Figure F30. Diagram of smart plug (instrumented bridge plug). A. Side view. B. Cross-sectional top view. PPC = pressure period counter/logger, DD = lithium thionyl chloride batteries (7 y capacity at 1 min sampling rate), 8B 7000-2 = paroscientific pressure transducer, MTL = Antares miniature temperature logger. Pressure case = 6 inch diameter, 8 inch OD, flange-mounted end caps with high-pressure port feed through bulkheads leading to pressure sensors. Top end cap fabricated with 3.5 inch OD EU 8RD thread for mounting to Baker-Hughes retrievable casing packer.
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