Apparatus for deflecting a drill string

Apparatus for directional coring

Apparatus for drilling lateral drainholes from a wellbore

Apparatus for lateral drain hole drilling in oil and gas wells

Apparatus for making boreholes in the lateral walls of narrow un

Coring assembly for mounting on the end of a drill string

Drill bit for undercutting a blind bore

Method and apparatus for drilling a curved bore

Method and apparatus for drilling horizontal holes in geological

Method and apparatus for hydrocarbon recovery

Methods and apparatus for drilling holes laterally from a well

Multiple branch completion with common drilling and casing templ

Rotary vector gear for use in rotary steerable tools

Steerable drilling system

Wellbore milling-- drilling