HDSO Heavy Duty, Slip on Stop Collar

HDSO Heavy Duty, Slip on Stop Collar

The HDSO is a heavy duty, slip on stop collar developed for use in challenging wells where strength is a priority.

The HDSO is a high performance holding device able to withstand high axial forces in challenging well conditions.

Each HDSO stop collar is heat treated to increase strength and tempered for resilience. They are made from the same patented steel as our Centek heavy duty premium centralizers.


HDSO stop collars are developed as counterparts to the S2-HD heavy duty centralizer.

Features and benefits

  • High holding force
  • 2 offset rows of M12 socket set screws
  • Fitment tested to up to 50 lb-ft torque
  • Anti-vibration screw retention
  • Maximum performance on casing grades up to P110

Target applications

  • Demanding well conditions


Performance ratings

Stop collar performance depends on the ability of the stop collar to hold the centralizer in place. This aids 'runability' and is measured by holding force and integral strength. To help with product selection we've added a rating to all our stop collar products for runability and strength.


HDSO stop collars are available in sizes from 4 1/2" to 24"

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

Back to top

Related Products

Talk to us about the difference we can make to your business.

Let’s get started