Design and Efficiency Analysis of Small Displacement Pump

Abstract

To address the common issues of low-production oil wells like unbalanced supply and output, low pump efficiency and system efficiency and high energy consumption, a small-displacement oil pump has been developed. The pump has an enhanced structural strength with solid plunger and the mobility of the pumping oil with offset outlet valve. The outlet valve is located at the highest point of pump chamber when the plunger is at the bottom dead center, which is preferable for the discharge of gas and high gas-liquid and pump efficiency improvement. Combined with the distribution law of oil and gas in vertical pipe flow, it is assumed that the dissolved gas is linearly distributed from the oil inlet valve to the bottom end of the plunger after the pump is introduced. According to the position of the oil pumping valve of the oil pump, the efficiency calculation formula is derived. Then through reasonable matching of working conditions, the influence of various factors on pump efficiency is analyzed. The pump’s pump efficiency is about 10% higher than the API minimum pump diameter (32 mm), which is important for energy saving in oil fields.

Modeling, Kinematic Characteristics Analysis and Experimental Testing of an Elliptical Rotor Scraper Pump

“…Cheng et al analyzed the influence of various factors on pump efficiency, in view of the low efficiency of traditional oil pumps, and then developed a small-displacement oil pump. Their experiment proved that their oil pump offers good energy-saving ability and efficiency [22]. In order to improve the volumetric efficiency of the axial piston pump, Zhang et al proposed a novel stacked-roller 2D piston pump [23].…”