Electro-Mechanical Actuation for Drilling Assembly Tilt Control
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Solution Overview
Problem
Current drilling technologies for deviated wellbores rely on hydraulic steering devices, which may not offer precise control and efficiency in tilting the drill bit, limiting the ability to form complex wellbore trajectories effectively.
Innovation Solution
An electro-mechanical actuation device is integrated into the drilling assembly to tilt the drill bit about a joint, allowing for precise control and directional adjustment of the drill bit's tilt angle using a motor-driven rotary member and force application mechanism, enabling more precise geosteering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hydraulic steering devices are used to tilt the drill bit, then the drilling assembly can form deviated wellbores, but the control precision and efficiency are insufficient
Solution Approach 1:
The patent replaces the hydraulic steering device with an electro-mechanical actuation device that uses a motor-driven rotary member to tilt the drill bit. This substitution of hydraulic system with electro-mechanical system provides more precise control through electrical actuation while maintaining manageable device complexity through integrated design.
Solution Approach 2:
The patent changes the control parameter from hydraulic pressure to electrical signals and motor rotation angles. The electro-mechanical actuation device allows for precise adjustment of the drill bit tilt angle through controlled rotation of the rotary member, enabling finer control precision compared to hydraulic systems.
2Productivity
If hydraulic steering devices are used to tilt the drill bit, then deviated wellbores can be formed, but the efficiency in tilting the drill bit is limited
Solution Approach 1:
The electro-mechanical actuation device with motor-driven rotary member provides faster and more efficient tilting action compared to hydraulic systems. The direct electrical actuation eliminates hydraulic fluid dynamics delays, enabling quicker response and more efficient drill bit tilting while maintaining precise directional control.
3Measurement precision
If electro-mechanical actuation device is used to tilt the drill bit, then precise control and efficiency are improved, but the device complexity increases
Solution Approach 1:
The electro-mechanical actuation device is designed to perform multiple functions: tilting the drill bit, providing precise geosteering control, and potentially integrating with existing drilling assembly components. This multi-functionality justifies the increased device complexity by consolidating several functions into a single integrated system.
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 solution enhances the ability to drill deviated wellbores with improved precision and control, allowing for the formation of wellbores with desired trajectories and reducing operational complexity by leveraging electro-mechanical actuation for efficient directional changes.
Implementation Method 1
An electro-mechanical actuation device is integrated into the drilling assembly to tilt the drill bit about a joint, allowing for precise control and directional adjustment of the drill bit's tilt angle using a motor-driven rotary member
Data Source
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AI summary
A drilling assembly for use in drilling a wellbore is disclosed that in one embodiment includes a steering unit that includes a tilt device in a disintegrating device and an electro-mechanical actuation device having a force application member that applies axial force on the disintegrating device to tilt the disintegrating device about the tilt device along a selected direction. In one embodiment, the actuation device translates a rotary motion into an axial movement of the force application member to apply the axial force on the disintegrating device to tilt the disintegrating device about the tilt device.