Diamond-impregnated bit with double cutting structures

Abstract

The invention discloses a diamond-impregnated bit with double cutting structures, belonging to the technical field of drilling equipment for petroleum and natural gas, mine engineering, building foundation engineering construction, geology, hydrology and the like, and solving the problems in the prior art that a diamond-impregnated bit with a single cutting structure is short in service life in the complex stratum which is difficult to be drilled and thus adverse effects on geological exploration are caused. The diamond-impregnated bit comprises an API joint and a bit body connected with the API joint, wherein a center water channel, a plurality of blades and water channels between two adjacent blades are arranged on the bit body; double cutting structure impregnated A1 type teeth, impregnated A type teeth, impregnated B type teeth, impregnated C type teeth and double cutting structure impregnated A2 type teeth are arranged on the upper surfaces of the blades; large granular natural diamonds are impregnated on the cutting surfaces of the double cutting structure impregnated A1 type teeth and the double cutting structure impregnated A2 type teeth, and artificial small granular diamonds are uniformly and orderly arranged in the double cutting structure impregnated A1 type teeth and the double cutting structure impregnated A2 type teeth; and small granular diamonds are arranged in the impregnated A type teeth, the impregnated B type teeth and the impregnated C type teeth. The diamond-impregnated bit disclosed by the invention is used for drilling.

Description

technical field [0001] An impregnated diamond drill bit with a double-cutting structure is used for drilling, and belongs to the technical field of drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, and hydrology. Background technique [0002] The impregnated diamond bit uses small-grain diamond as the cutting element, which has the characteristics of high compression resistance, strong wear resistance, and good impact resistance. It is suitable for drilling formations that are difficult for PDC bits and roller cone bits. It has high hardness , high abrasiveness, etc. However, the existing diamond-impregnated drill bits use relatively fine diamond particles, which have a low efficiency for volume crushing of rock formations. Due to the high interface energy between the diamond and the matrix, the wettability and bonding ability between the diamond and the matrix are poor, the bonding strength is l...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a kind of impregnated diamond bit with double-cutting structure in view of the above-mentioned inadequacy, solves the impregnated diamond bit of single cutting structure in the prior art, and the service life of the impregnated diamond bit is short in difficult to drill and complex formations, which is very important for geological exploration. problems that adversely affect

Images