Measuring and testing – Borehole or drilling – Downhole test
Patent
1987-03-12
1988-08-23
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
E21B 4706
Patent
active
047651830
ABSTRACT:
A first temperature sensor is carried by the drill pipe on a radially extensible arm for positioning the sensor at or near the face of the well bore for measuring the true temperature of the face. A second temperature sensor at an intermediate position on the arm measures the temperature of the drilling fluid near the location of the first sensor. The first sensor takes a plurality of readings over a predetermined period of time to detect changes in surface temperature. Both sensors transmit their measurements to a microprocessor, which employs the laws of multidimensional and transient heat transfer by conduction to calculate the true formation temperature.
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Vagelatos et al., True Formation Temperature Sonde, SPWLA Twentieth Annual Logging Symposium, Jun. 3-6, 1979.
Myracle Jerry W.
Rost Kyle W.
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