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SwellStack
Wireline Retrievable DHSV SwellStack
Page last modified
April 11 2024
Downhole safety valves become corroded or damaged due to wireline activity. Standard chevron stacks in insert valves are unable to effectively seal in this damage and result in a leak path for hydrocarbons to migrate up the control line.
SwellStack, a swellable sealing solution with multiple chevron seals, is installed in place of an existing chevron stack.
This patented technology regains well integrity, effectively providing a seal of 10,000psi in liquid and gas.
Pros & Limitations
1
Extends the life of existing DHSVs
1
Simple deployment on wireline
1
Maximum reliability for severely damaged and corroded seal bores
1
Maintains well integrity
1
Removes requirement for DHSV straddles and potential workovers
1
Easily retrieved on wireline
1
Cost-effective solution
1
Custom-designed to suit customer requirements
0
Hybrid swellable compound is currently not available
Specification
| Specification Title | Specification Description |
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Asset Life Extension
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Regains and maintains well integrity, as well as successfully restoring production.
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Cost
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Proven to be a simple solution with minimal cost to the operator. Significant cost reductions are seen compared to a work-over or a replacement of the damaged DHSV.
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Capabilities
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Tendeka design, manufacture and supply a range of patented SwellStacks in a large variety of sizes and different elastomeric compounds.
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Operating Conditions
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Designed, manufactured and rated specifically for each application and within a temperature range between 0-250°C.
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Patents
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Tendeka’s patented technology (patent No WO2006045794 A1).
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Sealing
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SwellStack, is a swellable sealing solution which is designed to seal in damage within the bore of a safety valve.
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Reviews
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Technology Readiness Level
The Technology Readiness Level (TRL) indicates the maturity level of novel technologies. Learn more about the TRL scale used by us.
[9/9]
Development
Technology demonstration
Mature / Proven
Relative Business Impact
Solution Deployed By
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