Expandable Isolation Assembly for Downhole Fluid Barrier
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Solution Overview
Problem
Current well stimulation operations face challenges in effectively forming and maintaining fluid barriers downhole to isolate specific stages of a well for enhanced hydraulic communication and stimulation processes.
Innovation Solution
A deformable isolation assembly is deployed and anchored within a tubing string, featuring a radially contracted state for easy insertion and an expandable mechanism to form a fluid barrier by catching an object, allowing for secure anchoring and fluid isolation at targeted locations within the well.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional rigid isolation assembly is used, then it can provide stable fluid barrier, but it cannot be easily deployed through existing tubing string
Solution Approach 1:
The isolation assembly transitions from a compressed flexible state during deployment to an expanded rigid state during operation. The assembly includes expandable elements that can be transformed from a compact configuration for passing through tubing to an expanded configuration for forming effective fluid barriers, resolving the contradiction between ease of deployment and operational reliability
Solution Approach 2:
The isolation assembly is designed with nested or telescoping components that allow the structure to collapse into a compact form for deployment through existing tubing string, then expand to full size at the target location to provide stable fluid isolation, enabling both easy deployment and reliable performance
2Reliability
If the isolation assembly is made rigid for stability, then it can maintain fluid barrier, but it cannot be deformed for anchoring to tubing string
Solution Approach 1:
The assembly incorporates dynamically transformable structures that can change from rigid to flexible states. During deployment, the assembly deforms to conform to and anchor onto the tubing string surface, then maintains its expanded rigid form to provide stable fluid barrier, achieving both adaptability for anchoring and reliability for fluid isolation
Solution Approach 2:
The mechanical properties of the isolation assembly are changed through parameter transformation - the material or structural parameters are adjusted to allow deformation during anchoring, then locked into a stable configuration for fluid barrier maintenance, enabling both adaptability and reliability
3Reliability
If the isolation assembly is deployed in expanded state, then it can form fluid barrier immediately, but it cannot pass through the tubing string
Solution Approach 1:
The isolation assembly uses dynamic transformation between compressed and expanded states. It is deployed in a compressed flexible state with reduced dimensions to pass through the tubing string, then expanded at the target location to form the fluid barrier, resolving the contradiction between deployable size and barrier formation capability
Solution Approach 2:
The assembly employs nested or telescoping结构设计 that allows components to be collapsed into each other during deployment to reduce overall size for passing through tubing, then expanded at the destination to provide immediate fluid barrier formation, enabling both small deployment profile and effective barrier creation
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
This solution enables efficient and controlled downhole operations by creating reliable fluid barriers within the well, facilitating hydraulic fracturing and other stimulation processes by isolating stages and diverting fluids effectively.
Implementation Method 1
The expansion tool is adapted to deform the tubular assembly to anchor the tubular assembly to the tubing string
Implementation Method 2
The restriction is adapted to catch an object that is deployed into the well to form a fluid barrier when caught by the restriction
Data Source
AI summary
An apparatus that is usable with a well includes a tubular assembly and an expansion tool. The tubular assembly has a radially contracted state and includes a restriction. The restriction is adapted to catch an object that is deployed into the well to form a fluid barrier when caught by the restriction. The expansion tool is deployed downhole with the tubular assembly inside a tubing string. The expansion tool is adapted to deform the tubular assembly to anchor the tubular assembly to the tubing string.