Inventors:
Sam G. Gibbs - Midland TX, US
Doneil M. Dorado - Missouri City TX, US
Kenneth B. Nolen - Midland TX, US
Eric S. Oestreich - Richmond TX, US
Jeffrey J. DaCunha - Midland TX, US
Assignee:
Lufkin Industries, Inc. - Lufkin TX
International Classification:
G01V 1/40, G06F 17/40
US Classification:
702 6, 702187, 702188, 702189
Abstract:
An instrumentation system for assessing operation of a reciprocating pump system which produces hydrocarbons from a non-vertical or a vertical wellbore. The instrumentation system periodically produces a downhole pump card as a function of a directly or indirectly measured surface card and a friction law function from a wave equation which describes the linear vibrations in a long slender rod. A control signal or command signal is generated based on characteristics of the downhole pump card for controlling the pumping system. It also generates a pump and well analysis report that is useful for a pump operation and determination of its condition.