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US 5,508,514 AGranted
Well logging device with a pad
OwnerAlan J. Sallwasser, Philippe Chevalier +1inventors
InventorsAlan J. Sallwasser, Philippe Chevalier, Kevin E. Eyl
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Abstract
The invention concerns a well logging device with a pad, characterized in that the pad has a nuclear sensor with a gamma ray source and two detectors separated by a space in the longitudinal direction, and a second sensor of different type located in said space, preferably a micro-resistivity sensor with electrodes.
Claims20
A well logging device including a pad, comprising:
- a) a gamma ray source;
- b) a first sensor comprising two nuclear detectors spaced apart in a longitudinal direction of the pad for detecting a first formation parameter;
- and
- c) a second, non-nuclear sensor located between the two nuclear detectors for measuring a second formation parameter.
1 more element
A well logging device for use in a borehole, comprising:
- a) a tool body;
- b) a pad moveably mounted on the tool body so as to be extendible in a radial direction for contacting a wall of the borehole;
- c) a gamma ray source located in the pad;
- d) a first sensor comprising two nuclear detectors spaced apart in a longitudinal direction of the pad for detecting a first formation parameter;
- and
- e) a second, non-nuclear sensor located between the two nuclear detectors for measuring a second formation parameter.
3 more elements
A well logging device for use in a borehole, comprising:
- a) a tool body comprising first, second and third body parts;
- b) at least one sensor in the first body part for measuring a first parameter;
- c) a pad moveably mounted on the second body part so as to be extendible in a radial direction for contacting a wall of the borehole;
- d) a gamma ray source located in the pad;
- e) a first pad sensor comprising two nuclear detectors spaced apart in a longitudinal direction of the pad for detecting a second parameter;
- f) a second, non-nuclear, pad sensor located between the two nuclear detectors for measuring a third parameter;
- and
- g) at least one sensor in the third body part for measuring a fourth parameter.
5 more elements
Dependencies are inferred from the claim text.