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针对低渗透油田注入水深度处理技术的不足，研制了注水站用及井口注水用三级精细过滤器，其滤心的过滤原理是固定孔机械过滤，即通过滤心对杂质的直接拦截、扩散拦截和惯性碰撞，使杂质沉淀在滤材前面，达到过滤的目的。采用带内外支承体的折叠式滤心结构，滤心抗破坏能力强，有效过滤面积大，使用寿命长；采用玻璃纤维复合材料作为滤材，保证了过滤后的水水质达标，而且价格较低，很适合于低渗透油田的注入水深度处理。
In order to deal with the deficiency of water treatment technology in low permeability oilfield, a three-stage fine filter for water injection station and wellhead waterflooding was developed. The filter principle of the filter was mechanical filtration of fixed orifice, that is, direct interception and diffusion Interception and inertial collision, so that impurities in the filter sedimentation in front of the filter to achieve the purpose. Adopting folding filter structure with inner and outer supports, the filter core has strong anti-sabotage ability, large effective filter area and long service life. The glass fiber composite material is used as the filter material to ensure that the filtered water quality meets the standard and the price is lower , Is very suitable for the injection of low permeability oilfield water depth treatment.