Profiled Fishing Tool Retrieving Flared Objects
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Solution Overview
Problem
Existing fishing tools face challenges in efficiently retrieving objects with flared or oblong profiles from wellbores without the need for traditional milling methods, especially when these objects become stuck or lodged, requiring innovative mechanisms for secure engagement and release.
Innovation Solution
The development of a tubular fishing tool with profiled surfaces and inserts that facilitate the alignment and securement of flared or oblong objects within the wellbore, allowing for their retrieval without the need for milling, using a combination of mechanical input and guides to ensure proper alignment and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional fishing tools are used to retrieve objects with flared or oblong profiles, then the objects can be retrieved, but traditional milling methods are required which increase operational complexity and time
Solution Approach 1:
The fishing tool incorporates pre-configured profiled surfaces and inserts that are designed in advance to match flared or oblong object profiles. These features are built into the tool structure before deployment, eliminating the need for on-site milling operations and reducing operational complexity while maintaining high retrieval efficiency
2Reliability
If profiled surfaces are added to the fishing tool to engage flared or oblong objects, then engagement security is improved, but the device complexity increases
Solution Approach 1:
The profiled surfaces are implemented as separate, removable inserts rather than integral parts of the tool body. This segmentation allows the complex profiling features to be added without permanently increasing tool structure complexity, as the inserts can be easily installed and removed, maintaining tool simplicity while providing secure engagement for flared or oblong objects
3Adaptability or versatility
If the fishing tool is designed to accommodate flared or oblong profiles, then versatility is improved, but the ease of operation may be reduced due to alignment requirements
Solution Approach 1:
The inserts are designed with asymmetric profiled surfaces that correspond to the asymmetric geometry of flared or oblong objects. This asymmetric design provides natural alignment cues during operation, allowing the operator to easily orient the tool correctly by matching the asymmetric profiles, thereby maintaining ease of operation while achieving high versatility for different object types
Data Source
AI summary
Fishing tools for retrieving objects, i.e., “fish,” lodged within a wellbore are disclosed. The fishing tool comprises a tubular member having a tubular member bore with at least one profiled surface or insert disposed within or along the inner wall surface of the tubular member bore. The profiled surface or insert provides a fishing profile shaped to allow a portion of the fish to move past the fishing profile so that the fishing profile is disposed below the portion of the fish. The tubular member can then be actuated, such as through rotation, to align the portion of the fish with a shoulder of the fishing profile. Upward movement of the tool engages the shoulder with the portion of the fish. Continued upward movement of the tool facilitates retrieval of the fish from the wellbore.