This new centralizer design represents a step-change in how bow-spring centralizers interact with both the casing and the borehole, combining practical improvements in run-in performance with predictable standoff for improved cementation. It is available across our high performance single piece centralizer range.
Talk to one of our Product Service Experts todayFusion technology is designed to be pulled through the wellbore or casing. Pull-in deployment reduces the risk of permanent bow deformation, ensuring a consistent restoring force and maintaining intended standoff once positioned in the well.
Protrusions around the end band allow for an internally positioned single stop collar within the centralizer. This configuration removes the potential for interference between stop collar screws and the borehole wall under high lateral deflection.
With this design, the risk of the collar becoming wedged under the bows during RIH is eliminated and the collar can rotate freely without colliding with the bows under high deflection. The result is a smooth, guided passage through tight spots, maintaining annular integrity and reducing the likelihood of casing damage.
This technology is available on S2, TUR and UROS product range.
High-deviation or dog-legged sections of the well often impose significant side forces on the casing string. In conventional assemblies, these forces can flatten bow springs and cause unwanted frictional contact between external fixings (e.g. stop collar screws) and the borehole wall.
S2 Fusion mitigates this by incorporating load-bearing protrusions formed into the centralizer end bands. These features become the contact interface at high deflection, allowing the casing to move smoothly through the borehole or through restrictions such as milled windows. As a result, recorded frictional drag during run-in is composed only of genuine side-wall contact, not mechanical interference.
The geometry of the S2 Fusion bows enables controlled flexing under load. Even at maximum deflection, contact between the end-band protrusions and the borehole wall ensures the bow’s spring force remains active without over-flattening. This behaviour delivers the dual advantage of a flexible bow spring (for ease of passage and reduced friction) with a guaranteed minimum standoff for more uniform cement placement.
This design also ensures that the tubular can be rotated or reciprocated freely at all times, a key requirement for effective mud displacement and cement bonding.
The protrusions are engineered to withstand significant lateral forces, ensuring deformation control without compromising bow elasticity. All testing has been conducted in accordance with API 10D 7th Edition, with results shown to exceed specification thresholds for restoring force, standoff, and insertion force
The design inherently guarantees a minimum cement sheath, providing a controlled flex point and measurable minimum standoff. Protrusion heights above the set-screw dimension remove the potential for screw contact or gouging which would increase drag.
The S2 Fusion centralizer offers a practical solution to the known limitations in traditional bow-spring centralizers. By combining a pull-in configuration, controlled bow deformation, and a single internal stop collar system, it reduces drag, eliminates mechanical interference, and preserves minimum standoff for improved cementation outcomes — without compromising on mechanical robustness.
The revolutionary S2 bow spring centralizer is a high-performance, single-piece solution specifically designed for challenging wellbores.
S2 Bow Spring Centralizer
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 starting and running forces in wells with under-reamed sections.
UROS Under-Ream Offset Bow Spring CentralizerSubmit your well details to request a tailored Centek simulation and receive expert product recommendations for your application.
The Centek Product Finder is your go-to tool for exploring our full range of centralizers and stop collars available worldwide. Designed to make product selection simple, it provides instant access to key dimensional and performance data, helping you compare options and identify the best fit for your well design.
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