Seal in the annulus and isolate troublesome loss zone section
Single-stage cementing operation
A single-stage cementing operation can be requested to start cementing only above the loss zone, in case it is located at the bottom of the well.
When conducting a drilling campaign operators might encounter frequent loss zones during the drilling. They might need to perform a single-stage cementing job, to bypass the loss zone. The stage cementing kit comes up with an Xpandable steel External Casing Packer (Xpandable ECP) and a stage collar above. The Xpandable steel packer must withstand the rigors of deviated wells and holes with under gauges when set in cased or open holes. The possibility to rotate and put weight on the packer during RIH is therefore essential.
Solution
The cement packer will be thus positioned and expanded in the openhole section for a one-stage cement job, once the annulus is sealed below.
The Saltel Xpandable ECP is a proprietary expandable steel packer specifically for single-stage cementing. The Xpandable external casing packer is a robust, simple, and cost-effective barrier providing reliable ground for stage cementing operations.
- Simple setting process compatible with the operator’s current string design and procedures
- Quick installation time
- Suitable for tight spots or doglegs
- Rotation is possible while RIH
- High sealing capability in a cased hole or openhole
| 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 |
