Well Cementing: Primary and Remedial Operations for Well Integrity
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Well Cementing: Primary and Remedial Operations
Primary Cementing
Primary cementing is the process of placing a cement sheath in the annulus between the casing and the formation. Its objectives include:
- Removing drilling fluid from the casing interior and borehole
- Placing a cement slurry in the annulus
- Filling the casing interior with a displacement fluid (e.g., drilling fluid, brine, water)
A bottom plug separates the cement slurry from the drilling fluid, while a top plug separates it from the displacement fluid. The bottom plug ruptures upon landing at the casing string's bottom, allowing the cement slurry to flow into the annulus.
Remedial Cementing
Remedial cementing occurs after primary cementing to inject cements into strategic well locations... Continue reading "Well Cementing: Primary and Remedial Operations for Well Integrity" »