Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: The Ett-C, An Improved Corrosion Inspection Tool
Author: G. S. Smith
Source: American Gas Association 1980
Year Published: 1980
Abstract: The ETT-C (Electromagnelic Thickness Tool) is a recently developed casing inspection tool. Its predecessor, the ETT-A, has been in service for a number of years and has found great utility in evaluating large scale or average casing wall conditions. The ETTA makes a single measurement which is dependent on both casing wall thickness and magnetic permeability. The dependence upon magnetic permeabiiity has proven a major limitation. The ETT-C overcomes this limitation by measuring and compensating for magnetic permeabiiity. The design also includes a sensitive electronic caliper which is used to monitor inside-diameter variations in casing. The principle of the multiple-coil, multiple-frequency ETT-C system is summarized, and applications examples from field testing experience are discussed. The tools ability to distinguish magnetic permeability from wall thickness changes is demonstrated. The correlation and significance of correlation of the ETT-C and PAT (Pipe Analysis Tool) logs are also presented and discussed.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.