Coil Tubing

Definition - What does Coil Tubing mean?

Coil Tubing is a long metal pipe that is spooled around a large reel. The tube is continuous instead of a jointed pipe. It is normally 1 to 3.25 in (25 to 83 mm) in diameter and is used for interventions or workover operations in wellbores and sometimes as production tubing in depleted gas wells. The tubing pipe is uncurled before it is pushed into a wellbore.

Petropedia explains Coil Tubing

The coil tubing is flexible enough to be wound on a large reel for transportation. It is injected into the existing production string, unwound from the reel and inserted into the well. Once the intervention operation or any other purpose of using coiled tubing is complete, it is pulled out from the well, put back on the reel and transported to a facility for storage and re-use in other oil and gas wells.

The length of the coil tubing depends on the pipe diameter and the spool size. The average length of a coiled tube used in an oil and gas well applications can range from 2,000 - 15,000 feet. Coil tubing enables all kinds of oil well operations including milling, drilling, and fracturing to be performed.

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