Deployed for the first time in Pakistan, solution delivers efficiency

Overview

In a complex onshore drilling environment, a leading operator aimed to improve drilling efficiency, reduce nonproductive time (NPT), and reach section total depth (TD) in a single run. The operation required navigating complex lithology, which included a variety of rock types. It required a durable and high-performing bit solution. To meet these goals, the team implemented advanced drilling technology designed to deliver consistent performance across complex formations.

Challenge

United Energy Pakistan Limited (UEPL) encountered significant challenges while drilling the 12 ¼-in. section. These challenges included the need to maintain bit durability and achieve a high rate of penetration (ROP) through a complex sequence of shale, sandstone, claystone, and abrasive volcanic rock. Conventional bits often led to increased bit trips and operational delays. UEPL needed a reliable casing-while-drilling solution that could withstand harsh downhole conditions, minimize inefficiencies, and enable a smooth and efficient transition to the next drilling phase.

Solution

UEPL and Halliburton collaborated to engineer an innovative solution with the first implementation of a casing-while-drilling bit. Designed with an advanced cutting structure and a customized profile, this technology is engineered to maximize performance and help reach section TD. These features work together to deliver stability, durability, and drilling efficiency, while optimizing the cutting structure to handle both soft and hard lithologies.

Result

The casing-while-drilling bit improved drilling performance across multiple metrics. It reached an on-bottom ROP of 164.79 ft/hr, which was 37% faster than the offset well. The bit drilled 52 ft into the volcanic formation and reached TD without issues. The operation successfully ran the 9 5/8-in. casing to TD. In the next phase, the following bit completed the drill-out and continued section drilling without complications.

The casing-while-drilling bit has become the performance benchmark for the customer in the region. Due to its success, the customer expanded its use to additional locations and across various casing sizes. This approach saved valuable rig time, enabled record ROP to reach TD, and achieved a smooth drill-out.