Science Fair Project Encyclopedia
Nodding donkey
A nodding donkey is the overground drive for a submersible pump in a borehole. 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 between 5-40 litres of petroleum-water mixture at each stroke. A 2-inch wide metal rod connects the head to the pump, located thousands of feet underground in the oil reservoir. This system is also commonly referred to as a beam pump, rod pump, grasshopper, pump jack, or jack pump. This type of arrangement is commonly used in onshore applications for relatively low-production wells.
09-23-2007 01:00:40
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details