Expandable Metal Seal Assembly for Irregular Surface Sealing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Metal seals require smooth and clean surfaces for effective sealing, while elastomeric seals degrade rapidly in dynamic configurations, limiting their use in environments with pressure differentials and moving surfaces.

Innovation Solution

Utilizing pre-expansion expandable metal within an enclosed seal gland that expands via hydrolysis to form an expanded metal seal, which can accommodate irregular and unclean surfaces, providing resilient biasing force and self-healing capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If metal seals are used, then sealing force and durability are improved, but surface requirements become more stringent and installation force increases

Engineering Contradiction:

Improvesealing durabilityVSAvoidsurface smoothness requirement

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent changes the material parameter from traditional metal to expandable metal alloy, which transforms from a compact state to an expanded porous state upon water exposure. This parameter change enables the seal to adapt to surface irregularities while maintaining durability, resolving the contradiction between sealing reliability and surface precision requirements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The seal transitions from a static metal component to a dynamic expandable structure that changes volume and density in response to environmental conditions (water exposure). This dynamic transformation allows the seal to conform to varying surface conditions, eliminating the need for perfectly smooth surfaces while maintaining reliable sealing

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If elastomeric seals are used, then adaptability to irregular surfaces is improved, but durability in dynamic configurations deteriorates

Engineering Contradiction:

Improvesurface irregularity toleranceVSAvoiddurability under pressure differential

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent employs a composite material system combining expandable metal alloy with polymeric binding agents. This composite structure integrates the adaptability of polymeric materials with the durability and strength of metal, creating a seal that can tolerate surface irregularities while maintaining reliability under pressure differentials and dynamic conditions

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The expandable metal alloy undergoes a dramatic parameter change from compact to expanded state, increasing volume by 3-4 times. This transformation creates a structure with high surface area and compliance, enabling adaptation to irregular surfaces while the metal framework maintains structural integrity and durability under pressure

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If expandable metal is used, then adaptability to surface conditions and resilient biasing force are improved, but installation complexity increases

Engineering Contradiction:

Improvesurface condition accommodationVSAvoidinstallation process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The expandable metal is pre-formed into a compact, manageable shape that is easy to install in the initial state. The expansion action is triggered automatically upon water exposure, eliminating the need for complex installation mechanisms. This preliminary compact form reduces installation complexity while the subsequent automatic expansion provides the required adaptability

Inventive Principle:

Principle #10Preliminary action

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 expanded metal seal effectively seals against varying surface conditions, reduces installation force, and compensates for eccentricities, while maintaining sealing integrity under pressure differentials and dynamic conditions.

Implementation Method 1

pre-expansion expandable metal subjected to reactive fluid to form expanded metal within the enclosed seal gland

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Data Source

PatentUS12421824B2Using expandable metal as an alternate to existing metal to metal seals

Publication Date: 2025.09.23 HALLIBURTON ENERGY SERVICES INC

AI summary

Provided is a seal assembly, a method for sealing, and a well system. The seal assembly, in one aspect, includes a pipe having an outer tubular positioned thereabout, the outer tubular and pipe forming an enclosed seal gland. The seal assembly, according to this aspect, further includes expanded metal positioned within the enclosed seal gland, the expanded metal comprising a metal that has expanded in response to hydrolysis to assist in sealing the enclosed seal gland.