Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2006-02-27
2008-11-11
Thompson, Kenneth (Department: 3672)
Wells
Processes
With indicating, testing, measuring or locating
C166S303000, C166S272300, C166S272700, C166S105000
Reexamination Certificate
active
07448447
ABSTRACT:
An automatic control system that protects downhole equipment and surface equipment from high temperatures resulting from the breakthrough of injection vapor. The system operates to derive an estimate of the temperature of production fluid at a location upstream from the downhole equipment. An alarm signal is generated in the event that this temperature exceeds a threshold temperature characteristic of injection vapor breakthrough. Electric power to the downhole equipment is automatically shut off in response to receiving the alarm signal. A bypass valve selectively directs production fluid to a bypass path. The system operates to derive an estimate of the temperature of the production fluid at a location upstream from the surface equipment. An alarm signal is generated when this temperature exceeds a threshold temperature characteristic of injection vapor breakthrough. The bypass valve is automatically controlled to direct production fluid to the bypass path in response to receiving the alarm signal.
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Galloway Bryan P.
Sangalli Diana
Schlumberger Technology Corporation
Thompson Kenneth
Wright Daryl R.
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