Coiled Tubing Logging Plug Retrieval Tool Design
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Solution Overview
Problem
The coiled tubing logging plug often becomes stuck in the fluid tubing of a bypass system, leading to costly interruptions in fluid extraction and potential damage to the electrical submersible pump.
Innovation Solution
A tool with a sealing portion and a retrieving portion is used to address the issue. The sealing portion seals the through hole of the coiled tubing logging plug, allowing for continued fluid extraction, while the retrieving portion, which can pass partly through the plug's hole, is designed to couple with the end of the coiled tubing logging plug to facilitate its retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coiled tubing logging plug is deployed to seal between the fluid tubing and coiled tubing, then sealing effectiveness is improved, but the risk of the plug becoming stuck increases
Solution Approach 1:
The tool is divided into distinct functional segments: a sealing portion with sealing elements that can seal the through-hole, and a retrieving portion with a retrieving element. This segmentation allows the tool to perform multiple functions (sealing and retrieving) independently, resolving the contradiction by providing a dedicated retrieving mechanism that can free a stuck plug without compromising the sealing function.
Solution Approach 2:
The retrieving element acts as an intermediary mechanism between the tool and the stuck plug. It can engage with the plug (either inside or outside the through-hole) and apply extracting force to free the plug without directly affecting the sealing elements, thus mediating between the sealing function and the retrieval function.
2Productivity
If the coiled tubing logging plug becomes stuck in the fluid tubing, then operational continuity is maintained, but costly interruptions and potential pump damage occur
Solution Approach 1:
The tool is designed with pre-configured sealing and retrieving elements that are ready for immediate deployment. The sealing elements can be activated to maintain sealing before retrieval begins, and the retrieving element is positioned to engage the plug without requiring complex assembly, enabling quick response to stuck plug situations and minimizing operational interruptions.
Solution Approach 2:
The tool can change its operational parameters dynamically: the sealing elements can be activated or deactivated, and the retrieving element can be positioned inside or outside the through-hole depending on the situation. This flexibility allows the tool to adapt to different stuck plug scenarios, maintaining operational continuity while preventing damage.
3Ease of operation
If a retrieving tool is designed to pass through the through-hole of the plug, then retrieval capability is improved, but the tool complexity increases
Solution Approach 1:
The tool is designed as a multi-functional device where the same basic structure serves multiple purposes: the sealing elements seal the through-hole, while the retrieving element (which can be positioned inside or outside the through-hole) retrieves the plug. This universal design reduces the need for multiple separate tools, simplifying overall system complexity while maintaining high retrieval capability.
Data Source
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AI summary
The invention relates to a tool comprising a sealing portion for downhole sealing a through hole of a coiled tubing logging plug and a retrieving portion for retrieving the coiled tubing logging plug from the downhole wherein the retrieving portion is connected with the sealing portion and wherein the sealing portion and the retrieving portion are configured and formed to be insertable into the through hole of the coiled tubing logging plug..