The advances in researches on oil/water separation membranes as a class of developing techniques of oily wastewater treatment are reviewed.

The 3D numerical simulation of oil/water separation flow field in a gravitational separator is carried out by using the standard κ-ε model and multiphase mixture model of Fluent software.

The principal structure and the operating principle were presented for oil/water separation of dynamic hydrocyclones, whose designing methods of structural performance and manufacturing engineering were described, which were made through a indoor test and a field trial.

In this paper,we discuss the development of gravity oil/water separation techniques systematically,include the reviewed situation of engineering application and the development.

Several methods of oil and water separation have been compared, the principle and scope of application of each method for oil and water separation being narrated respectively.

Numerical simulation of inner flow field in hydrocyclone for oil water separation;

Research development in the gravity oil water separation technology;

Further investigate the flow mechanism of the liquid-liquid hydrocyclone,and the oil and water phases flow field in hydrocyclone for oil water separation is simulated using LRR stress model.

Design of the downhole oil-water separation system for submersible electric pump wells and its ground monitoring model;

Numerical simulation of the inner flow field in the single-cone hydrocyclone for oil-water separation;

Analysis of down hole oil-water separation for injection-production technique in the same well to the adaptability of producers in polymer-flooding oil-fields;