MEMBER NEWS: Coretrax DAV MX delivers effective cooling solution for US geothermal project

March 6, 2023
MEMBER NEWS: Coretrax DAV MX delivers effective cooling solution for US geothermal project

Coretrax, a global leader in well integrity and production optimisation, has successfully delivered its DAV MX circulation sub to effectively cool an estimated 400oC geothermal well bottom hole temperature by almost 200 oC in the US.

A US operator was planning to drill a closed-loop geothermal land well with an estimated bottom hole static temperature of 400oC. Operating in such extreme heat could lead to risk of equipment failure, so it required an efficient and reliable method to ‘stage’ in the hole to cool down the temperature sensitive measurement while drilling (MWD) technology and other directional tools.

Staging is a common practice for high temperature wellbores to prevent MWD failures which normally involves pumping conventionally though the drill bit to cool the BHA. However, as this method can result in the motor rotating the drill bit, and causing possible damage in the cased and upper granite section as well as damage to the drill bit teeth, a more reliable method was required.

The application of the DAV MX delivered significant time savings while maintaining well integrity and improving safety. Estimated bottom hole temperatures were reduced from an estimated 400oC to 210oC whilst drilling using the circulation sub.

Coretrax’s DAV MX downhole circulation tool can be used across a wide range of applications including hole cleaning, displacements, lost circulation material spotting, blowout preventer jetting and many others. The rapid, smart dart’s activation speed, versatility and robustness gives the operator fast circulating options in nearly any circumstance.

The tool was deployed with the Split Flow Dart which allowed a limited flow through the motor and drill bit, reducing the rotations per minute whilst delivering high flow rate to effectively cool the BHA and borehole.

John Fraser, chief executive officer at Coretrax said: “The geothermal market has experienced significant growth in recent years in response to global environmental objectives and Coretrax already has a tangible track record in supporting these developments globally. Our range of downhole circulation tools are ideally placed to support the high temperatures and complexities of geothermal wells.

“This latest project is a strong example of how technology which has traditionally been applied to oil and gas operations can support this expanding sector to address the most complex well challenges while delivering enhanced reliability and greater efficiencies.”

Get in touch

AREG is the original energy transition organisation, working on behalf of members to empower the energy supply chain and champion its expertise. Please get in touch if you have any questions or would like to find out more about membership.

AREG has played an important role in the growth of Scotland’s renewable energy sector, engaging the supply chain and developing the European Offshore Wind Deployment Centre. However, we are only at the very beginning of the transition that AREG was established to both lead and support so there are still opportunities for companies to get into the constantly evolving renewables supply chain. We look forward to continuing our work together as renewables builds on its place as Scotland’s main source of power, and as we seek to deliver real change in the crucial areas of heat and transport.

Scottish Renewables

Aberdeen & Grampian Chamber of Commerce has worked closely with AREG since its formation. The recent progress in the developments of offshore wind projects by Equinor and Vattenfall are as a result of the work of the group over many years. The north-east is known as the oil and gas capital of Europe. At the Chamber, we believe the region must evolve its position to being recognised as the energy capital. Whilst hydrocarbons will continue to be essential in driving our economy for years to come, the generation of renewable resources will play an increasingly important role in providing cost-effective power, innovative development and economic growth.

Aberdeen & Grampian Chamber of Commerce

The enthusiasm and dedication of the early group that would become AREG was fundamental in us choosing to launch All-Energy in Aberdeen. The first tiny show was held in 2001, and AREG’s Chairman at the time, Jeremy Cresswell, played such an active role that I often describe him in terms such as All-Energy’s ‘midwife’. All-Energy is now the UK’s largest renewable and low carbon energy exhibition and conference in terms of number of attendees, space booked, and number of exhibiting companies. As AREG became firmly established, their presence and support for the event grew spectacularly over the years. We thank them most sincerely for their invaluable input.


Vattenfall has forged a strong working relationship with AREG through the development of the European Offshore Wind Deployment Centre. AREG has worked tirelessly on behalf of the North East and it can take enormous credit for the growth of sustainable energy in the region and the path it has cleared for the region to capture further investment.


Aberdeen City and Shire is emerging as a key location for renewables by successfully transferring its world-class oil and gas expertise into the sector and AREG has done much to advance this through a broad range of initiatives. It has acted as a catalyst in driving further investment in the local economy by engaging with companies, Government, public bodies and existing projects and we have been pleased to support their efforts. Scottish Enterprise will continue to engage with AREG as we increase Scotland’s use of renewable energy.

Scottish Enterprise