Temporary Wellbore Seal with Pressure-Responsive Shearing Element
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Solution Overview
Problem
Current systems for temporary sealing within wellbores lack an effective mechanism to break the seal once a pressure threshold is reached, hindering fluid flow and increasing operational costs in directional drilling.
Innovation Solution
The implementation of a temporary seal mechanism within the casing that includes a sliding projection, shearing element, and coupling mechanisms, which can be broken by increasing pressure, allowing fluid flow once the pressure exceeds a predetermined threshold, utilizing materials like glass or composite materials for the seal and shear screws or shear rings for disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temporary seal is used to limit fluid flow through the casing, then fluid flow control is improved, but the ability to release and restore fluid flow is hindered
Solution Approach 1:
The seal mechanism utilizes pressure as a controllable parameter. The temporary seal remains intact under normal pressure conditions but automatically breaks when the pressure differential exceeds a predetermined threshold, thereby restoring fluid flow. This parameter-based control resolves the contradiction by providing both reliable sealing and easy release through pressure modulation.
Solution Approach 2:
The patent replaces complex mechanical release mechanisms with a pressure-responsive breaking mechanism. Instead of requiring external mechanical intervention to release the seal, the system uses pressure-induced structural failure of the seal or its support structure, simplifying the release operation while maintaining reliable sealing during normal conditions.
2Productivity
If pressure is increased to break the temporary seal, then fluid flow is restored, but uncontrolled pressure release may cause harmful effects
Solution Approach 1:
The seal breaking mechanism incorporates a predetermined pressure threshold that acts as a feedback control. When the pressure differential reaches this threshold, the seal automatically breaks, preventing further pressure buildup. This feedback mechanism ensures controlled pressure release, restoring fluid flow while avoiding the harmful effects of uncontrolled pressure discharge.
Solution Approach 2:
The temporary seal is designed as a disposable component with a predetermined service life or pressure threshold. Once it has fulfilled its sealing function or the pressure threshold is exceeded, the seal is designed to break and be replaced. This approach allows for controlled pressure release and fluid flow restoration while managing the risks through planned component replacement rather than uncontrolled system failure.
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 controlled and efficient fluid flow through the casing by breaking the temporary seal when pressure exceeds a set limit, reducing operational costs and improving drilling efficiency.
Implementation Method 1
the temporary seal may be broken or disengaged by increasing the pressure within inner diameter of the casing past a pressure threshold
Data Source
AI summary
Examples of the present disclosure relate to a temporary seal within a wellbore. More specifically, embodiments include a temporary seal within casing that limits the flow of fluid through the casing until the temporary seal is released.