COMPOSITE WATER-CONTROLLING AND FLOW-LIMITING DEVICE AND SCREEN PIPE THEREOF

Disclosed are a composite water-controlling and flow-limiting device and a screen pipe thereof. The composite water-controlling and flow-limiting device comprises a composite water-controlling screen pipe. The composite water-controlling screen pipe comprises: a base pipe (1); a self-adaptive internal flow control device (3) mounted on the base pipe and used for a circulation channel for fluids inside and outside the base pipe and controlling an opening degree of the circulation channel according to the change in viscosity of different fluids so as to automatically limit flow; a flow control device (4) mounted on the base pipe and adjacent to the self-adaptive internal flow control device for controlling an overflow of the base pipe; and a screen pipe coaxially and threadedly connected to the base pipe, wherein an inner diameter of the screen pipe is the same as that of the base pipe. The composite water-controlling and flow-limiting device and the screen pipe thereof can automatically control the flow of fluid according to fluid characteristics, balance the inflow profile, implement simple and easy-to-operate active water control and oil-stabilizing production, and allow the water-controlling and oil-increasing functions thereof to be effective during the entire production period of an oil well.