Gas-lock re-prime shaft passage in submersible well pump and method of re-priming the pump
Number of patents in Portfolio can not be more than 2000
United States of America
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Mar 8, 2022
Grant Date -
May 21, 2020
app pub date -
Nov 8, 2019
filing date -
Nov 8, 2019
priority date (Note) -
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Abstract
A well fluid centrifugal pump has a shaft passage in the shaft. The shaft passage has an open upper end above the impellers and a closed lower end below the impellers. An outlet port extends laterally from the shaft passage. A gas-lock re-priming device in the shaft passage diverts a portion of well fluid in the discharge adapter bore through the shaft passage and out the outlet port. The re-priming device may be a pressure actuated valve that is biased to a closed position and opens when the pressure in the discharge adapter bore drops below a minimum. Alternately, the re-priming device may be an orifice member with an orifice passage that continuously diverts a portion of the well fluid in the discharge adapter bore out the outlet port.
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