Active temperature control of electric drivetrains for efficiency increase

Wahl, Alexander; Wellmann, Christoph; Monissen, Christian; Andert, Jakob

doi:10.1016/j.apenergy.2023.120887

Cited by 10 publications

(1 citation statement)

References 36 publications

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“…However, in high water content gas wells, due to the electric pump running current fluctuation and serious airlock, it is easy to occur low load, underload, or even no-load operation, for example, control parameters were not set reasonably and airlock phenomenon cannot be found promptly, which would lead to no liquid flow in the pump. There were no cooling conditions, thus making the motor temperature continue to rise, and the motor would burn if the temperature exceeds the maximum value [14] . For this reason, under the environment of a high gas-liquid ratio, with the different percentages of gas volume in the pump, it wound bring different degrees of impact to the electric pump system, such as the downhole medium in the volume of liquid volume accounted for a small proportion of the pump running stability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Gas-liquid Separation Experiment of Electric Pump Drainage and Gas Extraction Unit in High Gas-liquid Ratio Gas Wells

Zhang,

Jing,

et al. 2023

J. Phys.: Conf. Ser.

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Given the prominent problem of water in the Tarim basin of China with high formation temperature and large water production, a preferred scheme of electric pump drainage and gas extraction unit for gas fields with a high gas-liquid ratio is proposed by the mechanical principle and structural design method. Then, the corresponding electric pumps were developed, and the drainage and gas extraction scheme of a permanent magnet electric pump unit with gas-liquid separation in the way of an inverted deflector is designed. Through indoor experiments simulating the downhole gas-liquid ratio environment, the gas-liquid separation ability and adaptability of the design scheme under different good conditions are verified. The results obtained demonstrate that the cable connection process can meet the requirements of high-pressure resistance (≥25 MPa), and the gas-liquid separation effect is very good in vertical wells by adopting the inverted deflector scheme. The separation effect exceeded 90% under different working conditions (production from 30 to 150 m3/day and inhalation gas-liquid ratio from 50% to 95% and even higher) in the experiment with high gas content. The results will promote the gas recovery rate of high gas-liquid ratio gas fields and improve extraction efficiency.

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Section: Introductionmentioning

confidence: 99%