Split single roller bit

Abstract

The invention relates to a split single roller bit. The split single roller bit is mainly composed of a drilling bit jaw, a cone lower body, a cone upper body, teeth, diameter keeping teeth, a steel ball, a retaining plug, an oil mouth, an oil blocking plug and a rectangular sealing ring. The drilling bit jaw is connected with the cone lower body and the cone upper body through a drilling bit palmaxial neck aslant arranged at the lower end of the drilling bit jaw, and in the drilling process, the cone lower body and the cone upper body rotate along with a bit body and also spin around the drilling bit palm axial neck respectively to achieve the task of scraping and smashing rocks of the cone lower body and the cone upper body. A split structure is adopted by the split single roller bit, the teeth scraping efficiency of a roller small end tooth ring and teeth of a middle tooth ring can be improved, the rock smashing efficiency of the bit is improved, conical structures are adopted by the cone lower body and the cone upper body, the split single roller bit is applicable to smashing a hard stratum, and the effective service life of the split single roller bit is prolonged.

Description

technical field [0001] The invention relates to a split type single-cone drill bit used in the fields of oil drilling and geological exploration. Background technique [0002] So far, the drill bit with the widest range of formation adaptation is still the roller cone bit, especially when drilling into hard formations and highly abrasive formations, only the roller cone bit can be relied on. Although the single-cone bit and the tri-cone bit belong to the roller-cone bit, the difference between the two is not only reflected in the number of cones, but it has unique advantages, which are more suitable for strength and strength than the tri-cone bit. Rock formations with high plasticity are also suitable for hard interlayers and other complex formations that are difficult for PDC bits to deal with. [0003] The single cone bit is mainly composed of a bit body and a cone. The bit body is connected to the cone through the offset palm journal at the lower end. The cone not only r...

AI Technical Summary

Problems solved by technology

At present, most of the single-cone bits that have been used in actual production have only one cone body, that is, the cone body has only one rotation speed when it rotates around the journal of the tooth palm, which results in the teeth from the small end ring gear to the large end ring gear. The scraping efficiency will show certain rules: the tooth scraping efficiency of the small-end ring gear is the lowest, the tooth scraping efficiency of the large-end ring gear is the highest, and the tooth scraping efficiency of the middle ring gear is between the two, which will affect the single-cone bit impact on rock breaking efficiency

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