Closed-Cell Swell Packer Seal for Fast, Strong Wellbore Sealing
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Solution Overview
Problem
Conventional swellable packers made from dense elastomeric materials face a trade-off between swellability and material strength, as increasing swellability often weakens the material.
Innovation Solution
Incorporating a closed cell structure with compressible gas-filled pore spaces within the elastomeric material, allowing for increased swellability without compromising material strength, and enabling more homogeneous swelling and rapid fluid absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the amount of cure of the elastomeric material is reduced to increase swellability, then the swellability is improved, but the material strength is weakened
Solution Approach 1:
The elastomeric material is formulated with a closed-cell foam structure containing gas-filled pores. This porous architecture enables the material to absorb fluids and swell significantly while the cured elastomeric matrix maintains structural integrity and material strength. The gas-filled pores provide void space for fluid absorption without requiring excessive uncured polymer chains.
Solution Approach 2:
The invention creates a composite elastomeric material combining a cured polymer matrix with dispersed gas-filled pores. This composite structure allows the material to exhibit both high swellability (through pore expansion and fluid absorption) and maintained strength (through the cured matrix framework), resolving the traditional trade-off between these properties.
2Quantity of substance
If conventional dense elastomeric materials are used, then material strength is maintained, but swellability and swelling rate are limited
Solution Approach 1:
The closed-cell foam structure provides pre-formed pores that rapidly absorb fluid upon contact, enabling fast swelling rates. The porous architecture increases the surface area and internal volume available for fluid absorption, dramatically accelerating the swelling process compared to dense materials that must rely on slow diffusion through the polymer matrix.
Solution Approach 2:
The invention changes the physical structure of the elastomeric material from dense to porous by incorporating gas-filled pores. This structural parameter change enables the material to achieve both high swellability and rapid swelling rates, as the pores provide immediate pathways for fluid absorption and expansion.
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 enhances swellability, achieves faster swelling rates, and ensures consistent swelling across the cross-section, while maintaining material integrity, allowing for effective sealing and pressure resistance.
Implementation Method 1
The seal element may then be exposed to a fluid (e.g., water or hydrocarbons) to trigger the swelling of the packer's seal element
Implementation Method 2
a closed cell structure having a plurality of pore spaces therein, and a compressible gas located within at least a portion of the plurality of pore spaces
Data Source
AI summary
Swell packer assemblies for providing a physical barrier inside a wellbore, and methods of using such swell packer assemblies, are provided. In one embodiment, the swell packer includes a substantially tubular member; and a seal element disposed on the substantially tubular member, the seal element including an elastomeric swellable material that comprises: a closed cell material having a plurality of pore spaces therein; and a compressible gas located within at least a portion of the plurality of pore spaces.