Subscribe to our newsletter to receive the latest news and events from TWI:

Subscribe >
Skip to content

Geothermal Project Paper Published in Journal

Mon, 13 March, 2023

Research carried out by a number of TWI experts working on the H2020-funded Geo-Drill project has been published by the Journal of Thermal Spray Technology.

The paper, ‘Feasibility Study of High-Velocity Oxy-Fuel (HVOF) Sprayed Cermet and Alloy Coatings for Geothermal Applications,’ discusses the use of high-velocity oxygen fuel (HVOF) spraying for cermet and alloy coatings. The research, which included performance assessments in a simulated geothermal drilling environment, investigated factors including surface roughness, thickness, porosity, hardness, adhesion strength, and erosion–corrosion resistance.

Comparing the results to selected steels in use for geothermal drilling operations, the paper recommends HVOF coatings for use in geothermal applications.

Effective coating and drilling technologies can greatly reduce the costs associated with geothermal drilling operations, where the harsh environments reduce the lifetimes of the components used to access geothermal energy.

With Geothermal set to take a larger and more important role in the global renewable energy mix, Geo-Drill could help improve affordability, opening up new opportunities for this low carbon footprint, ‘always-on,’ renewable energy resource.

You can see how TWI has been working to help deliver affordable, reliable and sustainable energy solutions though our Geo-Drill project work by reading the paper, here.


The Geo-Drill project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 815319.

For more information please email: