single stage cementing

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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-WXpandable Steel ECP-C
MountingWeldedCrimped
Valve systemFluid trapping (check valve) + safety closingLock valve closing permanently packer expansion port and trapping fluid inside packer
Sealing SystemDeformable corrosion-resistant alloy (CRA) sleeve with elastomer sealDeformable corrosion-resistant alloy (CRA) sleeve with elastomer seal
ReliabilityShort term annulus sealLife of well valve system
PerformanceHigh DeltaP achieved with moderate setting pressuresHigh DeltaP achieved with moderate setting pressures
Max Delta Pressure
Compensated
Up to 5,000 psi, lower for bigger sizesUp to 5,000 psi, lower for bigger sizes
Max DeltaP
Not Compensated
Up to 5,000 psi, lower for bigger sizesUp to 5,000 psi, lower for bigger sizes
Max temperature rating
250 degF - 120 degC250 degF - 120 degC
QualificationAPI 19 OH V2API 19 OH V2