Helix Oscillating Bit Jet Tool for Clogging-Resistant Drilling
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Solution Overview
Problem
Existing pulsing apparatuses for drilling operations are prone to clogging and are expensive due to the use of diverging diffuser legs, which are also negatively affected by elevated temperatures and contaminants, necessitating a more reliable, long-lived, and economical fluid oscillator for drill or milling bits.
Innovation Solution
A helix oscillating delivery system that creates an erratic helical pulsating stream within a circular cylindrical structure by using multiple separate flow paths with constricted and expanded chambers, eliminating the need for external excitation and moving parts, and featuring a single port for delivering pulsating jets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diverging diffuser legs are used to establish oscillating flow, then fluid oscillation is achieved, but the apparatus becomes expensive and prone to clogging
Solution Approach 1:
The oscillating apparatus is divided into multiple separate flow paths (first and second flow paths) with individual constricted chambers and expansion chambers. Each flow path operates independently to create oscillating flow, eliminating the need for complex diverging diffuser legs while maintaining reliability and resistance to clogging.
2Reliability
If rubber seals are used in Moineau power sections, then sealing is achieved, but the seals are negatively affected by elevated temperatures and pressures
Solution Approach 1:
The patent replaces mechanical rubber seals with a fluidic oscillating system that uses constricted and expanded flow chambers to create oscillating flow. This eliminates the need for rubber seals entirely, allowing the system to operate reliably under elevated temperatures and pressures without seal degradation.
3Productivity
If reciprocating impact elements are used to induce vibration, then drilling efficiency is improved, but the apparatus becomes more complex and expensive
Solution Approach 1:
The fluidic oscillating system is self-generating, using the fluid flow itself to create oscillations through the constricted and expanded chambers. No external power source or complex vibration generation mechanism is required, yet the system still improves drilling rate through the resulting oscillating flow and hammer effect.
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 system generates a strong, erratic helical pulsating flow that enhances drilling efficiency without clogging issues, is cost-effective, and maintains reliability under harsh drilling conditions, improving drilling rates by creating alternating loads on rock formations.
Implementation Method 1
The flow paths are alternatingly constricted and expanded to cause the fluid flowing through the bit jet enhancement tool to pulsate
Implementation Method 2
They exert alternating loads onto the rock formation to produce a water hammer effect and high tensile stress on the formation, which will weaken the formation through the reflection of stress waves
Data Source
AI summary
A bit jet enhancement tool is provided, the tool comprises two or more separate flow paths, each of the flow paths has multiple hollow chambers connected in series; each of the hollow chambers comprises a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber; a separate second expansion chamber connected to the lower end of a plurality of the second constricted chambers; a single port located adjacent to the lower end of the second expansion chamber.