| Customization: | Available |
|---|---|
| Certification: | ISO 9001:2000, ISO 9001:2008, API |
| Surface Treatment: | Spray-Paint |
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Straight Vane Roller Casing Rigid Centralizer consists of rigid body, on which machined spiral blades.
There are modified alloy steel, fully heat treated rollers fixed on every spiral blades. Because of rigid body and rolling friction between the rollers and inside of well or casing. The capability of the roller Centralizer is better than others of all. Roller/Wheeled centralizers are mainly used for big high Roller, high deviated wells and horizontal wells, to centre casings.
Roller Casing Rigid Centralizers can also remove wellbore cake and improve mud replacement efficiency etc.
Roller Casing Rigid Centralizers provide superior wear resistance and have been proven to remain functional throughout the life of the well and can aid in casing/tubing retrieval.
Precision-machined inside diameter fits over the casing through the complete API tolerance range, providing excellent rotational performance in mud.
When running casing through open hole, the system's smaller roller-contact area reduces the risk of differential sticking and maintains standoff .
The roller/axle relationship ensures that axle shear stresses remain within elastic limits, preventing permanent deformation.
Axles are crimped in place, eliminating the welding process, while ensuring the rollers cannot break free and fall into the wellbore. 
The system's high-quality construction materials improve high-pressure/high-temperature capabilities.
Roller Casing Rigid Centralizers are available in sizes 4½" to 20".
Any special sizes are available on request.
Horizontal wells
Deviated wells
Features:
Available with straight blade centralizer and spiral blade centralizer
Cast steel, cast aluminum and light weight casing rigid centralizer are available
Easy to install
Can move on casing freely, also can be fixed on casing by tighten screws.
Available Size:
4-1/2″ to 20″
Any special sizes or combination can available on request
These are generally shipped in half assembled condition for economy in shipping and storage costs.
| Specifications | In-Dia(mm) | Wall Thickness (mm) |
Height(mm) | Total height(mm) | Largest Dia(mm) | Spring Number |
| 5-1/2"*8-1/2" | 142-148 | 3-5 | 55 | 650 | 225 | 5 |
| 7"*9-5/8" | 181-186 | 3-5 | 55 | 650 | 255 | 6 |
| 7"*8-1/2" | 181-186 | 3-5 | 55 | 650 | 235 | 6 |
| 8-5/8"*12-1/4" | 223-228 | 3-5 | 55 | 650 | 330 | 8 |
| 9-5/8"*12-1/4" | 250-255 | 3-5 | 55 | 650 | 330 | 8 |
| 10-3/4"*12-1/4" | 274-276 | 3-5 | 55 | 650 | 330 | 9 |
| 13-3/8"*17-1/2" | 342-347 | 3-5 | 55 | 650 | 450 | 11 |
| 18-5/8"*24 | 476 | 3-5 | 55 | 600 | 610 | 12 |
| 20"*26 | 510 | 3-5 | 55 | 600 | 660 | 12 |
Centralizers are an integral part of the cementing process. They provide the mechanism that centers the casing in the hole and allows uniform cement flow around the casing to help protect it at all points. Several styles of centralizers are available for matching different well specifications and hole sizes, including turbulence generating designs that help clean the annulus and distribute the cement more evenly and uniformly. All models offer ample clearance for fluid passage and are extra effective in centering the casing, even in highly deviated holes and improve cement flow by reducing the effects of channeling.
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