System and method for external power generation for mobile rigs for wells

A method for providing alternate power to a mobile well-rig, comprising:

• positioning a mobile power generation system (PGS) proximate to a mobile well-rig, wherein the mobile power generation system (PGS) comprises:
• a PGS chassis;
• a motor controller mounted on the PGS chassis, the motor controller having an electrical power interface configured to receive electrical energy from an external electrical energy source and output the electrical energy;
• an electric motor mounted on the PGS chassis and configured to receive the electric energy from the motor controller and convert the electrical energy into mechanical energy;
• a transmission mounted on the PGS chassis;
• a drive shaft having a proximal end rotatably engaged with the electric motor and having a distal end rotatably engaged with the transmission, the drive shaft configured to transfer the mechanical energy from the electric motor to the transmission;
• and
• a PGS drive system mounted on the PGS chassis, the PGS drive system comprising:
• a PGS gear box having one or more PGS gears;
• a PGS input shaft having a proximal end rotatably engaged with the transmission and a distal end rotatably engaged with the PGS gear box, the PGS input shaft configured to transfer the mechanical energy from the transmission to the PGS gear box;
• and
• a PGS output shaft having a proximal end rotatably engaged with the PGS gear box and a distal end extending beyond the PGS chassis;
• engaging the PGS output shaft of the PGS drive system with a rig output shaft having a proximal end and a distal end, the distal end mechanically rotatably engaged with a drawworks of the mobile well-rig, the rig output shaft configured to transfer mechanical energy to the drawworks;
• and
• activating the electric motor of the mobile power generation system, thereby providing mechanical energy through the transmission and the PGS drive system to the drawworks of the mobile well-rig.