Below motor pressure compensation system for submersible pump

Details Below motor pressure compensation system for submersible pump Below motor pressure compensation system for submersible pump

E - Fixed Constructions

21

B

166/27

E21B 43/01 (2006.01) F04B 47/06 (2006.01)

Patent

CA 1160150

ABSTRACT OF THE DISCLOSURE A submersible pump assembly has pressure compensator features to avoid negative pressure at the top of the tool during installation. The submersible pump assembly has an electric motor contained within a lubricant filled motor chamber below a pump. A pressure compensator chamber is located below the motor chamber and separated by a parti- tion. The pressure compensator chamber is also filled with lubricant. A passage bypasses the partition and leads to the motor chamber above the motor. A bellows is mounted in the pressure compensator chamber with its mouth facing upwardly. A port extends from the exter- ior of the pressure compensator chamber to the interior of the bellows for admitting well fluid. Also, the bel- lows may be filled with a heavy fluid during installation so as to retard contraction of the bellows if the tool is suddenly jerked to a stop. The bypass passage is not re- quired in this embodiment.

390662

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