Rotating Cement Heads Improve Results of Zonal Isolation in Colombia
This paper describes the path to implementation of full casing rotation during primary cementing jobs.
In the current challenging drilling environment, effective annular zonal isolation is required for long-term integrity. Among proven cementing practices, casing rotation has been widely applied to liners but not as commonly to full casing strings. The complete paper describes the use of custom-fit rotating cement heads (RCH) to improve cementing results.
Cementing Practices in Colombia
The following methods of cementing, described in detail in the complete paper, are applied currently in Colombia:
- Preflushes and spacers
- Slurry design
- Casing standoff
- Borehole conditioning
- Mud circulation and conditioning
- Casing movement during the cement job
- Monitor job parameters compared with design
- Pressure testing and surface-equipment installation
Most of these best cementing practices have been followed on a daily basis for all production and intermediate casing. Rotation practice has been widely applied to liners but not for casing strings.