Cementitious Swell Packer for Oil Well Zonal Isolation

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Solution Overview

Problem

Elastomeric swell packers used in oil wells degrade prematurely, leading to failures, contamination, and increased capital costs due to high failure rates, poor performance in saline or alkaline environments, and the need for multiple packers to handle media changes, along with issues like displacement and damage from differential movement.

Innovation Solution

A flexible composite system using a cementitious powder that expands and sets into a durable seal when exposed to aqueous media, providing long-term performance, resistance to high pressures and shear loads, and maintaining integrity in harsh environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If elastomeric swell packers are used for zonal isolation, then sealing function is achieved, but the packers degrade prematurely causing failure and contamination

Engineering Contradiction:

Improvepacker durabilityVSAvoidservice life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent changes the material parameter from elastomeric compound to cementitious material, which fundamentally alters the chemical and physical properties to achieve long-term stability and resistance to degradation in well environments

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite cementitious materials that combine multiple components to achieve both the swelling capability needed for sealing and the long-term durability required for reliable zonal isolation over the well's lifetime

Inventive Principle:

Principle #40Composite materials

2Reliability

If elastomeric swell packers are used, then sealing is achieved, but pieces of elastomer break off and contaminate the fluid stream

Engineering Contradiction:

Improvesealing integrityVSAvoidfluid contamination

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the material from elastomeric compound to cementitious material, which does not degrade or break into pieces like elastomers, thereby eliminating contamination of the fluid stream while maintaining sealing integrity

Inventive Principle:

Principle #35Parameter changes

3Reliability

If elastomeric swell packers are used, then sealing function is provided, but performance deteriorates in highly saline or alkaline environments

Engineering Contradiction:

Improvesealing performanceVSAvoidenvironmental degradation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material composition to cementitious materials that are chemically resistant to highly saline and alkaline environments, eliminating the degradation issues that plague elastomeric packers in such conditions

Inventive Principle:

Principle #35Parameter changes

4Quantity of substance

If a single packer is used, then capital cost is reduced, but the packer may need to handle both oil and water media requiring two different packer types

Engineering Contradiction:

Improvenumber of packersVSAvoidmedia compatibility

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal cementitious swell packer that can function effectively in both oil and water media, eliminating the need to carry and install different packer types for different media conditions

Inventive Principle:

Principle #6Universality (Multi-functionality)

5Reliability

If elastomeric swell packers are used, then initial sealing is achieved, but differential movement displaces the packer causing damage

Engineering Contradiction:

Improvesealing functionVSAvoidposition stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent employs a toroidal (doughnut-shaped) geometry for the cementitious packer that provides structural stability and resistance to displacement from differential movements, while maintaining effective sealing contact

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 cementitious swell packer offers a long-term solution with reduced failure rates, no contamination, improved performance in saline and alkaline conditions, and reduced need for multiple packers, enhancing well efficiency and reducing capital costs.

Implementation Method 1

when exposed to water, highly saline, highly alkaline media and otherwise contaminated aqueous solutions, including drilling completion fluids, will absorb the fluid, expand and set

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

the powder material located in the space between the first and second faces, which material is capable of setting to a rigid or semi-rigid solid

Methodology Applied

Scientific EffectSetting: Crystallisation

Data Source

PatentEP3906222B1Flexible composite

Publication Date: 2025.10.15 CONCRETE CANVAS TECH LTD

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AI summary

An expandable porous formwork, the formwork containing a dry cementitious powder fill that, when exposed to an aqueous media, will expand against the constraint of the formwork and set to form a solid, hard and coherent material, the formwork being porous to liquids but substantially impermeable to the powder fill.