The Design of Blade Type Diamond-Impregnated Bit and It’s Application in Well Hashan 101

In order to improve the ROP in the volcanic rock formation of the Hashan Area in Junggar Basin, increase the footage of single drill bit, and reduce the risks of wellbore instability and caving, the bit design for rapid drilling was carried out. The mechanical performance of the formation rock was analyzed by a full-scale coring indoor test. On this basis, a new matrix alloy material was developed to improve the grinding performance of the bit. Then, the impregnated cutting block was used to enhance the rock breaking ability, and the blade-type impregnated bit structure and the anti-sticking flow path were optimized. The caving falling into the oblique chip flute could be pushed upward to prevent the bit from being stuck. It was found that the ultra-fine alloy materials could be bonded to each other to form a firm adhesion, and the mechanical performance of bit matrix improved by more than 30%. The blade-type impregnated drill bit was used in the volcanic rock formation of Well Hashan 101 associated with a high-speed and high-torque screw power drill, the single bit footage was increased by 4 times and the ROP was increased by 54.3%. This technology also effectively reduced the risk of caving and sticking, and became an effective technical measure for safe and efficient drilling in such formations.