An extended-reach well in the Gulf of Mexico had a lower completion design that required installing stand-alone screens across the 1,500-m [4,900-ft] horizontal interval. The well was characterized by complex geometry and severely unstable openhole conditions. TD was at 5,800 m [>19,000 ft], 67° inclination at the liner hanger setting depth transitioned to 90° in the horizontal section, and the well featured localized dogleg severities (DLS) up to 4.31°/30 m [100 ft]. These challenges are inherent to extended-reach installations in the region’s demanding environment, significantly increasing execution risk and operational complexity.
The goal was to run the liner to target depth while minimizing formation surge and mitigating the risk of losses during deployment. These risks were intensified by the low fracture gradient and extended openhole interval, which imposed strict limitations on equivalent circulating density (ECD) and hydraulics. An attempt by a third party had led to a stuck liner and a running tool lost in hole, necessitating a sidetrack and resulting in more than 30 days of NPT. The operator was seeking a liner hanger system that would ensure a controlled and reliable installation.
The Xcelis high-performance liner hanger system is tailored for complex well environments. A superior bypass area minimizes ECD effectively, and the system’s compact design enables precise positioning for entering the high-angle section of a well. In addition, high operational torque capacity across the entire running string ensures reliable performance. Sustained engagement and close follow-up, supported by multiple technology workshops and technical meetings, convinced the operator to approve the first installation of the Xcelis system in the region.
The liner and screens were run to target depth, overcoming restrictions in the openhole section with the help of circulation and reciprocation. The liner hanger was set and the collet running tool (CRT) released as planned. Because of the well deviation and in accordance with prejob simulations, the liner top packer was subsequently set by rotating at 15 rpm.
The robust high-performance liner hanger system, comprehensive engineering involvement during job design and preparation, rigorous planning, and continuous real-time support while running in hole proved to be key differentiators, reinforcing SLB’s leadership in complex well construction solutions.
