Expandable profile liner technology for mitigating lost circulation and wellbore instability in geothermal drilling

This research presents a comprehensive review of lost circulation and wellbore instability challenges in geothermal drilling, complemented by an original case study demonstrating the application of Expandable Profile Liner Technology (EPLT). The review synthesizes and analyzes current mitigation strategies, highlighting their limitations in complex geothermal environments. In response to the inadequacies of traditional methods and the imminent risk of well abandonment, EPLT was implemented as an innovative solution. The case study of the J-1 well demonstrates EPLT's novel application in severe lost circulation conditions, showcasing its ability to effectively seal large fractures and high-permeability zones without reducing wellbore diameter and breakthrough — a common limitation of conventional techniques. Quantitative analysis reveals significant improvements in drilling efficiency, wellbore stability, and cost-effectiveness. This research contributes to the field by introducing EPLT as a groundbreaking approach to lost circulation management and wellbore strengthening in geothermal drilling, potentially revolutionizing industry practices and enhancing drilling performance in high-temperature environments. •Comprehensively analyzing lost circulation and wellbore instability challenges in geothermal drilling.•Effectively addressing severe lost circulation with EPLT while preserving well diameter.•Demonstrating EPLT's effectiveness in handling severe lost circulation and collapse formations through J-1 well case study.•Reducing downtime and drilling costs with EPLT, enhancing geothermal project economics.