Fluidic Pulser Vortex Basin for Downhole Telemetry
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Solution Overview
Problem
Current downhole telemetry systems face challenges in effectively transmitting data from downhole sensors to the surface due to signal attenuation and noise in subterranean drilling operations, limiting the bandwidth and reliability of data transmission.
Innovation Solution
The implementation of a fluidic pulser system that generates positive or negative pressure pulses in drilling fluids to transmit data, utilizing vortex basins and fluid flow path selectors to control fluid flow rates and pressures, and incorporating acoustic oscillations to enhance signal detection and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional downhole telemetry systems are used, then data transmission can occur, but signal attenuation and noise limit the bandwidth and reliability
Solution Approach 1:
The patent employs acoustic oscillations (mechanical vibrations) in the fluid flow to encode data signals. The fluidic pulser generates controlled vibrations and pressure waves that propagate through the drilling fluid, allowing data transmission that is more resistant to attenuation and noise compared to conventional electrical or electromagnetic telemetry systems
Solution Approach 2:
The invention uses hydraulic principles by utilizing the drilling fluid itself as the transmission medium. The fluidic pulser modulates the fluid flow to carry information, converting electrical control signals into hydraulic pressure pulses that travel up the drill string, thereby eliminating the need for separate electrical communication channels that are susceptible to noise and attenuation
2Productivity
If signal bandwidth is increased to improve data transmission rate, then productivity improves, but signal detection becomes more difficult in noisy environments
Solution Approach 1:
The fluidic pulser generates periodic acoustic oscillations at specific frequencies to encode data. By using periodic pressure waves with distinct frequency characteristics, the system can transmit data at higher rates while maintaining detectability through frequency-based signal identification that distinguishes transmitted signals from random noise in the drilling environment
Solution Approach 2:
The system modulates multiple parameters of the fluid flow including pressure, frequency, and flow rate to encode information. By varying these physical parameters in controlled patterns, the system achieves high-bandwidth data transmission while each parameter change creates a detectable signal characteristic that can be distinguished from background noise through appropriate sensing and filtering
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
This approach significantly increases data transmission bandwidth and reliability by generating high-frequency pressure pulses and using acoustic oscillations to improve signal detection, even in noisy environments, thereby enhancing the efficiency of downhole telemetry.
Implementation Method 1
utilizing vortex basins and fluid flow path selectors to control fluid flow rates and pressures
Implementation Method 2
incorporating acoustic oscillations to enhance signal detection and clarity
Data Source
AI summary
An example method includes providing fluid communication between an internal bore of a drill string and an annulus between the drill string and a borehole through a fluid channel in a side of a collar coupled to the drill string. Fluid may be circulated through the internal bore of the drill string. A fluid telemetry signal may be generated by selectively generating a vortex within the fluid channel. Providing fluid communication between the internal bore and the annulus through the fluid channel may include providing fluid communication between the internal bore and a vortex basin at least partially defining the fluid channel, through at least one of a first fluid flow path and a second fluid flow path between the vortex basin and the internal bore; and providing fluid communication between the vortex basin and the annulus through a fluid outlet of the vortex basin.