Coiled tubing is used for a range of oil and gas well operations. It is mainly used in drilling, work over, pumping, logging etc. This technology is becoming an economic substitute to conventional drilling as it is highly cost and time saving. Drilling with Coiled tubing allows incessant supply of the pipe into the hole without constant interruptions, whether it can be as a drill string or tubing. Nowadays, most of the wells drilled are deviated because oil & gas reservoirs can be exploited more efficiently through extended horizontal wells. Also, Extended reach drilling make economic as well as environmental sense by reaching different pockets without drilling lots of wells. Through ERD we can also construct multiple wells to drain a large area from a single surface location. Moreover, the reserve situated in a populated area and geographically harsh area can be thoroughly exploited using high angle extended reach deviated and horizontal well.

However in drilling high angle deviated and horizontal wells with coiled tubing, the motion of coiled tubing drilling is somehow restricted due to generation of high friction forces which lead to buckling inside the well. Another challenge using CTD for ERD is effective transport of drilled cuttings, as the complete string is in sliding mode while drilling. Apart from this there many challenges which drilling industry is facing in CTD usage with ERD.

The main aim of this paper is to synchronize CTD usage with ERDs. Here we have presented the benefits & challenges of CTD-ERD system which can be used to save time and cost as well as proposing the possible current solutions. Knowing the limits and appropriate usage of coiled tubing in ERDs will save lot of costs and has potential to revolutionize the existing drilling activity of whole exploration, production and geothermal sectors.

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