Jinchao Xu

Study on Single Crank Flexible Pumping Unit in Oil Field Artificial Lift

International tension between energy supply and demand boost developments of energy-saving industry. Structure drawbacks of four linkage bar of the conventional beam pumping unit in oil field artificial lift led to the study of a single crank flexible pumping unit. Because of beam pumping unit issues, such as many energy transfer links, high energy consumption and investment, and so on, the single crank flexible pumping unit made the flexible delivery instead of rigid, substantially reduce the energy transfer links, to reduce the weight of the load rod as a breakthrough to achieve light and compact oil production ground equipment, while minimizing energy consumption, increased functionality, lower investment and overall cost. Field tests show that significant energy savings are found in the single crank flexible pumping unit, which is worth of promoting.

Application and Design of Plunger Pump Lifting Viscoelastic Fluid

Daqing Oilfield has more than 10,000 million kilograms of oil through tertiary recovery every year. However, eccentric wear of sucker rod and tubing severely impede the implementation effectiveness and large-scale utilization of tertiary oil production when injecting viscoelastic fluids containing polymer. Therefore, a plunger pump lifting viscoelastic fluid is designed based on the analysis of the mechanism of eccentric wear. The principle to reduce eccentric wear is increasing hydraulic and viscoelastic friction, and expanding clearance. Due to make use of the plunger pump lifting viscoelastic, laboratory experiment and field application have demonstrated effective reduction of eccentric wear, extend the life of the sucker rod and tubing, and improve pump efficiency.

Optimal Desigh of Self-Sealing Low Friction and Non-Leakage Plunger Pump

A new type of wear-resistant hydraulic feedback self-sealing plunger pump is proposed. finite element analysis and optimal design of orthogonal parameters are applied to determine the structural parameters. The pump overcomes the conventional piston friction, low efficiency, short life. Laboratory tests showed that the pump free down stroke, full returns, leakage reduction 1,000 times than the standard API. Field experiments indicate that pump efficiency attain to 60-80%, achieved a good energy saving effect of improving the pump efficiency.