Low-nozzle-holder roller bit

Abstract

The invention discloses a low-nozzle-holder roller bit. The roller bit comprises a drill rod, a bit leg, a roller and a connecting seat, wherein high-pressure water injection hole channels are formedin the two sides of the interior of the drill rod correspondingly and penetrate through the drill rod, flow guide channels are symmetrically formed in the two sides of the interior of the bit leg correspondingly, high-pressure water injection nozzles are symmetrically formed in the two sides of the bottom end of the bit leg correspondingly, and the flow guide channels, the high-pressure water injection hole channels and the high-pressure water injection nozzles communicate with one another. According to the roller bit, by forming the high-pressure water injection hole channels in the drill rod, the interior of the roller bit is cooled, it is guaranteed that the temperature of the roller bit does not exceed a standard in the drilling process, high-temperature damage is prevented from occurring in the roller bit, meanwhile, a high-pressure water flow is sprayed into a stratum through the high-pressure water injection nozzles, the stratum is effectively broken, drilling of the roller bitis easier, the drilling speed of the roller bit is higher, the working efficiency of the roller bit is further improved, friction of a connecting base to a sealing ring is reduced by forming oil dividing channels in the bit leg, the service life of the sealing ring is prolonged, and the stability and safety of the roller bit in the drilling process are guaranteed.

Description

technical field [0001] The invention relates to the technical field of geological drilling equipment, in particular to a roller cone bit with a low nozzle seat. Background technique [0002] The roller cone bit is the most widely used type of drilling bit. When the roller cone bit is working, the cutting teeth alternately contact the bottom of the well, the rock-breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to penetrate into the formation; the total length of the working blade is large, so the wear is relatively reduced. Roller cone bits can adapt to a variety of formations from soft to hard. [0003] However, in the existing roller cone bit, during the drilling process, the friction between the roller cone and the formation generates high temperature, which easily leads to the problem of damage to the roller cone bit. Therefore, we propose a low nozzle seat roller cone...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing roller cone bit, during the drilling process, the friction between the roller cone and the formation generates high temperature, which is easy to cause damage to the roller cone bit. Therefore, we propose a low nozzle seat roller cone bit.

Images