News article posted on October 16, 2017
CTLGroup’s Sang Lee PhD, and Donald Broton wrote an article published in November’s Oilfield Technology that demonstrates how clinker microscopy, combined with other laboratory testing, such as X-ray diffraction (XRD), can be used as a quality control tool for oilwell cement production. Following is a brief excerpt from that article…
Class G cement, in accordance with standard 10A API (American Petroleum Institute), is one of the basic oilwell cements used in oilwell cementing. Oilwell cements require material characteristics and performance specifications quite different from the ordinary Portland cements that are used in conventional concrete construction.
Because of their specialised application and extreme exposure conditions, such as high temperature and pressure, oilwell cements require strict performance requirements for various aspects, such as thickening (setting) time, strength, high sulfate resistance, and consistency. In this article, a Glass G oilwell cement clinker is analysed microscopically to document the clinker mineralogy/microstructure, burning conditions, and their implications on the performance requirements. The purpose of this article is to demonstrate that clinker microscopy, combined with other laboratory testing, such as x-ray diffraction (XRD), can be used as a quality control tool for oilwell cement production.