Roof-Bolt Drill Bit Radial Fluid Port Design
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Solution Overview
Problem
Drill bits used in subterranean drilling operations face issues with debris clogging ports, leading to inadequate cooling and material removal, which causes wear and damage, and results in delays and production losses, especially in safety-critical environments like mine tunnels.
Innovation Solution
The design of a roof-bolt drill bit with a fluid port aligned at an angle and radially offset from the internal passage, along with a debris channel to direct debris away from the cutting element, enhances fluid flow and debris removal, preventing clogging and maintaining effective cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilling fluid is pumped through internal passage to cool cutting elements and clear debris, then cooling and debris removal are improved, but ports become clogged with debris preventing effective fluid delivery
Solution Approach 1:
The patent introduces a radial dimension to the fluid delivery system by creating a fluid port that extends radially outward from the internal passage to a port opening on the outer surface of the bit body. This radial extension allows fluid to reach cutting elements through a different spatial pathway, bypassing the clogging issue in the axial internal passage while maintaining effective cooling and debris removal.
2Productivity
If vacuum is used to draw material away from cutting region, then debris removal is improved, but vacuum ports become clogged or lose suction
Solution Approach 1:
The vacuum system is enhanced by adding a radial component through the fluid port structure. The port opening on the outer surface creates an additional dimension for vacuum suction, allowing debris to be drawn away from the cutting region through a radial pathway that is less susceptible to clogging compared to traditional axial vacuum ports.
3Productivity
If insufficient annulus is present in borehole, then adequate air flow cannot reach vacuum ports, but increasing annulus reduces drilling precision
Solution Approach 1:
The fluid port structure extends the vacuum suction capability to the outer surface of the bit body, creating a radial vacuum field that does not depend on the annular space in the borehole. This allows effective debris removal through a different spatial mechanism that is independent of borehole annulus dimensions, thereby maintaining drilling precision while ensuring adequate air flow for debris removal.
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
This configuration improves the drill bit's efficiency by ensuring consistent fluid delivery and debris removal, reducing downtime and production losses, and enhancing the longevity of drilling equipment in challenging environments.
Implementation Method 1
a fluid port extending from the internal passage to a port opening defined in the bit body
Implementation Method 2
In order to cool the cutting elements and clear debris away from the cutting area during drilling, a drilling fluid such as drilling mud or air may be pumped into a borehole being drilled
Implementation Method 3
a debris channel to direct debris away from the cutting element
Implementation Method 4
In other embodiments, a vacuum may be used to draw material away from the cutting region and to cool the cutting elements
Data Source
AI summary
A method for manufacturing a roof-bolt drill bit includes providing a bit body rotatable about a rotational axis, the bit body having at least two cutting element support structures, each of the at least two cutting element support structures including a mounting surface for mounting a cutting element to the bit body and a trailing support surface. The method includes forming an internal passage within the bit body, the internal passage extending from a rearward opening defined in the rearward end of the bit body through at least a portion of the bit body, and forming a fluid port within each of the at least two cutting element support structures, each fluid port extending from the internal passage to a port opening defined in the corresponding cutting element support structure, each port opening being positioned adjacent to the mounting surface of the corresponding cutting element support structure.