Downhole Setting Tool Exhaust Diffuser for Combustion Damage Control

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Solution Overview

Problem

The combustion process in setting tools for subterranean wellbores causes damage to the tool surfaces due to high-velocity combustion products, leading to corrosion and the formation of hard mineral deposits that are difficult to remove, thereby shortening the operational lifespan of the tools.

Innovation Solution

Incorporation of an exhaust diffuser in the setting tool to redirect and reduce the velocity of combustion products, minimizing surface contact and trapping debris, which is designed to be replaceable and made of corrosion-resistant materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the combustible element is used to power the setting tool, then the setting tool can drive the operable elements of the sealing device, but the combustion process generates high-velocity combustion products that damage the setting tool surfaces and form hard mineral deposits

Engineering Contradiction:

Improvepower of setting toolVSAvoiddamage to setting tool surfaces

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 setting tool surfaces. The diffuser redirects and dissipates the high-velocity combustion products, preventing direct contact with the tool surfaces while still allowing the combustion process to power the setting tool effectively.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful exhaust products are extracted from the combustion chamber and directed through a separate exhaust path using the diffuser, separating the useful work (powering the setting tool) from the harmful effects (surface damage and mineral deposition).

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the combustion process is used to drive the sealing device, then the sealing device can be set effectively, but hard mineral deposits form on the setting tool that are difficult to remove

Engineering Contradiction:

Improvesetting of sealing deviceVSAvoidcleaning of mineral deposits

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The exhaust diffuser serves as a protective intermediary that intercepts combustion products before they can deposit on the setting tool surfaces, thereby maintaining ease of cleaning while ensuring reliable sealing device setting.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The exhaust diffuser converts the potentially harmful high-velocity combustion products into a beneficial controlled exhaust flow that exits through designated paths, transforming a surface-damaging force into a controlled emission system that protects the tool surfaces.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If the high-velocity combustion products are allowed to flow freely, then the combustion process is efficient, but the combustion products peel protective coatings and damage surfaces of the setting tool

Engineering Contradiction:

Improveefficiency of combustion processVSAvoidintegrity of protective coatings

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The exhaust diffuser acts as a protective intermediary structure that intercepts and redirects high-velocity combustion products, preventing them from peeling protective coatings while still allowing efficient combustion to occur in the chamber.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The exhaust diffuser provides beforehand protection by positioning itself between the combustion chamber and the protective coatings, cushioning against the impact of high-velocity combustion products before they can cause damage.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 reduces abrasive damage and mineral deposition, extending the tool's operational life and simplifying cleaning and maintenance, ensuring efficient and reliable wellbore operations.

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 EffectFluid flow redirection:

Implementation Method 2

exhaust diffuser to redirect and reduce the velocity of combustion products, minimizing surface contact

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

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

Methodology Applied

Scientific EffectCombustion: Combustion

Data Source

PatentUS20250376903A1Downhole setting tool with exhaust diffuser

Publication Date: 2025.12.11 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.