Drill Bit Flushing System Angled Secondary Passageway
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Solution Overview
Problem
Button drill bits with two flushing holes experience excessive steel erosion and poor air circulation, leading to reduced lifespan and rate of penetration, while those with three flushing holes have a smaller insert surface area, compromising both rate of penetration and lifespan.
Innovation Solution
A drill bit design featuring a flushing system with at least one main opening on the cutting surface and one secondary opening on the peripheral surface, angled and positioned to optimize pressurized fluid flow, allowing for efficient debris removal and improved air circulation without compromising the insert surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If button drill bits are equipped with three flushing holes to improve air circulation and debris removal, then flushing efficiency is improved, but the insert surface area is reduced
Solution Approach 1:
The flushing system is segmented into multiple independent passageways (first, second, and third passageways) with distinct functions. The first passageway handles primary flushing, while the second and third passageways provide secondary flushing and air circulation, allowing each passageway to be optimized for its specific function without compromising the overall insert surface area.
Solution Approach 2:
Different regions of the drill bit are assigned different functions: the cutting surface area maximizes insert placement, while specific peripheral regions contain the flushing passageways. This local differentiation allows the insert surface area to be maximized while still providing adequate flushing capability through strategically positioned passageways.
2Area of stationary object
If button drill bits are equipped with two flushing holes to maintain insert surface area, then insert surface area is preserved, but air circulation and debris removal are insufficient
Solution Approach 1:
The flushing function is segmented across three separate passageways instead of using just two holes. This segmentation allows each passageway to contribute to different aspects of flushing and air circulation, achieving superior air circulation while maintaining adequate insert surface area.
Solution Approach 2:
The third passageway is positioned at a different location and orientation relative to the first two passageways, creating a three-dimensional flushing network. This spatial arrangement enhances air circulation patterns and debris removal efficiency without requiring additional holes that would compromise insert surface area.
3Productivity
If the number of flushing holes is increased to improve rate of penetration, then rate of penetration is improved, but the structural complexity of the drill bit increases
Solution Approach 1:
Multiple flushing functions are merged into an integrated system where the first, second, and third passageways work together as a unified flushing network. This merging allows the system to achieve high rate of penetration through coordinated action of multiple passageways while avoiding the complexity of completely separate flushing mechanisms.
Solution Approach 2:
The flushing passageways serve multiple functions: primary debris removal, secondary air circulation, and cooling of the cutting surface. This multi-functionality allows the system to improve rate of penetration through enhanced flushing while avoiding the need for additional dedicated components that would increase structural complexity.
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 enhances the rate of penetration and total lifespan of the drill bit by ensuring effective flushing and uniform fluid movement around the cutting surface, maintaining a balance between debris removal and insert surface area.
Implementation Method 1
The inlet facilitates supply of pressurized fluids to flush the cut matter from the bore hole
Data Source
AI summary
A flushing system in a drill bit, which has a body that defines the flushing system, can include an inlet to facilitate supply of pressurized fluids into a bore hole. A cutting surface of the drill bit is provided with a main opening that defines a main passageway in communication with the inlet. A peripheral surface of the drill bit is provided with a secondary opening that defines a secondary passageway in communication with the inlet. The secondary passageway is disposed at an angle from a horizontal reference plane. The horizontal reference plane is defined between the inlet and the origin of the main passageway and is perpendicular to a central longitudinal axis of the body of the drill bit. An origin of the secondary passageway is at a distance from the origin of the main passageway.