Automated BHA Steering via Trend Reversal Detection
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Solution Overview
Problem
Conventional directional drilling methods lack efficient and accurate control over the bottom hole assembly (BHA) orientation, leading to complex and labor-intensive adjustments to correct deviations from the planned drilling path, especially during transitions between sliding and rotating operations.
Innovation Solution
A method and system that utilize real-time data feedback to calculate and generate drilling rig control signals for steering the BHA along a modified drilling path, which can intersect or diverge from the planned path based on deviation thresholds, optimizing the drilling path through 3D curve calculations and zone definitions to maintain alignment with the target location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If real-time data feedback and automated control signals are implemented, then BHA responsiveness and directional control accuracy are improved, but device complexity and initial system requirements increase
Solution Approach 1:
The system continuously monitors drilling parameters including inclination, azimuth, and toolface orientation, comparing real-time BHA position against the planned drilling path. When deviations exceed predetermined thresholds, the system automatically generates correction signals to adjust the BHA orientation, creating a closed-loop feedback control system that maintains drilling accuracy without requiring constant manual intervention
Solution Approach 2:
The control system is designed to automatically detect deviations and generate correction signals without requiring continuous manual input from the operator. The system self-regulates by processing real-time survey data, calculating required corrections, and outputting control signals to adjust the BHA orientation, thereby reducing manual labor while maintaining precision
2Productivity
If manual adjustments are used to correct deviations, then device complexity remains low, but productivity and operational efficiency decrease
Solution Approach 1:
The system provides real-time feedback on drilling position deviations through automated comparison of survey data with the planned path, allowing the operator to understand the current state without manually calculating corrections. This feedback mechanism enables faster response to deviations while reducing the operational burden on the operator
Solution Approach 2:
The system replaces manual mechanical adjustment processes with automated electronic control signals. Instead of requiring the operator to manually calculate and execute corrections through mechanical operations, the system uses computer-generated signals to automatically adjust the BHA orientation, thereby increasing productivity while simplifying the operator's task
3Measurement precision
If frequent manual surveys and adjustments are performed, then measurement precision is maintained, but loss of time and operational duration increase
Solution Approach 1:
The system enables continuous monitoring of drilling parameters through real-time survey data processing, eliminating the need to stop drilling for manual survey measurements and adjustments. The continuous feedback loop allows the drilling operation to proceed without interruption while maintaining precise control of the BHA position through automated detection and correction of deviations
Data Source
AI summary
A system and method of directionally steering a bottom hole assembly (“BHA”) by receiving data indicative of a directional trend of the BHA and a projection to bit depth; determining a location of the BHA based on the received data; comparing the location of the BHA to a planned drilling path to identify an amount of deviation; automatically creating a modified drilling path based on the amount of deviation and a predicted trend of a downhole parameter; detecting a trend of the downhole parameter while drilling along the modified drilling path; and automatically creating a further modified drilling path when the trend of the downhole parameter is a reversal of the predicted trend of the downhole parameter. The predicted trend of the downhole parameter is an increase of a d-exponent factor or a d-exponent-corrected factor with an increase in depth.