Resources Contact Us Home
Nitrogen liquid to gas converter

Image Number 6 for United States Patent #4290271.

A flameless nitrogen liquid to gas converter for providing high pressure nitrogen as to treat oil and gas wells. A diesel engine prime mover drives hydraulic pumps and motors to pressurize nitrogen and actuate an air fan. Heat for converting the liquid nitrogen to gaseous nitrogen is obtained from the engine jacket water, the engine exhaust, and the hydraulic oil from the hydraulic pumps and motors. Additional heat can be obtained from the hydraulic oil system by increasing the hydraulic system pressure with a hydraulic pressure control valve. At least one of the hydraulic pumps and its driven hydraulic motor is in a hydraulic circuit which includes variable means for increasing the pressure in the hydraulic circuit, a hydraulic oil-air heat exchanger, and a hydraulic oil reservoir. Hydraulic fluid from the other pumps and motors is transmitted through the hydraulic oil-air heat exchanger. The system includes an in-line heat exchange system in series in the air flow from upstream to downstream in the following order: hydraulic oil-air heat exchanger, engine water-heat exchanger, engine exhaust-air heat exchanger, nitrogen-air heat exchanger, and an air suction fan.

  Recently Added Patents
Combined imaging and radiation therapy
Sporting goal practice screen
Vacuum cleaner
Mask blank, transfer mask, and film denseness evaluation method
Clock face
Phosphor adhesive sheet, light emitting diode element including phosphor layer, light emitting diode device, and producing methods thereof
Information terminal, setting information distribution server, right information distribution server, network connection setting program and method
  Randomly Featured Patents
Combination stun gun and flashlight
Photosensor, manufacturing method thereof, and liquid crystal display including a photosensor
Multi-tool technology
Purified extract of uvaria brevistipitata and a process for obtaining the purified extract therefor
Nail gun with rapidly attachable and detachable magazine assembly
Combined disc player, amplifier, tuner and audio player
Miniature oxygen concentrators and methods
Audio-active communication stations, communication method and communication system with audio-active communication stations
Method and apparatus for planarizing semiconductor device
Dense cordierite containing manganese