8 | Aiming to redefine the geothermal landscape The HC-CTU is designed specifically to meet the rigorous demands of geothermal wells. Western Energy REGIONAL DEVELOPMENT T TKaren Phelps “Our unit maximises operational efficiency and ensures safer, faster operations.” Taupō-based geothermal services provider Western Energy is cementing its position in the energy sector as an innovator by recently unveiling new technologies that promise to redefine the geothermal landscape. “We are committed to bringing innovation to geothermal operations,” says Marcus Prestney, General Manager of Western Energy. “Our High-Capacity Coiled Tubing Unit (HCCTU) and formation cleaning service represent a significant step forward for the industry, offering capabilities that simply weren’t possible before.” The HC-CTU, developed in collaboration with NOV Canada at a $16 million investment, is designed specifically to meet the rigorous demands of geothermal wells. Compact, mobile and highly versatile, the unit provides an alternative to conventional rig-based drilling, enabling the creation of new wells with unprecedented efficiency and precision, says Marcus. “We drilled in December in Ohaki for the first time for a new reinjection well and it was classed as a world first. “The unit has also been used to make a very large well safe. We came up with a plan using this unit to plug it. This wouldn’t have been achievable with other units.” The HC-CTU boasts 100,000 lbs of constant pulling power, advanced pressure control systems and 2-⅞” coiled tubing strings capable of reaching depths of up to 2,850 metres. Its twin 1,200 HP Quint-plex pump delivers 16bpm pumping providing operators with precise control over fluid management. Marcus says these features allow Western Energy to undertake complex drilling, well lengthening and side-tracking operations with unmatched accuracy. “Our unit maximises operational efficiency and ensures safer, faster operations. It’s a true gamechanger for geothermal well interventions,” says Marcus.. “The HC-CTU has allowed the generating companies alternative options to use coil with smaller carbon footprint than conventional rig-based equipment, reducing down time and generating cost efficiencies.” Western Energy has also introduced a formation cleaning service. In collaboration with Contact Energy, it has developed a solution to reinvigorate wells where scale and blockages limit steam production. This involves pumping specialised inhibitors and chemicals into the formation using purpose-built skids, improving well flow and extending operational life. “Our formation cleaning service is now being rolled out to other customers, helping to maintain optimal well performance and reduce downtime.” Formation cleaning operations include scale identification, lab testing, custom pumping programmes and pre- and post-job monitoring with wireline and PTS surveys. Marcus says each operation is tailored to the unique conditions of the well, ensuring precise, safe and effective results. Western Energy’s commitment to innovation has been recognised nationally, with accolades such as the Excellence in Innovation award at the 2025 Unison Great Lake Taupō Business Awards. Its team of 40 specialists continues to push the boundaries of geothermal technology with a focus on safety, quality, sustainability and operational efficiency. The company is also a proud member of the Taupō Chamber of Commerce. “The geothermal industry is heating up, excuse the pun, with Minister Shane Jones having just released the Geothermal Strategy. “With this backed by the government there is interest in drilling super critical wells. Western Energy is positioning itself to assist with these works and support it with our new innovative technology.” COMPRESSED AIR SALES – SERVICE – HIRE Compressed Air & Nitrogen Specialists Proudly supporting Western Energy – Whangarei – Hamilton – New Plymouth – Palmerston North – Christchurch – Auckland – Tauranga – Hawkes Bay – Blenheim BRANCHES NATIONWIDE
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