A diamond drill bit with a wedge-shaped matrix lip

Abstract

A diamond drill bit with wedge-shaped carcass lip surface, including a drill body, a carcass lip surface, and a nozzle. It consists of block, carcass wedge surface, hole wall forming part and core forming part, and the whole carcass lip surface is wedge-shaped. The carcass wedge surface, the part forming the hole wall and the part forming the core are all inclined relative to the fan block, and the inclination angle of the carcass wedge surface relative to the upper surface of the fan block, the inclination angle of the part forming the hole wall relative to the outer surface of the fan block, and the part forming the core are opposite to each other. The inclination angles of the inner surfaces of the fan-shaped blocks are all 15-40 degrees. The diamond bit adopts a wedge-shaped matrix lip surface, which makes an effective pre-crushing zone and crushing zone during drilling, eliminates the influence of dynamic loads, and reduces energy consumption in the process of crushing rocks; it is suitable for crushing hard and very hard rocks under complex crack conditions Drilling in rocks and soft-hard interbedded formations, increasing the drilling speed and increasing the footage of the drill bit.

Description

technical field [0001] The invention belongs to the field of diamond drill bit drilling, and in particular relates to a diamond drill bit with a wedge-shaped lip surface of a carcass. Background technique [0002] At present, in the drilling of broken hard and very hard rocks in geological exploration, the selection of drill bits generally adopts impregnated diamond drill bits. Studies have shown that the most influential factor on diamond drill bits is the nature of the rock, especially the hardness and fissure of the rock; as the rock fissure increases, the performance of all types of diamond drill bits decreases. Also, as rock hardness increases, the impact of rock fractures on the performance of diamond bits increases significantly. Because a large amount of coarse-grained rock powder will be formed when drilling into the fractured rock formation, and if they cannot be discharged from the end of the drill bit in time, a large amount of coarse-grained rock powder will be...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an existing drill bit with poor rock breaking effect, low mechanical penetration rate and high energy consumption when breaking hard and very hard rocks under the condition of drilling complex cracks. The diamond bit with a wedge-shaped lip surface of the carcass can increase the drilling speed, increase the drilling footage, and reduce the energy consumption during the drilling process

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