Drilling Parameter Optimization for Stick-Slip Vibration Mitigation
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Solution Overview
Problem
Current drilling technologies face challenges in effectively managing stick-slip vibrations during wellbore drilling, leading to reduced Rate of Penetration (ROP), increased tool wear, and operational inefficiencies, as existing methods require detailed drill string design data and specialized software for real-time monitoring and adjustment.
Innovation Solution
A method for drilling wellbores that involves identifying torsional vibration intervals, calculating Torque Swing Ratio values, determining a Stick-Slip Design Factor, and adjusting drilling parameters such as rotary speed and weight on bit to maintain optimal conditions, using a system that monitors and compares these parameters to reference values for real-time adjustments without requiring detailed drill string design data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If real-time monitoring and adjustment of drilling parameters is implemented to manage stick-slip vibrations, then drilling efficiency and ROP are improved, but device complexity and operational complexity increase due to requiring detailed drill string design data and specialized software
Solution Approach 1:
The system enables self-service by allowing the drilling operation to automatically monitor and adjust its own parameters. The method calculates Torque Swing Ratio values from operational data and compares them against reference values to determine Stick-Slip Design Factors, enabling the system to self-regulate drilling parameters without requiring external specialized software or detailed drill string design data
Solution Approach 2:
The patent replaces complex mechanical monitoring systems and specialized software with a simplified computational approach. Instead of using detailed drill string design data and complex vibration analysis software, the method uses Torque Swing Ratio calculations based on operational parameters (torque, weight on bit, rotary speed) that can be computed and processed with standard equipment
2Measurement precision
If complex data entry and specialized software are used for monitoring stick-slip vibrations, then measurement precision and control accuracy are improved, but ease of operation deteriorates
Solution Approach 1:
The method achieves universality by creating a monitoring system that works with standard drilling operational data already collected during normal operations. The Torque Swing Ratio calculation uses universally available parameters (torque, weight on bit, rotary speed) from any drilling operation, eliminating the need for specialized sensors, detailed drill string design data, or proprietary software while maintaining measurement precision
Solution Approach 2:
The patent transforms complex vibration analysis into a simplified parameter-based approach. By changing the monitoring focus from detailed vibrational characteristics to Torque Swing Ratio values derived from operational parameters, the system maintains measurement accuracy while dramatically improving ease of operation through standard data collection and calculation methods
3Reliability
If detailed drill string design data is collected and analyzed, then reliability of vibration management is improved, but loss of time for data collection and processing increases
Solution Approach 1:
The method applies preliminary action by establishing reference Torque Swing Ratio values and Stick-Slip Design Factor thresholds before drilling operations begin. These reference values are calculated based on drill string characteristics and drilling conditions, allowing real-time monitoring to simply compare current Torque Swing Ratio values against pre-established thresholds, eliminating the need for complex real-time data collection and analysis while maintaining reliability
Solution Approach 2:
The patent extracts the essential vibration management function from complex data analysis by focusing solely on Torque Swing Ratio calculations from operational parameters. This extraction removes the need for detailed drill string design data collection and complex processing, keeping only the critical calculation and comparison functions that provide reliable vibration management with minimal data processing time
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for improved management of stick-slip vibrations, enhancing drilling efficiency by reducing torsional vibrations and maintaining optimal drilling parameters, thereby increasing ROP and extending tool life without the need for complex data entry or specialized software.
Implementation Method 1
a drill bit attached to the drill string and configured to penetrate a subsurface formation to form a wellbore
Implementation Method 2
identifying a first interval having torsional vibration within a wellbore; determining Torque Swing Ratio values for the drilling parameters
Implementation Method 3
managing a drilling operation for a second interval based on the drilling parameter threshold and a comparison of the determined Torque Swing Ratio values for the second interval with the Torque Swing Ratio reference value
Data Source
AI summary
The present disclosure relates generally to the field of drilling operations. More particularly, the present disclosure relates to methods for drilling wells utilizing drilling equipment, more particularly drill string assemblies, and making adjustments to drilling parameters during the drilling operation based on analysis of the drilling data. Included are methods for the selection of modified drilling parameters to mitigate torsional vibration dysfunction.