EM Telemetry Link Connectivity Testing via Switched Signal Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic (EM) telemetry systems in subsurface drilling face challenges in reliably testing and diagnosing connectivity issues between ground conductors and signal receivers, leading to inefficiencies and potential safety risks due to manual inspection requirements and hidden defects in links and connections.
Innovation Solution
A system and method for testing connectivity in EM telemetry systems, involving a test signal generator, switches, and a controller to selectively connect links to either the signal receiver or the test signal generator, allowing for the measurement of current flow through links to assess connectivity, with features like distinct test signal frequencies and voltages, and display of results for operator feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspection methods are used to test connectivity in EM telemetry systems, then device complexity is reduced, but reliability and productivity deteriorate due to inefficiency and hidden defects
Solution Approach 1:
The testing system automatically performs connectivity diagnostics without requiring manual inspection. The controller autonomously controls the switch to connect the link to the test signal generator, generates test signals, measures current flow, and identifies connectivity problems, eliminating the need for manual intervention while maintaining system reliability.
Solution Approach 2:
The patent replaces manual mechanical inspection with an automated electrical testing system. The test signal generator sends electrical signals through the link, and the controller measures current flow to detect connectivity issues, substituting human operators with an automated electromechanical system that provides more reliable and consistent results.
2Productivity
If automated testing systems are implemented, then productivity and reliability improve, but device complexity increases
Solution Approach 1:
The testing system is designed to be integrated with existing EM telemetry systems, serving multiple functions: it can test connectivity, identify defects, and provide diagnostic information about links and ground conductors. The universal design allows the same system to handle various testing scenarios without requiring separate specialized equipment for each function.
Solution Approach 2:
The controller acts as an intermediary between the test signal generator and the link being tested. It manages the switching connections, coordinates signal generation, measures current flow, and processes results, thereby simplifying the overall system architecture by centralizing control functions rather than requiring direct complex interconnections between all components.
3Ease of operation
If manual inspection is performed, then ease of operation is maintained, but loss of time increases due to inefficiency and downtime
Solution Approach 1:
The automated testing system operates continuously without interruption to drilling operations. The controller can initiate connectivity tests at any time, and the system automatically completes the entire testing sequence including signal generation, current measurement, and defect identification, eliminating the time losses associated with manual inspection and system setup.
Solution Approach 2:
The system provides immediate feedback about link connectivity status through current flow measurements. The controller analyzes the measured current to determine whether the link is functional or defective, providing real-time diagnostic information that eliminates the need for time-consuming manual inspection and allows for rapid identification and correction of connectivity problems.
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
Automates the testing of links and ground conductors, reducing manual effort, enhancing safety, and quickly identifying connectivity problems, thereby improving the reliability of EM telemetry signal transmission and reducing downtime in drilling operations.
Implementation Method 1
A test signal generator is supplied to the ground conductors through the links. A controller causes a switch to disconnect the link from the signal receiver and connect the link to the test signal generator. The controller tests a ground conductor and the corresponding link by causing the test signal generator to generate an electrical test signal and supply it to the ground conductor through the link.
Implementation Method 2
A meter measures a current flowing through the link while the electrical test signal is being supplied to determine whether the ground conductor and the corresponding link are operating properly.
Data Source
AI summary
Methods and systems for testing connectivity in an EM telemetry system for transmission of a ground originating uplink EM telemetry signal. The methods and systems comprise a switch coupled to the link and configured to selectively connect the link to a test signal generator or a signal receiver, the test signal generator configured to generate a test signal and to supply it to a ground conductor, and the current within the link is measured to determine whether the link and ground conductor can properly transmit the ground originating uplink EM telemetry signal.