Method and bit for directional horizontal boring

Method and casing for excavating a borehole

Method and composition for preserving core sample integrity usin

Method and composition for preserving core sample integrity usin

Method and composition for preventing or treating lost...

Method and composition for sweep of cuttings beds in a...

Method and compositions for fluid loss and seepage loss control

Method and control system for directional drilling

Method and core barrel apparatus for obtaining and retrieving su

Method and device for adjusting the path of a drilling tool fixe

Method and device for boring holes

Method and device for boring holes in soil or rock

Method and device for deviated coring and/or drilling

Method and device for directional down-hole drilling

Method and device for drilling holes in soil or rock material

Method and device for drilling, particularly percussion or...

Method and device for driving bore-holes, especially in the...

Method and device for injecting a fluid into a formation

Method and device for making a hole in the ground

Method and device for moving a tube in a borehole in the ground