Drill bit capable of enabling well wall to be ceramic

Abstract

The invention discloses a drill bit capable of enabling a well wall to be ceramic. The drill bit comprises a connector, a drill bit body, a wall construction device, drill bit cutting teeth and a combustor, wherein the lower end of the connector is connected with the drill bit body, the wall construction device is installed on the drill bit body, the drill bit cutting teeth are arranged at the lower end of the drill bit body, a central pipeline and a combustion gun are arranged in the connector, the combustion gun is arranged at the lower end of the central pipeline, a flame nozzle is arranged at the lower end of the combustion gun, the combustor is arranged inside the drill bit body, a high temperature gas nozzle is arranged at the lower end of the drill bit body, the two ends of the combustor are communicated with the flame nozzle and the high temperature gas nozzle respectively, and an outer annular pipeline is arranged in the connector and is communicated with an air inlet of the combustion gun. The drill bit can achieve rock breaking through combination of combustion heat energy and mechanical energy, and improve the rock breaking efficiency remarkably. In addition, the well wall is made to be ceramic by the utilization of the combustion heat energy, the smooth and hard well wall is formed, even a lower casing pipe is not needed for well cementation, and the drilling cost is remarkably saved.

Description

technical field [0001] The invention relates to a drill bit capable of ceramicizing the borehole wall. Background technique [0002] The drill bit is a tool that directly contacts the rock during the drilling process and breaks the rock through cutting and stamping. At present, mechanical energy is widely used in drilling engineering to break rocks, and the drill bits used are mainly roller cone bits, PDC bits, diamond bits, etc. The field application shows that the rock-breaking efficiency of the roller cone bit is low, and the footage of a single bit is small, which is prone to downhole accidents such as roller cone sticking; the PDC bit wears fast and is difficult to penetrate; the diamond bit also has slow drilling speed The problem of short service life has seriously affected the speed of oil and gas exploration and development. [0003] In order to improve drilling efficiency, petroleum workers at home and abroad are stepping up research on efficient rock-breaking t...

AI Technical Summary

Problems solved by technology

At present, the drilling depth of the drill bits used for drilling has been limited to about 12,000 meters, and it is impossible to increase the drilling depth.

[0005] To sum up, conventional mechanical rock-breaking tools are not effective enough to increase ROP, and the supporting equipment of new rock-breaking technology cannot be applied industrially. It is urgent to develop a new type of drill bit, which can improve the drilling rate through mechanical-thermal comprehensive rock-breaking methods. speed, save drilling costs, and is of great significance to speed up the exploration and development of oil and gas resources

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