned underneath the mine. In one embodiment, one or more of the dewaterin ...


5
Leising Lawrence J: Methode et dispositif de forage directionnel controle de puits, Methods and apparatus for controlled directional drilling of boreholes. Analysts International, SMART & BIGGAR, February 21, 1989: CA1250280

ABSTRACT OF THE DISCLOSURE In the representative embodiments of the present inventiondescribed herein, a new and improved directional drilling toolcarrying a rotable drilling bit is dependently coupled to arotatable drill string for excavating a borehole along one ormore selected courses of excavati ...