Gamma analysis of cement

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United States of America Patent

PATENT NO 9726623
SERIAL NO

15126484

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Abstract

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A method and logging tool for evaluating the cement behind casing. In an embodiment, a collimated source emits gamma rays at selectable elevation angles. A fixed collimated detector received reflected gamma rays. Reflected calibration gamma rays are measured in a wellbore section having a cement layer of known condition. Backscattered evaluation gamma rays are measured in a section of wellbore to be analyzed and are compared with the backscattered calibration gamma rays to provide an indication of the quality of the cement layer at that location.

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Patent Owner(s)

  • HALLIBURTON ENERGY SERVICES, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Guo, Weijun Houston, US 82 291
Luo, Da Houston, US 7 23

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