Drilling Unit Controller Synchronization via Absolute Time Reference
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Solution Overview
Problem
The automation of drilling rig operations is hindered by the high fragmentation of control systems and the lack of time synchronization among independently designed and developed control subsystems, which complicates the coordination of advanced control algorithms and precise actuation in drilling unit operations.
Innovation Solution
A system where multiple drilling unit apparatus are controlled by corresponding controllers that communicate with sensors and each other using time reference signals, allowing for synchronized operation based on absolute time references, such as GPS or IEEE protocol 1588, to ensure precise timing and coordination of control sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independently designed control subsystems are used for drilling unit apparatus, then each subsystem can be optimized for its specific function, but time synchronization and coordination between subsystems deteriorates
Solution Approach 1:
The patent introduces a central controller as an intermediary that receives time reference signals and distributes synchronized timing information to all independent control subsystems. This mediator enables each subsystem to maintain its functional independence while achieving precise time coordination through the central timing distribution mechanism.
Solution Approach 2:
The patent implements a universal time reference signal distribution system that serves all different types of control subsystems simultaneously. The central controller provides a common timing framework that can coordinate diverse apparatus including drill string rotation, drilling fluid pumping, and wellbore monitoring systems, enabling multi-functional synchronization.
2Device complexity
If control systems are highly fragmented into independent subsystems, then system complexity and ease of maintenance improve, but coordination and synchronization of control sequences deteriorates
Solution Approach 1:
The central controller acts as a mediator that simplifies the coordination operation between fragmented subsystems. By receiving time reference signals and distributing synchronized commands, it enables easy coordination of control sequences without requiring complex inter-subsystem communication protocols.
Solution Approach 2:
The system implements feedback mechanisms where control subsystems report their operational status and timing information back to the central controller. This feedback loop enables the central controller to adjust and synchronize control sequences across all subsystems, maintaining coordinated operation despite modular fragmentation.
3Measurement precision
If absolute time reference signals are implemented across all controllers, then synchronization precision improves, but system complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical synchronization mechanisms with electronic time reference signal transmission. By using GPS or other atomic clock-based time references transmitted as electrical signals to the central controller and subsequently to all subsystems, it achieves high precision synchronization without the complexity of mechanical coupling or coordination mechanisms.
Data Source
AI summary
A system for controlling drilling unit apparatus includes a plurality of drilling unit apparatus each operated by a corresponding controller. Any one or more of the controllers is in signal communication with either or both of (i) at least one sensor that generates a signal related to an operating condition of the drilling unit apparatus and (ii) at least one other of the controllers to accept as input therefrom a signal related to an operating state of the corresponding drilling unit apparatus. A plurality of time reference signal receivers is each in signal communication with a corresponding controller. An absolute time reference signal transmitter is in signal communication with each time reference signal receiver such that any one or more of the controllers operates its respective drilling apparatus in response to either or both of (i) the sensor signal and (ii) the signal from the at least one other controller.