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Geothermal
Drilling

Deep borehole construction for ground source heat pump systems, district heating and renewable energy schemes. Proven deep capability — 160m and beyond — across the UK.

160m+ Depth
GSHP Systems
District Heating
Heating & Cooling
UK-Wide
160m+
Depth Achieved
GSHP + District
Applications
Heat + Cool
Year-Round
UK-Wide
Coverage
About This Service

Tapping Into the Earth's
Natural Energy

Geothermal drilling involves constructing deep boreholes into the ground to access the stable thermal energy stored in the earth. The ground below a depth of around 15 metres maintains a near-constant temperature year-round — typically between 10°C and 13°C in the UK — making it an efficient and reliable source of renewable heating and cooling energy.

GeoPrime Solutions construct geothermal boreholes for ground source heat pump (GSHP) systems, district heating networks and other renewable energy schemes. We have drilled to depths of 160m and beyond on geothermal projects, giving us proven capability for both shallow and deep borehole programmes.

Once drilled, a closed-loop ground heat exchanger is installed in the borehole — typically a U-tube or coaxial pipe — and the borehole is grouted to ensure good thermal contact with the surrounding ground. The ground loop is then connected to a heat pump, which extracts heat from the ground for space heating and hot water in winter, and can reject heat back into the ground for cooling in summer.

The number and depth of boreholes required depends on the building's heating and cooling load and the thermal properties of the ground. A thermal response test (TRT) can be carried out to accurately characterise the ground's thermal conductivity at your site, enabling accurate borehole field design.

Suitable For
  • Ground source heat pump systems
  • District heating networks
  • Commercial & industrial buildings
  • Residential developments
  • Public sector & healthcare
  • Education buildings
  • Thermal response testing (TRT)
  • Borehole thermal energy storage
GEO
The Process

How Geothermal Boreholes
are Constructed

01
Design & Planning
Borehole numbers and depths are determined based on the building's heating and cooling load and the thermal properties of the ground. A TRT may be carried out to accurately characterise ground thermal conductivity.
02
Rotary Drilling
Boreholes are drilled to the required depth using rotary methods. Geological logging is carried out as drilling progresses to record ground conditions encountered at depth.
03
Loop Installation
Ground loop heat exchanger pipework — typically a HDPE U-tube or coaxial pipe — is installed to the full depth of the borehole. The loop is pressure tested before grouting commences.
04
Grouting & Completion
The borehole is grouted from the bottom up using thermally enhanced grout to ensure good thermal contact between the loop and the surrounding ground. The surface is reinstated and the loop connected to the heat pump system.
Applications

Where Geothermal Drilling
is Used

Commercial
Office buildings, retail developments and mixed-use schemes seeking low-carbon heating and cooling with reduced long-term energy costs.
Residential
New build housing and apartment developments requiring low-carbon heating solutions to meet Part L building regulations and Future Homes Standard requirements.
Education
Schools, universities and further education buildings with significant year-round heating and cooling demands well suited to geothermal systems.
Healthcare
Hospitals, health centres and care facilities where reliable, low-carbon heating is essential and long-term energy cost reduction is a priority.
District Heating
Large-scale borehole fields supplying heat to district heating networks serving multiple buildings or entire urban developments.
Industrial
Industrial and logistics facilities with significant process heating or cooling requirements where geothermal offers a reliable, low-carbon alternative to fossil fuels.
GeoPrime Solutions

Heat from
the Ground Up.

Proven deep drilling capability for geothermal projects across the UK — 160m and beyond, delivered safely and on programme.

Why Choose Us

Why GeoPrime for Geothermal Drilling

Proven Deep Capability
We have drilled to 160m and beyond on geothermal projects. Deep drilling carries additional challenges that only experience can prepare you for — we've handled them before and we know how to manage them on site.
Renewable Energy Experience
We understand the geothermal drilling process from site investigation through to borehole completion and loop installation. We work alongside heat pump designers and M&E contractors to keep your project joined up.
UK-Wide Deployment
Geothermal drilling teams deployed anywhere in the UK. Competitive pricing regardless of location — one mobilisation cost covers your whole borehole field wherever it is.
Other Services

Related Services

Rotary Drilling
Cable Percussive Drilling
Coring
Window Sampling & Dynamic Probing
UXO Borehole Clearance
Soakaway Testing
Common Questions

Frequently Asked
Questions

Geothermal drilling constructs deep boreholes to access the stable thermal energy stored in the earth, used for ground source heat pump systems, district heating and other renewable energy schemes.
Typically between 80m and 200m depending on the building's load and ground thermal properties. GeoPrime Solutions have drilled to 160m and beyond on geothermal projects across the UK.
Yes. Ground source heat pump systems can provide both heating and cooling. In summer, heat is rejected into the ground rather than extracted from it, providing efficient cooling without a separate chiller.
The number depends on your building's heating and cooling load, borehole depth and the thermal conductivity of the ground. A thermal response test (TRT) accurately determines the ground's thermal properties to enable accurate borehole field design.
Yes — geothermal borehole systems are used across commercial, industrial, residential and public sector buildings. They are particularly effective for buildings with significant heating and cooling loads.
GEOTHERMAL

Planning a Geothermal
Borehole Project?

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07541 553837
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