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Combined barrier and lubrication fluids pressure regulation system and unit for a subsea motor and pump module

A lubricating fluid and control system technology, applied in the direction of engine lubrication, pump components, mining fluid, etc.

Inactive Publication Date: 2013-05-08
VETCO GRAY SCANDINAVIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leakage of hydraulic fluid flow along the drive shaft cannot be avoided due to differential pressure

Method used

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  • Combined barrier and lubrication fluids pressure regulation system and unit for a subsea motor and pump module
  • Combined barrier and lubrication fluids pressure regulation system and unit for a subsea motor and pump module

Examples

Experimental program
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Embodiment Construction

[0040] exist figure 1 In the drawings, reference numeral 1 denotes a subsea motor and pump module comprising a motor enclosed in a watertight pressurized enclosure or motor housing 2 and a pump rotor assembly enclosed in a pump housing 3 . The motor driving the pump is typically an electric motor, but other drive units such as hydraulic motors or turbines may alternatively be employed.

[0041] The pump rotor is configured to displace the pumped medium (typically a multiphase production fluid from a reservoir below the seabed) entering the pump through the pump inlet 4 so that it is expelled through the pump outlet 5, as shown by arrow F like that. The pump rotor is drivingly connected to the motor, and the interior of the pump is hydraulically separated from the pressurized (typically oil-filled) motor housing by means of a sealing arrangement 6 which seals against the rotating shaft (identified by reference numeral 7) on the outside, the pump rotor is connected to the moto...

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PUM

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Abstract

A barrier and lubrication fluids pressure regulation system for a subsea motor and pump module is disclosed, comprising a lubrication fluid circuit in flow communication with a hydraulic fluid supply via a first pressure reducing regulator (15); and a barrier fluid circuit in flow communication with the hydraulic fluid supply via a second pressure reducing regulator (14). The first pressure reducing regulator (15) is configured to reduce the supply fluid pressure in response to the pumped medium pressure at the suction side (4) or at the discharge side (5) of the pump, and the second pressure reducing regulator (14) is configured to reduce the supply fluid pressure in response to the output pressure of the first pressure reducing regulator (15). A pressure regulation unit is likewise disclosed, and arranged for housing the components of the barrier and lubrication fluids pressure regulation system in a pressurized vessel.

Description

technical field [0001] The present invention generally relates to subsea equipment involved in transporting hydrocarbon production fluids from a production point at the seabed to a surface or land-based host facility. More specifically, the present invention relates to systems designed to manage barrier and lubricating fluid pressures in subsea motor and pump modules. In another aspect, the invention also relates to a pressure regulation unit for subsea motor and pump modules. Background technique [0002] Process fluids in subsea hydrocarbon production are typically multiphase fluids drawn from subterranean reservoirs, including oil and gas and eventually solid matter. A motor / pump module is disposed on the seabed and configured to transport process fluid from the reservoir to a surface or land-based host facility. Motor / pump modules are frequently subject to large pressure changes in the pumped medium and large transient loads during pump start and stop sequences. The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/01B63C11/00E21B43/12F04B53/16F16J15/40F16N17/00
CPCE21B33/035F04B49/08F04B47/06F04B53/18F16J15/406E21B43/01
Inventor O.P.汤姆特
Owner VETCO GRAY SCANDINAVIA
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