Swellable Packer Recess Design for Faster Swelling and Anchoring
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Solution Overview
Problem
Swellable packers used in subterranean wells take too long to swell and have inadequate anchoring and differential pressure resisting capabilities after swelling, necessitating improvements in their construction.
Innovation Solution
A swellable packer design featuring a fluid channel with a circumferentially extending recess on its surface, which enhances swelling and sealing by distributing the activating fluid more evenly across the swellable material, increasing the surface area exposed and thus the swelling rate and gripping force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional swellable packer design is used, then the packer can seal annular spaces, but it takes many hours or even days to swell sufficiently and anchoring capability is inadequate
Solution Approach 1:
The seal is segmented into multiple sections with recesses formed in the outer surface, creating channels that divide and distribute the activating fluid across different regions of the seal simultaneously, enabling faster and more uniform swelling throughout the entire seal structure
Solution Approach 2:
The seal incorporates a porous structure with recesses that allow activating fluid to penetrate and distribute throughout the seal material, significantly accelerating the swelling process while maintaining structural integrity and anchoring capability
2Reliability
If conventional swellable packer design is used, then the packer can provide some sealing, but differential pressure resisting capability is inadequate
Solution Approach 1:
The seal is divided into multiple sections by recesses that create independent swelling zones, allowing each section to swell and seal independently, thereby distributing and withstanding differential pressure across multiple points rather than a single continuous seal
Solution Approach 2:
The recesses are formed with curved surfaces that promote uniform radial swelling of the seal material, creating a more consistent seal geometry that better resists differential pressure forces acting on the packer
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 enhanced design results in faster swelling and improved sealing and anchoring capabilities, allowing for more effective sealing of annular spaces in wells and increased resistance to differential pressures.
Implementation Method 1
a fluid channel is formed in a swellable seal of the packer... distributing the activating fluid more evenly across the swellable material
Implementation Method 2
distributing the activating fluid more evenly across the swellable material, increasing the surface area exposed and thus the swelling rate
Implementation Method 3
swellable packer... swellable seal... swelling and sealing capabilities... faster swelling and improved sealing and anchoring capabilities
Data Source
AI summary
A swellable packer for use with a subterranean well can include a swellable seal having a circumferentially extending recess formed on a surface of the seal. Another swellable packer can include a swellable seal having a helically extending recess formed in the seal. A method of constructing a swellable packer can include forming a circumferentially extending recess on a surface of a swellable seal.