Automated Wellbore Ranging for Consistent Parallel BHA Steering
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Solution Overview
Problem
Conventional drilling of multiple parallel wellbores requires manual steering by separate operators, leading to suboptimal communication and coordination, resulting in excessive variation in wellbore separation and position.
Innovation Solution
Implementing automatic control of follower BHAs, allowing a single operator to steer a leader BHA, with follower BHAs operating automatically to maintain a predetermined offset and direction relative to the leader, using ranging transmitters and receivers to communicate and adjust paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual steering by separate operators is used for multiple parallel wellbores, then each wellbore can be steered independently, but communication and coordination between operators is suboptimal resulting in excessive variation in wellbore separation
Solution Approach 1:
The patent replaces manual mechanical steering control with an automated electromagnetic ranging system. Follower BHAs use ranging receivers to detect the position of the leader BHA's beacon, automatically calculating offset and direction without human operators. This substitution of mechanical manual control with automated electromagnetic field-based positioning eliminates coordination issues between multiple operators while maintaining independent wellbore steering capability.
Solution Approach 2:
The follower BHAs autonomously determine their own position relative to the leader BHA using the ranging system, and automatically adjust their drilling path to maintain the desired offset. The system enables self-steering without requiring continuous human intervention or coordination between multiple operators, thereby improving wellbore separation consistency while reducing operational complexity.
2Productivity
If automatic control of follower BHAs is implemented, then drilling precision and efficiency are enhanced, but the system complexity increases with ranging transmitters and receivers
Solution Approach 1:
The ranging beacon and receiver system serves multiple functions: it provides real-time position detection, calculates offset and direction, and enables automatic steering control. By making the ranging system multi-functional, the patent reduces the need for separate dedicated components for each function, thereby enhancing drilling efficiency while controlling the increase in overall system complexity.
Solution Approach 2:
The system continuously monitors the position of the follower BHA relative to the leader BHA through electromagnetic ranging signals and automatically adjusts the drilling path based on this feedback. This closed-loop feedback mechanism improves drilling precision and efficiency while the automated nature of the feedback control reduces the need for complex manual coordination systems.
3Ease of operation
If a single operator steers the leader BHA while follower BHAs operate automatically, then the number of operators is minimized, but the automation system requires sophisticated ranging and control capabilities
Solution Approach 1:
The patent replaces complex manual coordination between multiple operators with an automated electromagnetic ranging and control system. The follower BHAs automatically receive positioning data from the leader BHA's beacon, calculate their required offset and direction, and steer themselves without human intervention. This substitution reduces the number of operators from multiple to one while the automation capability handles the sophisticated ranging and control functions.
Solution Approach 2:
The electromagnetic ranging system acts as an intermediary between the leader and follower BHAs, automatically transmitting positioning information and enabling automatic steering. This intermediary system eliminates the need for direct human communication and coordination between operators, reducing the number of operators required while the automated intermediary handles the sophisticated control capabilities.
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
Reduces variation in wellbore placement and minimizes the number of operators required, enhancing drilling precision and efficiency by automating the steering process.
Implementation Method 1
A ranging receiver of the second BHA measures a distance and a direction of a lead BHA relative to the second BHA
Data Source
AI summary
Systems and methods for drilling a first borehole along a planned first path using a first bottom hole assembly (BHA) while drilling a second borehole using a second BHA along a second path having a defined spatial relationship to the first path. The method includes steps of measuring a distance and a direction of the first BHA relative to the second BHA, automatically adjusting the second path based in part on the measured distance and the measured direction so as to maintain the spatial relationship, and automatically steering the second BHA to follow the adjusted second path.