Scientists and engineers at the Research Center of Halliburton Company, Duncan, Oklahoma, are researching rock mechanics to improve recovery of oil and gas in fracturing operations and to apply their results to cementing practices, grouting, well logging, acidizing, and waste disposal. Attention will be focused upon rock in the 10,000 ft.-depth range where rock may be under stress conditions of 5,000 to 10,000 psi. The company hopes to be able to predict the orientation, direction, and extent of fractures at producing levels. They are using a 120,000-lb. Riehle universal testing machine in the project.