Toroidal inductor for a pressure sensor in a submersible pump

Details Toroidal inductor for a pressure sensor in a submersible pump Toroidal inductor for a pressure sensor in a submersible pump

1984-02-10

1985-01-08

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Responsive to pump lubricant, sealant, or coolant condition

417414, F04B 4902, F04B 4910, F04B 3504

Patent

active

044925239

ABSTRACT:
A pressure compensator for a submersible pump has features to prevent damage while lowering the pump into the well. The pressure compensator includes a bellows located below the pump. A retainer will mechanically retain the bellows in a position other than its maximum lubricant volume position while lowering the pump assembly into the well. Once the motor begins operation, the retainer will release the bellows for normal movement. The retainer inlcudes a linkage member that is connected to the top of the bellows and extends upwardly to the drive shaft. A latching device latches the linkage member to the drive shaft. A reverse threaded portion in the latching device unscrews the latching device from the linkage member once the motor begins to rotate. A pressure sensing assembly is coupled between the pressure compensator and the motor. A toroidal inductor in the sensing assembly provides a passage for the linkage member.

REFERENCES:
patent: 2002907 (1935-05-01), Sessions
patent: 2404783 (1946-07-01), Blom
patent: 2674194 (1954-04-01), Artunoff
patent: 2682229 (1954-06-01), Luenberger
patent: 3340500 (1967-09-01), Boyd
patent: 4057365 (1977-11-01), Colmer
patent: 4387372 (1983-06-01), Smith et al.
patent: 4425087 (1984-01-01), Gould

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