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:
Nov. 06, 2018
Filed:
May. 16, 2014
Schlumberger Technology Corporation, Sugar Land, TX (US);
Robert van Kuijk, Le Plessis Robinson, FR;
Ram Sunder Kalyanaraman, Vaucresson, FR;
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
Systems, methods, and devices for evaluating proper cement installation in a well are provided. In one example, a method includes obtaining acoustic cement evaluation data points and processing the acoustic cement evaluation data points using a solid-liquid-gas model to assign at least some of the acoustic cement evaluation data points to a material of solid, liquid, or gas in an annulus of the wellbore behind the casing. The solid-liquid-gas model includes a tight solid-liquid-gas model in which a gas threshold range is not directly adjacent to a liquid threshold range and/or a solid-liquid-gas model that considers flexural attenuation when a pulse-echo-derived acoustic impedance is below an evanescence point.