Pumps – Motor driven – Pump within rotary working member
Patent
1998-08-25
2000-09-19
Yuen, Henry C.
Pumps
Motor driven
Pump within rotary working member
4174233, F04B 1700
Patent
active
061202614
ABSTRACT:
A combined electric motor and submersible pump apparatus intended for installation in line with the well tubing has a hollow drive shaft the down stream end of which is secured to the rotor of the motor and mounted for rotation in axial alignment with the axis of the tubing, the pump impellers being mounted on the upstream end of the hollow shaft, the shaft also having inlet and discharge ports and a check valve mounted on the interior of the drive shaft that is closed when the pump is activated. When the check valve is in the open position, a wire line tool or the like can be passed through the hollow drive shaft to a position below the apparatus.
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Gimie Mahmoud M
Saudi Arabian Oil Company
Yuen Henry C.
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