acid stimulation with zonal isolation packers

Acid stimulation

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Compartmentalized isolation with annulus packers for selective acid stimulation

acid stimulation with zonal isolation packers

Challenge

Matrix acidizing requires precise flow and pressure control. Saltel Expandable Steel packers placed along the casing string to split the long length of the annulus into shorter sections will allow proper placement of the treatment.

Solution

Annular Zonal Isolation Packer (AZIP) simulates the combined effects of differential pressure and temperature cycles.
Selecting the adequate material and elastomer skin to meet the downhole conditions allows multiple acid treatments during the life of the well.

_Xpandable steel AZIP-C 0-0Xpandable steel AZIP-C 1-0Xpandable steel AZIP-C 1-1
MountingCrimpedCrimpedCrimped
Valve systemSafety closing valveLock valve closing permanently packer expansion port.
Annulus compensation valve (one side)
Lock valve closing permanently packer expansion port.
Dual Annulus compensation valve (both sides)
Sealing SystemDeformable corrosion-resistant alloy (CRA) sleeve with elastomer sealDeformable corrosion-resistant alloy (CRA) sleeve with elastomer sealDeformable corrosion-resistant alloy (CRA) sleeve with elastomer seal
ReliabilityLife of well (Sweet and Sour environment)Life of well (Sweet and Sour environment)Life of well (Sweet and Sour environment)
PerformanceDifferential pressure hold by steel sleeve mechanical resistance
Unaffected by temperature variations
Self energized High pressure differential from one direction
Unaffected by temperature variations
Self energized High pressure differential from two directions
Unaffected by temperature variations
Max DeltaP
Compensated
Up to 3,000 psi depending on diameter and sleeve thicknessUp to 3,000 psi depending on diameter and sleeve thicknessUp to 3,000 psi depending on diameter and sleeve thickness
Max DeltaP
Not Compensated
Up to 3,000 psi depending on diameter and sleeve thicknessUp to 3,000 psi depending on diameter and sleeve thicknessUp to 3,000 psi depending on diameter and sleeve thickness
Max Temp.302 degF - 150 degC302 degF - 150 degC302 degF - 150 degC
QualificationAPI 19 OH V1API 19 OH V1API 19 OH V1