Steering Valve Deactivates Rotary Steerable Pads
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Solution Overview
Problem
Deactivating the steering pads of a rotary steerable system in a wellbore is challenging, leading to excessive wear, unnecessary torque, and potential damage to the wellbore and system components.
Innovation Solution
A steering valve is introduced that can control fluid flow to the steering pads, featuring a cut-off portion that blocks fluid flow to deactivate the pads, thereby preventing actuation and reducing wear and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steering pads are continuously actuated to maintain steering capability, then steering control is improved, but wear and damage to components increases
Solution Approach 1:
The steering valve is positioned to proactively block fluid flow channels before the steering pads can be actuated in unwanted conditions. By预先 closing the fluid passages through the valve body structure, the system prevents unnecessary pad activation that would lead to wear and damage, while maintaining the ability to steer when needed.
2Duration of action of stationary object
If steering pads are deactivated to reduce wear, then component life is extended, but steering capability is lost
Solution Approach 1:
The steering valve incorporates a movable valve member that can dynamically transition between open and closed positions. This allows the system to switch between deactivated (reducing wear) and activated (providing steering capability) states as needed, making the system adaptable to different operational requirements rather than being fixed in one state.
Solution Approach 2:
The valve design includes flow paths that respond to pressure differentials created during drilling operations. When steering is needed, pressure builds up and opens the valve to activate pads; when not needed, pressure equalizes and the valve closes to deactivate pads, creating an automatic feedback mechanism that balances component protection with operational capability.
3Speed
If fluid flow is continuously supplied to steering pads, then steering responsiveness is improved, but unnecessary torque and wellbore damage occur
Solution Approach 1:
The valve body structure extracts or removes fluid from the flow path through strategically positioned blocking surfaces and closed chambers. By taking the fluid out of the steering pad actuation path when not needed, the system prevents unnecessary pad activation that would generate harmful torque and potential wellbore damage, while allowing rapid fluid supply when steering responsiveness is required.
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 steering valve effectively deactivates the steering pads, reducing wear and damage, maintaining system performance, and extending the life of components while preventing wellbore damage.
Implementation Method 1
The steering valve can include a cut-off portion that can be used to prevent fluid from flowing to each of the steering pads
Data Source
AI summary
A rotary steerable drilling system can be positioned in a subterranean formation to steer a drill to form a wellbore in the subterranean formation. An orientation of a steering valve, which is positioned in the rotary steerable drilling system, can be adjusted to cover each channel of one or more channels of a valve seat adjacent the steering valve to deactivate each steering pad of one or more steering pads of the rotary steerable drilling system. The orientation of the steering valve can be adjusted to activate at least one steering pad of the one or more steering pads of the rotary steerable drilling system.