Inclination pipe type underwater pre-dewatering degassing separation apparatus

Abstract

The present invention provides an inclination pipe type underwater pre-dewatering degassing separation apparatus, which is used for direct underwater pre-dewatering degassing of gas-containing well flow. According to the inclination pipe type underwater pre-dewatering degassing separation apparatus, the crude oil vertical online separation technology and the crude oil horizontal online separation technology are organically combined to achieve the efficient pre-separation and the rapid pre-dewatering degassing of oil, gas and water according to the inclination type arrangement and the tube structure; the diversion pipe adopts the narrow seam type round pipe and the collision type hemispherical plate to complete the initial gas-liquid separation, the corrugated plate group uses a group of corrugated plates stacked at equal intervals in a vertical direction to complete the secondary gas-liquid separation, and the associated gas in the oil well production liquid is completely separated out; the gas-liquid separation pipe performs the corrugated plate inclination pipe type oil-water pre-separation treatment to remove the most of the water phase in the oil well production liquid; the small liquid droplets in the associated gas are completely removed by the gas discharging balancing device according to the two-stage filtration gas of the capture liquid and the filtration liquid under the gas scrubbing action of the balance pipe; the water discharging pipe timely discharges the low oil content production water; and the sand rinsing pipe is used for periodically rinsing sand particles and other debris deposited on the bottom portion of the gas-liquid separation pipe.

Description

technical field [0001] The invention relates to a device for direct underwater pre-separation of gas-containing well flow in the field of marine engineering, in particular to a separation device for inclined tube type pre-dehydration and degassing in an underwater production system. Background technique [0002] At present, the typical oil and gas pretreatment supporting facilities in offshore oilfields at home and abroad are "subsea high-pressure oil well production → underwater riser → platform manifold → primary separator → secondary heater → secondary separator". The treatment technology mainly adopts conventional one-stage three-phase separator and two-stage thermochemical separator, and utilizes the natural sedimentation of water phase gravity in crude oil to separate oil from water. The whole pretreatment equipment is bulky and the process efficiency is low; in addition, water The whole process after the liquid production of high-pressure oil wells passes through the ...

AI Technical Summary

Problems solved by technology

Compared with the supporting facilities for conventional crude oil pretreatment, the pre-dehydration and degassing separation device adopts the structure of a columnar tubular separator to achieve efficient pre-separation of oil, gas and water; at the same time, the separation device adopts an inclined arrangement, and the crude oil is vertically and horizontally The organic combination of separation technology solves the shortcomings of conventional pre-separation equipment such as small oil-water interface coverage area and insufficient separation time

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