Tech Paper Enhancing Production from High-Enthalpy Geothermal Wells with New Electric Submersible Pump Technology
Advancements in ESP technology and results of a successful field trial in Turkey.
Reda Thermal
Power-efficient geothermal electric submersible pump
Overview
Reliable, high-flow-rate pumps for high-enthalpy geothermal systems
Reda Thermal™ power-efficient geothermal electric submersible pumps reliably lift fluids in high-enthalpy geothermal wells, delivering high flow rates with maximum electrical efficiency, minimal maintenance, and long run life. The combination of reliability and efficiency enables profitable production from geothermal wells that were previously uneconomical to produce—with minimal parasitic power load. This makes Reda Thermal pumps an ideal replacement for line-shaft pumps that are limited by depth and well profile, require maintenance, and are time consuming to install.
Reda Thermal ESP has earned the "Solar Impulse Efficient Solution" label after a rigorous evaluation process. This label validates the economic profitability of products and processes that protect the environment and help decision-makers find efficient solutions to meet their environmental commitments. Learn more about the evaluation process.
Applications
- High-enthalpy reservoirs with depleted pressures
- Deep setting depths
- Deviated wells
- Enhanced geothermal systems (EGS)
Benefits
Reda Thermal power-efficient geothermal electric submersible pumps reliably lift fluids in high-enthalpy geothermal wells, delivering high flow rates with maximum electrical efficiency, minimal maintenance, and long run life. The combination of reliability and efficiency enables profitable production from geothermal wells that were previously uneconomical to produce—with minimal parasitic power load.
Using energy-efficient permanent magnet motor (PMM) technology and motor sections with high power density, Reda Thermal pumps perform reliably in geothermal wells at bottomhole temperatures up to 440 degF [225 degC] and setting depths in excess of 5,000 ft [1,500 mt]. The modular assembly accelerates installation, reducing rig time from several days (15–20 days for a typical line-shaft pump (LSP) installation) to 2–5 days. There is no contamination by lube oil (required for LSP operation) of reservoir or process fluid due to self-contained lubrication.
Optional downhole monitoring sensors enable monitoring of pump and reservoir operating parameters and optimization of pump performance to extend run life.
Features
Tech Specs
| Reda Thermal Pump Specifications | |
| Series | 562 |
| Max. bottomhole temperature, degF [degC] | 440 [225] |
| Max. motor internal temperature, degF [degC] | 572 [300] |
| Pump OD, in | 6.75–11.25 |
| Max. flow rate at 60 Hz, m3/h [galUS/min] | 960 [4,225] |
| Max. power at 60 Hz, hp [MW] | 850 [0.63] |
| Volumetric compensator | Metal bellows |
| Motor oil | Motor fluid with optimized characteristics for the application |
| Power cable material | High-temperature ethylene propylene diene terpolymer (EPDM) |
| Power cable rating, degF [degC] | 500 [260] |
| Metal composition | Carbon steel, Ni-Resist®, INCONEL®, or special alloy and coating options |
| Downhole gauge | Optional |
All specifications are subject to change without notice.
| Pressure and Temperature Gauge Specifications | |||
| Rating | Accuracy | Resolution | |
| Annulus pressure, psi [kPa] | 5,000 [34,400] | ±4 [±27.57] | 0.2 [1.38] |
| Annulus temperature, degF [degC] | 500 [260] | ±5.4 [±3] | 1.8 [1] |
| Motor temperature, degF [degC] | 752 [400] | ±5.4 [±3] | 1.8 [1] |
All specifications are subject to change without notice.
Reda Thermal is a mark of SLB.
Ni-Resist and INCONEL are marks of their respective owners.
Additional information
Reda Thermal pumps are the product of more than 100 years of ESP development and deployment, including decades in steam-assisted gravity drainage (SAGD) projects, where lower-flow-rate ESP systems operate with run life exceeding six years in harsh oil environments up to 480 degF [250 degC]. The most recent advances include novel materials and elastomers to survive geothermal fluid composition and temperatures.
Case Studies