Controllable stabilizer

Controlled directional drilling tool

Crank connector for directional drilling

Curved drilling apparatus

Cutting structure for earth boring drill bits

Deviated wellbore drilling system and apparatus

Deviated wellbore drilling system and apparatus

Device comprising two articulated elements in a plane, applied t

Device for controlling the drilling direction of drill bit

Device for producing drilling holes from an angled position with

Device for steering a drilling tool and/or drill string

Device for the remote adjustment of the relative orientation of

Devices for drilling branched wells

Direction and angle maintenance tool and method for adjusting an

Direction controllable subsurface borehole tool

Directional boring head

Directional control mechanism for underground driven pipes and c

Directional downhole drill apparatus

Directional drill head

Directional drilling apparatus