In previous offset wells in the Middle Indus Basin, the operator encountered issues with bit balling in the 17½-in section and hole instability in the 12¼-in section. The new well to be drilled was complex and required a high-performance drilling fluid to achieve the desired ROP without compromising hole cleaning, wellbore stability, inhibition of reactive clays, or casing operations. To address this challenge, the UltraDril Plus system with the UltraHib Plus inhibitor was selected for its exceptional performance, excellent inhibition, and cost-effectiveness.
The unique formulation of the UltraDril Plus system enabled effective inhibition and provided a stable borehole, resulting in improved drilling performance. This led to reduced drilling time and significant rig cost savings for the operator. UltraHib Plus inhibitor, an amine-based clay inhibitor, was used to maintain wellbore stability and prevent bit balling. As a result, the well was drilled to total depth in 8.96 actual days versus 16 planned days, saving 7 days of rig time. Throughout the operation, wellbore stability was maintained, minimizing risks related to well control and NPT. Using this solution was critical for successfully drilling this complex well, effectively balancing efficiency, safety, and stability.
