Segmented Drill Bit Crown Slots for Direct Fluid Cooling
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Solution Overview
Problem
Conventional drill bits lack direct fluid flow on the cutting surface, leading to reduced cutting removal rates, increased wear, and low penetration rates due to inadequate heat removal and fluid velocity.
Innovation Solution
A diamond-impregnated drill bit design featuring a crown with multiple crown portions and a base surface that defines a slot, allowing for direct fluid flow to the cutting faces through bores, enhancing fluid velocity and heat removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional drill bits with central waterway and side channels are used, then the structure is simple and easy to manufacture, but the fluid velocity on the cutting surface is low and heat removal is inadequate
Solution Approach 1:
The crown is divided into multiple crown portions (first, second, third, fourth crown portions) with cutting faces spaced apart, creating multiple slots for fluid flow. This segmentation allows direct fluid delivery to multiple cutting surfaces simultaneously, improving heat removal and cutting efficiency while maintaining a manageable structural complexity through modular repetition of the crown portion pattern.
Solution Approach 2:
The drill bit design provides different fluid flow characteristics to different regions: the slots between crown portions deliver high-velocity fluid directly to cutting faces for localized cooling and flushing, while the central waterway provides overall structural support and additional fluid supply. This local differentiation optimizes both heat removal at critical cutting zones and overall structural integrity.
2Productivity
If conventional drill bits without direct fluid flow to cutting surface are used, then the manufacturing is simpler, but the cutting removal rate decreases and wear increases
Solution Approach 1:
The crown is divided into multiple crown portions (first, second, third, fourth crown portions) with cutting faces spaced apart, creating multiple slots for fluid flow. This segmentation allows direct fluid delivery to multiple cutting surfaces simultaneously, improving heat removal and cutting efficiency while maintaining a manageable structural complexity through modular repetition of the crown portion pattern.
Solution Approach 2:
The design transitions from conventional side-channel fluid delivery to direct axial fluid delivery through slots between crown portions. This dimensional change in fluid flow path allows high-velocity fluid to reach the cutting faces directly, dramatically improving cutting removal rates and reducing wear while the modular crown portion structure keeps manufacturing feasible.
3Productivity
If conventional drill bits with no channels on cutting surface are used, then the structure is simpler, but the penetration rate is reduced
Solution Approach 1:
The crown is divided into multiple crown portions (first, second, third, fourth crown portions) with cutting faces spaced apart, creating multiple slots for fluid flow. This segmentation allows direct fluid delivery to multiple cutting surfaces simultaneously, improving heat removal and cutting efficiency while maintaining a manageable structural complexity through modular repetition of the crown portion pattern.
Solution Approach 2:
The drill bit design provides different fluid flow characteristics to different regions: the slots between crown portions deliver high-velocity fluid directly to cutting faces for localized cooling and flushing, while the central waterway provides overall structural support and additional fluid supply. This local differentiation optimizes both heat removal at critical cutting zones and overall structural integrity.
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 design improves cutting removal rates, penetration rates, and wear resistance by providing high-velocity fluid flow and effective heat management directly to the cutting surface.
Implementation Method 1
The interior space can be configured to receive water or other drilling fluid during use of the drill bit
Implementation Method 2
The base surface cooperates with the inner surfaces of the plurality of crown portions to define a slot
Implementation Method 3
the lack of water flow can also minimize the removal of heat from the cutting surface during high-rotational operation of the bit
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A drill bit for cutting a hole in a formation. The drill bit has a shank and a crown. The crown has a plurality of crown portions that are spaced about an operative circumference of the drill bit. The shank and crown cooperate to define an interior space that receives water or other drilling fluid. Each crown portion has two longitudinal edges, an outer surface, at least one inner surface and a cutting face. The crown has a base surface that is spaced from the cutting faces of the crown portions and cooperates with the inner surface of each of the two crown portions to define a slot.