Telemetry Signal Separation Using Multi-Position Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drilling fluid telemetry systems face challenges in effectively removing noise from surface sources, such as mud pump noise, which degrades the quality of uplink telemetry signals and makes it difficult to recover transmitted information.
Innovation Solution
A method and system that measure signals at multiple spaced positions in response to both noise and message sources, estimate a separation matrix, and use this matrix to estimate the message signal, effectively separating the signal from noise sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surface sensors measure signals in response to mud pump operation, then telemetry data can be collected, but mud pump noise degrades signal quality and makes detection difficult
Solution Approach 1:
The patent segments the signal processing by separating the mud pump noise signal from the telemetry signal through multiple sensors positioned at different locations. By measuring signals at multiple positions and processing them through a separation matrix, the system isolates the harmful noise component from the useful telemetry data, enabling accurate detection despite the noisy environment.
Solution Approach 2:
The patent introduces an intermediary signal processing system that includes multiple surface sensors and a separation matrix algorithm. This intermediary layer between the mud pump noise source and the final signal detection acts as a mediator that filters and separates the overlapping signals, allowing the telemetry information to be extracted from the noisy mud stream signals.
2Measurement precision
If noise removal techniques are applied to improve signal quality, then detection accuracy improves, but system complexity increases
Solution Approach 1:
The signal processing is segmented into distinct computational steps: measuring signals at multiple positions, estimating the separation matrix from the measured signals, and applying the separation matrix to extract the telemetry signal. This segmentation of the processing task makes the complex noise removal problem more manageable and implementable through systematic signal processing operations.
Data Source
AI summary
The disclosure is directed to method and apparatus for communication through a fluid. The method includes measuring signals in the fluid at at least two spaced apart positions; estimating a subset of a separation matrix; and using the estimated subset and the signals to estimate a signal sent by the message source. The apparatus may include a message source on a bottom hole assembly; sensors disposed at least two spaced apart locations; and at least one processor configured to: estimate a subset of a separation matrix based on the signals and use the subset to estimate a message signal set by the message source.