Downhole Catcher Device Mode Switching Mechanism
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Solution Overview
Problem
Current downhole catcher devices are inadequate in efficiently catching operation elements while allowing downstream tool operation, as they either fail to capture or allow escape of elements due to mode transitions and flow dynamics.
Innovation Solution
A downhole catcher device with a catching mechanism that can switch between modes, using a swivel coupling and diverter mechanism to catch operation elements, and a delay device to ensure capture of elements during mode transitions, allowing for efficient operation and retention of elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catching mechanism is designed to catch operation elements, then the retention of elements is improved, but the ability to allow downstream tool operation deteriorates
Solution Approach 1:
The catching mechanism is designed to be dynamic, transitioning between a first mode where it allows operation elements to pass through to a second mode where it catches them. This dynamic switching capability resolves the contradiction by allowing the mechanism to adapt its behavior based on operational requirements, enabling both downstream tool operation and element retention as needed
2Adaptability or versatility
If the catching mechanism switches between modes, then the versatility of operation is improved, but the reliability of element capture deteriorates due to mode transitions
Solution Approach 1:
A delay device is incorporated that delays the transition from the second mode back to the first mode after operation elements have been caught. This preliminary action ensures that elements are securely retained during the mode transition process, preventing premature release and maintaining capture reliability even as the mechanism switches between operational states
Data Source
AI summary
A downhole catcher device comprises a catching mechanism which is configured to be transferable between a first mode and a second mode. The catching mechanism is further configured for passing by a first operation element if the catching mechanism is in the first mode and for catching a second operation element if the catching mechanism is in the second mode. The transfer between the first and the second mode is triggered (or effected) by a downhole tool which is operated by the second operation element.