• Model NO.：roller centralizer
• Sample：Avaliable
• Vane：Stright Vane, Spiral Vane,
• Centralizers Type：Roller Centralizers
• Transport Package：Wooden Case
• Specification：4-1,2"~20"
• Trademark：ZS
• Origin：Henan
• Production Capacity：5000 Piece,Pieces Per Month

Basic Info.

Model NO. roller centralizer Sample Avaliable Vane Stright Vane/ Spiral Vane/ Centralizers Type Roller Centralizers Transport Package Wooden Case Specification 4-1/2"~20" Trademark ZS Origin Henan Production Capacity 5000 Piece/Pieces Per Month

Product Description

Roller Rigid Casing Centralizer
Available in sizes 4-1/2" to 20", custom size available
Run in inclined or horizontal section
Reducing this impact
Torque reduction is provided 

Main Feature of roller centralizers
The roller makes it to be the sliding friction instead of rolling friction when the casing is down, thus greatly reduce the friction between the casing and the borehole wall.
Roller/Wheeled centralizers are mainly used for big high Roller, high deviated wells and horizontal wells, to center casings.
 
Description of Spiral Vane Roller Centralizer
>>Spiral 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.

 Technical Parameters: 

Model	Style	Max OD, mm	ID, mm	Length, mm
ZSGF-4 1/2"*6"	I, II, III	145	116.5	200
ZSGF-5"*6"	I, II, III	145	129	200
ZSGF-5 1/2"*8 1/2"	I, II, III	205-210	142	200/300
ZSGF-6 5/8"*8 1/2"	I, II, III	205-210	171	200/300
ZSGF-7"*8 1/2"	I, II, III	205-210	181	200/300
ZSGF-7"*9 1/2"	I, II, III	225-235	181	200/300
ZSGF-7"*9 5/8"	I, II, III	225-235	181	200/300
ZSGF-9 5/8"*12 1/4"	I, II, III	300-305	248	200
ZSGF-13 3/8"*17 1/2"	I, II, III	430-435	346	200