Patent ID: 9562394
Date: 2017-02-07
CPC Classifications: E21B

Claim:
1. A method of steering a drill bit of a drill string while drilling a wellbore, the method comprising: rotating the drill string, wherein a longitudinal axis of the drill bit is angularly offset from a longitudinal axis of the drill string by a bend; delivering, using an impact tool in the wellbore, a single impact for each azimuthal rotation of the drill bit about the longitudinal axis of the drill string, the impact being directed along both the longitudinal axis of the drill string and the longitudinal axis of the drill bit when the longitudinal axis of the drill bit is oriented in a desired azimuthal direction relative to the longitudinal axis of the drill string so as to direct the drill bit in the desired azimuthal direction due to the drill bit being angularly offset from the drill string; stopping the rotation of the drill string when the longitudinal axis of the drill bit is oriented in the desired azimuthal direction and after at least one impact is delivered using the impact tool; rotating the drill bit about its longitudinal axis using a mud motor; sliding the drill string when the drill string is not being rotated; and wherein the bend is interconnected between the drill bit and the impact tool and between the mud motor and the drill bit.