About our drilling services and team

UK property owners have used our drilling services to install geothermal and ground source heat pump boreholes for over 19 years. We’ve successfully drilled 1000s of boreholes in some of the most difficult locations. Our 11 drilling rigs and specialist equipment means we drill projects of all sizes. Our newest drilling rigs have lower emission engines, ideal to work in low emission zones.

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When it comes to drilling services, you want an experienced, reliable, and efficient team. Our dedicated team provides top-notch drilling services that meet your needs and exceed your expectations.

We provide a productive mix of knowledge and hands-on experience.

Because we’ve encountered all kinds of geologies and difficult ground conditions in the UK, the GSI team complete projects that many other drilling companies don’t have the knowledge to deal with.

Our drilling services include:

We follow the British Drilling Association’s (BDA) recommendations for water well drilling, which means our we drill all our water boreholes to an exceptional technical standard.

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We guarantee the amount of water your well provides

When you choose a drilling company for a water borehole you need to know you’ll get the amount of water you need. No problem! We guarantee your borehole’s flow and rate.

Ask about our 3 Year works’ guarantee*

We offer a 3 year works’ guarantee on our drilling services. Just ask us about it at the time of drilling.

New borehole drilling rig being delivered.

Our experience and expertise

When choosing a drilling service, it’s important to look for experience and expertise in the specific type of drilling you need. We’ve successfully completed 1000s of drilling projects over 19 years.

As a reputable drilling service we have a team of experienced professionals who can provide guidance and support throughout the drilling process. Don’t settle for a company that lacks the necessary experience and expertise to get the job done right.

Top customer service and support

Why choose a drilling service that lacks great customer service? We’re a team of professionals who are available to answer your questions and provide guidance throughout the drilling process. We work with you to ensure we meet your customer needs. Clear communication and transparency are key. Don’t settle for a company that doesn’t prioritise customer service and support.

Man calling about having a borehole drilled

Meet the team

Andrew Bollard / Founder

Never one to sit around, (so he says). Andrew began working in the oil and gas sector more than 35 years ago.

Working his way through the ranks to take on the role as operations manager of 3 platforms in the Caspian Sea for BP. His ability to foresee issues and solve problems quickly was invaluable. Andrew’s career has taken him all over the world. His experience legendary within the industry and so is his hands-on approach to each project.

Andrew retired from the oil industry to set up GSI Ltd, specialising in geothermal and water well drilling. Whether GSI drill 1 borehole in your back garden or 30 boreholes on a commercial site, he’ll be seen on site of each new project ensuring the first borehole is drilled smoothly and the customer is happy.

Neven Celebicanin / Director

Good men are hard to find, but not impossible it seems. As company director Nevin’s role finds him as Andrew’s right hand man.

His mechanical background is an invaluable asset in ensuring all our equipment and 11 rigs are maintained to the highest standard. Nev ensures all our projects run on time and to plan. Borehole drilling just doesn’t happen without Nev.

Sabina Bollard / Office manager / Director

It’s safe to say not much happens without Sabina’s involvement. As our office manager and company director Sabina is GSI’s backbone, dealing with the day-to-day accounting.

She studied at the Baku Oil Academy and became a qualified drilling engineer. Her vast experience working within the oil and gas sector means she also has an in-depth understanding of all kinds of drilling projects and what’s required to get the job done.

The GSI drilling team

What can we say about our team?

A great bunch of expert drillers who make every project happens like it should. A close knit borehole drilling team who work together seamlessly (We’ve trained all our drillers in-house).

Our highly skilled team of geothermal and water borehole drillers, alway maintain industry standards: Everyone on-site is a member of the Construction Skills Certification Scheme (CSCS) and trained to the National Plant Operators Registration scheme (NPORS) standard.

Each is also a trained first-aider. Many of our drillers have worked with us for several years. Working their way through the ranks and gaining invaluable skills that can only be achieved through hands-on, on-site experience.