Surface/downhole pressure recording system
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United States of America Patent
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-
May 7, 1996
Grant Date -
N/A
app pub date -
Jul 19, 1994
filing date -
Jul 19, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for the output of data on a two wire cable system from a downhole well tool which has a system with sensor devices, a processor, a clock, a memory and a voltage/current communications device which are all powered by a d.c. battery to a surface read-out where the downhole well tool is actuated for cable transmission of data during operation by an additional power source which is provided from a surface power source so that failure of the cable transmission does not affect the well tool collection of data.
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