Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2008-10-28
2011-12-06
Swarthout, Brent (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C137S551000, C137S552000, C137S487500, C137S624120, C073S168000, C073S862325, C340S605000
Reexamination Certificate
active
08072343
ABSTRACT:
A local logic solver that operates with a local smart valve controller to control, test and monitor performance characteristics of a local field-mounted emergency isolation valve device, outputting a local indication of trouble on the device, which is mounted in the field away from the facility's central control panel for the process. The local logic solver includes a recording function and memory for retrieval of detected faults that are time-stamped and recorded locally to generate documentation and to track the elapsed time, starting when the degraded state of the device was detected and first signaled as a problem; other performance data is also recorded. Accordingly, the operation of the overall system is simplified by eliminating the need for an external computer to diagnose any problems. A local control panel preferably includes pushbuttons and lights used during routine operations of the valve and a fault indicator light substantially adjacent to or in close proximity to the device being monitored to alert personnel of detected faults.
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Abelman ,Frayne & Schwab
Saudi Arabian Oil Company
Swarthout Brent
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