Wellbore Tool Vent for Rapid Packer Unsetting
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Solution Overview
Problem
Conventional systems face challenges in rapidly equalizing pressure within an annulus above a straddle packer pair, requiring time and additional fluid to unset packers, due to the creation of a fluid column during packer setting.
Innovation Solution
A vent system within a tool, featuring a sliding sleeve, adjustable member, and plunger, that opens and closes based on fluid flow rates to communicate between the tool's inner diameter and annulus, allowing rapid equalization of fluid levels and packer unsetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pumping methods are used to equalize pressure in the annulus, then pressure equalization is achieved, but it requires additional time and fluid
Solution Approach 1:
The patent extracts the fluid column from the tool by venting it through the annulus using a vent system with adjustable flow rate. This removes the obstacle (fluid column) preventing rapid pressure equalization, allowing packers to be unset quickly without requiring additional time and fluid for pumping operations
2Reliability
If conventional pumping methods are used to equalize pressure in the annulus, then pressure equalization is achieved, but it requires additional fluid
Solution Approach 1:
The vent system extracts and removes the fluid column from the tool through the annulus, eliminating the need for additional fluid to equalize pressure. The existing fluid is simply redirected through the vent path, achieving pressure equalization without consuming extra fluid resources
3Device complexity
If a vent with fixed flow rate is used, then pressure equalization is simplified, but it cannot adapt to different operating conditions
Solution Approach 1:
The vent system incorporates adjustable members (such as adjustable screws or movable plates) that allow the flow rate through the vent to be dynamically changed based on operating conditions. This enables the system to adapt to different fracturing parameters and well conditions while maintaining a relatively simple overall structure
Solution Approach 2:
The patent changes the flow rate parameter of the vent system by providing multiple vent passages of different sizes or by using adjustable members to modify the effective flow area. This allows the vent to operate effectively under varying pressure and flow conditions throughout the fracturing process
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
Enables quick unsetting of packers by rapidly equalizing fluid levels, reducing the need for additional fluid and time, and improving the efficiency of fracturing operations.
Implementation Method 1
The adjustable member may be configured to compress and elongate based on the fluid flow rate within the tool
Implementation Method 2
the plurality of orifices may be configured to allow communication between an annulus positioned outside of the tool and the inner diameter of the tool
Data Source
AI summary
Utilizing a fluid flow rate within a tool to close and open a vent extending through a circumference of the tool. The vent may be positioned above a packer pair that is configured to extend across an annulus. The tool may include a vent, sliding sleeve, adjustable member, and plunger.