Downhole Setting Tool Exhaust Diffuser for Surface Protection

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Solution Overview

Problem

The combustion process in setting tools for subterranean wellbores generates high-velocity combustion products that can damage tool surfaces, form hard mineral deposits, and require time-consuming cleaning, reducing operational lifespan.

Innovation Solution

Incorporating an exhaust diffuser in the setting tool to redirect combustion products, reducing their velocity and preventing damage to tool components, and facilitating easier cleaning by trapping debris.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a combustible element is used to power the setting tool, then the sealing device can be shifted from initial to set configuration, but high-velocity combustion products damage tool surfaces and form hard mineral deposits

Engineering Contradiction:

Improvepower to shift sealing deviceVSAvoidsurface damage and mineral deposits

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

An exhaust diffuser is introduced as an intermediary component between the combustion chamber and the tool surfaces. The diffuser redirects combustion products through a controlled path, reducing their velocity and preventing direct impact on tool surfaces. This mediator allows the combustion process to power the tool while protecting surfaces from damage and mineral deposit formation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If combustion products are allowed to flow freely, then the setting tool operates effectively, but cleaning becomes time-consuming and costly

Engineering Contradiction:

Improvesetting operation efficiencyVSAvoidcleaning time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The exhaust diffuser serves as a protective intermediary that channels combustion products away from critical tool surfaces. By controlling the flow path and reducing velocity, the diffuser minimizes the accumulation of hard mineral deposits, thereby reducing the time and resources required for cleaning between operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the setting tool is used repeatedly, then operational efficiency increases, but surface damage accumulates and reduces tool lifespan

Engineering Contradiction:

Improverepeated operation capabilityVSAvoidtool operational lifespan

Core Design Contradiction:

ProductivityVSDuration of action of stationary object

Solution Approach 1:

The exhaust diffuser acts as a protective barrier that redirects combustion products, preventing direct exposure of tool surfaces to high-velocity flames and debris. This intermediary protection reduces cumulative surface damage, allowing the setting tool to maintain its operational lifespan across multiple uses.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Loss of time

If combustion products directly contact tool surfaces, then the setting process completes quickly, but protective coatings are peeled and surfaces damaged

Engineering Contradiction:

Improvesetting operation timeVSAvoidprotective coating integrity

Core Design Contradiction:

Loss of timeVSStrength

Solution Approach 1:

The exhaust diffuser introduces a controlled flow path that acts as an intermediary between combustion products and tool surfaces. It redirects the combustion flow to maintain quick setting operations while preventing the peeling of protective coatings and damage to surfaces through reduced velocity and controlled exposure.

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

The exhaust diffuser minimizes surface damage and extends the operational life of the setting tool by protecting critical components and simplifying the cleaning process.

Implementation Method 1

an exhaust diffuser configured to redirect a flow of combustion products generated in response to ignition of the combustible element

Methodology Applied

Scientific EffectFlow redirection and velocity reduction: Diffusion

Implementation Method 2

ignition of the combustible element... The combustion process within the setting tool undesirably results in dramatic heating of the setting tool and wellbore fluids within the vicinity

Methodology Applied

Scientific EffectCombustion: Combustion

Data Source

PatentUS12410668B2Downhole setting tool with exhaust diffuser

Publication Date: 2025.09.09 G&H DIVERSIFIED MFG LP

AI summary

A method for redressing a setting tool for actuating a plug in a subterranean wellbore includes recovering the setting tool from the wellbore, the setting tool including a housing with a throughbore therein, a piston arranged for axial movement within the throughbore, a combustible element, and an exhaust diffuser configured to redirect a flow of combustion products generated in response to ignition of the combustible element, removing the piston from the throughbore of the housing, removing the exhaust diffuser from the housing, cleaning the piston and the housing, and reinstalling the piston into the housing of the setting tool with at least one of the exhaust diffuser and a replacement exhaust diffuser for subsequent use of the setting tool in a wellbore.