Protector for electrical submersible pumps

Pumps – Motor driven – Electric or magnetic motor

Reexamination Certificate

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C417S423300, C310S087000

Reexamination Certificate

active

06981853

ABSTRACT:
A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.

REFERENCES:
patent: 3384769 (1968-05-01), Schaefer et al.
patent: 6602059 (2003-08-01), Howell et al.
patent: 6688860 (2004-02-01), Du et al.

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