Directional multi-blade boring head
Directional multi-blade boring head
Drill pipe
Drilling hole system for horizontal boreholes
Drilling machine and method of horizontal boring
Drilling short radius curvature well bores
Erectable arm assembly for use in boreholes
Erectable arm assembly for use in boreholes
Extending the lateral portion of a short-radius wellbore
High-efficiency earth boring system
Hole reaming apparatus and method
Horizontal boring apparatus and method
Impact device for directional boring
In-shaft drilling method for recovery of gas from subterranean f
Lateral hole boring method and apparatus
Lubricated pilot tubes for use with auger boring machine...
Method and apparatus for drilling a tunnel
Method and apparatus for drilling with a flexible shaft while us
Method and apparatus for forming lateral boreholes
Method and apparatus for horizontal drilling