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1. (WO2018000781) DOUBLE-CUTTING IMPREGNATED DIAMOND DRILL

Pub. No.:    WO/2018/000781    International Application No.:    PCT/CN2016/112815
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Fri Dec 30 00:59:59 CET 2016
IPC: E21B 10/46
Applicants: CCDC PETROLEUM DRILLING & PRODUCTION TECHNOLOGY CO., LTD.
四川川庆石油钻采科技有限公司
Inventors: FENG, Ming
冯明
YAO, Jianlin
姚建林
CHEN, Xiaobin
陈晓彬
LI, Weicheng
李伟成
LI, Lei
李雷
LIU, Bin
刘彬
Title: DOUBLE-CUTTING IMPREGNATED DIAMOND DRILL
Abstract:
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.