• cementing

    Oil Well Cementing Functions, Classes and Equipment

        Functions of cement –  Restriction of fluid movement between permeable zones –  Provision of mechanical support of the casing string –  Protection of casing from corrosion –  Support of the well-bore walls to prevent collapse of formations The manufacture and composition of cement –  Raw material from calcareous and argillaceous rocks (limestone, clay, shale and slag). –  Dry raw materials finely ground and mixed in correction proportions (kiln feed). – Chemical compositions of dry mix determined and adjusted. – Kiln feed fed at a uniform rate in a sloping rotary kiln. – The mixture travels at the lower end. – Powdered coal, fuel oil or gas, fired into the kiln.…