The protector (seal section) is a vital component of the ESP system, positioned between the motor and the pump. It serves four primary functions:
- Torque Transmission: Transmitting torque from the motor shaft to the pump.
- Motor Protection: Preventing well fluid ingress into the motor.
- Pressure Equalization: Balancing internal motor pressure with the external wellbore pressure.
- Oil Compensation: Compensating for the thermal expansion and contraction of the dielectric oil.
- All protector types feature a monoblock design;
- All protectors are compatible with submersible electric motors (right-hand shaft rotation) from any manufacturer;
- The protector can be manufactured with an integrated intake module and suction screen;
- Any protector type can be produced in a corrosion-resistant version (K);
- Any protector type can be produced in a high-temperature version (T1). Such protectors are operable in well fluid temperatures up to 170°C (338°F);
- Protectors utilize mechanical seals from leading domestic and foreign manufacturers;
- Equipped with bypass check valves to bleed off excess internal pressure and remove free gas phases from the motor oil cavity during ESP operation;
- Protector shafts are made of high-strength stainless steel;
- The design includes a filter-cooler intended for filtering and cooling the oil in the thrust bearing area;
- Presence of a reinforced thrust bearing assembly to absorb the axial load from the pump.