Well Deployed Heat Fin For ESP Motor

Inactive Publication Date: 2012-07-26
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The present disclosure describes an electrical submersible pumping system (ESP) with an improved cooling system and a method of cooling an ESP. In an example embodiment, disclosed is a method of cooling an ESP that involves adding fins to an outer surface of the ESP. The fins are shielded from damage by covering or potting them with a protective layer(s) that is removed after the ESP is deployed within a wellbore. While the ESP is being lowered downhole and inadvertently contacts a wall of the wellbore, the protective layer(s) safeguards the fins from damage. In an example embodiment, the potting or shielding material disintegrates when disposed in a wellbore and the fins conduct heat from within the ESP to fluid in the wellbore. The material can be made from wax, aluminum, zinc, beryllium, magnesium, alloys thereof, and combinations thereof. Optionally, the covering can be a protective packing encapsulated with an outer layer. Where in this example, the protective packing can be particulate material, sand, plaster, wax, and combinations thereof and the outer layer can be aluminum, zinc, beryllium, magnesium, alloys thereof, or combinations thereof. In an example embodiment, the fins are disposed on a motor section of the ESP that contains a motor for driving a pump in the ESP. After deploying the ESP with the protecte

Problems solved by technology

The motor may become overheated without the cooling effect by the transfer of heat.
The prospect of overheating, even while heat is being transferred to fluid flowing adjacent the motor, limits the pumping ability of an ESP.

Method used

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  • Well Deployed Heat Fin For ESP Motor
  • Well Deployed Heat Fin For ESP Motor
  • Well Deployed Heat Fin For ESP Motor

Examples

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Embodiment Construction

[0013]The present invention will now be described more fully hereinafter with reference to the accompanying drawings in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the illustrated embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be through and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.

[0014]FIG. 1 illustrates an example embodiment of an electrical submersible pumping system (ESP) 10 disposed in a subterranean wellbore 12; the ESP is used for pumping fluid 14 from the wellbore 12. The fluid 14 resides as connate fluid within a formation 16 shown adjacent the wellbore 12; the fluid 14 enters the wellbore 12 through perforations 18 in a casing string 20 that lines the wellbore 12. The ESP 10 includes a motor section 22 on its lower end hav...

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Abstract

An electrical submersible pumping system (ESP) for use in pumping fluids from a wellbore. The ESP includes fins on an outer portion of the ESP that transfer heat from a motor in the ESP to fluid flowing past the fins. A self removing material is provided over the fins when the ESP is deployed into the wellbore to protect the fins against being damaged when the ESP contacts a wall of the wellbore. The material can corrode, erode, melt, dissolve, disintegrate, or otherwise automatically decouple from the fins when the ESP is disposed in the wellbore.

Description

BACKGROUND[0001]1. Field of Invention[0002]The present disclosure relates to electrical submersible pumping (ESP) systems submersible in well bore fluids. More specifically, the present disclosure concerns a method of protecting motor cooling fins during deployment of an ESP.[0003]2. Description of Prior Art[0004]Submersible pumping systems are often used in hydrocarbon producing wells for pumping fluids from within the well bore to the surface. These fluids are generally liquids and include produced liquid hydrocarbon as well as water. One type of system used in this application employs an electrical submersible pump (ESP). ESP's are typically disposed at the end of a length of production tubing and have an electrically powered motor. Often, electrical power may be supplied to the pump motor via an electrical cable. Typically, the pumping unit is disposed within the well bore above where perforations are made into a hydrocarbon producing zone. This placement thereby allows the prod...

Claims

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Application Information

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IPC IPC(8): F04B49/06F04B35/04
CPCF04B53/08F04B47/06
InventorSNYDER, KRISTOPHER C.TINGLER, KEVIN SCOTT
OwnerBAKER HUGHES INC