Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system
Reexamination Certificate
2004-01-20
2009-12-15
Shechtman, Sean P (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Mechanical control system
C700S014000, C700S028000, C702S012000, C702S045000, C702S188000, C137S002000
Reexamination Certificate
active
07634328
ABSTRACT:
An arrangement which utilizes an inexpensive flap valve/flow transducer combination and a simple local supervisory control system to monitor and/or control the operation of a positive displacement pump used to extract petroleum from geologic strata. The local supervisory control system controls the operation of an electric motor which drives a reciprocating positive displacement pump so as to maximize the volume of petroleum extracted from the well per pump stroke while minimizing electricity usage and pump-off situations. By reducing the electrical demand and pump-off (i.e., “pounding” or “fluid pound”) occurrences, operating and maintenance costs should be reduced sufficiently to allow petroleum recovery from marginally productive petroleum fields. The local supervisory control system includes one or more applications to at least collect flow signal data generated during operation of the positive displacement pump. No flow, low flow and flow duration are easily evaluated using the flap valve/flow transducer arrangement.
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SPE 62865, “Marginal Expense Oil Well Wireless Monitoring,” D.Nelson, H.Trust, Society of Petroleum Engineers, 2000.
Medizade Masoud
Ridgely John Robert
Edmondson J. Curtis
Shechtman Sean P
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