Hinged Welded Semi-Rigid Bow Spring Centralizer
COS’s Hinged Welded Semi-Rigid Bow Spring Centralizers are designed to deliver high restoring force and consistent standoff in even the most demanding wells. By combining the strength of rigid centralizers with the flexibility of spring bows, they provide superior casing centralization and effective mud removal, ensuring a high-quality cementing job.
Key Benefits
- Higher restoring force than non-welded designs → better casing standoff
- Semi-rigid double-crested bows maintain strength while compressing to pass through tight spots
- Reinforced end collars for maximum structural durability
- Corrosion protection with iron phosphate + polyester powder coating
- Shipped in half-assembled condition to reduce freight and storage costs
Features
- Bows welded to end collars with extra low-hydrogen electrodes for ultimate strength
- Integral hinge design stays intact under extreme downhole stresses
- Available in four standard bow heights to optimize starting and restoring force
- Built to API 10D standards for quality and performance assurance
- Available in 2 7/8” to 30” (special/custom sizes available on request)
Applications
- Deviated and horizontal wells needing high standoff and restoring force
- Wells with tight restrictions or irregular boreholes
- Cementing operations where durability and uniform performance are critical
