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|1. (WO2018000781) DOUBLE-CUTTING IMPREGNATED DIAMOND DRILL|
|Applicants:||CCDC PETROLEUM DRILLING & PRODUCTION TECHNOLOGY CO., LTD.
|Title:||DOUBLE-CUTTING IMPREGNATED DIAMOND DRILL|
Disclosed is an impregnated diamond drill bit having a double cutting structure. The impregnated diamond drill bit comprises an API connector (12), a drill body (11) connected to the API connector (12). A central channel (2), a plurality of blades (13) and a water channel between two adjacent blades (13) are provided on the drill body (11). On an upper surface of the blades (13), double-cutting structure impregnated A1-type teeth (1), impregnated A-type teeth (4), impregnated B-type teeth (5), impregnated C-type teeth (6) and double-cutting structure impregnated A2-type teeth are provided. Cutting surfaces of the double-cutting structure of the impregnated A1-type teeth (1) and the double-cutting structure of the impregnated A2-shaped teeth (8) are embed with large particles of natural diamond, and the internal of the same are uniformly arranged with small particles of artificial diamond. Small particles of diamond are arranged in the impregnated A-type teeth (4), the impregnated B-type teeth (5) and the impregnated C-shaped teeth (6). The present application solves the problem that the diamond cutting bit of the single cutting structure in the prior art has a short life span in complicated strata which are difficult for drilling, and has a negative impact on geological prospecting.