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A motor and pump barrier fluids pressure regulation system in a subsea motor and pump module

A technology for regulating systems and motors, applied in the field of pressure systems, can solve problems such as increased response time

Inactive Publication Date: 2013-05-15
VETCO GRAY SCANDINAVIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As subsea hydrocarbon production sites are increasingly installed and operated at increasing depths and step-out distances, response times in lubrication and cooling systems increase accordingly

Method used

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  • A motor and pump barrier fluids pressure regulation system in a subsea motor and pump module
  • A motor and pump barrier fluids pressure regulation system in a subsea motor and pump module

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Embodiment Construction

[0037] In the following, reference will be made to the accompanying drawings ( figure 1 and figure 2 ) describe preferred embodiments of the present invention in more detail. In the figures, the subsea motor and pump module comprises a motor / pump assembly 1 to which motor barrier fluid and pump barrier fluid are supplied from an external source of hydraulic fluid.

[0038] Since the present invention is not limited to any particular type or model of motor / pump assembly, but is in fact also applicable to various motor / pumps familiar to the skilled person involved in the transfer of process fluids from subsea hydrocarbon production configuration, the interior of the motor / pump assembly 1 need not be discussed in detail. Typically, the motor / pump assembly includes a motor M enclosed in a pressurized watertight enclosure or motor housing 2 , and a pump rotor assembly P enclosed in a pump housing 3 . The motor driving the pump is usually an electric motor, but other drive units...

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Abstract

A motor and pump barrier fluids pressure regulation system for a subsea motor and pump module is disclosed. The system comprises a motor barrier fluid circuit hydraulically separating the motor from the pump, and a pump barrier fluid circuit hydraulically separating the internal structure of the pump from the pumped medium, wherein the fluid flow and pressure in each of barrier fluid circuits is managed via pressure controlled on / off valves (10, 22; 14, 26) arranged in each circuit, the on / off valves being individually controllable in response to detected difference in pressure between the medium, on a suction side or on a discharge side of the pump, and fluid in the motor and pump barrier fluid circuits.

Description

technical field [0001] The present invention generally relates to subsea equipment involved in the transport of process fluids generated in subsea hydrocarbon production. More specifically, the present invention relates to a system designed to manage the pressure of barrier and lubricating fluids in subsea motor and pump modules. Background technique [0002] Process fluids in subsea hydrocarbon production are typically multiphase fluids drawn from subterranean reservoirs, containing oil and gas and possibly solid matter. The motor / pump module is disposed subsea and configured to transport process fluid from the reservoir to a surface or land-based host facility. Motor / pump modules are often subject to significant pressure changes in the pumped medium as well as significant transient loads, eg during pump start and stop sequences. The medium pressure at the suction side of the pump can be of the order of hundreds of bar, requiring corresponding measures in the motor / pump m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/01B63C11/00E21B43/12F04B53/16F04D29/10F16J15/40
CPCF04C2/16F04C2270/185F04C2/00F04C11/008F04C13/008F04C14/28F04D13/086F04D13/10F04D13/062
Inventor O.塞勒
Owner VETCO GRAY SCANDINAVIA
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