Surface Drive Screw Pump Oil Production System
The surface drive device controls the motor via the control system and transmits the power to the rotor via the drive card, polished rod and sucker rod. The interference fit between the stator and the rotor will produce a continuous cavity and media transfer can be achieved via the rotational motion of the rotor. As the rotor rotates, sealed cavities will be continuously formed between the rotor at the suction side and the internal surface of the stator rubber bushing, be pushed towards the discharge side and vanish at the discharge side. The oil will be sucked under the pressure difference at the suction side and be squeezed from the suction side to the discharge side. The pressure is continuously rising and the flow rate is extremely uniform.
1.Compared with electric submersible pumps, hydraulic plunger pumps and pumping units, screw pumps have a simple structure and low one-time investment.
2.The ground device has a simple structure and is easy to install, and can be directly connected with the wellhead casing four-way, and covers small area.
3.High pump efficiency, low energy consumption and low management costs. Pump volumetric efficiency up to 90%, it is one of the lowest energy consumption and high efficiency of existing mechanical oil production equipment.
4.Wide range of viscosity, lift heavy oil.
5.Adapt to high sand content wells and high gas content wells.
6.Allowing a higher back pressure at the wellhead, and controlling the back pressure of the wellhead to be within 1.5 MPa or higher, which is beneficial to gathering and transporting in remote wells.