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Keywords: hydraulic motors
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. September 2008, 130(3): 033103.
Published Online: August 11, 2008
..., then the variable pump-motor 11 functions as a hydraulic motor to rotate the roller 16, which lifts the tubing string from the well with the help of the pulley block 17 and the hook 18. Adjusting the throttle valve 12 can adjust the lifting velocity of the tubing string. While removing and positioning...