Rock drillability determining method capable of determining drill bit wear

Abstract

The invention relates to a rock drillability determining method capable of determining drill bit wear. The rock drillability determining method comprises the following steps of (1) preparing a rock specimen of a rock to be determined; (2) cleaning, drying and weighing a micro drill bit blade for a rock drillability determining experiment; (3) performing a routine indoor rock drillability determining method experiment, and recording time required when a drill bit blade drills to a specified depth; (4) cleaning, drying and weighing the micro drill bit blade after the experiment; (5) calculating the wearing capacity of the micro drill bit blade used in the experiment; and (6) building a correlation model between a rock drillability level value, drilling time and micro drill bit wearing capacity, and determining rock drillability level value capable of determining the drill bit wear. According to the rock drillability determining method disclosed by the invention, a conventional determining method is improved by introducing a drill bit wear factor, the rock drillability determining experiment is performed on rocks of different lithological characters, the influence of the rock drillability caused by micro drill bit wearing capacity can be analyzed, so that reliable data can be provided for drill bit design, drill bit optimization and drill bit usage.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses two devices: one measures how well it works when used alone or together (a measuring tool) while another analyzes its impacts from small bits that are worn off during drilling operations. By incorporating this new technique into the process, better testing results may be achieved even if there're various types of rocks being drilled.

Problems solved by technology

This patents discusses various ways how rocks resist cutting with high pressure during drilling operations (known as breakthrough). However, current methods involve either measuring static characteristics like strength at failure by performing tests on samples taken from underground environments without taking into account factors related to fracture toughness. These techniques may lead to decreased accuracy due to changes caused by changing conditions over time. Therefore, these technical problem addressed by the patented technology involves developing better tools for predicting rock drilility based upon both dynamic measurements made while drilling holes and nonlinear physical interactions between them.

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