System and method for monitoring and controlling nitrogen pumpin

Details System and method for monitoring and controlling nitrogen pumpin System and method for monitoring and controlling nitrogen pumpin

1993-06-25

1995-01-17

Kilner, Christopher

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62 491, 62 506, F17C 902

Patent

active

053816676

ABSTRACT:
A method and system provide automated, preferably electronic, monitoring and control of equipment used to pump and vaporize liquid nitrogen at an oil or gas well. The method comprises: pumping liquid nitrogen at the well; vaporizing pumped liquid nitrogen at the well; flowing vaporized nitrogen at the well; sensing temperature of the flowing vaporized nitrogen; sensing pressure of the flowing vaporized nitrogen; and automatically stopping the pumping of liquid nitrogen at the well when the sensed temperature is outside a predetermined temperature range or when the sensed pressure is outside a predetermined pressure range. A pre-stoppage warning can also be provided, and data about the vaporized nitrogen can be generated, displayed locally and transmitted remotely. A related system is also disclosed.

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