Curved Drill Bit Nozzle for Cutting Removal
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Solution Overview
Problem
High angle nozzles are difficult to incorporate into machined drill bits, such as steel bits, due to manufacturing constraints, leading to inefficiencies in cutting removal during drilling operations.
Innovation Solution
A curved nozzle design with a cylindrical base, neck, and a fluid pathway that includes a transition zone, throat, and a curved tip to deflect fluid flow, allowing for secure mounting and efficient cutting removal by directing fluid spray along the cutting surfaces of the drill bit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high angle nozzles are incorporated into machined drill bits, then cutting removal efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The nozzle is designed with a curved body and curved outlet instead of straight cylindrical geometry. This curvature allows the nozzle to be manufactured as a single integrated component using conventional machining processes, while still achieving the high angle fluid deflection needed for effective cutting removal. The curved shape redirects drilling fluid at optimal angles along the cutting surfaces without requiring complex assembly.
Solution Approach 2:
The nozzle design integrates multiple functions into a single component: fluid delivery, flow direction control, and cutting surface engagement. By combining these functions into one curved nozzle body rather than using separate components, the design achieves high cutting removal efficiency while maintaining manufacturing feasibility through conventional single-piece machining processes.
2Ease of manufacture
If conventional straight nozzles are used, then manufacturing is simplified, but cutting removal efficiency deteriorates
Solution Approach 1:
The curved nozzle geometry is specifically designed to redirect drilling fluid at high angles along the cutting surfaces of the drill bit. This curvature enables the fluid jet to effectively engage with cuttings and rock debris, significantly improving cutting removal efficiency compared to straight nozzles, while still being manufacturable as a single piece using conventional processes.
Solution Approach 2:
The nozzle features a curved outlet section specifically positioned to direct fluid flow along the cutting surfaces where it is most needed for cutting removal. This localized curvature at the outlet provides enhanced cutting removal efficiency in the critical zone without complicating the overall manufacturing process, as the curved shape can be achieved in a single machining operation.
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 curved nozzle design enhances cutting removal efficiency by directing fluid spray away from the axis of the drill bit, effectively guiding cuttings along junk slots and improving drilling performance.
Implementation Method 1
a curved tip to deflect fluid flow, allowing for secure mounting and efficient cutting removal by directing fluid spray along the cutting surfaces of the drill bit
Data Source
AI summary
A curved nozzle for use in a drill bit is disclosed. The curved nozzle includes a flow path that directs drilling fluid towards the face of cutters. The curved nozzle may include a base, neck, and a tip. Flow entering the nozzle, travels along a flow path through the nozzle and out the tip. The flow path may be reduced as it passes through the nozzle. The flow is curved as it flows through the neck and out the tip. The nozzle includes cooperating interior surfaces that guide the flow. The upper interior surface may include two curved zones. The first zone will be a substantially constant radius of curvature. The second zone, extending from the first zone, may be straight.