Patent ID: 9657521
Date: 2017-05-23
CPC Classifications: E21B

Claim:
1. A directional drilling system comprising: a drilling head assembly including four or more independently controlled motors wherein each motor is connected to a respective drill bit assembly, wherein: a top motor drives a top drill bit assembly; a bottom motor drives a bottom drill bit assembly; a left motor drives a left drill bit assembly; a right motor drives a right drill bit assembly; wherein all of the drill bit assemblies are coplanar on a front face of the directional drilling assembly; wherein two of the motors each rotates their respective drill bit assembly clockwise and two of the motors each rotates their respective drill bit assembly counterclockwise to control the roll angle of the drilling head assembly in a bore hole; a drilling string attached to the drilling head assembly and containing an inner pipe to transport a drilling fluid to the drilling head assembly, and a drilling head control panel to translate steering commands in the form of an inclination angle, an azimuth angle, a roll position and a rate of penetration to the motors.