Drilling Carriage Control via Feedback Loop
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Solution Overview
Problem
Existing drilling technologies face inefficiencies and increased wear on drilling tools due to the need for manual adjustment of rotational speed and pressing force, which can vary significantly depending on the ground conditions, leading to suboptimal drilling processes and reduced tool lifespan.
Innovation Solution
A device and method that utilize a control system to adjust the loading force of the drill string on the borehole bottom by controlling the carriage drive based on real-time force measurements, allowing for precise regulation of the drilling process through a control device that sets and maintains a predetermined loading force, reducing wear and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of rotational speed and pressing force is used, then the drilling process can be adapted to ground conditions, but the drilling process becomes inefficient and tool wear increases
Solution Approach 1:
The control device continuously monitors the actual loading force via the sensor and automatically adjusts the carriage position to maintain the predetermined loading force. This closed-loop feedback system eliminates manual adjustment while maintaining adaptability to ground conditions, thereby improving drilling efficiency and reducing tool wear.
Solution Approach 2:
The system automatically regulates its own operation by using the sensor to detect loading force and the control device to adjust the carriage drive accordingly. This self-regulating mechanism eliminates the need for manual intervention while maintaining optimal drilling parameters across varying ground conditions.
2Ease of operation
If manual adjustment of pressing force is used, then the operator can control the drilling process, but tool wear increases and service life decreases
Solution Approach 1:
The sensor provides continuous feedback on the actual loading force to the control device, which automatically adjusts the carriage position to maintain the predetermined loading force. This eliminates manual adjustment and consistently maintains optimal pressing force, thereby reducing tool wear and extending service life while preserving ease of operation through automated control.
3Productivity
If higher pressing force is applied to increase drilling speed, then productivity increases, but tool wear increases
Solution Approach 1:
The system dynamically adjusts the loading force parameter based on ground conditions and drilling depth. By maintaining the loading force at a predetermined optimal value rather than continuously increasing it, the system achieves high productivity while minimizing tool wear. The control device modifies the carriage position to maintain this optimal parameter throughout the drilling process.
Data Source
Figure 1
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Figure 4
AI summary
The device (10) has a support device (12) which is mounted on mast (20). The mast is provided with a carriage (22) in which a rotary drive unit (24) is arranged for rotating a drill string (30). A carriage drive is provided for moving the carriage along the mast. A control device (80) is provided for controlling the carriage drive so as to output the control signal to the carriage drive such that the load force of drill string is adjusted corresponding to predetermined value.