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ESP Motor Oil Management Enhancement

IP.com Disclosure Number: IPCOM000246477D
Publication Date: 2016-Jun-09
Document File: 2 page(s) / 352K

Publishing Venue

The IP.com Prior Art Database

Abstract

One of the reasons of electrical submersible pump (ESP) system failure is a malfunction of its motor. Motor breakdown may take place due to a number of reasons including overheating and motor oil performance degradation. This invention proposes three different methods to increase motor life by changing ESP motor oil management.

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ESP Motor Oil Management Enhancement

One of the reasons of electrical submersible pump (ESP) system failure is a malfunction of its motor. Motor breakdown may take place due to a number of reasons including overheating and motor oil performance degradation.  This invention proposes three different methods to increase motor life by changing ESP motor oil management. 

a) Current ESP system layout is shown. Item (1) is shown is representing an ESP system pump

b) Two new lines are added to the motor housing. (1 and 2) Oil in the ESP motor section will circulate using surface equipment. This layout improves heat management of the motor by taking hot oil away from the motor and replacing it with cooler oil from the surface.

c) Additional control line is attached to the motor housing (3). Pressure valve mounted at the lower point of the motor housing (4). Used oil can be flushed down from the motor through the valve by pressurizing the control line from the surface and opening the injector valve.

d) This layout allows having the oil circulation through the motor without the control lines communicating to the surface equipment. An additional oil reservoir with cooling and filtering

features (5) is attached above the ESP and connected to the ESP motor with two control lines (6 and 7).