Under-reamed wells require centralizers to pass through the restricted internal diameter of previously installed casing before expanding into a larger open-hole section. This creates significant challenges for casing running, bow recovery and effective centralization.
Centek’s under-reamed bow spring centralizers are engineered to reduce starting and running forces while maintaining the strength and flexibility needed to return toward gauge in the enlarged wellbore. This supports improved standoff, fluid displacement and zonal isolation in complex well geometries.
The TUR centralizer combines a flexible bow profile with low starting and running forces and a large flow-by area. It provides an application-specific solution for under-reamed sections, washouts, deviated wells and extended-reach applications.
The patented UROS uses an offset bow configuration to further reduce the forces associated with passing through restrictive casing. Its ultra-high-strength single-piece construction is designed to withstand axial and radial loading before recovering in the open-hole section.
Both products can be evaluated using Centek’s well-planning and simulation capabilities to balance running forces against the standoff required in the target interval.
Explore the TUR and UROS ranges or submit your well details for an application-specific centralizer recommendation.
The Centek TUR bow spring centralizer is engineered for use in close-tolerance, under-reamed applications commonly found in some of the world’s most challenging offshore fields.
TUR Under-Ream Bow Spring Centralizer
The UROS centralizer features a patented offset bow design that significantly reduces start and running forces in wells with under-reamed sections.
UROS Under-Ream Offset Bow Spring Centralizer