Wellbore Activity Schedule Adjustment for Tripping Speed Control
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Solution Overview
Problem
Wellbore drilling operations face challenges in optimizing the speed of drill string movement due to hydrostatic pressure changes and shock/vibration, which can lead to pressure control emergencies and equipment failure, and there is a need for improved operational guidance and performance evaluation.
Innovation Solution
A method that involves entering a well plan into a computer, measuring progress, recalculating activity times, and displaying recalculated start and stop times to guide drilling crews, while also collecting and comparing tripping data to benchmark performance, using sensors to monitor speed, pressure, and vibration, and providing alerts for safe operating ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drill string is moved quickly into the wellbore to improve drilling productivity, then tripping speed increases, but hydrostatic pressure increases excessively causing surge pressure that may exceed fracture pressure of exposed formations
Solution Approach 1:
The system calculates and determines maximum allowable tripping speeds before tripping operations begin, establishing speed limits that prevent surge pressure from exceeding formation fracture pressure. This preliminary determination of safe operating parameters prevents the harmful effect before it occurs.
Solution Approach 2:
The system dynamically adjusts tripping speed recommendations based on real-time wellbore conditions, drill string configuration, and formation characteristics. The maximum allowable speed is not fixed but adapts to changing conditions, allowing optimized tripping rates that maintain safety margins while maximizing productivity.
2Productivity
If the drill string is moved quickly out of the wellbore to improve drilling productivity, then tripping speed increases, but hydrostatic pressure decreases excessively causing swab pressure that may fall below formation fluid pressure
Solution Approach 1:
The system calculates minimum allowable tripping speeds before tripping operations begin, establishing speed floors that prevent swab pressure from falling below formation fluid pressure. This preliminary determination of safe operating parameters prevents the harmful effect before it occurs.
Solution Approach 2:
The system dynamically adjusts tripping speed recommendations based on real-time wellbore conditions, drill string configuration, and formation characteristics. The minimum allowable speed adapts to changing conditions, allowing optimized tripping rates that maintain safety margins while maximizing productivity.
3Productivity
If the drill string is moved at high speed to improve drilling productivity, then tripping speed increases, but shock and vibration exceed limits making drill string components susceptible to failure
Solution Approach 1:
The system calculates maximum allowable tripping speeds based on drill string component strength and vibration characteristics before tripping operations begin. This preliminary determination establishes speed limits that prevent shock and vibration from reaching levels that would cause component failure.
Solution Approach 2:
The system dynamically adjusts tripping speed recommendations based on real-time drill string configuration, component characteristics, and vibration monitoring. The maximum allowable speed adapts to changing conditions, allowing optimized tripping rates that maintain component integrity while maximizing productivity.
4Measurement precision
If detailed monitoring and schedule recalculation systems are implemented to improve operational safety and efficiency, then measurement precision and control improve, but device complexity increases
Solution Approach 1:
The system automatically determines maximum allowable tripping speeds, calculates schedule adjustments, and provides recommendations without requiring complex manual calculations or external expertise. The well control system serves itself by integrating all necessary calculations and decision-support functions into a unified automated platform.
Solution Approach 2:
The system performs multiple functions including tripping speed calculation, schedule recalculation, progress tracking, and recommendation generation within a single integrated platform. This multi-functionality reduces the need for separate specialized systems and simplifies the overall device complexity while maintaining high measurement precision and control capabilities.
Data Source
AI summary
A method can include determining an ideal activity speed profile of an activity for a well, where the ideal activity speed profile of the activity for the well corresponds to a length of the well; forecasting a start time and a stop time using the ideal activity speed profile of the activity; generating a drilling plan using the start time and the stop time where another activity commences after the stop time; during performance of the activity for the well, receiving data indicative of an actual activity speed of the activity for the well for a corresponding length of the well; during the performance of the activity, deciding to make an adjustment to the performance of the activity for the well using the ideal activity speed profile and the actual activity speed of the activity for the well; and adjusting the stop time of the drilling plan.