Oilfield coiled tubing is a continuous length of tubing that is wound onto a spool and used in a variety of well servicing operations. Increasingly, the coiled tubing unit is used for many well intervention operations and certain drilling applications.  Coiled tubing oilfield technology was initially developed for working on live, producing wells. More recently, this technology has gained wider acceptance for an expanding range of workover and drilling applications and for its ability to reduce overall costs. 

Coiled tubing is available in diameters of 0.75 to 4.5 in - 2 in. is the most common size. It may range in length from 2,000 to more than 30,000 ft [600 to 9,000 m]. The tubing is coiled in a single continuous length, thus precluding any need for making or breaking connections between joints. This permits continuous circulation while running in or out of the hole.

Coiled tubing is an important tool in many well servicing operations. It can be used to:

- Clean out wells by removing debris and other materials;

- Drill through obstructions in the wellbore;

- Stimulate production by perfing, fracturing, or acidizing the formation;

- Perform wellbore maintenance tasks like milling, cutting, and jetting;

- Monitor well performance via pressure measurements and other sensors.

Coiled tubing equipment and techniques present several advantages over those used in conventional drilling and workover operations. These advantages include rapid mobilization and rig-up, fewer personnel, smaller environmental foot-print and reductions in time associated with pipe handling while running in and out of the hole. Such capabilities are especially important in deep or high-angle wellbores. Coiled tubing can help the operator avoid the risk of formation damage inherent in killing a well by allowing continuous circulation during well intervention operations. These advantages may yield significant cost savings over conventional drilling or workover techniques. Elephant company offers the broadest, most advanced line-up of pumps suited for coiled tubing applications.