Diamond bit with wedge-shaped matrix crown contours

Abstract

The invention provides a diamond bit with wedge-shaped matrix crown contours. The diamond bit with wedge-shaped matrix crown contours comprises a drill bit body, the matrix crown contours and water ways. The matrix crown contours are arranged on the drill bit body in a surrounding mode. The water ways are arranged between the matrix crown contours. Each matrix crown contour is composed of a fan-shaped block, a matrix wedge surface, a hole wall forming portion and a core forming portion, wherein the whole matrix crown contour is in a wedge shape, the matrix wedge surface, the hole wall forming portion and the core forming portion both incline relative to the fan-shaped block, and the inclination angle of the matrix wedge surface relative to the upper surface of the fan-shaped block, the inclination angle of the hole wall forming portion relative to the outer surface of the fan-shaped block and the inclination angle of the core forming portion relative to the inner surface of the fan-shaped block all range from 15 degrees to 40 degrees. According to the diamond bit, the wedge-shaped matrix crown contours are adopted, an effective pre-breaking area and a breaking area are generated during drilling, the influence of a dynamic load is eliminated, the energy consumption is reduced during rock breaking, and the drill bit is suitable for breaking hard rock and quite hard rock under a complicated crack condition and drilling a rock stratum of a stratum with interbedding of soft and hard rocks and increases the drilling rate and the footage per 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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