Coiled Tubing Logging Plug Retrieval Tool
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Solution Overview
Problem
The existing bypass systems face challenges in efficiently retrieving a stuck coiled tubing logging plug, leading to costly interruptions in fluid extraction and potential damage to electrical submersible pumps.
Innovation Solution
A specialized tool is designed to retrieve the coiled tubing logging plug by passing through its through hole and coupling with the inner sleeve, allowing for the release and removal of the plug without disassembling the entire bypass system. The tool also features a sealing portion to prevent fluid flow through the plug, ensuring safe extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coiled tubing logging plug is deployed in the bypass system, then sealing between fluid tubing and coiled tubing is achieved, but retrieval becomes difficult when stuck
Solution Approach 1:
The retrieval tool is divided into distinct functional segments: a retrieving element with collets for grasping the plug, a setting mechanism for activating the collets, and a release mechanism for disengaging them. This segmentation allows each component to perform its specific function efficiently, enabling reliable sealing during operation while facilitating easy retrieval when needed.
Solution Approach 2:
The collets are designed with dynamic characteristics, transitioning from a relaxed state during deployment to an engaged state during retrieval. The setting mechanism activates the collets to grip the plug, and the release mechanism returns them to the relaxed state for disengagement. This dynamic behavior resolves the contradiction between maintaining reliable sealing and enabling easy retrieval.
2Adaptability or versatility
If the bypass system is used for logging operations, then access to well below pump is enabled, but fluid extraction is interrupted when plug retrieval is needed
Solution Approach 1:
The retrieval tool is pre-positioned and ready for deployment within the bypass system during logging operations. The collets are initially in a relaxed state that allows the plug to pass through during logging, but the retrieval mechanism is already in place to quickly activate and secure the plug when retrieval is required, minimizing interruption to fluid extraction.
Solution Approach 2:
The bypass system maintains continuous fluid extraction capability by allowing the logging plug to pass through during logging operations. When retrieval is needed, the quick-set retrieval mechanism secures the plug without requiring system shutdown or disassembly, ensuring continuous productivity throughout the operational cycle.
3Ease of operation
If the retaining sleeve is pulled into the plug to release it, then the plug can be unseated, but the tool string must be pulled into the plug which complicates retrieval
Solution Approach 1:
Instead of pulling the tool string into the plug to activate release, the invention inverts the approach by having the collets actively grasp and pull the plug toward the tool. The setting mechanism activates the collets to engage the plug, and the retrieval element pulls the plug upward for removal, simplifying the retrieval operation by reversing the traditional release mechanism.
Data Source
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AI summary
The invention relates to a tool comprising a retrieving portion for retrieving a coiled tubing logging plug from a downhole wherein the retrieving portion is configured and formed to be insertable into a through hole of the coiled tubing logging plug and to be coupleable with the coiled tubing logging plug in order to retrieve the coiled tubing logging plug.