G - Physics – 01 – V
Patent
G - Physics
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G01V 3/18 (2006.01) E21B 47/00 (2006.01) E21B 47/12 (2006.01) G01N 17/00 (2006.01) G01N 17/02 (2006.01) G01V 3/22 (2006.01)
Patent
CA 2142660
A tool for monitoring corrosion levels within a wellbore particularly suited for remote monitoring over extended periods. The monitoring tool utilizes a thin wall electrical resistance type corrosion sensor to determine rate of metal loss within the wellbore. The corrosion sensor is preferably made of the same material as the production tubing or drill pipe of the well and is positioned to allows the fluid within the wellbore to flow over the sensor at the same rate as the fluid flows over the tubing. A reference element is incorporated into the corrosion sensor to provide primary temperature compensation. A temperature sensor provides temperature data and allows for secondary temperature compensation for the corrosion sensor. A central processing unit reads and stores the data from the three sensors into solid state memory. The probe records data at programmable time intervals. Upon retrieval of the probe from the wellbore, the probe may be connected to a computer for downloading of the raw data and subsequent analysis.
Maciejewski Walter J.
Powell Steven W.
Sweetman Budd
Waterman David K.
Macrae & Co.
Rohrback Cosasco Systems Inc.
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