Oil-water interface control for submersible electric motor

Details Oil-water interface control for submersible electric motor Oil-water interface control for submersible electric motor

1975-11-24

1977-08-09

Freeh, William L.

Pumps

Motor driven

Electric or magnetic motor

92 83, 310 87, F04B 1700

Patent

active

040407730

ABSTRACT:
Submersible electric motors, i.e., those which operate in water or brine wells, are protected against the entry of the well liquid which may contain foreign matter by being submersed in a neutral liquid, such as refined oil. Apparatus is provided which includes a float to sense the interface between the oil inside the electric motor and the well fluid outside the motor, which float and a cooperating valve and an auxiliary oil pump provides a regulated flow of oil to maintain the interface of the oil and well fluid at a fixed location. The intrusion of motor damaging well fluid into the motor is prevented.

REFERENCES:
patent: 1027947 (1912-05-01), Wedge
patent: 2002914 (1935-05-01), Mendenhall et al.
patent: 2002916 (1935-05-01), Mendenhall et al.
patent: 2233672 (1941-03-01), Mason
patent: 2577559 (1951-12-01), Armstrong et al.
patent: 2781209 (1957-02-01), Jacobs

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