Powerful drill bit for cone

Abstract

The invention discloses a powerful drill bit for a cone. The powerful drill bit comprises a drill bit body. The drill bit body is of a chisel-edge corrected S-shaped structure. Cutting edges are arranged on the side end face of the drill bit body. A chip groove is formed between the cutting edges. The cutting edges and the chip groove are each in a spiral shape. The back taper ratio of the drill bit body is 0.25 / 100 mm. The core thickness ratio of the drill bit body is 30% of the cutter diameter. The slot back ratio of the drill bit body is 1.1 / 1. The helical angle of the drill bit body is 15 degrees. The main drill sharp angle of the drill bit body is 125 degrees. By means of the manner, the powerful drill bit can be suitable for machining the cone, through the special slot type and the large-taper design of the powerful drill bit, the surface smoothness of the cone is improved, the powerful drill bit is made of a German K40 wearproof material, multiple-time coping and reuse can be achieved, the environment protection property of a cutter is improved, high-rotation-speed high-feed machining can be achieved, and machining efficiency is improved.

Description

technical field [0001] The invention relates to the field of drill bits, in particular to a powerful drill bit for roller cones. Background technique [0002] At the present stage, deep well drilling is mainly used to extract oil. However, most of the oil is extracted in rock formations. Therefore, the cost of oil extraction with ordinary drill bits is very high, and the depth of the ideal rock formation cannot be reached. In this case, oil extraction companies have widely adopted roller cone drills with better rigidity and life. [0003] At present, there are Japanese Kyocera, Japan Mitsubishi, American Kennametal, German Walter, etc., which are foreign drill bit manufacturers for processing roller cones. However, due to foreign technology blockade and high product prices, there are few drill bits suitable for processing roller cones in the oil exploration industry. Domestically made roller cone bits are mostly processed with ordinary non-ferrous metal drill bits. This kin...

AI Technical Summary

Problems solved by technology

[0003] At present, there are Japanese Kyocera, Japan Mitsubishi, American Kennametal, German Walter, etc., which are foreign drill bit manufacturers for processing roller cones. However, due to foreign technology blockade and high product prices, there are few drill bits suitable for processing roller cones in the oil exploration industry.

Domestically made roller cone bits are mostly processed with ordinary non-ferrous metal drill bits. This kind of drill bit requires the matching hole to have the characteristics of high dimensional accuracy, surface roughness Ra not exceeding 1.25, and no straight taper in the hole. The processing is extremely difficult. Drilling, reaming after tempering, and fine reaming after quenching used in the past have very low processing efficiency

Images