Downhole Wireless Backbone Network Modem Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems in downhole environments face challenges due to noise interference from hydrocarbon production fluids, leading to degraded signal quality and increased round trip times, which diminish network efficiency and throughput.
Innovation Solution
A network management system that dynamically adjusts the number of hops and modem activation based on signal noise levels, using a backbone architecture with clusters and linear portions to optimize communication paths and power management, thereby improving throughput and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a series arrangement of acoustic repeaters is used to ensure communications reach the surface, then communication reliability is improved, but round trip communication times become lengthy, reducing network throughput
Solution Approach 1:
The patent implements dynamic modem selection where the system monitors signal quality indicators and automatically switches between different modem configurations based on real-time acoustic noise conditions. During high noise periods, the system uses fewer, more powerful repeaters; during quiet periods, it uses more repeaters with shorter hop counts, thereby adapting the network topology to maximize throughput while maintaining reliability.
Solution Approach 2:
The system changes operational parameters by selecting different modem combinations based on signal quality metrics. When signal degradation is detected due to acoustic noise, the system transitions to alternative modems with different transmission characteristics, effectively changing the communication parameters to maintain both reliability and throughput under varying conditions.
2Area of stationary object
If more repeaters are deployed to extend communication range, then coverage is improved, but the number of hops increases, lengthening round trip times
Solution Approach 1:
The patent dynamically adjusts the number of active repeaters based on acoustic noise conditions and signal quality. During periods of low acoustic interference, the system activates more repeaters to expand coverage with shorter hop counts. During high noise periods, it reduces the number of active repeaters, accepting reduced coverage but maintaining faster communication for critical paths, thus optimizing the trade-off between coverage and time loss.
3Reliability
If wired communication systems are used to ensure reliable data transmission, then communication reliability is improved, but the system becomes invasive and can interrupt production operations
Solution Approach 1:
The patent replaces the mechanical wireline communication system with an acoustic field-based wireless communication system. Instead of physically inserting cables into the wellbore that mechanically interrupt production, the system uses acoustic waves transmitted through the formation fluids to carry data, eliminating the invasive mechanical interaction while maintaining communication reliability through acoustic signal propagation and repeater networks.
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 enhances communication efficiency and reliability by adapting to noise conditions, reducing the number of hops and modem usage, resulting in faster data transmission and extended battery life, thus improving overall network performance and reducing downtime.
Implementation Method 1
information is exchanged between downhole components and surface systems using acoustic or electromagnetic transmission mediums. As an example, a network of acoustic devices can be deployed downhole that uses the tubing as the medium for transmitting information acoustically.
Data Source
AI summary
A network management system for a wireless communications network adaptively selects wireless modems to use in communicating messages between a control system and downhole equipment. The wireless modems are selected based on a monitored signal to noise ratio. The network management system may be centralized within the network or within a surface control system or can be decentralized so that a plurality of the wireless modems can adaptively determine routing in the network. The network management systems can be used in conjunction with a backbone network architecture to achieve further efficiencies in network throughput.