Cyclic Pressure Well Plug Activation Mechanism
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Solution Overview
Problem
Existing solutions for controlling and removing well plugs in hydrocarbon recovery operations, such as those used in oil and gas wells, face challenges with reliability, safety, and environmental concerns, particularly when using explosive charges, which are subject to stringent regulations and may not provide precise control over the removal process.
Innovation Solution
A device utilizing cyclic pressure loads to control and activate well plugs, comprising a sleeve-shaped element with breakable strata and fluid-filled chambers, and a mechanism with a movement mechanism, stopper element, and block release element, which applies pressure differentials to disintegrate the plug in a controlled manner, avoiding the need for explosive charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If explosive charges are used to remove well plugs, then the plug can be removed effectively, but safety risks and environmental harm increase
Solution Approach 1:
The patent replaces the chemical/explosive removal system with a mechanical system. A retrieval tool with a gripping element mechanically engages with the well plug and applies controlled mechanical forces to break up and retrieve the plug, eliminating the need for explosive charges and their associated safety and environmental risks.
Solution Approach 2:
The patent introduces a retrieval tool as an intermediary between the operator and the well plug. This tool serves as a safe mediator that mechanically interacts with the plug to achieve removal without directly using hazardous explosive materials in the wellbore environment.
2Duration of action of stationary object
If retrievable plugs are left in the well for extended periods, then they can perform their shutdown function, but they tend to jam or deform making retrieval difficult
Solution Approach 1:
The patent applies preliminary action by incorporating a retrieval mechanism into the well plug design from the beginning. The plug includes a gripping element or feature that is prepared in advance to engage with the retrieval tool, ensuring that retrieval remains easy even after extended periods of service, preventing jamming and deformation issues.
Solution Approach 2:
The patent segments the well plug into functional components, with a retrieval feature separated from the sealing/shutdown function. This segmentation allows the plug to maintain its shutdown capability while having a dedicated retrieval mechanism that prevents jamming and facilitates easy recovery regardless of service duration.
3Productivity
If permanent plugs made of soft or reactive materials are used, then they can be destroyed by chemical or mechanical means, but there is high uncertainty about complete removal
Solution Approach 1:
The patent replaces chemical destruction methods with a mechanical retrieval system. Instead of using chemicals to destroy soft or reactive material plugs with uncertain completeness, the invention uses a mechanical retrieval tool that positively engages with and physically recovers the plug, providing certain verification of complete removal.
Solution Approach 2:
The patent enables the plug to serve its own retrieval function through integrated retrieval features. The plug design includes elements that automatically engage with the retrieval tool, making the retrieval process self-evident and complete without requiring chemical destruction or uncertain verification methods.
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 device ensures safe, reliable, and precise activation of well plugs, reducing the risk of inadvertent opening and providing greater flexibility and safety in well operations by using cyclic pressure loads to disintegrate the plug, allowing for controlled opening and precise timing.
Implementation Method 1
By applying, through suitable means, a number of cyclic loads in the form of pressure increases and reductions to a fluid located in the elongated element
Implementation Method 2
on application of repeated cyclic loads, the movement mechanism in the device according to the present invention will be moved relative to the stopper element and the block release element
Implementation Method 3
the block release element via a release pin will open up a connection between the volume and a number of relief recesses for discharging the volume
Data Source
AI summary
Device for controlling and/or operating underwater equipment employed in connection with recovery of hydrocarbons. The device has a hollow sleeve with a number of recesses and a closed volume, in which recesses a movement mechanism, a stopper element and a block release element are mounted. Under cyclic loading, the movement mechanism will be moved relative to the stopper element and the block release element into a position where the block release element via a release pin will open up a connection between the closed volume and a number of relief recesses. At least one push rod is activated for operating in the device's longitudinal direction.