Patent ID: 7946360

Claim:
A system for drilling a lateral hole departing from a main well, the system comprising: a motor assembly including: a motor to generate a rotating torque; an axial thruster to generate an axial force; a blocking system to fix the motor and the axial thruster downhole; a drive shaft to transmit the rotating torque; and a connector for transmitting the rotating torque and the axial force from the motor assembly to a drill string assembly, the drill string assembly comprising a drill pipe and a drill bit, the connector providing a fluid communication channel between the motor assembly and an inside of the drill pipe; wherein the connector is one of a first connector or a second connector, the first connector being connectable to the drill string assembly so as to transmit the axial force only to the drill pipe, and to transmit the rotating torque to a further drive shaft positioned within the drill pipe, and the second connector being connectable to the drill string assembly so as to transmit both the axial force and the rotating torque to the drill pipe.