UNDERWATER SYSTEM (VERSIONS) AND METHOD FOR MULTIPHASE MEDIA SEPARATION Russian patent published in 2017 - IPC B01D17/02 E21B43/36 

FIELD: oil and gas industry.

SUBSTANCE: underwater separation system for multiphase media containing oil, water and sand, contains an inlet manifold (204), a divider (206), separate pipelines (208, 210) of similar diameter. An adjustment chamber (214) having larger diameter than the separate pipelines (208, 210) of similar diameter is connected to the ends of the separate pipelines (208, 210). The adjusting chamber (214) includes discharge pipelines (216, 218) and is made to correct the fluid flow rate at the discharge pipeline. A sand receiver (212) is connected to the separate pipelines (208, 210), which is located below one of the separate pipelines (208, 210). Inside one of the separate pipelines (208, 210) there is a jet nozzle, connected to the lower outlet pipeline of the adjastment chamber (214). The underwater separation system also includes a control valve and a control system. The multiphase fluid is passed through separate pipelines (208, 210) downstream of the divider (206) and separated into oil and water phases. The solid particles are separated. The water flow through the outlet channel at the lower end of the adjustment chamber (214), and the oil flow through the outlet at the upper end of the adjustment chamber (214) are provided. Water is injected into the receiver (212). A cyclone is formed to remove sand inside the receiver (212) and remove the stirred-up solid particles from the receiver (212) without stopping or slowing down the steps of multiphase fluid flow and its separation.

EFFECT: invention allows to adjust flows in each line, reduce power consumption, increase the productivity of underwater well, and to create compact underwater separation system.

17 cl, 6 dwg