Geothermal well completion and intervention

High-temperature wells

Welltec® provides tailored solutions for geothermal well completions operating across a wide thermal range, from low-temperature direct-use systems to high-temperature resources. 

When demands are extreme, Welltec® offers the only solutions on the market capable of withstanding temperatures above 330°C and delivering 1,000,000 lbs of anchoring capacity – combining the Welltec® Magma Packer (WMP) and the Welltec® Expandable Anchor (WEA). 

This combination ensures long-term annular integrity in the most demanding environments, and is engineered for exceptional load-bearing capacity and thermal resilience.

Furthermore, our broad portfolio of completion solutions – including the Welltec® Annular Barrier (WAB®), and the Welltec® Light Packer (WLP) – has applications in zonal isolation, flow control, cement assurance, and reservoir compartmentalization, across the operating temperature range of geothermal wells. 

Welltec® Flow Valves (WFV™) complete a flow control system for large bores with no internal restrictions, providing effective injection/production control in geothermal wells. 

Through a range of proven metal expandable packer solutions, Welltec delivers fullbore completions capable of withstanding acidic corrosion and extreme pressure/temperature swings/cycling associated with the geothermal environment. 

Whether mitigating formation risk, extending well life, or revitalizing damaged assets, Welltec® enables smarter geothermal completion designs that reduce complexity, boost integrity, and support long-term, lower-emission energy production.

Low-temperature wells

Our broad portfolio of intervention solutions supports efficient scale removal and cleanout in mid- to low-temperature wells (up to 150°C), as well as quenched high-temperature wells – all with minimal environmental impact through e-line deployment. With over 30 years of experience in scale removal from oil and gas wells, Welltec® brings proven expertise to geothermal operations, restoring flow and optimizing production. 

Silica and calcite buildup is a common challenge in geothermal wells, driven by reservoir variability and thermodynamic shifts over time. E-line conveyed technologies like the Well Miller® offer a rigless, low-footprint alternative using a truck-mounted winch and crane – making them ideal for interventions in areas where space is at a premium.

Applications

High-temperature power generation

• Well construction and zonal isolation for high-enthalpy systems
• Relining and life extension of aging assets
• Relining of high-temperature wells
• Stimulation and isolation for Enhanced Geothermal Systems (EGS)
• High-temperature cementing operations
• Zonal isolation for stimulation
• Injection and production wells up to 330°C

Low-temperature direct use

• Construction of district heating wells
• Scale removal using Well Miller® range
• Bult-up areas/Urban interventions with reduced surface impact
• District heating, spas, agriculture, industrial processes

Benefits

• Proven all-metal expandable packer technology for extreme temperatures
• Long-term sealing performance under extreme geothermal conditions
• Resistance to acidic fluids and pressure/temperature cycling
• Reduced need for rework or intervention over life-of-well
• Prolonged asset life via improved well integrity
• Minimized CAPEX and system complexity
• Clean, carbon-free energy supply with low maintenance needs
• Reliable, scalable solutions for both high-intensity and direct-use systems
• Globally adaptable – supporting geothermal utilization in over 90 countries
• Optimized well design for uncertain or fractured formations
• Compact and mobile surface setups suitable for space-constrained environments
• Fast, efficient deployment with reduced operational disruption and lower GHG emissions through Welltec Intervention Services (WIS) and minimized lifecycle emissions through Welltec Completion Solutions (WCS).