Steerable Drill Bit System

摘要

A steerable drilling system in accordance to an embodiment includes a bias unit integrated with the drill bit to form a steering head and an electronic control system located remote from the steering head and electrically connected to a digital valve of the bias unit.

主权项

1. A steering head for connecting to a drill string, the steering head comprising:
an intermediate section comprising two or more steering actuators in operation moveable in a radial direction to provide steering inputs; a first section comprising a digital valve to control flow of pressurized fluid to individual steering actuators of the two or more steering actuators; and a distal section comprising a formation cutting structure, the intermediate section positioned between the first section and the distal section.