N&N Drilling - Model W Series - Steel Casing - Brochure

“W” series steel casing offers the extra strength of double butt joints and added ease in cleaning threads. Out casing is flush threaded inside and out and, because of it’s “w” series design, it does not require the use of coupling. The outside diameter of each size casing will fit the hole drilled by the next larger size core bit and dimensional design also allows one size of casing to fit within the next larger size.