Anti-Corkscrewing Casing Spacer Roller Mechanism

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Solution Overview

Problem

Existing casing spacers do not effectively prevent carrier pipes from twisting or corkscrewing during installation into casing pipes, and secondary methods like welding rails are costly and impractical, especially for small sizes, while also failing to provide necessary electrical isolation.

Innovation Solution

The development of anti-corkscrewing casing spacers equipped with roller assemblies, including wheels made of electrically isolating materials, thrust bearings, and spring mechanisms to counteract twisting forces and maintain pipe alignment, along with angled wheel attachments to control pipe direction and prevent corkscrewing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional casing spacers are used to support carrier pipes, then the carrier pipes are positioned and electrically isolated, but the carrier pipes twist or corkscrew during installation

Engineering Contradiction:

Improvepipe alignment stabilityVSAvoidcorkscrewing twisting

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces roller assemblies as intermediary elements between the carrier pipe and casing spacer. These rollers act as mediators that convert harmful sliding friction and twisting forces into beneficial rolling motion, preventing corkscrewing while maintaining pipe support and alignment throughout the installation process

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the conventional static friction-based support system with a dynamic rolling system. By substituting sliding contact with rolling contact through the roller assemblies, the system eliminates the mechanism that causes corkscrewing during pipe installation while maintaining effective support

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If welding rails are used to prevent corkscrewing, then twisting is limited, but installation costs and labor increase significantly

Engineering Contradiction:

Improvepipe alignment stabilityVSAvoidinstallation cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs roller assemblies that are relatively simple, inexpensive components compared to welded rails. These rollers are designed as temporary installation aids that fulfill their function during pipe installation and can be removed or left in place without requiring expensive welding operations or complex fabrication

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent extracts the anti-corkscrewing function from the permanent casing spacer structure and implements it through separate, removable roller assemblies. This separation allows the anti-corkscrewing mechanism to be applied only during installation without requiring permanent modifications like welding rails to the casing or carrier pipes

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If welding rails are used to prevent corkscrewing, then twisting is limited, but electrical isolation between carrier pipe and casing pipe is not provided

Engineering Contradiction:

Improvepipe alignment stabilityVSAvoidgalvanic corrosion

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the casing spacer into electrically isolated sections that contact the carrier pipe at discrete points rather than providing continuous metallic contact. This segmentation breaks potential galvanic corrosion paths between dissimilar metals while still providing adequate support and alignment stability during installation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The roller assemblies serve as intermediary elements that provide mechanical support and anti-corkscrewing functionality without creating continuous electrical contact between the carrier pipe and casing pipe. This intermediary approach simultaneously addresses both alignment stability and electrical isolation requirements

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 anti-corkscrewing casing spacers effectively prevent twisting and corkscrewing of carrier pipes during installation, ensuring proper alignment and electrical isolation, reducing installation costs and labor, and maintaining pipe stability within casing pipes.

Implementation Method 1

roller assemblies, including wheels made of electrically isolating materials

Methodology Applied

Scientific EffectRolling friction: Friction

Implementation Method 2

thrust bearings

Methodology Applied

Scientific EffectBall bearing: Ball Bearing

Implementation Method 3

spring mechanisms to counteract twisting forces

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 4

wheels made of electrically isolating materials

Methodology Applied

Scientific EffectElectrical insulation: Electrical Resistance

Data Source

PatentUS10627014B1Anti-corkscrewing casing spacer

Publication Date: 2020.04.21 DAIGLE DAMIAN

AI summary

A casing spacer which allows for the positioning of a carrier pipe or set of carrier pipes in a desirable location inside a casing pipe.