Hybrid pumper

A pumper, comprising:

• a. a cryogenic source for providing a cryogenic fluid for vaporization;
• b. a cryogenic pump in fluid flow communication with the cryogenic source for increasing the pressure of the cryogenic fluid;
• c. an unfired vaporizer coolant circuit in fluid flow communication with the cryogenic pump and adapted to accept the cryogenic fluid to form a heated stream, the unfired vaporizer coolant circuit comprising a condensing steam heat exchanger adapted to accept a steam stream from an external source for heat exchange with the unfired vaporizer coolant circuit;
• and
• d. a diesel engine power unit to provide power to the cryogenic pump and the unfired vaporizer coolant circuit.

A process for superheating a cryogenic fluid, comprising:

• a. providing a cryogenic fluid for vaporization;
• b. pressurizing the cryogenic fluid;
• c. warming the pressurized cryogenic fluid in an unfired vaporizer coolant circuit to form a warm pressurized fluid;
• and
• d. further warming the warmed pressurized fluid in a direct-fired vaporizer positioned downstream and in fluid flow communication with the unfired vaporizer coolant circuit to form a superheated stream.