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Wel-lok™ - Advanced Oil & Gas Well Technology

A permanent seal in minutes.

Ready to test within hours.

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Efficient. Simple. Sustainable.

Performance barrier technologies

Performance Barrier Technologies from BiSN utilize new sealing alloys — enabling precise placement of a high endurance gas-tight seal.

As the foundation of our multi-award-winning Wel-lok™ systems, the BiSN technology platform brings efficiency, simplicity and sustainability to our suite of tools, and comprises:

  • Engineered alloys that flow like water to fill downhole leak paths without pumping
  • Enclosed thermite element delivering controlled heat for precision melting and solidification in minutes
  • Range of conveyance options offering deployment flexibility without specialized surface equipment

How it works

Once located at the depth in the well where the sealing is required, a modified thermite powered chemical reaction heater is utilized to heat the alloy until it melts.

The chemical reaction heater can be run on any standard wire equipment without the need for any modifications. The power required to start the reaction is 240 volts and 60 millamps for approximately 15 seconds.

The molten alloy has a viscosity similar to water which allows it to flow and fill the void it is intended to seal.

It then sets as it cools producing seamless downhole sealing solutions for a variety of applications within 30 minutes. This unique sealing technology can be applied in the drilling, completions, interventions or abandonment stages of a well.

Tomorrow’s downhole solutions, today

Contact our business development team and talk to an expert on how BiSN technology can be used to solve your downhole issues today.

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Engineered Bismuth Based Alloys

Flows like water, V0 gas tight seals in minutes.

With a carefully cultivated mixture of alloys, we create a fast and precise sealing method that’s non-corrosive, better for the environment, and expands on solidification, creating a gas-tight seal.

  • Viscosity of Water​
  • Dense – SG-10​
  • Corrosion Resistant​
  • Expands like Ice

New alloys create the ultimate barrier: one that won’t shrink, develop channels or crumble away over time. A seamless material with the non-porous structure of solid metal that’s unaffected by temperature, pressure or aggressive fluids. And once it seals, it stays. Forever.

Science-backed Alloys

Our custom engineered, bismuth-based alloys have undergone rigorous testing and hundreds of successful real-world field deployments.

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Precision Chemical Reaction Heater

The heart of the heater – controlled thermite

BiSN’s thermite heaters blend precision with speed for well technology that seals in minutes and is ready to test within hours. By setting off a thermite chemical reaction on electric line, the unique bismuth-based alloy melts and flows into even the smallest of micro-annuli.

This proven method lets you achieve a permanent seal across all regions, terrains, and temperatures, all without the need for specialized surface equipment. No unnecessary expenditure. No halted production. No problems.

  • Downhole technology that’s proven in the field and powered by thermite
  • A non-explosive chemical reaction, deployed on any standard wireline
  • No handling permits or special licenses are needed

The pinnacle of well innovations and the power of raw thermite

Thermite is a mixture of metal powders (Aluminium and Iron Oxide). When Aluminium and heat meet the oxygen of the oxide, it yields incredible temperatures of heat. These brief but potent bursts of heat have the capacity to burn metals quicker than their usual oxidation rates.

We use this marvel of science to melt bismuth alloys and seal wells permanently. Thermite reactions require huge ignition temperatures and can be volatile when uncontrolled. By harnessing the power of a thermite reaction in a controlled scientific way, we can control the volume of heat through our damping and binding agents.

Thermite-Based Heating Solutions

Learn how BiSN has mastered thermite-based heating technologies and how they have been applied to real world, downhole issues.

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Intelligent Rigless Conveyance Methods

A major feature of BiSN technology is its ability to be deployed across a range of conveyance methods. BiSN chemical reaction heaters can be initiated rigless on wireline, slickline, or coiled tubing as well as on drill pipe via electric, pressure timer or ball drop activation.

Deployed off wireline truck - BiSN

Save Time and Money

BiSN tools can be deployed directly on a drill line without the need for a full rig which saves global operators time and money.

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Get in touch and find a
permanent solution for your well

Businesses worldwide are benefitting from BiSN's well services in the field. Contact us today and embrace tomorrow's downhole well solution, today.

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