Online three-stage eddy flow dehydration device of submarine pipeline

Abstract

The invention provides an online three-stage eddy flow dehydration device of a submarine pipeline. The online three-stage eddy flow dehydration device is applied to efficient dehydration of a water-containing well flow of an underwater production system. The dehydration device organically combines with an underwater manifold and the submarine pipeline to achieve online installation and operation of the submarine pipeline, and crude oil and production sewage integrated treatment and efficient oil-gas-water separation are achieved through an underwater three-stage eddy flow dehydration system and the device. A primary dehydrator is of a columnar single-cylinder structure, primary axial high-speed eddy flow crude oil dehydration treatment is carried out under the centrifugal separation effect in an eddy cone field, a secondary dehydrator is of a tubular short-three-cylinder structure, quick treatment of secondary axial layered eddy flow sewage is carried out according to an eddy flow field, a tertiary dehydrator is of a squirrel-cage long-cylinder structure, deep treatment of tertiary squirrel-cage parallel connection eddy flow sewage is carried out according to an eddy flow field, a crude oil supercharger pressurizes oil subjected to all stages of dehydration treatment to reach a same high pressure value, and then the oil converges to the same outward transportation seawater pipe for centralized outward transportation.

Description

technical field [0001] The invention relates to a device for direct dehydration and external transportation of water-bearing wells in the field of ocean engineering, in particular to a three-stage cyclone high-efficiency dehydration device for underwater submarine pipelines. Background technique [0002] At present, the configuration of typical oil and gas gathering and transportation facilities in offshore oilfields at home and abroad is "high-pressure well flow→standpipe→platform manifold→three-phase separator→secondary heater→secondary separator→electrodeboosting pump→electrical deheating dehydrator→electric dehydrator→export pump→submarine pipeline”, in which, the whole oil and gas treatment technology mainly adopts conventional dehydration equipment and the treatment efficiency is low; in addition, high-pressure well flow is transported and After the dehydration and degassing of the treatment systems at all levels, the additional loss of electric energy and heat energy ...

AI Technical Summary

Problems solved by technology

The compact oil-water separator currently used on offshore platforms usually adopts the parallel technology of hydrocyclone and single cyclone tube to reduce the space occupied by the separation equipment on the platform deck, such as the dehydration equipment developed by FMC Technologies in the United States. The platform's compact dehydration technology research is still in the experimental research stage

In addition, research on oil-gas-water separation equipment for underwater production systems is still in its infancy and testing at home and abroad.

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