Oil field water injection valve

The invention relates to an oilfield water injection valve and belongs to the technical field of valves. The double-way valve comprises a direct-current gear motor and is structurally characterized by further comprising a valve body, a double-way screw, a lower pressing block, an upper pressing block and a valve element, a valve cavity is formed in the valve body, the lower pressing block, the upper pressing block and the valve element are all installed in the valve cavity, and the valve element is located between the lower pressing block and the upper pressing block; a motor shaft of the direct-current gear motor is connected with one end of the two-way screw rod, the other end of the two-way screw rod is installed in the valve cavity through a bearing, and the lower pressing block and the upper pressing block are both matched with the two-way screw rod. The valve element comprises an inner pipe, the inner pipe is located between the lower pressing block and the upper pressing block, the inner pipe is made o