Category: Technology News

Successful abandonment in the Permian Basin

September 29th, 2021 by

After multiple failures with cement squeezes, learn how Chevron eliminated casing pressure and gas bubbles at surface using our bismuth-based alloy Performance Barrier Technology and by simply deploying our Wel-lok™ CRT on wireline. The well was successfully bubble tested, resulting in zero bubbles at surface, allowing the operator to complete the permanent well abandonment. The technique is now being used successfully on an additional two wells. Read the case study

Middle Eastern Expansion

September 22nd, 2021 by

We are delighted to announce the signing of an exclusive agreement with the Middle East’s leading energy service provider – AlMansoori Specialized Engineering – to further expand our deployment activity in this hugely important region.

A partnership that will leverage the vast experience and geographical reach of AlMansoori’s 4,000 employees and operations across 15 countries, to take our offering to the next level.

This agreement will complement our customer global base which includes Shell, bp, ExxonMobil, Aker BP ASA, Chevron and ConocoPhillips.

BiSN signs groundbreaking deal with ADNOC

September 21st, 2021 by

Wel-lok™ contract officially signed with ADNOC Group

We are proud to announce the signing of a contract with ADNOC Group which will result in the first ever deployment in the Middle East that utilises BiSN’s ground-breaking Wel-lok™ technology.

Scheduled to take place in Q4 of this year – this will mark an important deployment in the intervention sector for BiSN. Keep a look out for more updates as the project gets underway.

Decom North Sea 2021 Award

May 24th, 2021 by

We are honored to have received the Decom North Sea 2021 Award for Technical Innovation in Decommissioning.

The Wel-lok M2M technology has been deployed in over 200+ applications throughout the world. In our most recent campaign with Aker BP ASA in the North Sea, our tools were able to provide a rigless and time saving solution through a permanent and environmental barrier to over 30 wells.

Wel-lok technology utilized in the North Sea

May 12th, 2021 by

On the 12 May BiSN was proud to have our Wel-lok technology utilized in the North Sea with Aker BP ASA on their Valhall Field Center campaign. The results speak for themselves by reducing the time and equipment needed to effectively provide a permanent, environmental barrier and top seal for the over 30 wells.

Downhole Sealing Solution Found In Unique Bismuth Based Alloy

April 23rd, 2021 by

A technology using bismuth based alloys may help a festering problem with abandoned wells in Western Canada.

The federal government announced a $1.7 billion commitment toward the clean-up of abandoned and orphan wells in Alberta, Saskatchewan and B.C. last year. These wells are considered a concern because many are presently leaking methane due to ineffective abandonment programs.

A company named BiSN is creating gas-tight metal-to-metal seals using patented modified thermite heaters to melt bismuth-based alloys downhole.

“The best way to think about our tool is as a large candle,” said Paul Carragher, who founded BiSN in 2010 and is the company’s CEO, of the Wel-lok M2M technology, during a webinar posted on the company’s website.

“You’ve got the alloy on the outside, which is your wax and you’ve got your thermite heater on the inside which is your wick.”

“When that thermite heater burns it will burn top to bottom just like a candle does.”

With its new technology, the company is “fundamentally changing the way downhole sealing is carried out,” he said, breaking the mould of traditional
methods and “changing the way operators look at well abandonment.”

One of the functions of Wel-lok M2M technology, which is used in a range of tools and applications, is to provide a permanent seal in well abandonment.

“BiSN and our theoretically-tested 3,000-year bismuth alloy barrier provides the Canadian oil and gas industry with an economically competitive alternative to traditional plugs and remediation techniques,” says Steve Petten, BiSN Canadian general manager. “However, we believe the true value of our technology is in the safety and environmental benefits we offer our customers today and in the future.”

This qualified 3,000-year-barrier is expected to limit the need to re-enter wells in the future.

“We are taking bismuth alloy in a solid form downhole, melting and sealing off wellbore issues; whether those are surface vent flow, shutting off nonproductive perforations, sealing leaks in tubing and completions equipment, and this is all done with a wireline or slickline deployed tool,” he adds.

There are more than 90,000 inactive wells and more than 70,000 abandoned wells in Alberta, says the provincial government. Cement and bridge plugs are the conventional methods for abandonment operations.

“We think this will reduce the number of re-entries that industry will have to do here of cement jobs that have been pumped that appear to fix the wells and then five years later they have gas coming to surface again because the cement has deteriorated,” says Petten.

“This is a stronger material than cement,” he adds. “It’s basically giving a metal-to-metal barrier here.”

Bismuth expands 3.8 per cent as it solidi􀁷es, forcing possible trapped gas out of the annulus and stopping any further migration from the lower gas source.

Wel-lok M2M offers the benefit of gas-tight-barriers without needing to pump from the surface. The alloy’s high degree of density allows it to flow into the well with gravity alone.

“There’s an ease of business,” says Petten of the advantage to the technology, also singling out the advantage of running less heavy equipment down the road. “It’s one guy, one tool.”

This method also cuts down on the time required for the operation. Melting and solidifying the bismuth barrier takes minutes downhole and can be pressure-tested within an hour, Petten says. In comparison, concrete takes about 24 hours to cure.

Wel-lok M2M tools may be used in applications including the reduction of water production in existing wells, eliminating gas migration in cemented annuli, repairing a leaking production packer, sealing perforations in cased hole completions and reducing unwanted sand production, among others.

BiSN also has a product that runs its bismuth alloy on the outside of the casing when the user is drilling a well. The company deploys its thermite heater in the casing to melt the alloy, sealing any micro-annulus that may have formed during drilling and completion of the well.

Nearly 200 of its tools have been field deployed to date. Fourty-eight per cent of these deployments have been for plug and abandonment purposes. BiSN has manufacturing facilities in the United Kingdom and Houston, Texas.

Aker BP Test Video

April 22nd, 2021 by

Behind the scenes footage.

Join us as we look back to when the action started in testing and design for the largest tool ever built by BiSN for the Aker BP ASA Valhall well abandonment campaign.

The sheer size of the Wel-lok M2M STC™ is unprecedented!

#bisn #wellokm2mtechnology #environmentalsustainability

Record year for Field Deployments

January 6th, 2020 by

Over the course of 2019, BiSN continued to grow at a record pace. While continuing to work with many of our existing customers, we also worked with several new clients in 2019 and expanded to some new regions as well. In all, we had the pleasure of working with a dozen new clients in 2019 spread over 4 new geographical regions.

Well abandonment continued to be one of our key areas. The year started with the completion of a multi-well P&A campaign on a remote island in Australia, one that had begun in late 2018. An additional well abandonment was conducted to eliminate Bradenhead pressure in the DJ Basin. Q4 saw the startup of another multi-well P&A campaign in Australia, this one conducted from an offshore platform.

2019 saw its fair share of interventions as well with 5 total deployments of the Wel-lok M2M WSO™ (Water Shut Off) tool. The first 2 runs of the year took place from a LWIV (Light Well Intervention Vessel) in offshore Angola, followed by the first deployment of a WSO tool in the UK North Sea. The final 2 WSO deployments took place from a TLP, also in offshore Angola. In addition to the WSO tools, BiSN also experienced 3 firsts with 1 deployment. The first Wel-lok M2M Perf-lok™ was deployed in Bakersfield, California to isolate a perf tunnel in a steam injection well. Not only was this the first Perf-lok run and the first deployment in California, it was also the first field deployed tool to be milled out after setting.

Over the past few years, BiSN has run many abandonment and intervention tools, but not until 2019 had a completion tool utilizing the Wel-lok M2M technology been deployed. The Wel-lok M2M TDAP™ was first developed in conjunction with one of our partners several years ago but had not been commercially deployed. That changed in early Q2 2019 when an operator ran 10 of them as part of their casing program on a new drill pad. These were followed by 5 more deployments in December by another operator who has made the TDAP a part of his standard casing program going forward.

As you can see it was quite a year for all of us at BiSN. We could not have done this without the support of our customers and dedication to excellence from our amazing staff. But it is time to close the doors on 2019 and welcome in a new year. Thank you to all of you and here is to a safe and happy 2020.

If you would like to learn more about our Wel-lok M2M technology please contact us at or contact Jeff Fulks directly at +1 832 724 0621.


BiSN sees a significant increase in field deployments in Q1

May 28th, 2019 by

BiSN, the global leader in innovative metal-to-metal downhole sealing solutions, is celebrating a successful start to 2019, deploying more than three times as many tools against the same period last year.

Working with new clients, in new locations, BiSN has moved beyond the R&D phase of their Wel-lok M2M technology, deploying tools in Angola, Australia and the North Sea in the first quarter this year. With further deployments scheduled in the US, Africa, the North Sea and Australia in Q2, BiSN is looking forward to a record-breaking year.

These achievements follow an already successful year that saw the company working with new clients globally and deploying the world’s largest bismuth plug in the Norwegian North Sea, before testing an even larger tool in early 2019.

Paul Carragher, CEO said:

“2018 was an incredibly exciting year of growth for BiSN, with multiple award wins, new clients and record-breaking deployments for the company, but in the background, we were working hard to continue building on that success, setting ourselves up for a fantastic 2019.”

“So far this year, alongside developing and deploying innovative downhole application and tools, we’ve conducted more than 30 presentations to potential clients, taken part in global technical conferences and visited clients across 5 continents. We’ve seen a lot of interest in our technology, and we believe it is our commitment to developing the right solutions for our clients that is supporting our global growth.”

New Era for Well P&A as Largest Bismuth Plug Deployed

October 24th, 2018 by

BiSN, the global leader in metal-to-metal downhole sealing solutions, has achieved a world first in conjunction with AkerBP and Altus Intervention, through the successful deployment of the largest-ever bismuth plug.

Following over a year of development, BiSN’s award-winning Wel-lok M2M technology – which can be utilised during well and rigless well abandonment – was deployed via E-line in collaboration with Altus Intervention in AkerBP’s Valhall A-30 well in the Norwegian North Sea.

The Wel-lok M2M technology aims to bring substantial savings to operators by eliminating rig costs and doing the work rigless.

Conducted as a field trial, the tool was set to evaluate the effectiveness of bismuth as a permanent seal for P&A operations in lieu of cement. With 3,500 kg of bismuth alloy, a gas tight surface seal was created inside 18 5/8” casing through a section milled window cut in the 13 3/8” casing, entering previously unchartered territory regarding weight, size and precise setting procedures.

BiSN chief executive officer, Paul Carragher, said: “This project is an important step towards the adoption of bismuth well sealant technology. Wel-lok M2M drastically reduces the rig time needed to complete well abandonments (P&A) through the use of thermite heaters to melt bismuth-based alloys.

“We are fundamentally changing the way downhole sealing is carried out, and through trials like this, we continue to break the mould of traditional methods, changing the way operators look at well abandonment.”

Speaking about the project, Martin Straume, P&A Engineering Manager at AkerBP told us: “AkerBP is proud to be in front of the development of Bismuth as a barrier element with respect to Plug and Abandonment. In addition, this installation is proving that there is great savings potential in performing rigless P&A.”

Cathrine Bjaarstad, President Norway & Denmark, Altus Intervention said: “This project clearly demonstrates Altus Intervention’s ability to deliver innovative solutions and assist operators in resolving downhole challenges, adding value to their operations whilst creating both cost and time-savings”.