Operator reduces rig time using VersaFlex® Big Bore ELH system

Overview

After three unsuccessful attempts to install supplemental casing hangers, an operator needed a reliable liner hanger solution for a deepwater, subsea well. Supplemental casing hangers proved unreliable locating and sealing after three failed 16 × 20-in. supplemental casing hanger operations with 14, 9, and 7° inclinations. The VersaFlex® Big Bore expandable liner hanger (ELH) proved to be a reliable solution after its first successful installation in a higher 19° inclination, with no issues related to health, safety, and the environment (HSE), service quality (SQ) or nonproductive time (NPT).

Challenges

Landing and locating the supplemental casing adapter with the mating casing hanger proved to be unobtainable after three attempts. Thus, the operator required a liner hanger system that could act independently of the supplemental casing adapter and provide sufficient hang load capacity and liner top sealing capabilities. Additionally, a quick turnaround of new equipment was necessary to meet the drilling schedule. 

Solution

Halliburton proposed the VersaFlex Big Bore ELH as an alternative to the supplemental casing hangers. This solution offered a simple, robust, and reliable design. Additionally, Halliburton provided both the supplemental float equipment and liner wiping equipment. 

The VersaFlex Big Bore ELH system was designed to pass through most wellhead restrictions and create a reliable 360°  liner top seal with bidirectional anchoring, enabling high hang load capacities.

Result

The VersaFlex Big Bore ELH system was in installed in less than 1.5 hours. This successful first installation for this operator reduced rig time and helped avoid USD millions in remediation. If the system had been deployed in the previous three wells, it could have potentially eliminated 10 days of NPT in addition to unnecessary openhole exposure ad ballooning events.

Halliburton provided the operator with a viable solution completed within the specified timeline by competent field personnel. This operation demonstrated the superior performance and reliability of the VersaFlex Big Bore ELH system and opened the door to secure additional work with the operator.