Nodding donkey

A nodding donkey is the overground drive for a submersible pump in a borehole.

Related Topics:
Submersible pump - Borehole

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A nodding donkey or horsehead pump is usually driven by an electric motor and 'nods' at a regular rhythm. Depending on the size of the submersible pump, it produces 5 to 40 litres of petroleum-water mixture at each stroke. A 2 inch (50 mm) diameter metal rod connects the head to the pump, located underground in the oil reservoir.

Related Topics:
Electric motor - Rhythm - Submersible - Pump - Litre - Petroleum - Water - Reservoir

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This system is also commonly referred to as a beam pump, rod pump, grasshopper, thirsty bird, pump jack, or jack pump. This type of arrangement is commonly used in onshore applications for relatively low-production oil wells.

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