The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2019
Filed:
Apr. 21, 2015
Applicant:
Halliburton Energy Services, Inc., Houston, TX (US);
Inventors:
Yike Hu, Houston, TX (US);
Weijun Guo, Houston, TX (US);
Assignee:
Halliburton Energy Services, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V 5/12 (2006.01); E21B 47/00 (2012.01); E21B 47/08 (2012.01); E21B 33/14 (2006.01);
U.S. Cl.
CPC ...
G01V 5/125 (2013.01); E21B 47/0005 (2013.01); E21B 47/082 (2013.01); G01V 5/12 (2013.01); E21B 33/14 (2013.01);
Abstract
A method for cement evaluation may include generating a gamma ray, from a radioactive source, into cement disposed between a casing and a geological formation. Photons reflected from the geological formation and the cement are detected on a gamma detector having a collimator. A detector-to-source distance, a collimator angle, and/or a collimator diameter are set to provide an energy spectra independent of the geological formation. The quality of the cement may be determined based on the energy spectra of the detected photons.