ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE HUISMAN - EQUIPMENT 1. - - PowerPoint PPT Presentation

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ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE HUISMAN - EQUIPMENT 1. - - PowerPoint PPT Presentation

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HUISMAN EQUIPMENT IMCA CONFERENCE AMSTERDAM 27-09-2018 ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE HUISMAN - EQUIPMENT 1. INTRODUCTION Table of content 1. Introduction fiber rope 2. Fiber rope for subsea installation 3. Huisman subsea

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ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

HUISMAN EQUIPMENT IMCA CONFERENCE AMSTERDAM 27-09-2018

HUISMAN - EQUIPMENT

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Table of content 1. Introduction fiber rope 2. Fiber rope for subsea installation 3. Huisman subsea crane with fiber rope 4. Huisman fiber rope research 5. Summary

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

  • 1. INTRODUCTION

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  • 1. INTRODUCTION FIBER ROPE

More than 10 years fiber rope development Huisman

  • Research
  • Spooling system
  • Heat development
  • Rope lifetime
  • Subsea block stability
  • Rope selection
  • End connection
  • Rope monitoring
  • Applications
  • Round slings
  • Stays
  • Tuggers
  • Subsea installation system

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  • 1. INTRODUCTION FIBER ROPE

Stays

  • Stays for super flyjib in 2012 to reduce weight and increase handling speed
  • Fibremax with Teijin Technora fibre

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  • 1. INTRODUCTION FIBER ROPE

Fiber rope on crane tuggers

  • Increased safety:
  • Lighter
  • Less stiffness
  • Easier handling
  • Increased handling speed:
  • Lighter
  • Lower bending stiffness
  • Torsion free
  • Maintenance, inspection and transport:
  • Not sensitive to corrosion
  • No need for lubrication
  • Easy inspection
  • On-board in-line splicing possible

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE 5

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  • 1. INTRODUCTION FIBER ROPE

Benefits fiber rope compared to steel wire rope

  • Increased subsea capacity due to buoyancy of the rope
  • Not sensitive to corrosion
  • No lubrication required
  • Can be inspected internally
  • Torque free
  • Lower weight to ease handling and transport
  • Repair of mid rope sections by splicing
  • Lower (axial) stiffness

Disadvantages fiber rope compared to steel wire rope

  • Maximum operational temperature is 70oC (HMPE)
  • Lower bending lifetime
  • More sensitive to abrasion, sharp edges
  • Low friction (e.g. traction winch systems)
  • Low radial stiffness and lack of shape (e.g. cutting-in and-stick slip on winch)

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  • 2. FIBER ROPE FOR SUBSEA INSTALLATION

Subsea capacity fiber and steel rope

  • Deploy 150mt in air at 4km of water depth
  • 350mt crane using steel wire rope
  • 150mt crane using fiber rope
  • Fiber rope results in
  • reduced power consumption during AHC
  • a smaller crane
  • smaller vessel size

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  • 2. FIBER ROPE FOR SUBSEA INSTALLATION

Torque properties fiber versus steel rope

  • Steel wire rope will rotate when loaded
  • Protrusion of the rope
  • Lower block instability
  • Fiber rope is torque neutral
  • Allows multi-fall operation

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

Torque neutral fiber rope

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Low-spin steel wire rope

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  • 3. HUISMAN FIBER ROPE CRANE

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE 9

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  • 3. HUISMAN FIBER ROPE CRANE

Huisman design philosophy

  • Treat fiber rope as an asset and ensure operation is safe and reliable

Limit fiber rope temperature during heave compensation

  • Maximum operational temperature of the rope is 70oC (HMPE)
  • Rope temperature increases significantly when heave compensated
  • Rope cooling will be part of the safety system

Fiber rope is treated as an asset

  • Maximize Lifetime of the valuable fiber rope
  • Bending lifetime is halve that of steel wire rope
  • A reduced operational rope temperature and smaller diameter increases the rope lifetime

Avoid heave compensation on the fiber rope

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  • 3. HUISMAN FIBER ROPE CRANE

Hybrid fiber rope crane

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

Features

  • Rope transfer to improve lifetime of fiber and steel rope
  • Single line operation with steel and fiber rope

No heave compensation

  • n fiber rope winch

Heave compensation

  • n steel wire rope winch

Sheave not Rotating during AHC

Sheave rotating but water cooled

Sheave Rotating during AHC Rope spacer for block stability during subsea

  • peration

Patent pending

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Single line operation with steel wire rope to increase lifetime fiber rope

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  • 3. HUISMAN FIBER ROPE CRANE

Hybrid fiber rope crane

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

Fiber rope Steel wire rope Connection fiber and wire rope Steel wire rope winch Fiber rope winch with cover for UV protection Dual fall block Slip-less traction winch (with cover) Storage winch Spooler Patent pending

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  • 3. HUISMAN FIBER ROPE CRANE

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

Fiber and steel wire rope have their unique benefits

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Topic Fiber Rope Steel Wire Rope Deepwater lowering + + Remaining capacity at deepwater + +/- Corrosion resistance +

  • Inspection

+ +/- In-line splice +

  • Torque free

+ +/- Heave compensation / heat resistance

  • +

Price of rope (CAPEX & OPEX)

  • +

Rope fatigue lifetime

  • +

Resistance to sharp corners

  • +

Proven technology

  • +
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  • 3. HUISMAN FIBER ROPE CRANE

Topic Fiber Rope Steel Wire Rope Huisman Hybrid Deepwater lowering + + + Remaining capacity at deepwater + +/- + Corrosion resistance +

  • +

Inspection + +/- + In-line splice +

  • +

Torque free + +/- + Heave compensation / heat resistance

  • +

+ Price of rope (CAPEX & OPEX)

  • +

+ Rope fatigue lifetime

  • +

+ Resistance to sharp corners

  • +

+/- Proven technology

  • +

+

ULTRA-DEEP SUBSEA CRANE WITH FIBER ROPE

Dual fall crane combines the benefits of fiber and steel wire rope

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  • 4. FIBER ROPE RESEARCH

Huisman research fiber rope for subsea installation

  • Huisman started research in fiber rope in 2006
  • Varying test equipment developed for testing fiber rope
  • Integration of the fiber rope into the crane system to manage rope temperature and

lifetime

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  • 4. FIBER ROPE RESEARCH

Hoist system - multi-layer spooling of a fiber rope

  • Tension variations results in:
  • cutting-in
  • stick slip resulting in shock loading
  • Special spooling techniques are very sensitive to errors
  • Fiber rope lifetime on drum with high tension is lower than steel
  • Jacketed rope does not improve spooling behavior with a direct winch

Storage winch with constant tension is the most robust solution

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Traction winch design

  • Heat due to slip is negligible if traction winch is designed for the fiber rope
  • Groove design depends on rope properties
  • Torque is controlled per drum
  • The drums function as a heat sink for the fiber rope and has a much larger

cooling capacity than air Traction winch optimized for fiber rope based on standard and proven design

  • 4. FIBER ROPE RESEARCH

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  • 4. FIBER ROPE RESEARCH

Fiber rope has a limited operating temperature

  • Maximum operational rope temperature of HMPE is 70oC
  • At 70oC the fiber rope has lost more than 20% of its strength
  • Bending lifetime of a fiber rope reduces a factor of 2 per 20oC increase
  • Limited margin with an environmental temperature of 45oC

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Rope failure due to overheating

Source: Samson Ropes

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Measurement of rope temperature

  • Rope core temperature can be 20oC higher than exterior rope temperature during heave compensation
  • Inaccuracy temperature sensors is +-5oC
  • Location temperature sensor is not necessarily the hottest spot on the rope’s exterior

Heave compensation using fiber rope not preferred

  • 4. FIBER ROPE RESEARCH

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Limits and accuracies Temperature Temperature limit (HMPE) 70oC Sensor inaccuracy +-5oC Temperature difference with rope core 20oC Inaccuracy location of measurement +-5oC Temperature limit measurement by sensor 40oC

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Rope temperature control

  • Rope temperature easily exceeds 70oC temperature limit during heave compensation
  • Significant active cooling measures required which will be part of the crane’s safety system
  • 4. FIBER ROPE RESEARCH

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  • 4. FIBER ROPE RESEARCH

Block rotation with steel wire rope

  • Steel wire rope will induce torque when loaded
  • Twist in the rope will generate a torque on the

lower block

  • Sea current on the load and block

Rope spacer field proven for steel wire rope

  • Fiber rope is torque neutral due to its braided

construction

  • Easier to prevent twisting for fiber rope

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  • 4. FIBER ROPE RESEARCH

Rope usage monitoring

  • Determines the consumed lifetime of the steel and fiber rope

based on the actual usage

  • Optimization of the steel and fiber rope lifetime using auto

transfer 3D Rope vision system (patent pending)

  • Reconstruction of the rope section along the complete rope
  • Measurement of the rope profile diameter, fluffiness, etc.

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SUMMARY

  • Subsea operation with fiber rope
  • Full crane capacity at water depth
  • Corrosion and lubrication free fiber rope
  • In-line repairs of the rope for increases lifetime or increased rope length
  • Slip-less traction and storage winch
  • No risk of cutting-in of the fiber rope
  • No-stick slip effects on winch during large tension variations
  • Robust spooling pattern
  • Limited heat development
  • Improved rope lifetime
  • Storage winch and sheave will be covered for UV protection
  • Non-jacketed rope
  • Internal and external visual inspection possible
  • Higher strength
  • Easier to splice
  • No relative motion between jacket and load bearing material

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SUMMARY

  • Heave compensation on steel wire rope winch
  • No heat build-up in fiber rope
  • No active cooling required and is no part of safety system
  • Significant increase lifetime of valuable fiber rope
  • Rope lifetime optimized by rope transfer steel wire and fiber rope
  • Dual fall operation
  • Torsion free fiber rope
  • Smaller rope diameter increasing lifetime, easing handling, reducing

cost

  • Single line fiber rope to double the water depth (without AHC)

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QUESTIONS

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