Underwater vertical oil-gas multiphase pump for offshore production wells

Abstract

The invention discloses an underwater vertical oil-gas multiphase pump for offshore production wells, which is characterized in that: the multiphase pump comprises a vertically arranged multiphase fluid pretreatment device; the center in the multiphase fluid pretreatment device is vertically provided with a multiphase booster device; a power unit is connected to the upper part of the multiphase booster device; the periphery of the power unit is provided with a circulation cooling and lubricating device capable of exchanging heat with the power unit; one side of the power unit is provided witha measuring and control device; the multiphase booster device is powered by the power unit; and multiphase fluid enters a fluid inlet of the multiphase fluid pretreatment device, then changes a flow state, is boosted by the multiphase booster device, and is output through a fluid outlet of the multiphase fluid pretreatment device. Because the multiphase pump has an integrated structural design, the multiphase pump has better performance, compacter structure and more reasonable spacial layout, and has the characteristics of simple installation process, small occupied area, strong boosting capacity, adaption to severe production environment and the like.

Description

technical field [0001] The invention relates to a multiphase mixed transportation pump, in particular to an underwater vertical oil and gas multiphase mixed transportation pump used in offshore oil fields. Background technique [0002] In oilfields at home and abroad, the common method of oil and gas gathering and transportation is to separate oil and gas first, and then carry out single-phase transportation of liquid and gas respectively. This requires a complete set of oil and gas gathering and transportation system, including: separation equipment and independent gas and liquid pipelines. [0003] However, with the expansion of the field of oil and gas exploration and development, some oil fields with relatively poor mining conditions have been discovered one after another. Especially in the development and construction of ocean, desert and marginal oil fields, the construction investment and operation management costs of oil and gas gathering and transportation systems a...

AI Technical Summary

Problems solved by technology

[0007] (1) The installation process of the existing horizontal multi-phase mixed pump is complicated, and the horizontality of the pump body and the stability of operation need to be considered, which is not convenient for skid-mounting; there are many positions to be positioned, and it is difficult to locate on the seabed;

[0008] (2) The control system, motor, circulating cooling and lubricating device, buffer homomixer and mixed pump body of the existing horizontal multiphase mixed pump are all designed in a split structure (ie: pump body, homomixer , measurement and control devices and cooling devices are set independently, and then connected to each other through multiple pipelines and lines), therefore, it occupies a large area and is inconvenient to install, so it is not suitable for offshore oil fields, especially deep sea oil fields;

[0009] (3) The floor area of ​​the existing horizontal multiphase mixed pump will increase significantly with the increase of the number of stages, which will bring inconvenience to the overall skid-mounting, and also limit the increase of the mixed pump by increasing the number of stages. The implementation of this method of pressure effect;

[0010] (4) The control panel of the existing horizontal multiphase mixed pump is only suitable for manual operation by the staff, and there is no supporting ROV (underwater robot) operation panel;

[0011] (5) The external structure of the existing horizontal multi-phase mixed pump and its supporting auxiliary equipment has no sealing design, no waterproof function, and the internal sealing devices are not suitable for underwater operation

Images