Wellbore Trajectory Control Using Minimum-Energy Correction Paths
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Solution Overview
Problem
Conventional wellbore trajectory control methods, such as PID controllers, face challenges in maintaining smooth control signals due to changing down-hole operation conditions, leading to difficulties in correcting deviations from planned trajectories during drilling operations.
Innovation Solution
A system and method that modifies the conventional PID controller to implement a minimum wellbore energy method for automated downhole wellbore trajectory control, using real-time data from measurement while drilling and logging while drilling tools to determine correction paths with minimum incremental wellbore energy, allowing for precise adjustment of the drill path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional PID controllers are used for wellbore trajectory control, then the control system is simple to implement, but the control signal becomes unstable and fluctuates under changing down-hole conditions
Solution Approach 1:
The patent implements a dynamic control system that continuously adapts to changing down-hole conditions by using real-time wellbore data to adjust control parameters. The system transitions from static PID coefficients to dynamic parameter adjustment based on actual drilling conditions, making the controller responsive to environmental changes while maintaining stability.
Solution Approach 2:
The patent employs feedback mechanisms by continuously monitoring actual wellbore trajectory deviations and using this information to adjust control signals. The system incorporates real-time feedback from down-hole measurements to correct trajectory errors, creating a closed-loop control system that maintains stability under varying conditions.
2Manufacturing precision
If real-time trajectory correction is performed using minimum incremental wellbore energy method, then the alignment with planned paths improves, but the computational complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating optimal correction paths using the minimum incremental wellbore energy method before actual drilling deviations occur. The system prepares correction strategies in advance based on the planned trajectory and potential deviation scenarios, reducing real-time computational burden while maintaining high precision.
Solution Approach 2:
The patent replaces complex mechanical trial-and-error adjustment methods with computational optimization algorithms. By using mathematical models to calculate minimum energy correction paths, the system achieves high trajectory precision without relying on iterative mechanical adjustments, thereby managing computational complexity through efficient algorithm design.
3Productivity
If automated downhole wellbore trajectory control is implemented, then the efficiency of deviation correction improves, but the system complexity increases
Solution Approach 1:
The patent implements self-service automation where the control system automatically detects trajectory deviations, calculates correction parameters, and adjusts drilling direction without human intervention. The system monitors its own performance and makes autonomous corrections, improving efficiency by eliminating manual intervention while managing complexity through integrated automated functions.
Data Source
AI summary
The disclosed embodiments include a method, apparatus, and computer program product configured to performing automated downhole wellbore trajectory control for correcting between an actual wellbore trajectory path and a planned wellbore trajectory path. For example, in one embodiment, a PID controller is configured to obtain real-time data gathered during the drilling operation, determine whether the actual wellbore trajectory path deviates from the planned wellbore trajectory path, and automatically initiate the downhole wellbore trajectory control to change the actual wellbore trajectory path to a modified correction path that is determined using a minimum incremental wellbore energy method.