Additive Manufacturing Flow Control for Drill Bit Vibration
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Solution Overview
Problem
Existing earth-boring tools face challenges in controlling rate of penetration and drill bit vibrations when transitioning from soft to hard formations, leading to excessive fluctuations and vibrations, which affect drill bit longevity and borehole consistency.
Innovation Solution
Incorporating an additive manufacturing formed flow control device within the actuation system of the drill bit, which controls the flowrate of hydraulic fluid to manage the movement of drilling elements, optimizing extension and retraction rates to mitigate these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rate of penetration is increased when drilling from soft to hard formations, then drilling efficiency is improved, but drill bit vibrations and fluctuations increase excessively
Solution Approach 1:
The drill bit incorporates movable cutting elements that can dynamically adjust their position between extended and retracted states. This dynamic adjustment allows the drill bit to adapt to varying formation hardness, maintaining optimal rate of penetration while reducing vibrations when transitioning from soft to hard formations
Solution Approach 2:
The system changes the operational parameters of the cutting elements by controlling their extension and retraction. By adjusting the position parameter of cutting elements in response to formation conditions, the system optimizes drilling efficiency while minimizing harmful vibrations during formation transitions
2Productivity
If the depth of cut is increased to improve drilling efficiency, then productivity is improved, but drill bit aggressiveness increases causing excessive vibrations and stick-slip
Solution Approach 1:
The cutting elements are designed to move dynamically between extended and retracted positions, allowing the depth of cut to be adjusted in real-time. This dynamic control prevents excessive drill bit aggressiveness that would otherwise cause stick-slip vibrations, while still maintaining high drilling efficiency
Solution Approach 2:
The drill bit system automatically adjusts the position of cutting elements based on encountered formation conditions without requiring continuous surface intervention. This self-adjusting mechanism optimizes depth of cut to maintain productivity while preventing harmful vibrations and stick-slip phenomena
3Device complexity
If the drill bit is designed with fixed cutters for simplicity, then device complexity is reduced, but the ability to adapt to varying formations is limited
Solution Approach 1:
Rather than using fixed cutters, the drill bit employs movable cutting elements that can change position dynamically. This dynamic design increases adaptability to varying formations while maintaining reasonable device complexity through the use of hydraulic actuation systems
4Speed
If the movable component moves quickly to improve response time, then adaptability to formation changes is improved, but vibrations are increased
Solution Approach 1:
The hydraulic system controls the movement of cutting elements through regulated flow rates, creating a controlled periodic action rather than abrupt movements. This approach allows the cutting elements to respond to formation changes while minimizing the generation of lateral and torsional vibrations through smooth, controlled motion
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
The solution effectively stabilizes drill bit performance by controlling flowrates through complex flow passages, reducing vibrations and extending drill bit life while maintaining borehole consistency across varying formations.
Implementation Method 1
an additive manufacturing formed flow control device within the actuation system of the drill bit, which controls the flowrate of hydraulic fluid to manage the movement of drilling elements
Implementation Method 2
The solution effectively stabilizes drill bit performance by controlling flowrates through complex flow passages, reducing vibrations and extending drill bit life
Data Source
AI summary
An earth-boring tool includes a movable component and an additive manufacturing formed flow control device in fluid communication with the movable component and configured to control a flowrate of the hydraulic fluid through the additive manufacturing formed flow control device, wherein the additive manufacturing formed flow control device is configured to control a movement of the movable component via the flowrate of hydraulic fluid through the additive manufacturing formed flow control device. An earth-boring tool includes an additive manufacturing formed flow control device in fluid communication with one or more components of the earth-boring tool and configured to provide a cooling fluid to the one or more components of the earth-boring tool.