Fiber ball filter is a new type of water quality precision treatment equipment in pressure filter. Previously in oily sewage reinjection treatment has been used in the double filter material filter, walnut shell filter, sand filter, etc. Especially in low permeability reservoir fine filtration technology can not meet the requirement of water injection in low permeability reservoir. The fiber ball filter can meet the standard of oily sewage reinjection. It is made of a special fiber silk synthesized from a new chemical formula. The main feature is the essence of the improvement, from the fiber filter material of the oil – wet type to the water – wet type. The high efficiency fiber ball filter body filter layer uses about 1.2m polyester fiber ball, raw water from top to bottom into the outflow.