• Manufacturing Process

    At Quality Tubing, we focus on improving every aspect of coiled tubing products used in downhole applications. Our manufacturing facility and headquarters manufactures coiled tubing to industry standards and your specifications. We have the only in-house production process in the coiled tubing industry, including a dedicated slitting facility for cutting the master coils into strips of appropriate widths, creating a more vertically integrated manufacturing process. From the slitter, the steel strips enter the strip make up lines where they are joined end-to-end every several thousand feet by using a special welding process, that we originally patented, called a bias weld. In this process, strips of steel are welded at a 45° angle so that when the tubing is formed, the joint forms a spiral-shaped connection, much more reliable than a tube-to-tube weld. Each bias weld is examined using digital radiography before the tube is formed. The bias welded, full length steel strip then enters the tubing mill where it is shaped into final tubing dimensions. Depending on the wall thickness and outer diameter, a completed coiled tubing string can be over 30,000 ft (9,144 m) in continuous length.

     

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