Bjørn Syvert Frengstad

The Norwegian University of Science and Technology (NTNU) invites applications for a PhD position in Hard Rock Geothermal Drilling and AI-Driven Drilling Optimization. Based in the Department of Geosciences, this opportunity is at the intersection of advanced drilling technology, geothermal energy, and artificial intelligence. The research environment is highly collaborative, involving the Well & Reservoir and Engineering Geology & Rock Mechanics groups, and offers access to international research networks and strong industry connections. The project focuses on developing next-generation drilling technologies and AI-driven optimization methods for geothermal wells in Norway’s challenging igneous and metamorphic rock formations. Key research areas include high-frequency hydraulic hammers, directional drilling, multilateral well concepts, thermodynamic aspects of deep drilling, and operational strategies to increase rate of penetration and reduce costs. The candidate will explore bit wear mechanisms, drilling fluid challenges, and real-time anomaly detection using machine learning and digital twin technologies. The integration of physical modeling and AI/ML approaches aims to improve drillability, optimize drilling parameters, and enable cost-effective geothermal well construction. Applicants must hold a relevant Master’s degree (Petroleum, Mechanical Engineering, Rock Mechanics, Geotechnical Engineering, or Geomechanics) equivalent to a five-year Norwegian course with 120 credits at master’s level. Strong academic performance (B or better on NTNU’s grading scale) and proficiency in English are required. Preferred qualifications include experience in geothermal drilling, drill bits, drilling fluids, hard rock drilling, machine learning, artificial intelligence, and Python programming. Personal qualities such as independence, motivation, initiative, and the ability to present and discuss research are valued. The position offers a gross annual salary of NOK 550,800, with a 3-year employment contract and a 2% statutory contribution to the State Pension Fund. Additional benefits include free Norwegian language training at basic level (A2), favorable pension terms, and access to employee benefits. The working environment is open, inclusive, and diverse, with career guidance and support throughout the PhD period. To apply, candidates must submit their application electronically via Jobbnorge.no by April 19, 2026. Required documents include transcripts and diplomas, CV, Master’s thesis or draft, project outline, motivation letter, publications, certificates, and contact information for three referees. If education was completed abroad, documentation of scope and quality is necessary. Applications are assessed based on information received by the deadline. Supervision will be provided by Associate Professor Behzad Elahifar, Professor Bjørn Syvert Frengstad, and Associate Professor Randi Kalskin Ramstad. For questions about the position, applicants may contact the supervisors via email. The research will contribute to Norway’s geothermal energy development, combining deep wells with seasonal heat storage solutions and advancing sustainable energy technologies. NTNU is committed to diversity, equality, and a creative, critical, and respectful academic environment. The university encourages applications from candidates of all backgrounds and aims to increase the proportion of women in scientific positions. The city of Trondheim offers a vibrant cultural scene, excellent welfare services, and opportunities for education and family life. For further information and to apply, visit the official Jobbnorge link provided.

The Department of Geosciences at the Norwegian University of Science and Technology (NTNU) invites applications for a PhD Candidate position in Hard Rock Geothermal Drilling and AI-Driven Drilling Optimization. NTNU is a leading technical-scientific university located in Trondheim, Norway, with a strong focus on professional education and research. The university offers a vibrant academic environment with 9,000 employees and 43,000 students, fostering knowledge for a better world. This PhD position is at the forefront of geothermal energy and drilling technology, with research conducted in collaboration between the Well & Reservoir and Engineering Geology & Rock Mechanics groups. The project addresses the unique challenges of drilling in Norway’s igneous and metamorphic rock formations, leveraging decades of Norwegian petroleum research to innovate in drilling systems, bit design, drilling fluids, and downhole thermodynamics. The research aims to improve drilling efficiency, reduce costs, and support the development of deep geothermal wells and seasonal thermal energy storage solutions such as GeoTermos. Key research topics include: Hard-Rock Drilling Technologies: High-frequency hydraulic hammers, directional drilling methods, multilateral drilling concepts, thermodynamic aspects of deep drilling, and operational factors to increase rate of penetration (ROP). Drilling Challenges in Crystalline Formations: Bit wear mechanisms, cutter degradation, drilling fluid challenges (lubrication, cooling, rheology, fluid-rock incompatibilities), and strategies to minimize non-productive time (NPT) through real-time detection and mitigation. Data-Driven Drilling Optimization: Development of AI/ML models for drillability prediction, real-time parameter optimization, anomaly detection, and integration of physical modeling, digital twins, and data-driven decision systems. Geothermal Solutions for Norway: Assessment of geothermal well concepts, integration with seasonal heat storage (GeoTermos), and short-term PCM-based storage. The successful candidate will conduct high-quality research, develop and apply numerical, analytical, and data-driven models, publish in peer-reviewed journals, present at conferences, and contribute to popular-science dissemination. Active participation in research groups, international activities, and career-promoting events is expected. Eligibility: Applicants must hold a relevant Master's degree in Petroleum or Mechanical Engineering, Rock Mechanics, Geotechnical Engineering, or Geomechanics. The degree must correspond to a five-year Norwegian course with 120 credits at master's level. Master's students may apply but must obtain and document the degree before starting. A strong academic background (grade B or better) is required. Good written and oral English skills are essential. Preferred qualifications include industrial or research experience, knowledge of geothermal drilling, drill bits, drilling fluids, hard rock drilling, machine learning, artificial intelligence, and Python skills. Personal qualities such as independence, structured work, initiative, motivation, and ability to present and discuss research are emphasized. Funding: The position offers a gross salary of NOK 550,800 per annum for a 3-year employment period, with a 2% statutory contribution to the State Pension Fund deducted. Additional benefits include free Norwegian language training at basic level (A2), favorable terms as a member of the Norwegian Public Service Pension Fund, and access to employee benefits. Application Process: Applications and all required attachments must be submitted electronically via Jobbnorge.no by the deadline. Required documents include transcripts and diplomas for Bachelor's and Master's degrees, CV, Master's thesis or draft, documentation of completed Master's degree, project outline, motivation letter, publications or certificates, and names/contact information of three referees. If educated abroad, documentation of scope and quality of education must be provided. If invited to interview, certified copies of certificates and diplomas are required. NTNU values diversity and aims to reflect the diversity in society, promoting equality and inclusion. The university offers a supportive environment for career development and encourages applications from candidates of all backgrounds. For questions about the position, contact Associate Professor Behzad Elahifar ([email protected]), Professor Bjørn Syvert Frengstad ([email protected]), or Associate Professor Randi Kalskin Ramstad ([email protected]). Application deadline: 19 April 2026.