Abstract
Since 1991, technology, people, methodology and commitment have played an integral and prominent role in the advancement, development and application of coil tubing drilling (CTD) as an alternative to conventional drilling systems. Various geological formations have been successfully drilled with coil tubing drilling systems with the CTD technology and methodology being continually adapted, improved upon and evolved from its more traditional uses. This evolution of the coil tubing drilling process is one of the most exciting and fastest growing sections of the coiled tubing industry. Coiled tubing has become a competitive advanced drilling tool when used properly. A very impressive track record has been established in Western Canada where coiled tubing drilling technology has been utilized in mostly shallow gas and oil properties to squeeze profits out of what might normally be considered marginal properties. In this manner the coil has been used as an advanced economic drilling system in both vertical and horizontal wells. In 95% of the operations the wells have been drilled underbalanced to minimize formation damage, reduce drilling problems, and increase the rate of penetration. In many cases this process has eliminated the need for remedial stimulation of the wellbore.
