Surface/downhole pressure recording system

Details Surface/downhole pressure recording system Surface/downhole pressure recording system

1994-07-19

1996-05-07

Eldred, J. Woodrow

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

3408563, 3408558, 3408539, G01V 300

Patent

active

055150390

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.

REFERENCES:
patent: 4216536 (1980-08-01), More
patent: 5243337 (1993-09-01), Beauducel et al.

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