Strip-Shaped Drill Bit Nozzle for Uniform Cooling
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Solution Overview
Problem
Conventional PDC drill bits suffer from uneven cooling and chip removal effects across cutting teeth, with concentrated cylindrical jet flows causing erosion and premature failure, particularly affecting cutting teeth on the shoulder of the drill bit where rock cutting volume and heat generation are highest.
Innovation Solution
A drill bit nozzle with a strip-shaped outlet configured to eject a sheet-like jet flow, providing uniform cooling and chip removal across all cutting teeth while avoiding excessive concentration of the jet flow, which can erode the teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circular nozzle is used to eject a cylindrical jet flow, then the cooling and chip removal effects on the cutting teeth facing the jet flow are the best, but the cooling and chip removal effects on other cutting teeth are poor and the concentrated jet flow causes erosion around tooth holes
Solution Approach 1:
The single circular nozzle is segmented into multiple nozzles arranged in a specific pattern. Each nozzle serves a specific zone of cutting teeth, distributing the jet flow to cover all cutting teeth uniformly without excessive concentration on any single tooth, thereby preventing erosion while ensuring effective cooling and chip removal.
Solution Approach 2:
The nozzle configuration is designed to provide localized cooling and chip removal capabilities tailored to different zones of cutting teeth. The arrangement ensures that cutting teeth in high-rock-cutting-volume zones receive adequate flow while avoiding over-concentration that would cause erosion.
2Reliability
If a nozzle is arranged at the front end of the drill blade to ensure cooling and chip removal for all cutting teeth, then the flow rates are the largest for front end cutting teeth, but the energy utilization rate is low since rock cutting volume and heat generation are smallest at this position
Solution Approach 1:
The nozzle arrangement is designed to match the local cooling and chip removal requirements of different cutting tooth zones. Cutting teeth with higher rock cutting volume and heat generation receive higher flow rates, while those with lower requirements receive proportionally less flow, optimizing energy utilization across the entire drill bit.
Solution Approach 2:
The nozzle configuration creates a dynamic flow distribution pattern where the liquid coolant is directed preferentially to zones of highest need. This dynamic allocation ensures that energy is not wasted on over-cooling front end teeth while adequately serving shoulder teeth that generate more heat.
3Productivity
If the jet flow is concentrated on specific cutting teeth, then the cooling and chip removal effects on those teeth are maximized, but the cutting teeth may suffer from erosion and premature failure
Solution Approach 1:
The concentrated jet flow from a single nozzle is segmented into multiple smaller jets from multiple nozzles. This segmentation distributes the cooling and chip removal effectiveness across all cutting teeth uniformly, preventing any single tooth from experiencing excessive jet flow concentration that would cause erosion and premature failure.
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 sheet-like jet flow ensures effective cooling and chip removal for all cutting teeth, improving the service life and mechanical drilling rate of the drill bit by reducing erosion and repeated crushing, and enhancing energy utilization.
Implementation Method 1
the nozzle outlet is a strip-shaped outlet configured to eject a sheet-like jet flow
Data Source
AI summary
A drill bit nozzle includes a nozzle body, a channel in the nozzle body, and a nozzle outlet arranged at an end of the nozzle body and in communication with the channel. The nozzle outlet is a strip-shaped outlet configured to eject a sheet-like jet flow. Since the nozzle outlet of the drill bit nozzle is a strip-shaped outlet, the nozzle outlet is able to eject a sheet-like jet flow. When the drill bit nozzle is applied to a PDC drill bit, the drill bit nozzle can uniformly eject a drilling fluid onto each cutting tooth, which ensures that the cutting teeth in the drill bit may obtain good cooling and chip removal effects, while avoiding excessive concentration of the jet flow from the drill bit nozzle which may erode the cutting teeth, thereby prolonging the service life of the drill bit.