Parallel dual-tube separated layer water injection string

The utility model discloses a parallel dual-tube separated layer water injection string, which comprises an oil tube (1), an oil tube (2), a dual-tube packer (3), a single-tube packer (4), a hydraulic slip (5), a water injection nipple (6), an insertion seal (7), a setting device (8), a screen pipe (9) and a plug (10), wherein the oil tube (1), the dual-tube packer (3), the single-tube packer (4), the hydraulic slip (5), the setting device (8), the screen pipe (9) and the plug (10) are fixedly connected sequentially; the oil tubes (1 and 2) are parallelly mounted on the dual-tube packer (3); and the water injection nipple (6) is mounted at the lower part of the dual-tube packer (3). The parallel dual-tube separated layer water injection string injects water into corresponding water injection layers through the screen pipe (9), the water injection nipple (6), and oil sleeve annuluses between a sleeve (11) and the oil tube (1) as well as between the sleeve and the oil tube (2). As a result, the purpose of separ