The growth of coiled tubing, and the benefits of thinking small again ///

In 1962, the first fully functional CT unit (CTU) was developed for the purpose of washing out sand bridges. Throughout the late 1960s, and into the 1970s, service providers continued to improve their designs and developed equipment for CT sizes that ranged primarily from ½-in. to 1-in., outside diameter (OD). By the mid-1970s, more than 200 of the originally designed CTUs were in service. By the late 1970s, several new equipment manufacturing companies started improving CTUs and injector head designs.1 Today, the service has evolved into a multi-billion-dollar global industry.2