UROS Centralizer

UROS Centralizer

The Centek UROS® is a unique, radically designed, offset bow centralizer offering reduced drag on RIH in under reamed wells and washed out sections, where the main consideration is passage through previous set casings and expansion to nominal ODs.

Like the S2, the UROS is a robust, ultra-high-strength, one-piece construction bow spring centralizer with no weak points and with the flexibility to absorb both axial and radial loading. The UROS shows significant reduction on initial insertion forces as well as substantially reduced running forces through the previous set casing. Once through this compressed stage the unit will revert to gauge, maximizing stand-off with zero drag.

Centralizing enlarged or under-reamed sections

Under Reamed or enlarged well sections create a number of engineering issues which affect the RIH performance due to the bows being ‘squeezed’ while passing through smaller ID of the previous set casing. These are:

  • Reduced initial insertion forces
  • Reduced accumulated restart forces
  • Reduced running forces, accumulated
  • No loss of S/O

The UROS is a flexible bow spring centralizer designed to go through long sections of smaller previous casing and to open out into a larger open hole size, providing good stand-off performance.

Flex rating

We grade our centralizers using a rating of flexibility. The UROS centralizer is designed to be ultra-flexible to ease the string to TD and has the highest flex rating of all our centralizers. 


Wash Out sections


UROS centralizers are available in sizes from 5" to 20"

For more information talk to our Global Sales team today or use our Product Selector Tool to find the right product for your application

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