Liquid phase discharge plasma impact wave PDC drill bit

Abstract

The invention relates to a liquid phase discharge plasma impact wave PDC drill bit, which comprises a drill bit body. Drill bit cutter wings are arranged at one end of the drill bit body at intervalsin the circumferential direction, cutting teeth capable of mechanically cutting rock are arranged on the drill bit cutter wings, and a well drilling liquid flowing channel is formed in the center of the drill bit body; a center water hole communicating with the well drilling liquid flowing channel is formed in the center of one end of the drill bit body in a penetrating mode, a center impact wavegenerator is arranged in the center water hole in a connected mode, and an edge water hole communicating with the well drilling liquid flowing channel is formed in the side wall of one end of the drill bit body in a penetrating mode; and an edge impact wave generator is arranged in the edge water hole in a connected mode, and the center impact wave generator and the edge impact wave generator areused for generating liquid phase discharge plasma impact waves capable of impacting and crushing the rock. According to the liquid phase discharge plasma impact wave PDC drill bit, by taking rock crushing through the liquid phase discharge plasma impact waves as the main and mechanical rock crushing as the auxiliary, rock drillability is improved, the well drilling speed is increased, the rock crushing efficiency of hard strata is improved, the service life of the drill bit is long, and use and promotion are facilitated.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling engineering, in particular to a liquid-phase discharge plasma shock wave PDC drill bit suitable for drilling deep hard formations and abrasive formations. Background technique [0002] my country's oil and gas exploration and development have shifted from medium and shallow layers to deep oil and gas resources. In the process of drilling deep wells and ultra-deep wells, the formations are dense, strong, and abrasive. Conventional PDC bits use mechanical rock breaking, and their mechanical energy utilization rate is low. Lead to slow drilling speed, long cycle and high cost. Therefore, it is urgent to find new drilling methods to improve the efficiency of drilling and breaking rocks, so as to realize the rapid and low-cost development of oil and gas reservoirs. [0003] Therefore, relying on years of experience and practice in related industries, the inventor proposes a liquid-phase disc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid-phase discharge plasma shock wave PDC drill bit, which overcomes the problems of incompatibility, slow drilling speed, low efficiency and low drill bit life of the existing PDC drill bit for deep complex and difficult-drilling formations. Liquid-phase discharge plasma shock wave rock breaking is the main method, supplemented by mechanical rock breaking, which improves rock drillability, speeds up drilling, improves rock breaking efficiency in hard formations, and has a long life of the drill bit, which is conducive to popularization and use

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