OBS-2 Bow Spring Centralizer

OBS-2 Bow Spring Centralizer

The OBS-2 is our most cost competitive single piece, bow spring centralizer. It has been developed for onshore vertical, horizontal or deviated wells with build rates of less than 10O /100’ and horizontal sections less than 10,000 ft.

The OBS-2 is compliant with the API 10D standard. Its single piece construction provides strength downhole, while the proprietary heat treatment process makes the bows highly flexible.

The OBS-2 unit is shorter compared to the premium Centek S2 but maintains excellent flow by area to support of cementing best practice. And, due its smaller size, the OBS-2 can be delivered with up to 100% more product on the pallet, reducing transport and storage cost significantly, and gives it the lowest carbon footprint of any single piece centralizer 

Low carbon footprint

Features and benefits

  • Designed to exceed API 10D
  • Zero start and running forces
  • Good stand-off
  • Excellent fluid dynamics
  • Enhanced runability

Targeted applications

  • Onshore
  • Vertical, deviated and horizontal wells
  • Reach <10,000 ft
  • Build rates of <10 degrees / 100’

Stop collars

The OBS-2 has a corresponding range of high strength stop collars.

Performance ratings

Centralization and the ease of running casing is often a balance between strength and flexibility which combine to support, what we call, 'runability'. To help with product selection we've added a rating to all our products for flexibility, runability and inherent strength.



Available to suit casing sizes ranging from 4 1/2" to 14" ID.

For more information talk to our Product Service Experts today or use our Product Selector Tool to find the right product for your application

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