Under-well double-vortex type rotational flow oil and water separator

Abstract

The embodiment of the invention relates to an under-well double-vortex type rotational flow oil and water separator. The separator is an under-well rotational flow oil and water separation plant usinga high-speed rotational flow principle, and compared with a traditional hydrocyclone, the separator comprehensively uses double same-direction rotational flows for pre-separating oil and water and double opposite-direction rotational flows for conducting under-well refining oil-contained waste water treatment. In the pre-separation process of the oil and the water, two phases of the oil and the water move in the same axial direction in a rotational flow field, so that the two phases of the oil and the water are barely mixed compared with those conducting rotational flow motion in the oppositeaxial directions, a separation effect is better, and accuracy is higher; and in the oil-contained waste water treatment process, a long and thin cone is used for increasing the rotational flow intensity, so that the oil content of the separated water phase is lower. Compared with a traditional gravity sedimentation plant, the separator is better in treatment effect and smaller in occupied space and is a physical separation plant with application prospects.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of oil-water separation equipment, in particular to an downhole double-scroll cyclone oil-water separator. Background technique [0002] In petrochemical, environmental protection and other fields, oil-water separation equipment is an important production equipment, and separation technology is crucial to the development of the industry. Especially as the oilfield development enters the middle and later stages, the water cut rises sharply and even reaches above 95%. Lifting a large amount of water to the ground and then separating it to meet the standard discharge or reinjection involves a series of costs, making the oilfield close to the limit of economic production , how to reduce the cost of extraction is very important for the oil field. At the bottom of the well, the radial available space is very narrow, usually no more than 250mm, and the radial space left for the separator is e...

AI Technical Summary

Problems solved by technology

[0005] For example, CN201420199799.7, which applies the traditional hydrocyclone for treating oily sewage to the downhole, and uses multiple hydrocyclones in parallel, so that the oil well production liquid will flow through a series of elbows before entering the hydrocyclone to cause the flow direction The rapid conversion of the flow direction breaks the oil droplets into small oil droplets, thereby deteriorating the oil-water separation effect;

[0006] Such as CN201611198617.4, which uses hydrophobic membranes to separate oil and water. This method is generally used in oil wells with small production, and the backwashing is complicated

Images