Automated Drilling Index Combining ROP and MSE
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Solution Overview
Problem
Current automated drilling systems for boreholes lack an efficient method to optimize both rate of penetration (ROP) and mechanical specific energy (MSE) simultaneously, leading to suboptimal drilling performance.
Innovation Solution
A method and apparatus that monitor and adjust drilling control variables based on a combined automated drilling index, which incorporates both ROP and MSE indices, allowing for real-time optimization of drilling parameters to maximize or minimize the index accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated drilling systems optimize only ROP or only MSE separately, then one parameter is improved, but the other parameter remains suboptimal
Solution Approach 1:
The patent combines ROP and MSE into a single composite drilling performance index that integrates both parameters. This merging allows the automated drilling system to simultaneously optimize both ROP and MSE by controlling drilling parameters based on the composite index rather than optimizing them separately, thereby resolving the contradiction between improving one parameter while the other remains suboptimal
Solution Approach 2:
The system dynamically adjusts drilling parameters (weight on bit, rotational speed, feed rate) based on real-time monitoring of the composite drilling performance index. By changing these parameters in response to the combined ROP-MSE index, the system achieves simultaneous optimization of both rate of penetration and mechanical specific energy, rather than treating them as separate optimization targets
2Productivity
If multiple drilling parameters are monitored and adjusted in real-time to optimize both ROP and MSE, then drilling performance is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple drilling parameters (ROP and MSE) into a single composite index, which simplifies the control architecture. Instead of requiring separate control loops for each parameter, the system uses one integrated index to guide parameter adjustments, thereby improving drilling performance while avoiding proportional increases in system complexity
Solution Approach 2:
The composite drilling performance index acts as an intermediary between the multiple drilling parameters and the control system. This intermediary consolidates the information from ROP and MSE measurements into a single signal that drives parameter adjustments, reducing the complexity of real-time monitoring and control while maintaining optimization of both parameters
Data Source
AI summary
A method for automated drilling of a borehole in a subsurface formation includes drilling the borehole using a set of drilling control variables assigned a set of values. An automated drilling index of the drilling is monitored. The automated drilling index of the drilling is a combination of a first index that depends on a rate of penetration of the drilling and a second index that depends on a mechanical specific energy of the drilling. The values assigned to the set of drilling control variables are selectively adjusted at least once during the drilling based on the monitoring of the automated drilling index.