Abstract: Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

Abstract: Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

Abstract: Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

Abstract: A flame arrestor system includes a heat exchanger through which a cooling gas flow stream is directed. A zone adjacent the heat exchanger is susceptible to possible flame and through which the cooling gas flow stream is directed. A flame arrestor containing a passage-structure matrix is disposed between the zone and the heat exchanger to quench flame from entering the heat exchanger.

Abstract: A flame arrestor system includes a heat exchanger through which a cooling gas flow stream is directed. A zone adjacent the heat exchanger is susceptible to possible flame and through which the cooling gas flow stream is directed. A flame arrestor containing a passage-structure matrix is disposed between the zone and the heat exchanger to quench flame from entering the heat exchanger.

Abstract: A hand operated painting cart apparatus is disclosed. The hand operated painting cart apparatus includes a wheeled base comprising a frame, a front pair of wheels connected by a front axle, and a rear pair of wheels connected by a rear axle. The wheeled base including at least one basket. A spray-holster is configured to retain a paint gun to the frame. A fifth-wheel assembly attached to the frame. The fifth-wheel assembly includes a wheel that is configured to engage, and alternatively, disengage with the ground. A handle connected to the wheeled base includes a first-hand trigger and a second-hand trigger. The first-hand trigger is configured to disengage the wheel of the fifth-wheel assembly from the ground. The second-hand trigger is configured to operate a paint gun. The hand operated painting cart apparatus may be useful for painting straight and curved lines on a surface.