Switchable Magnetic Gauge Hanger for Reliable Wellbore Deployment
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Solution Overview
Problem
Existing gauge hangers for wellbores are complex, require multiple magnets, and may prevent access to the wellbore, or risk detachment of cables, making reliable deployment and retrieval challenging.
Innovation Solution
A gauge hanger with a switchable magnet and coupling assembly actuated by a common actuator, allowing secure attachment and detachment using a single mechanism, enabling reliable deployment and retrieval without obstructing wellbore access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple permanent magnets or electromagnets are used to attach the gauge hanger to the tubing, then the attachment reliability is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple magnet functions into a single switchable magnet assembly that can be controlled by one actuator. The coupling assembly integrates the actuation mechanism for both the switchable magnet and the cable release, reducing the number of separate components while maintaining reliable attachment and release functionality.
Solution Approach 2:
The single actuator serves multiple functions: it controls the switchable magnet to attach/detach the gauge hanger and simultaneously operates the coupling assembly to release the cable. This multi-functional design reduces complexity while ensuring coordinated operation of all attachment mechanisms.
2Reliability
If a cable is permanently attached to the downhole instrument, then the instrument can be securely deployed, but the risk of cable detachment before gauge hanger attachment increases
Solution Approach 1:
The gauge hanger is attached to the tubing wall via the switchable magnet before the cable is released from the coupling assembly. This preliminary attachment ensures that the instrument is securely positioned on the wellbore wall before any cable release occurs, eliminating the risk of premature detachment.
Solution Approach 2:
The coupling assembly acts as an intermediary mechanism between the cable and the gauge hanger. It provides a controlled release mechanism that only detaches the cable after confirming the gauge hanger is securely attached to the tubing, mediating the transition from secured to released state.
3Reliability
If traditional expanding gripper means or special profile seating is used, then the gauge hanger can be securely attached to the tubing, but access to the wellbore for other intervention tools is blocked
Solution Approach 1:
The patent replaces traditional mechanical attachment mechanisms (expanding grippers, profile seating) with a magnetic attachment system. The switchable magnet provides secure attachment through magnetic force while having a compact profile that allows other intervention tools to pass by and access the wellbore, maintaining both security and versatility.
4Device complexity
If a single common actuator is used to control both the switchable magnet and coupling assembly, then the device complexity is reduced, but the requirement for coordinated actuation increases
Solution Approach 1:
The coupling assembly merges the actuation mechanisms for the switchable magnet and the cable release into a single integrated system. One actuator controls both functions through mechanical linkage, reducing the number of control elements while ensuring that both actions occur in the proper sequence.
Solution Approach 2:
The mechanical linkage in the coupling assembly is designed so that actuation of the switchable magnet occurs first, followed by the cable release. This built-in sequencing ensures that the gauge hanger is attached before the cable is released, eliminating the need for complex external coordination while maintaining ease of operation.
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 provides a less complex system that ensures reliable attachment and detachment of the gauge hanger to the wellbore wall, allowing long-term deployment while maintaining access for other tools and preventing dislodgment by fluid flow or tool interference.
Implementation Method 1
a switchable magnet for attaching the gauge hanger to a wellbore wall; In the activated state, the switchable magnet preferably produces an external magnetic field sufficient to attach the gauge hanger to the wellbore wall
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
A gauge hanger for deployment in a wellbore using a setting tool is disclosed. The gauge hanger (12) comprises a switchable magnet (32, 34) for attaching the gauge hanger to a wellbore wall, and a coupling assembly (30) for coupling the gauge hanger to the setting tool (14). The switchable magnet (32, 34) and the coupling assembly (30) are arranged to be actuated by a common actuator such as a motor (24) in the setting tool.