Carbon dioxide well injection method

Details Carbon dioxide well injection method Carbon dioxide well injection method

1984-08-20

1986-06-10

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

166 57, 166 91, 1663051, 166308, E21B 4325, E21B 43267

Patent

active

045937630

ABSTRACT:
A method for injecting carbon dioxide into a well is shown, in which carbon dioxide is supplied at the well site in a tank maintained at sufficient pressure to keep the carbon dioxide in the liquid state. As the carbon dioxide is withdrawn from the tank and transferred to the high pressure well pump, supplemental cooling is provided intermediate the tank and pump to maintain the carbon dioxide in the liquid state. The supplemental cooling is provided by passing the carbon dioxide withdrawn from the tank through a heat exchanger, the cooling effect being provided by separating a liquid-vapor stream from a predominantly liquid stream of carbon dioxide, expanding the liquid-vapor stream in the heat exchanger to cool the heat exchanger, and passing the predominantly liquid stream separately through the heat exchanger to cool the predominantly liquid stream. The expanded carbon dioxide vapor utilized in the heat exchanger is recompressed and recirculated to the tank, to maintain the tank pressure to avoid vaporization of the carbon dioxide between the tank and the high pressure pump.

REFERENCES:
patent: 2632302 (1953-03-01), Steele
patent: 3004601 (1961-10-01), Bodine
patent: 3195634 (1965-07-01), Hill
patent: 3213939 (1965-10-01), Records
patent: 3424254 (1969-01-01), Huff
patent: 3842910 (1974-10-01), Zingg et al.
patent: 4212354 (1980-07-01), Guinn
patent: 4390068 (1983-06-01), Patton et al.
patent: 4398604 (1983-08-01), Krajicek et al.

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