Core Drilling Drill Bit with High-Pressure Jet Nozzles
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Solution Overview
Problem
As the diameter of the core increases, breaking or cutting the core becomes more uncontrollable, making core drilling inefficient, and often results in tedious hole milling instead, especially in non-vertical drilling applications like sewer rehabilitation, where the core is unmanageable and difficult to handle.
Innovation Solution
A drill bit with a hollow-cylindrical core tube and high-pressure jet nozzles is used for combined material removal, where mechanical removal elements are complemented by high-pressure blasting media to efficiently manage and separate the drill core, allowing for improved handling and efficiency in both vertical and horizontal drilling, including larger boreholes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the diameter of the drill core increases, then the drilling capacity is improved, but the core becomes unmanageable and difficult to handle
Solution Approach 1:
The drill core is segmented into smaller manageable sections using high-pressure water jets that cut the core longitudinally into multiple parts. These segmented sections can then be easily removed from the core barrel through the drainage holes, solving the handling difficulty of large-diameter cores while maintaining the ability to drill large boreholes.
2Productivity
If mechanical breaking or cutting of the core is used, then the core can be removed, but the process becomes uncontrollable and inefficient
Solution Approach 1:
The patent uses high-pressure water jets (hydraulic system) to cut and remove the drill core instead of mechanical breaking methods. The water jets are delivered through nozzles positioned at the front of the core barrel, providing controlled and efficient core removal that is both productive and easy to operate, eliminating the uncontrollable nature of mechanical breaking.
3Productivity
If high-pressure jets are used to remove material, then drilling efficiency is improved, but the complexity of the drilling device increases
Solution Approach 1:
The high-pressure water jet system serves multiple functions: it removes drill cuttings from the borehole, cools the removal elements, and cuts the drill core into manageable sections. This multi-functionality improves drilling efficiency while minimizing the increase in device complexity, as a single hydraulic system performs multiple tasks that would otherwise require separate mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enables efficient core drilling and handling of larger diameters by using high-pressure jets to break down the drill core into manageable sections, reducing the need for extensive milling and improving drilling efficiency across various materials and orientations.
Implementation Method 1
high-pressure jet nozzles (2) directed into the interior (5) onto the drill core (8)
Implementation Method 2
drill bit (1) with a hollow-cylindrical base body, hereinafter referred to as the core tube (5)
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to methods and devices for carrying out core drilling in a material using a drilling device 40, which employs a drill bit 1. It also relates to drill bits 1 that are designed with a hollow cylindrical core tube 5, which has a end plate 13 at its rear end 17 and material removal elements 4 at its front end 16, which serves for material removal, as well as at least two high-pressure jet nozzles 2, which are connectable to a high-pressure source 30 of a jet medium 3. The high-pressure jet nozzles 2 are arranged on the inner surface 6 of the core tube 5 and/or on its end plate 13 and are directed into the interior of the core tube 5. As a result of a combined forward and rotary movement of the drill bit 1, a core 8 is formed, from which material is removed by means of the jet medium 3. (Fig. 1)