Patent · US Active

Azimuthal cement density image measurements

US9057795B2 · kind B2 · utility

2Cited by

51References

22Claims

0Family size

Assignee

EXXONMOBIL UPSTREAM RESEARCH COMPANY · US

Inventors

Pingjun Guo · Bellaire, US
Richard J. Smith · Batavia, US
Thomas J. Boone · Ann Arbor, US

Key dates

Filing date	May 15, 2014
Grant date	Jun 16, 2015
Priority date	—
Expiry date	May 15, 2034

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/005
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Well logging method and logging tool for measuring cement density and thickness at different azimuth angles for a cemented, cased well. The method uses a gamma source, a short-spaced detector, a long-spaced detector, and preferably a backscatter detector, where the detector-to-source spacings are designed for calculating (93) thickness and density of the cement annulus (94) from the detector count rates (91).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.