Combined single cone bit with rolling gear ring

Abstract

The invention discloses a combined single cone bit with a rolling gear ring. The combined single cone bit comprises a bit body (1), a cone (3), cone teeth (4) and a palm journal (15); the bit body (1)is provided with gauge protection teeth (2), the palm journal (15) is arranged at the lower end of the bit body (1), the cone (3) is rotatably connected with the palm journal (15), the cone (3) is rotatably connected with the rolling gear ring (6), a needle bearing (11) is arranged between the inner circle of the rolling gear ring (6) and the cone (3) and used for achieving relative rotating of the cone (3) and the rolling gear ring (6), rolling gear ring teeth (13) are arranged on the rolling gear ring (6), a fixed cutting structure (8) is fixed to one end of the palm journal (15), and fixedcutting teeth (9) are evenly distributed on the fixed cutting structure (8). The combined single cone bit has the advantages that the rock breaking efficiency of the bit is improved advantageously, bit balling is effectively prevented, and the service life of the bit is prolonged.

Description

technical field [0001] The invention relates to the technical fields of drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, hydrology, etc., in particular to a combined single-cone drill bit with a rolling ring gear. Background technique [0002] As a main tool for breaking rock formations, roller cone bits have been widely used in oil drilling and geological drilling, and mainly include single cone bits, three-cone bits and multi-cone bits. The roller cone on the roller cone bit forms a rotational connection with the drill body through the bearing system. When the drill bit is working, the rotation of the drill bit body drives the roller cone to rotate around the axis of the drill bit, and at the same time the roller cone rotates around its own axis. The teeth on the roller cone are in the above two types Complicated motion under the combination of motion, which belongs to the non-fixed cutter bit....

AI Technical Summary

Problems solved by technology

At present, the water hole nozzle of the single cone bit is generally located on the bit body of the upper part of the cone, or a water eye hole is added at the front of the cone. The cuttings produced by the teeth breaking rocks, and the cuttings retained between the cone and the bottom of the well tend to form mud bags, which affect the drilling speed of the drill bit and limit the performance of the drill bit

At the same time, the existing single-cone bit has only one set of bearing system, and the bearing is prone to damage such as pitting and cracks at high speeds, so the bearing has become a key issue that limits the service life of the single-cone bit

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