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.
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