The trend of increasing jack up drilling rig rates in 1996 and the fact that Atlantic Richfield Indonesia Incorporated (A.R.I.I.) has many wells on tripod platforms are the primary factors for ARII to find an alternative way to drill sidetrack wells on tripod platforms. One possible solution is Coil Tubing Drilling (CTD). This paper is a case study of Arco Indonesia's 1997-98 CTD pilot project describing the operation of CTD on these platforms. The focus of this paper will be on; rig up of surface equipment, operational overview and lessons learned for future wells using CTD on tripod platform wells.

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