Guarded Casing Spacer Rollers for Obstacle-Tolerant Pipe Installation

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Solution Overview

Problem

Conventional casing spacers with roller assemblies often face difficulties in navigating obstacles within the casing pipe, which can hinder their ability to maintain the alignment and position of carrier pipes and may lead to damage.

Innovation Solution

The design incorporates roller assemblies protected by guards, featuring wheels made of electrically isolating glass-filled polymer materials, needle bearings, and a caster assembly with a gusset for enhanced durability and obstacle protection, allowing the rollers to effectively navigate the inner surface of the casing pipe.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If roller assemblies are added to casing spacers to facilitate pipe installation, then ease of operation is improved, but reliability deteriorates due to potential roller damage from obstacles

Engineering Contradiction:

Improveease of pipe installationVSAvoidroller durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

A guard structure is introduced as an intermediary element between the roller assembly and the obstacles on the casing pipe inner surface. The guard extends beyond the roller periphery to create a protective barrier that intercepts obstacles before they can contact and damage the roller, thus preserving roller reliability while maintaining the ease of operation benefit

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The guard structure provides beforehand protection by positioning itself in advance of the roller to absorb or deflect impacts from obstacles. This prior cushioning prevents direct contact between obstacles and the roller assembly, eliminating damage before it can occur

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Device complexity

If conventional casing spacers are used without protective guards, then device complexity is reduced, but object-generated harmful factors increase due to roller damage risks

Engineering Contradiction:

Improvespacer structure simplicityVSAvoidroller damage from obstacles

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The guard serves as a protective intermediary that absorbs the harmful impact from obstacles, preventing the generation of damage to the roller assembly. The guard structure is positioned to intercept obstacles before they can generate harmful forces on the roller

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

This configuration enables the rollers to overcome obstacles and maintain alignment, reducing the risk of damage and ensuring smoother installation and operation of carrier pipes within the casing pipe.

Implementation Method 1

wheels (23) made of electrically isolating glass-filled polymer materials

Methodology Applied

Scientific EffectElectrical insulation: Electrical Resistance

Implementation Method 2

casing spacers equipped with roller assemblies on the outside surface of the casing spacer

Methodology Applied

Scientific EffectRolling friction: Friction

Data Source

PatentUS11578823B1Casing spacer with roller assembly guards

Publication Date: 2023.02.14 DAIGLE DAMIAN

AI summary

A casing spacer that fits around a carrier pipe at various intervals along the length of the carrier pipe for the purpose of positioning the carrier pipe within a casing pipe. The casing spacer is equipped with roller assemblies on the outside surface of the casing spacer. The roller assemblies are protected by guards to help the roller assemblies avoid obstacles that may exist on the inner surface of the casing pipe.