Off bottom cementing above screens or perforated pipes

Scroll Indication »

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-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