Water injection is an effective way to maintain reservoir pressure, achieve high and stable oil production and improve the effect of oil field development. There are two types of water injection: general water injection and separate water injection. Most oil fields are heterogeneous stranded sandstone, each formation is very different from each other, these differences in the water injection process have a great influence. Injection wells in the internal oil deposit tend to develop into separate types of water injection. In the oil field, separate water injection is a technological measure to regulate the distribution of pressure between the formations and to improve the coefficient of action. Currently, with separate water injection, there are problems with severe corrosion of metal pipe, a complex operation of simultaneously-separate water injection, and expensive cost of operations and testing.

The service life of at least 50 years. The warranty period is 2 years from the date of manufacture.