Petromac saves 27 hours of Rig Time and prevents differential sticking on a 3700psi overbalance well in Kuwait

Kuwait Oil Company (KOC) faces significant risk of the wireline tools getting stuck whilst achieving their formation testing objectives in their deep gas fields, where overbalance can regularly exceed 3500psi. To mitigate this risk, KOC, like many other operators, prefer to run the wireline tools on drill-pipe. However, drill-pipe conveyance operations are very time-consuming and add significant operational and HSE risks. Petromac’s Tool Taxis were proposed as a safer and more efficient solution. Taxis orient both themselves and the tools, which ensures the contact area with the borehole wall is limited to only the edges of the wheel. A contact area of only 1sq.in per Taxi, coupled with a very low drag coefficient of 0.03, means that the force required to dislodge a stuck sampling toolstring is greatly reduced, when compared to using conventional rollers or standoffs. A recent operation in this field, in a near vertical well, was planned to take 66 hours using drill-pipe conveyance. Petromac completed the operation in 39 hours. Deploying MDT or ORA tools using Petromac technology, instead of drill-pipe conveyance, ensures an efficient, sticking free operation Fig2: 27 hours of rig time savings with minimal risk achieved by using Petromac conveyance 66 39 27 Fig1: With a very low drag coefficient of 0.03, MDT taxis allow minimal tool contact with the borehole and let the toolstring “roll” off a point, greatly reducing the force to free a stuck toolstring.