PDC (Polycrystalline Diamond Compact) drill bit with double-channel structure

The invention discloses a PDC drill bit with a double-flow-channel structure, and belongs to the technical field of drilling and production equipment. The PDC drill bit with the double-flow-channel structure comprises an integrated drill bit body, blades, gauge protectors and isolation blades, the multiple blades are distributed on the circumference of the top of the drill bit body, the gauge protectors are connected to the lower portions of the blades, cutting teeth beneficial for cutting rocks are arranged on the upper portions of the blades, a chip removal flow channel is formed between every two adjacent blades, and the chip removal flow channels are communicated with the isolation blades. The double-flow-channel isolation blade is of a three-dimensional curved surface structure and is installed on the gauge protection section of the flow channel groove, the flow channel groove is divided into an inner flow channel and an outer flow channel through the blade, and the outer flow channel is wide in inlet an