Downhole temperature measurements

Measuring and testing – Borehole or drilling – Downhole test

Patent

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Details

166250, E21B 4900

Patent

active

048115983

ABSTRACT:
An apparatus is disclosed for developing a temperature profile of a well. That apparatus has a spring bow centralizer, wherein the bow of the centralizer contacts the sidewall of the well, and it has a temperature probe attached to the underside of the bow opposite to a point of contact with the sidewall. In one embodiment, the temperature probe is attached to the underside of the bow with studs and a shim steel backing. That temperature probe is a platinum resistance thermometer surface sensor less than 0.05 inches thick coated with a polyimide insulator.

REFERENCES:
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patent: 2764024 (1956-09-01), Rumble
patent: 3014529 (1961-12-01), Graham
patent: 3164988 (1965-01-01), Cook
patent: 3363457 (1968-01-01), Ruehle et al.
patent: 3668927 (1972-06-01), Howell et al.
patent: 3874232 (1975-04-01), Hardison
patent: 3981187 (1976-09-01), Howell
patent: 4109717 (1978-08-01), Cooke, Jr.
patent: 4578785 (1986-03-01), Gelfand

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