US Patent 9932799 Tractor and high pressure nitrogen pumping unit

A system using a semi-tractor and the engine of the semi-tractor to heat a fluid from a cryogenic temperature to approximately room temperature while pressurizing the fluid is disclosed. The system is mounted on the frame of the semi-tractor and preserves the ability of the semi-tractor to haul a standard semi-trailer tanker. The system uses a semi-tractor having an internal combustion engine cooled by a liquid coolant, a cab with a sleeper section. The sleeper section is used as a control cabin for allowing an operator to monitor the operation of the system in the field. The frame includes a fifth wheel type coupler that is mounted forward of the rearmost wheel axle of the semi-tractor.