Smart Well Intervention (X-intervention): A Wireless Robotic System for Tool Deployment and Data Acquisition

Abstract

Well intervention operations are fundamental to sustaining hydrocarbon production throughout the lifecycle of oil and gas wells. Conventional intervention technologies — including slickline, electric-line wireline, coiled tubing, and pipe-conveyed logging — are constrained by their dependency on continuous surface connections, limited reach in deviated and horizontal wells, and significant logistical complexity in offshore and remote environments. This thesis presents the conceptual design and analytical feasibility assessment of the X-Intervention robot, a proposed wireless, battery-powered, autonomous downhole intervention system. The X- Intervention concept integrates an adaptive eight-wheel drive mechanism, a hybrid spring- hydraulic gripping system, a Binary Phase-Shift Keying (BPSK) acoustic telemetry channel, and a dual-mode data acquisition strategy to enable autonomous navigation and intervention across vertical, deviated, and fully horizontal well trajectories. Analytical evaluation across five representative well scenarios — including High-Pressure High-Temperature (HPHT) conditions of 175°C and 15,000 psi — yields predicted traversal speeds of 7.2–18.0 m/min, gripping force accuracy within ±2.6%, acoustic uplink rates of 78–95 bps, and operational endurance of 8.0– 9.5 hours per charge cycle. No physical prototype was constructed; all performance figures are analytically derived from established engineering principles and published subsystem data. The findings provide a technically coherent and analytically validated foundation for future experimental development of autonomous downhole robotic intervention systems