High-temperature wells — whether deep, geothermal-influenced, or under thermal recovery — are among the harshest environments an ESP can face. Heat attacks nearly every component, and a standard build simply will not last.
Why heat is so hard on ESPs
Elevated temperature degrades motor insulation, hardens and cracks elastomers, thins lubricating films, and accelerates corrosion. The margin for error narrows as temperature rises, and small design compromises become failure points.
Motor and insulation limits
The motor's insulation system has a defined temperature ceiling. In hot wells, motor sizing must account for reduced cooling and higher ambient temperature, and high-temperature insulation systems become necessary.
Elastomers and seals
Seals and elastomeric components are often the first to fail at temperature. Material selection — and validation at the actual downhole temperature, not a nominal rating — is essential.
Materials and coatings for thermal stability
Components and coatings must retain their properties at temperature. Thermally-stable coating systems protect against the corrosion and wear that heat accelerates, extending run life where standard finishes break down.
Designing for the well, not the catalogue
High-temperature service rewards engineering to the specific well: real temperatures, real fluids, real duty cycle. A component chosen for a cooler well will underperform when the heat is on.
Fiastar engineers components and coatings for high-temperature and other extreme wells. Share your well conditions and we'll respond within one business day.