Gholamreza Monzaviyan noted that cement work is of special importance in drilling oil wells and is used for separating various layers of geological formations and to cover the walls of wells. He noted that National Iranian Drilling Companys specialists use the most modern equipment and techniques to do the operations with the highest qualitative criteria. “Such services are being presented within frame of a two-year contract with General Department of Drilling and the services are also carried out as turnkey,” he said.