wel-lok WSO
Seals unwanted water in oil & gas wells
Page last modified
November 26 2024
The wel-lokTM WSO (Water Shut Off) tool developed by BiSN provides a permanent downhole isolation solution to reduce unwanted water production from wells. It utilizes a thermite chemical reaction heater to melt a proprietary bismuth alloy that flows into the annular space and wellbore, sealing off water production.
The key features of the technology are:
- Bismuth alloy flows like water through screens and proppant without damaging the completion
- Provides isolation across the entire wellbore including annulus
- Single trip gravity deployment without pumps or squeeze
- Quick setting within hours, ready for immediate pressure testing
- Suitable for open and cased hole gravel packs, slotted liners, etc.
- Can seal in damaged or irregular wellbores
- Withstands high temperatures up to 160°C and pressures up to 11,650 psi
- Environmentally friendly with reduced intervention footprint
The wel-lok WSO allows operators to reduce water handling costs, increase oil production, extend well life, and lower environmental impact in a cost-effective single-trip intervention. Over 450 successful global deployments demonstrate the effectiveness and reliability.
Pros & Limitations
1
Reduced intervention costs
1
Reduced water handling costs
1
Extends the production life of the well
1
Increased oil production
1
Non-corrosive and not affected by H2S or CO2
1
Reduced environmental impact
Specification
| Title | Description |
|---|---|
| Theme/Discipline | Well OperationsWell Plug and AbandonmentProduction Technology |
| Core Tech | Chemical |
|
Completion Sizes
|
3.5", 2.5" OD, 4", 2.75" OD, 4.5", 3" OD, 5", 3.75" OD, 5.5", 4.25" OD
|
|
Max Sealing ID
|
6.375", 7", 8.5", 9", 10"
|
|
Conveyance
|
Slickline, Coiled Tubing, Drill Pipe
|
|
Temperature Range
|
0 - 175°C
|
|
Max Wellbore Deviation
|
0 - 86°
|
|
ADR Classification
|
Not classified as dangerous goods
|
|
Casing Grade
|
All grades
|
|
Max Pressure Rating
|
20,000 psi
|
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
BiSN is an oil and gas technology company founded in 2010 in the United Kingdom. The company develops engineered sealing solutions called "Performance Barrier Technologies" to help operators permanently seal wells and prevent leaks across the lifecycle of oil and gas wells, from drilling and completion through intervention and abandonment. BiSN's core technology is called wel-lok, which uses a thermite heating system to melt a proprietary bismuth alloy that seals leaks and cracks in wellbores. The company has grown to around 100 employees with facilities in North America, Europe, the Middle East, and Australia. BiSN's products have been used successfully in major oil and gas regions around the world. The company continues to innovate and expand its product portfolio to provide permanent sealing solutions for the challenges operators face at every stage of a well's lifecycle.
Country of Headquarters
United States
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