Double Isolation Tool With Independent Seal Activation
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Solution Overview
Problem
Conventional line-stopping systems fail to meet the criteria for double-block and bleed (DBB) or double isolation and bleed (DIB) isolation systems, particularly in terms of seal engagement and safety, due to issues with seal energization, plug alignment, and large installation footprints.
Innovation Solution
The development of an isolation tool with a head unit featuring grooves with circumferential seal elements that expand radially upon force application, allowing for independent activation and monitoring of seals, and incorporating a locking mechanism for secure seal engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional line-stopping systems use traditional seal mechanisms, then the system structure is simple, but the seal engagement reliability is insufficient and cannot meet DBB or DIB isolation system criteria
Solution Approach 1:
The patent employs dynamic seal elements that can change their engagement state based on operational conditions. The seal mechanism transitions from a static configuration to a dynamic one where seals can be independently activated and monitored, ensuring reliable engagement while adapting to pressure changes in the pipeline.
Solution Approach 2:
The isolation tool is divided into separate functional modules with independent seal elements. Each seal can be activated and monitored independently, allowing the system to meet DBB or DIB criteria without requiring a completely complex integrated structure. This segmentation enables reliable isolation while maintaining manageable system complexity.
2Adaptability or versatility
If conventional systems use large installation footprint designs, then the device structure is straightforward, but the adaptability to different pipeline configurations is limited
Solution Approach 1:
The patent utilizes a nested structure where components are arranged concentrically within the isolation tool body. The seal elements, actuators, and monitoring systems are nested within each other, minimizing the radial and axial dimensions required for installation while maintaining full functionality across different pipeline configurations.
Solution Approach 2:
The design transitions from a two-dimensional planar layout to a three-dimensional compact arrangement. By utilizing vertical stacking and radial arrangement of components, the system achieves high adaptability to various pipeline configurations without increasing the horizontal installation footprint.
3Reliability
If conventional systems activate all seals simultaneously, then the control mechanism is simple, but the ability to monitor and respond to individual seal conditions is lost
Solution Approach 1:
The patent incorporates feedback mechanisms for each seal element, allowing independent monitoring of seal engagement conditions. Sensors detect the state of each seal and provide feedback to the control system, enabling real-time assessment of isolation effectiveness and early detection of potential failures without requiring complex centralized control.
Solution Approach 2:
Each seal element is equipped with its own actuation and monitoring capabilities, allowing it to function semi-independently. The seals can self-regulate their engagement based on local conditions, reducing the need for complex external control mechanisms while maintaining reliable monitoring of individual seal states.
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 isolation tool provides enhanced safety and functionality by ensuring double-block and bleed isolation, independent seal activation, and reduced installation footprint, while maintaining effective sealing performance regardless of pipeline pressure.
Implementation Method 1
a force at or near the first end of the groove imparts radial expansion of the circumferential seal element at the second end of the groove via the curvature in the groove
Data Source
AI summary
The present disclosure provides an isolation tool for isolating a section of pipe or a vessel and methods for isolating a section of a pipe or a vessel. In particular, the present disclosure provides a double isolation and bleed (DIB) isolation tool, for use in line-stopping operations and methods of line isolation employing the isolation tool.