Expandable Well Screen Shunt Conduits for Uniform Gravel Packing
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Solution Overview
Problem
Existing well completion systems face challenges in achieving uniform distribution of slurries and gravel packs in subterranean wells, as conventional shunt tubes may not effectively fill voids or less dense areas, leading to inefficient filtration and sand control.
Innovation Solution
An expandable well screen with slurry delivery shunt conduits and a swellable material that expands when contacted with a fluid, allowing for uniform gravel packing and enhanced filtration by displacing shunt conduits outward to direct slurry into voids and less dense areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional shunt tubes are used to flow slurry, then slurry distribution is improved, but uniform filling of voids and less dense areas is not achieved
Solution Approach 1:
The shunt conduits are designed to be expandable from a compressed delivery configuration to an expanded deployment configuration. This dynamic transformation allows the conduits to adapt their geometry in situ, enabling them to effectively fill voids and less dense areas of the gravel pack that static conventional shunt tubes cannot reach
Solution Approach 2:
The system changes the physical state and geometry of the shunt conduits by expanding them after deployment. This parameter change from compressed to expanded state allows the conduits to achieve the necessary dimensions for uniform slurry distribution and effective void filling while maintaining ease of delivery through the wellbore
2Reliability
If expandable well screens are deployed, then filtration efficiency is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple functions into a single integrated system: the well screen provides filtration while the integrated shunt conduits provide slurry distribution and void filling. This combination achieves enhanced filtration efficiency and uniform gravel packing without requiring separate independent systems, thereby managing device complexity
3Quantity of substance
If shunt conduits are positioned between filter sections, then slurry flow distribution is improved, but ease of operation during installation is reduced
Solution Approach 1:
The shunt conduits are pre-positioned between the filter sections during manufacturing or pre-assembly. This preliminary action ensures that the conduits are correctly located before deployment, eliminating the need for complex in-situ positioning operations and simplifying the installation process while maintaining optimal slurry flow distribution
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 solution ensures a more uniform and efficient gravel pack by allowing slurry to flow through expanded shunt conduits, improving filtration efficiency and sand control in subterranean wells.
Implementation Method 1
a swellable material which expands when contacted with a fluid in the well
Implementation Method 2
flowing the slurry through the shunt conduits
Implementation Method 3
The filter sections filter fluid which flows between an interior and an exterior of the well screen
Data Source
AI summary
A well screen can include multiple filter section ends, the filter section ends being displaced outward in response to expansion of the well screen, and a slurry delivery shunt conduit positioned circumferentially between the filter section ends. A method of delivering a slurry into a wellbore about a well screen can include positioning slurry delivery shunt conduits between multiple circumferentially spaced apart filter sections of the well screen, the filter sections radially outwardly displacing in a well, and flowing the slurry through the shunt conduits. A well system can include multiple well screens positioned in a wellbore, and shunt conduits which deliver a slurry into the wellbore about the well screens, the shunt conduits being positioned circumferentially between filter sections of the well screens.