Method for measuring the thermal conductivity of well casing...

Details Method for measuring the thermal conductivity of well casing... Method for measuring the thermal conductivity of well casing...

G - Physics

01

K

354/29, 73/65

G01K 1/20 (2006.01) G01K 7/22 (2006.01)

Patent

CA 1051685

Abstract of the Disclosure A method for measuring the thermal conductivity of well casing in situ. The instrument consists of a probe several feet in length lowered into a well and decentralized so that it main- tains contact with the casing wall. Two temperature sensors situated adjacent opposite ends of the probe are thermally insu- lated from an electrically heated intervening portion of the probe body. The probe is moved from one depth to another at a constant predetermined velocity, and the sensors continuously measure the temperature of the casing wall before and after pass- age of the heated probe portion thereover. The effective thermal conductivity of the casing is directly proportional to the flux applied by the heater and inversely proportional to the tempera- ture change as the heater passes a point along the casing.

252032

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