Logging apparatus and method

Details Logging apparatus and method Logging apparatus and method

1986-06-11

1989-05-09

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

With drill or drilling

250266, 250264, G01V 512

Patent

active

048291765

ABSTRACT:
A gamma radiation logging system utilizes a single fixed gamma ray source spaced from a plurality of detector means arranged in banks so that the readings of the detectors can be utilized individually and in combination to derive the formation density, mud density and borehole diameter. The subject invention is capable of making the above determinations in a while-drilling condition without requiring physical contact with the formation nor making assumptions regarding composition of the formation or requiring further information from secondary sources. Each detector generates an output signal proportional to the photons reaching the detector with the signals being used to determine formation density, mud density and borehole diameter individually and collectively.

REFERENCES:
patent: 4492865 (1985-01-01), Murphy et al.
patent: 4596926 (1986-06-01), Coope

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