 For highly deviated and horizontal wells, gravity may be insufficient for wireline logging.Roller stem and tractors can often overcome this disadvantage at greatly reduced cost, particularly on small platforms and subsea wells where coiled tubing would require mobilizing an expensive mobile drilling rig.The use of coiled tubing for these tasks is usually confined to occasions where it is already on site for another purpose, for example a logging run following a chemical wash.

Coiled tubing is often used as a production string in shallow gas wells that produce some water.