Eneroil developed the “Solid Body Low Drag Roller Centralizer” as axial drag friction reduction tool.
The contact area of the rollers with the casing or borehole wall functions well in under pressured conditions, where the risk of differential sticking is high. The “Low Drag” centralizer with steel rollers helps to avoid ploughing through wellbore material that has settled, alleviating major drag problems in deviated and horizontal wells.
Casing, Liner and screens are being run into horizontal & extended-reach wells
Under –pressured formations may cause differential sticking
Run in conjunction with high-strength stop collars
SOLID BODY LOW TORQUE ROLLER CENTRALIZER
Model : S46
Solid Body Low Torque Roller Centralizers are specifically built to run in an inclined or horizontal section.
The rollers outside diameter are kept slightly larger than the centralizer blades outer diameter.
When casing equipped with Solid Body Low Torque Roller Centralizer runs into the deviated or horizontal hole, sliding friction between the casing and the borehole is converted into rolling friction.
In case of irregular hole diameter, the borehole wall has an impact force on the spiral centralizer during running casings, the use of rollers reduce this impact.
Torque reduction is provided by vertical alignment of rollers on the periphery of Roller Centralizer
Used when high torque is anticipated
Smooth rotation of the casing facilitates improved cementing and movement of casing to the bottom Run in conjunction with high-strength stop collars
SOLID BODY LOW TORQUE LOW DRAG ROLLER CENTRALIZER
Model : S47
Low drag low torque roller centralizer is provided with a combination of two sets of rollers on the vane, two rollers are placed axially in the centre, in addition, one horizontal roller on top and bottom are provided.
When centralizer moves inside the hole, vertical roller in the centre reduce drag forces and the horizontal roller on the top and bottom aids in reducing the torque to enable smooth rotation of the string.
Used when high torque Low Drag is anticipated
Low torque low drag roller centralizer’s enable smooth rotation and running of casing to the bottom.