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Method for evaluating temperatures in active heave compensation ropes

A roped, active technology that can be used in thermometers that give differential values, earthwork drilling, special data processing applications, etc., to solve problems such as not focusing on specific windows of interest

Inactive Publication Date: 2019-09-27
REDAELLI TECNA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the known methods focus on studying a specific window of interest regarding the relevant mechanisms and temperatures leading to the generation of heat

Method used

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  • Method for evaluating temperatures in active heave compensation ropes
  • Method for evaluating temperatures in active heave compensation ropes
  • Method for evaluating temperatures in active heave compensation ropes

Examples

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Embodiment Construction

[0016] A method for evaluating the temperature in an active heave compensation rope has been defined in relation to a mechanical model and a thermal model. Calibration of the model has been carried out through extensive experimental campaigns. Set-up tests have been performed combining the various inputs (load, speed, D / d) with the rope to determine the internal and external temperature change (ΔT) of the wire rope relative to the ambient temperature.

[0017] Referring now to the drawings and in particular to figure 1 , the method S100 for evaluating the temperature in an active heave compensation rope includes the following steps in chronological order:

[0018] - S110 describes the geometry of the wire rope as a composite structure obtained by assembling helical components in layers, the layers being the wire, the rope and the rope itself;

[0019] - S120 uses a mechanical model of the rope showing the material properties of each wire under the assumption of linear elasti...

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Abstract

The invention relates to a method for evaluating temperatures in active heave compensation ropes, comprising the following steps: describing the geometry of ropes as composite structures obtained through assemblies of helical components in hierarchical levels: wires, strands and the rope itself; using a mechanical model of the strand that represents the material properties of each wire, under the assumption of linear elastic behavior; using a mechanical model of the rope that represents the combined action of tensile loads and imposed bending curvature; using a thermal model for the evaluation of the rope temperature increase (Ts) with respect to the ambient temperature, the thermal model comprising two main dissipation sources: the friction between strands or rope and a sheave and the friction between wires or between strands and compare rope temperature increase (Ts) obtained by the thermal model with a value of a predetermined temperature threshold.

Description

technical field [0001] The invention relates to a method for evaluating the temperature of an active heave compensation rope. In particular, the invention measures the temperature due to the rope moving back and forth on the pulley at the operating speed and analyzes the result of applying a thermal field on the wire. Background technique [0002] It is well known that wire ropes or simply ropes are widely used in subsea installations, however in recent years the demand for wire ropes capable of withstanding more severe working conditions has increased dramatically. Users require larger and longer wire ropes that can withstand heavier jobs and loads. All of this has forced wire rope manufacturers to deal with the need to be better, bigger and stronger to handle ever greater dynamic loads and more extreme bending cycles. Active Heave Compensation (AHC) is one of the most influential factors in the life expectancy of wire ropes in scrap and recycling applications. The AHC i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/09G01K3/10E21B19/00
CPCE21B19/006G01K3/10G06F17/12E21B47/07G06F30/20G06F2101/02G06F2101/04G06F2111/10
Inventor F·弗蒂M·梅勒杜L·马蒂内利
Owner REDAELLI TECNA
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