The screw pump oil production system is a highly efficient and energy-saving equipment, mainly composed of two parts: the surface drive unit and the downhole screw pump. The surface drive unit transmits the wellhead power to the downhole pump through the rotary motion of the sucker rod, driving the downhole screw pump to operate.
The downhole screw pump consists of a rotor and a stator. The rotor is the only moving part in the screw pump; it is made of high-strength steel through precision machining and surface chrome plating. The stator is made by molding high-elasticity synthetic rubber inside a steel pipe, and various types of rubber can be selected for different application scenarios
The main components of a downhole screw pump are the stator and the rotor. When the rotor fits into the stator, a series of isolated sealed cavities are formed. As the rotor rotates, these sealed cavities move axially from the suction end to the discharge end, where they disappear, while new sealed cavities are formed at the suction end. Consequently, the liquid contained within these cavities is pushed from the suction end to the discharge end along with the movement of the cavities. This continuous formation, movement, and disappearance of sealed cavities achieves the pumping action.
Screw pumps are available in various types, including conventional, slimhole, uniform-wall thickness, and all-metal models. They can adapt to various complex well conditions and are widely used in fields such as oil production and coalbed methane drainage.
The screw pump consists of only two parts: the stator and the rotor. It generally does not require complex valve components, so gas locking will not occur even in high gas-content well conditions. As a positive displacement pump, it is also capable of producing liquids with high viscosity and high sand content.
Depending on the well conditions, the rotor eccentricity and plating thickness can be adjusted, and different rubber compounds can be used for the stator. During pump matching, the pump efficiency can be tuned to meet the requirements of different well conditions.
In addition to working well in normal well conditions, it is also suitable for conditions with high viscosity, high sand content, high coal dust content, and high gas content.
The screw pump system requires low investment, and the cost of replacing the downhole screw pump is low. The overall system efficiency is high, reaching over 70% at its peak.
By modifying the rubber compound of conventional screw pumps, or by using slimhole, uniform-wall thickness, and all-metal screw pumps, they can be applied in fields such as oil wells, coalbed methane wells, and geothermal wells.%以上。
The downhole screw pump has few components and is directly connected to the tubing and sucker rods for lowering into the well. Its working condition can be judged by monitoring the current and the wellhead backpressure.
Featuring over ten rubber formulations, our products can flexibly match the vast majority of oil well conditions with strong adaptability. Backed by a dedicated rubber laboratory, we conduct targeted compatibility tests to ensure perfect adaptation to the well fluid.
Utilizing imported injection molding equipment and a constant-temperature production environment, we ensure stable processes and reliable product quality.
With solid manufacturing expertise and extensive hands-on field experience, we can efficiently meet the demands of various operating conditions, ensuring the stable progress of every project.
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