Seismic Cable Layering for Extreme Temperature Integrity

Solution Overview

Problem

Existing electrical cables lack effective solutions for maintaining integrity across a wide temperature range and are prone to water infiltration and damage from animal bites, especially in arctic and tropical environments.

Innovation Solution

A cable design featuring a polymeric inner and outer layer with an intermediate tie layer, a filler rod with elastomeric material, and optional shield and strength members, utilizing materials like polyamide, fluoropolymers, and Kevlar to create a durable, water-resistant, and temperature-stable cable assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional cable designs are used, then manufacturing cost is reduced, but the cable cannot maintain integrity across wide temperature ranges and is prone to water infiltration and animal damage

Engineering Contradiction:

Improvecable integrityVSAvoidcable structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cable is divided into multiple functional layers including inner polymeric layer, intermediate tie layer, outer polymeric layer, shield layer, and filler rods. Each layer performs a specific function: the inner layer provides insulation, the tie layer binds layers together, the outer layer maintains integrity in extreme temperatures, the shield layer prevents water infiltration, and the filler rods provide structural support and prevent animal bites. This segmentation allows each component to be optimized for its specific function while working together as a integrated system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cable employs composite material construction by combining different polymeric materials with distinct properties. The inner layer uses materials like polyolefin or fluoropolymer for electrical insulation, the outer layer uses temperature-resistant materials like polyamide or thermoplastic polyurethane, and the tie layer uses modified polymers to bond the layers together. This composite approach enables the cable to simultaneously achieve electrical insulation, temperature resistance, and structural integrity.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If conventional single-layer polymeric coating is used, then manufacturing is simpler, but the cable is vulnerable to water infiltration and cannot resist animal bites

Engineering Contradiction:

Improvewater infiltration and animal damage resistanceVSAvoidcable assembly process

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The protective structure is segmented into multiple functional layers: the outer polymeric layer provides the first line of defense against environmental factors, the shield layer specifically addresses water infiltration through interlocking metallic tape or metallic mesh, and the filler rods provide structural reinforcement against animal bites. This segmentation allows each layer to target specific harmful factors while maintaining a systematic manufacturing process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filler rods are pre-positioned within the cable structure before the outer layers are applied. These rods provide immediate structural reinforcement and void filling that prevents water infiltration paths and deters animal bites from the outset, rather than requiring additional protective measures to be added later.

Inventive Principle:

Principle #10Preliminary action

3Temperature

If the cable uses a wide temperature range material specification, then operational reliability in extreme environments is improved, but material selection and manufacturing precision requirements increase

Engineering Contradiction:

Improveoperational temperature rangeVSAvoidlayer bonding and material selection

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The cable design specifies polymeric materials with broad operational temperature ranges. The inner layer materials (polyolefin, fluoropolymer) maintain their properties from -60°C to 80°C, while the outer layer materials (polyamide, thermoplastic polyurethane) are selected for their temperature resistance. The intermediate tie layer materials are specifically chosen to remain flexible and adhesive across this wide temperature range, ensuring continuous bonding between layers despite thermal expansion and contraction.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The cable employs composite material construction by combining different polymeric materials with distinct properties. The inner layer uses materials like polyolefin or fluoropolymer for electrical insulation, the outer layer uses temperature-resistant materials like polyamide or thermoplastic polyurethane, and the tie layer uses modified polymers to bond the layers together. This composite approach enables the cable to simultaneously achieve electrical insulation, temperature resistance, and structural integrity.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS7915532B2Enhanced electrical seismic land cable

Publication Date: 2011.03.29 WESTERNGECO LLC

AI summary

An electrical cable having a polymeric inner layer enclosing a cable core, and a polymeric outer layer enclosing the cable core and the inner layer. The outer layer operable to maintain integrity of the cable within a predetermined temperature range.