Electromagnetic Telemetry Relay Nodes for Deep Drilling Signal Integrity
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Solution Overview
Problem
As drilling operations progress, the Euclidean distance between downhole transmitters and surface-based electronic devices increases, leading to data loss or failure in receiving transmitted signals, which hampers effective monitoring of drilling operations.
Innovation Solution
An electromagnetic telemetry system comprising a downhole transmitter and remote nodes that dynamically adjust their operational modes based on signal strength, with the drilling data acquisition system requesting nodes to operate in acquisition or survey modes to optimize signal reception and processing, thereby improving signal quality and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the Euclidian distance between transmitters and surface-based electronic device increases, then the drilling operation can reach deeper hydrocarbon resources, but data transmission reliability deteriorates and data is lost
Solution Approach 1:
The patent divides the single long-distance transmission path into multiple shorter transmission segments by deploying intermediate remote nodes at strategic locations. Each node acts as a relay, breaking the direct line-of-sight transmission path into manageable segments that maintain signal integrity over greater total distances.
Solution Approach 2:
Remote nodes serve as intermediary devices between the downhole transmitter and surface-based electronic device. These intermediaries receive, process, and forward signals, enabling reliable communication over extended distances by preventing direct signal degradation that would occur in a single long-distance transmission.
2Loss of information
If remote nodes continuously acquire and transmit drilling data, then data completeness improves, but energy consumption and system complexity increase
Solution Approach 1:
The system dynamically adjusts the operational mode of each remote node based on real-time signal strength measurements and drilling operation status. Nodes switch between acquisition mode (continuous monitoring), survey mode (periodic reporting), and standby mode, optimizing the balance between data completeness and system complexity.
Solution Approach 2:
The drilling data acquisition system receives feedback regarding signal strength from remote nodes and uses this information to dynamically determine and adjust which nodes operate in acquisition mode versus survey mode. This feedback mechanism enables adaptive resource allocation that maintains data completeness while managing system complexity.
3Reliability
If multiple remote nodes operate in acquisition mode simultaneously, then data redundancy and reliability improve, but energy consumption and processing requirements increase
Solution Approach 1:
The system employs partial action by having only the necessary number of remote nodes operate in acquisition mode at any given time, rather than all nodes continuously acquiring data. This selective approach provides sufficient data redundancy for reliability while avoiding the excessive energy consumption that would result from all nodes operating simultaneously.
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 enhances the reliability and quality of downhole signal transmission, ensuring continuous data acquisition and monitoring of drilling operations even at greater distances, by strategically managing remote node operations based on signal strength and noise levels.
Implementation Method 1
electromagnetic telemetry system, downhole transmitter configured to engage in electromagnetic telemetry operations
Data Source
AI summary
Electromagnetic telemetry systems, methods to obtain downhole signals indicative of a drilling operation, and drilling data acquisition systems are presented. An electromagnetic telemetry system includes a downhole transmitter configured to transmit signals indicative of whether the downhole transmitter is in a transmission mode to transmit drilling data, a drilling data acquisition system configured to receive the signals indicative of whether the downhole transmitter is in the transmission mode, and one or more remote nodes disposed around the hydrocarbon wellsite. Each respective remote node of the one or more remote nodes configured to operate in a first mode to periodically transmit data indicative of the signal strength to the drilling data acquisition system. Each respective remote node is also configured to operate in a second mode to acquire drilling data from the downhole transmitter, and wirelessly transmit the drilling data to the drilling data acquisition system.