RAC-31 | 3-1/2” Five Arm Mid Roller Centralizer

RAC-31 is a 3-1/2″, 5-Arm roller centralizer. This centralizer has feed-through wiring to be used with the DSS HSR-30 or HSR-35 cement bond tool. The RAC-31 can be installed in the tool field joint between the Sonde and the GR/CCL section to provide superior centralization even in highly deviated or completely horizontal wells. The 5-arm configuration lends itself to better centralization in the borehole, which is essential for accurate and repeatable cement bond measurements. This centralizer can be equipped with an optional extension kit to make it work in large casings (up to 20″). The wheels and axles are hardened for longer service life.

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Applications

For accurate centering of logging and production tools
Used in vertical, deviated, or horizontal wells
Prevent tools from wearing
Normal or harsh environment

Features

Rated for high-temperature and high-pressure environments
Electrical feed-through enables the electronic section to communicate with the sonde section
Five sets of arms with rollers provide a radial force and ultra low friction through the full operating diameter
Ability to convert rollers to larger sizes to increase rollers lifespan
Five spring loaded arms extend to fit required inner pipe diameters
Shims can be added to springs to increase centering force
Corrosion resistant alloys are used throughout the tool design
Easy to service and maintain

Specifications

Minimum Casing ID Small Wheels 8.89 cm (3.5 in) Force in 9.625” Casing without Shim
Force in 9.625” Casing with 2 Shims		 100 LBS
170 LBS
Minimum Casing ID Large Wheels 12.7 cm (5.0 in) Maximum Deviation 90 Degrees
Maximum Casing ID 34.92 cm (13.75 in) Tool Length (make-up) 99cm (39in)
Max. Temperature 204°C (400°F) Tool Length (shipping) 118.74cm (46.75in)
Max. Pressure 137.9 Mpa (20 000 PSI) Tool Weight
Arms & shaft material Stainless steel Top End Connector Contact Socket Go Female
Sub material TM3 & Aluminum Bronze Bottom End Connector Contact Pin Go Male

 

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