Coiled Tubing Workover is a type of oil well intervention technique used as a competitive form of workover operations. This technique involves the use of coiled tubing. It can be used to perform milling and drilling operations, and also to crack the reservoir. It is a process in which a fluid is pressurized to a thousand psi at a definite point in the well to break rocks apart and allow the flow of products. If used in a proper way, the coiled tubing can perform any operation in the oil well.
A cost- and time-effective solution for well intervention operations employs coiled tubing. Instead of removing the tubing from the well, which is how workover rigs fix the problem, coiled tubing is inserted into the tubing against the pressure of the well and during production.
The coiled tubing is a continuous length of steel or composite tubing that is flexible enough to be wound on a large reel for transportation. The coiled tubing unit is composed of a reel with the coiled tubing, an injector, control console, power supply and well-control stack. The coiled tubing is injected into the existing production string, unwound from the reel and inserted into the well.
Coiled tubing is chosen over conventional straight tubing because conventional tubing has to be screwed together. Additionally, coiled tubing does not require a workover rig. Because coiled tubing is inserted into the well while production is ongoing, it is also a cost-effective choice and can be used on high-pressure wells.
Coiled tubing is a long metal pipe that is supplied spooled on large reels. Workover is any type of oil well intervention operation that involves various invasive techniques such as snubbing or coiled tubing. Coiled tubing is usually used to perform various operations identical to wirelining. Before workover operations, the well is required to be killed. The intensive nature of workover operations is not at all less than the abilities of drilling rigs. Coiled-Tubing Workover is a cheaper form of workover activities used to perform various milling and drilling activities.