Well Casing Bypass Flow Path for Fracture Screen-Out Relief

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Solution Overview

Problem

Hydraulic fracturing operations are hindered by screen-outs, where proppants or other materials block fractures, leading to increased pressure, unplanned work stoppages, and potential damage to downhole tools, necessitating costly and time-consuming remediation.

Innovation Solution

A fluid flow pathway is engineered into the casing or liner to bypass blockages, activated by predetermined pressure thresholds or remote actuation, allowing the blockage to be flushed away and maintaining well integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If proppants are added to the fracturing fluid to keep fractures open, then fracture integrity is improved, but screen-out risk increases due to proppant accumulation and blockages

Engineering Contradiction:

Improvefracture integrityVSAvoidscreen-out risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The fracturing system is divided into multiple isolated fracture zones separated by isolating media, with each zone having independent flow control. This segmentation allows localized management of proppant accumulation and screen-outs in specific zones without affecting the entire fracture system, enabling targeted remediation operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An intermediary flow pathway is provided through the isolating media that connects adjacent fracture zones. This intermediary channel allows fluid and proppant to be redirected from a blocked zone to an adjacent open zone, serving as a mediator that prevents complete screen-out while maintaining fracture integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If fracturing pressure is increased to maintain pump rates, then fracture stimulation is improved, but screen-out risk increases due to reduced pump rates making proppants easier to trap

Engineering Contradiction:

Improvefracture stimulationVSAvoidscreen-out risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts flow distribution between fracture zones based on real-time pressure monitoring. When a zone experiences increasing pressure indicative of screen-out, the system dynamically redirects flow to adjacent zones through the isolating media, maintaining overall productivity while preventing complete blockage.

Inventive Principle:

Principle #15Dynamics

3Reliability

If remedial operations are performed to clear blockages, then screen-out is resolved, but operational time and costs increase due to unplanned work stoppages

Engineering Contradiction:

Improvescreen-out resolutionVSAvoidoperational downtime

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The isolating media and intermediary flow pathways are pre-configured during the fracturing operation to enable rapid response to screen-outs. When a blockage is detected, the system can immediately redirect flow through the pre-established pathways to adjacent zones, eliminating the need for time-consuming remedial operations and minimizing operational downtime.

Inventive Principle:

Principle #10Preliminary action

4Ease of operation

If downhole tools are deployed to monitor and control the fracturing process, then operational control is improved, but damage risk increases due to excessive downhole pressure during screen-outs

Engineering Contradiction:

Improveoperational controlVSAvoidtool damage risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The isolating media acts as a protective intermediary between the high-pressure fracture zone and the downhole tools. When screen-out conditions cause excessive pressure, the isolating media provides an alternative flow path that reduces pressure transmission to the tools while maintaining operational control through the monitoring and control capabilities of the deployed tools.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables continuous stimulation and production by automatically or remotely opening a bypass flow path to clear blockages, reducing operational costs and minimizing damage to downhole tools.

Implementation Method 1

injecting a high-pressure fluid mixture into an isolated zone of a wellbore to create fractures in the rock

Methodology Applied

Scientific EffectHigh-pressure fluid flow: Pressure Gradient

Data Source

PatentUS12486746B2Screen-out flow device and process

Publication Date: 2025.12.02 BROOKS MATTHEW JOSEPH

AI summary

A process for generating fluid flow out of a first fracture zone of a well including a liner or casing is described. The process is engaged to remove a screen-out condition and/or to protect downhole tools deployed in the well and includes the steps of providing the casing with a fluid flow pathway extending from a first fracture zone to an adjacent fracture zone downhole from the first fracture zone. The fluid flow pathway becomes operable when a pre-determined parameter is reached as a result of the screen-out condition. A device for providing the fluid flow pathway is also described.