Push-the-bit Rotary Steering Tool Maximum Build Rate Prediction
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Solution Overview
Problem
There is a lack of methods for predicting the maximum build rate of push-the-bit rotary steering tools by combining mechanical mathematical models with measured well inclination data, which is crucial for efficient directional drilling operations.
Innovation Solution
A method that involves selecting a push-the-bit rotary steering device, calculating a theoretical maximum build rate using a mechanical mathematical model, determining a measured maximum build rate based on well inclination data, calculating a correction factor, and adjusting model parameters to predict the maximum build rate for different configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical mathematical model is used to calculate theoretical maximum build rate, then the prediction can be made without field data, but the accuracy is insufficient without calibration against actual measurements
Solution Approach 1:
The patent applies parameter changes by introducing a correction factor that adjusts the theoretical maximum build rate based on the ratio between measured and theoretical values. This transforms the prediction system from using only theoretical parameters to using calibrated parameters that incorporate actual field performance data, thereby improving accuracy without fundamentally changing the underlying mechanical model
Solution Approach 2:
The patent implements feedback by using measured maximum build rate data from actual well operations to calculate a correction factor. This correction factor is then fed back into the prediction system to adjust future predictions, creating a closed-loop system that continuously improves accuracy based on real-world performance validation
2Productivity
If rotary steering tools are used to achieve longer footage and smoother trajectory, then drilling efficiency is improved, but the operational capability must be precisely evaluated through maximum build rate prediction
Solution Approach 1:
The patent applies preliminary action by performing maximum build rate predictions before actual drilling operations begin. The mechanical mathematical model is prepared and calibrated using historical data, enabling engineers to select appropriate rotary steering tools and design wellbore trajectories in advance, ensuring reliable trajectory control while maintaining high drilling efficiency
Solution Approach 2:
The patent replaces purely empirical or experimental methods for evaluating rotary steering tool performance with a mechanical mathematical model. This model uses fundamental mechanical principles to calculate theoretical maximum build rate, reducing reliance on trial-and-error field testing while improving both productivity and reliability of trajectory control
Data Source
AI summary
A method and system for predicting a maximum build rate of a push-the-bit rotary steering tool is provided. In the method, a mechanical mathematical model of a push-the-bit rotary steering device is combined with measured well inclination data of the rotary steering device during actual drilling, a theoretical maximum build rate of a steering tool is calculated by the mechanical mathematical model, and a correction factor is combined with the mechanical mathematical model to predict a maximum build rate of the steering tool during a drilling operation in a same layer of a same block. The method effectively solves the problem of predicting the maximum build rate of the push-the-bit rotary steering device with different parameter changes based on measured data. Therefore, the method and system provide a reliable means for operators to analyze the performance of the push-the-bit rotary steering device, thereby providing technical support for efficient drilling operations.