Coiled Tubing: A chance to increase crude oil production
Coiled tubing has turned out to be a feasible method for old wells’ reactivation and new ones’ drilling. It is effectively used in shale oil wells with lower porosity and permeability
Oil wells intervention is done when it presents problems in reaching optimum production conditions, at the slightest hint that there may be a problem with a producing well and its bottom assembly, well intervention solutions are sought through coiled tubing.
There are a number of problems that can be developed in a producing well after it goes into production.
Failure of mechanical equipment, changes in production characteristics, plugging and increases in injection pressure are some examples of the events which may occur, requiring modification of the well in order to achieve optimal production; this is called “well intervention”.
There are a number of well intervention operations that can be achieved via coiled tubing. These include cleanout and perforating the wellbore, as well as retrieving and replacing damaged equipment, sand control and cementing operations are also performed.
Shale Oil and Gas wells represent big challenges for engineers in the industry, because of its porosity and permeability characteristic which make the crude-oil-extraction process complicated. This has led many companies to apply use coiled tubing for oil wells intervention, finishing, and reactivation.
About coiled tubing system
Coiled tubing is usually defined as a chain of continuous small diameter pipeline, which connects a series of surface equipment and it is associated with drilling, repair, completion and reconditioning of a hole. It can be used in ground and maritime environments.
This tubing is generally constituted of a special coal – steel alloy, which allows it to be handled as a Polyvinyl chloride (PVC) pipes, which possess pliability, resistance to fire and some other.