Artificial lift technique of multistage sliding vane pump used in thermal production well

For low efficiency and poor high-temperature resistant performance of the conventional artificial lift systems, a new sliding vane pump and the matched lift system were designed, and the pump property study, field test and economy analysis were conducted. The redesign of flow direction reduces the pump's radial size and the design of series connection makes higher pumping pressure possible with lower revolution speed. By building pump characteristics models and doing laboratory experiment, it is found that the pump has steady hydraulic and mechanical characteristics, good no-load and heavy-load characteristics, and high system and volume efficiencies. The artificial lift system, including oil tube, sucker rod, transmission cylinder and anchor, was designed in reference to the progressive cavity pump (PCP) artificial lift system. The pump was tested in five wells and compared with other common lift equipment in energy consumption, high-temperature resistant performance and investment. The new artificial lift technique features its high efficiency, high temperature resistance, low investment and good adaptability.