Modular cutting tooth with controllable drilling specific pressure

Abstract

The invention discloses a modular cutting tooth with a controllable drilling specific pressure. The modular cutting tooth comprises a module (1) and module units (2). The modular cutting tooth disclosed by the invention serves as a cutting unit of a drill bit, and the combinational design of the shapes, the specifications and the numbers of the module and the module units and the optimal selection of materials of the module and the module units are carried out according to the rock mechanical properties of a drilled stratum and the drilling requirements, so that the effective cutting edge length of the cutting unit at a specific part of the drill bit is controlled, the constant specific pressure of the cutting unit of the drill bit during the process of drilling is maintained, the effective wearing volume of the cutting unit is greatly increased, and the effective rate of utilization of the cutting unit is increased. Due to the modular cutting tooth, the average mechanical penetration rate and the drilling footage of the drill bit under complex geological conditions, in particular hard formations or abrasive formations, can be greatly increased, the service life of the drill bit can be prolonged, and the drilling cost is reduced.

Description

technical field [0001] The invention belongs to the field of technical equipment such as oil and gas drilling engineering, mining, geological drilling, construction engineering, tunnel engineering, shield tunneling and non-excavation, and relates to a modular tooth arrangement used on a drill bit, and a module with controllable drilling specific pressure cutting teeth. 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 punching. PDC drill bits (Polycrystalline Diamond Compact Bits) rock-breaking forms are cutting and shearing rocks, and are more and more widely used in drilling, geology and even construction engineering, and the proportion of use in drilling engineering is increasing. Under the ideal working condition that the centerline of the drill bit coincides with the centerline of the wellbore, the movement trajectory of each cutting tooth is a relatively fixed conce...

AI Technical Summary

Problems solved by technology

However, none of them can effectively solve the problem that the actual wear volume of the diamond layer of the composite sheet accounts for a small proportion of the total diamond volume when the drill bit fails.

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