Patent ID: 9103190
Filing Date: 2015-08-11
Classification: E21B

Abstract:
1. An apparatus for the supply of inert gas at a well site, the apparatus comprising: one or more pressure vessels containing liquefied inert gas; a heat exchanger; one or more units of fracturing equipment connected to a manifold; a submersible pump in each of the one or more pressure vessels, each submersible pump being connected to supply liquefied inert gas to a supply line that passes through the heat exchanger; at least a heater on the supply line after the heat exchanger; the heat exchanger comprising a chamber with a fan for blowing ambient air across the supply line; the manifold being connected to the one or more units of fracturing equipment through proportional valves; and the supply line being connected to supply inert gas vaporized by the heat exchanger to the manifold.