US Patent 7530799 Long-stroke deep-well pumping unit
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Patent Inventor Names
Norris Edward Smith0
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Patent abstract
Methods and apparatus for driving a positive displacement pump disposed within a wellbore are disclosed herein. Embodiments of the present invention provide a drive mechanism for driving the downhole positive displacement pump. In embodiments of the present invention, the positive displacement pump is hydraulically driven and mechanically counterbalanced. The drive mechanism may be mechanically or electrically controlled, or may be controlled by a combination of mechanical and electrical controls.
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US Patent 07530799 Long-stroke deep-well pumping unit US Patent 7530799 Long-stroke deep-well pumping unit
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Patent Number
07530799
Patent Number
7530799
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US Patent 07530799 Long-stroke deep-well pumping unit
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Is a
Patent jurisdiction
Patent number
07530799
Date of patent
May 12, 2009
Patent application number
10903574
Date Filed
July 30, 2004
Patent primary examiner
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