Ensure the cement provides effective annulus barrier above low-pressure uncemented openhole completion.
Challenge
Cementing the casing effectively is crucial for well integrity. When producing through screens, it is essential to avoid any cement contamination of the producing zone.
Solution
An Xpandable steel ECP combined with a Stage Collar or DV Tool is run as part of the production string.
The packer is set inside the previous casing shoe or in an open hole. The cement is pumped through the stage collar and placed above the expanded packer, avoiding the risk of contaminating the reservoir. Once the cement port is closed, the casing integrity is restored allowing stimulation to be performed. The packer provides an additional barrier in the annulus, along with a good cement job.
| Xpandable Steel ECP-W | Xpandable Steel ECP-C | |
|---|---|---|
| Mounting | Welded | Crimped |
| Valve system | Fluid trapping (check valve) + safety closing | Lock valve closing permanently packer expansion port and trapping fluid inside packer |
| Sealing System | Deformable corrosion-resistant alloy (CRA) sleeve with elastomer seal | Deformable corrosion-resistant alloy (CRA) sleeve with elastomer seal |
| Reliability | Short term annulus seal | Life of well valve system |
| Performance | High DeltaP achieved with moderate setting pressures | High DeltaP achieved with moderate setting pressures |
| Max Delta Pressure Compensated | Up to 5,000 psi, lower for bigger sizes | Up to 5,000 psi, lower for bigger sizes |
| Max DeltaP Not Compensated | Up to 5,000 psi, lower for bigger sizes | Up to 5,000 psi, lower for bigger sizes |
| Max temperature rating | 250 degF - 120 degC | 250 degF - 120 degC |
| Qualification | API 19 OH V2 | API 19 OH V2 |