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Cowboy pumpjack |
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Free Computer Desktop Wallpaper Wall Paper Travel Photos Pumpjack Pump Jack Nodding Donkey Pumping Unit Horsehead Pump Beam Pump Rod Pump Grasshopper Thirsty Bird Jack Pump Canada North America Alberta Calgary Energy Fossil Fuels Oil and Gas Oil Industry Petroleum Stock Photos Fine Art Prints Image Licensing Stock Photography Photographs Fotos Pictures Pics Pix Images |
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Calgary, Canada - A pump jack, nodding donkey, pumping unit, or horsehead pump is the overground drive for a submersible pump in a borehole.
A pumpjack is usually driven by an electric motor and 'nods' at a regular rhythm. An electric motor (or, more rarely, a natural gas or diesel engine) turns a pair of cranks, which by their action raise and lower one end of the beam. The other end of the beam has a curved end, resulting in the shape likened to a donkey or horse's head. This converts the rotary mechanism of the motor to a vertical reciprocating motion to drive the pump shaft. The engineering term for this type of mechanism is a walking beam.
This system is also commonly referred to as a beam pump, rod pump, grasshopper, thirsty bird or jack pump. This type of arrangement is commonly used in onshore applications for relatively low-production oil wells.
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