Logging device having bimetallic insulating flask

Details Logging device having bimetallic insulating flask Logging device having bimetallic insulating flask

1985-05-28

1987-09-15

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, G01V 504

Patent

active

046941665

ABSTRACT:
A logging device is disclosed for utilization in the detection of low energy photons. The logging device includes a sonde suitable for insertion into a wellbore. An insulating storage vessel is disposed within the sonde and serves to insulate a photon detection device and its associated electronic circuitry. The insulating storage vessel is constructed utilizing an inner and outer cylindrical shell. Each shell is constructed utilizing a low thermal conductive metallic material such as stainless steel or titanium and each shell includes at least a portion constructed utilizing a low density material having a high photon transmission property wherein low energy photons may be detected by the photon detection device within the insulating storage vessel. In a preferred embodiment of the present invention, an aperture is provided in the sonde which includes a plug of low density, low atomic number material wherein low energy photons may penetrate the sonde.

REFERENCES:
patent: 4109522 (1978-08-01), Thompson
patent: 4200199 (1980-04-01), Perkins et al.
patent: 4399919 (1983-08-01), Posnansky et al.
patent: 4568830 (1986-02-01), Stromswold et al.
"McGraw-Hill Dictionary of Scientific and Technical Terms", 2nd ed., McGraw-Hill, Inc., New York, 1978, p. 916.

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