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The article discusses the steps for preventing ground water contamination. It states that site engineers must select a location uphill to prevent from any potential contamination source. It highlights the importance of proper selection of well casings, seals, screens, filter packs, and pump chamber casings which determine the efficiency of the well. It notes that well installers must disinfect all equipment and tools using a chlorine solution before any drilling operation.

The article presents the author's views on the importance of casing in constructing water well. He states that casing will prevent the collapse of water wells even if the bedrock is very near the surface. The author imparts that the problems associated in using a 2-inch casing is its ability to bent easily.

The article discusses the importance of casing wells, stating that cement acts as a seal between the borehole and the casing; and it also presents instructions on the placement of the cement.

The author discusses about Nominal Pipe Size (NPS), a standard sizing system for pipes, casing, and borehole used in drilling. The author also mentioned the Standard Dimension Ratio (SDR) a sizing standard developed by the American Society for Testing and Materials (ASTM). Information regarding the pipe's wall thickness, strength, and diameter, are discussed.

The article offers information on Certa-Lok PVC, a polyvinyl chloride (PVC) well casing for wells, from North American Speciality Products.

The article offers brief information on the Drill Systems CR series Dual-Rotary Casing-Advancement system from Errickson Equipment.

The article offers the authors insights regarding proper process in drilling oil wells. He states that various casings are being installed as the well drilling gets deeper. He mentions that parameters are being adjusted to account depth increase and formation changes in the next casing point. Moreover, the rig will drill to the total depth (TD) chosen by the operator and engineers upon the establishment of final intermediate casing.

The author discusses the improved efficiency for well drillers through flushing and screening of sand and clay in the U.S. He states that the set up of casing drilling must involve mud thinner additives and clay dispersant chemicals to remove drilling fluids from water bearing zones. The author notes that the migration of clay through a gravel-pack can be prevented by back-washing of the well.