Rental AHC Winch
Active Heave Compensation

Project reference List (2023/24 projects):

SGH Energy -Bass Strait - Various subsea operations including downline operations and span rectification
Beach Energy -West and Central Bass Strait - Decommissioning works –corrosion cap removal, debris cap installation, well head inspection, critical interface inspections, debris removal
Cooper Energy -Eastern Bass Strait - BaskerManta Gummy decommissioning works, including:installation of guideposts, installation of tree cap recovery tools, remove and refit Alpha II and Charlie II IWOCS bridging plates
SGH Energy -Bass Strait - Various subsea operations including downline operations and span rectification
Subsea7 (Santos) -Darwin - Mooring installation for Barossa
DOF Subsea (Woodside) –North WestShelf - Installation of a subsea flowline connector on Pyrenees
VOGA Offshore –North WestShelf - Subsea wellhead cap works

Rapid-mobilisation electric Active Heave Compensated winch system designed for subsea launch and recovery operations.

Rent and deploy on an existing vessel to increase capability

Thrust Maritime have developed and have available an AHC winch which is available for short, medium and long term rental. Typically it is deployed on short projects in order to upgrade existing vessel capability.

Fully integrated electric driven system - controls and drive system on a single skid for reliable rapid mobilisation.

Key Specifications

12t Safe Working Load (in-air)
- 18t dynamic load capacity
Design Seastate: 3.75m wave height with 8 second period
- Significantly exceeds typical ROV capabilities
450m rope as standard
Design standard: DNVGL-ST-0378
Low-Inertia Electric Drive System
Operating Modes: Manual, Constant Tension (CT), Active Heave Compensation (AHC) Modes, Hybrid AHC+CT
Fits in 20’ container - Simple domestic & international freight
Single skid installation - Fully integrated system with sea fastening for fast mobilisation. Integrated MRU no calibration required
Backup hydraulic recovery system
Drum shell can be changed for additional rope length

Video is from 2021 Sea trials

Further Details

Electric permanent magnet motor - Responsive ultra low-inertia motor for high line-speed and high energy efficiency
Adjustable level-wind system - Provides a wide range of off-lead angles, maximising deck layout options
Drum: Specially grooved, split-shell
Wire: 26mm as standard
Wire type: Rotation resistant, compacted, galvanized, internally lubricated with IWRC
Brakes: Dual independent fail-safe primary hydraulic band brake, secondary static gearbox disc brake

Environmental:

Operational Temperature: 0 to 45°C
Power Draw: 181kW (Rated), 280kW (Peak).
Typical supply is 2 off 350kVA genset or ship supply - providing backup supply through integrated changeover switch
Suitable for either 415V AC @ 50Hz or 440V AC @ 60Hz

Installation:

Simple calibration, only data required is:

x, y, z location of last sheave
x, y, z location of winch

Being a fully electric system (as opposed to hydraulic), there is no tuning required. Simple plug and play
Single lift onto deck – fully integrated system
Typically 6 weld down dogs
Designed for integration to deck without removal of t-bars
Can be installed in any direction – can use intermediate sheave to redirect
Can use existing sky hook (e.g. crane, a-frame or other high point)

Location, Storage and freight

Typically stored at location of last job. Available ex Melbourne
Storage in 20ft high cube side opening container for maximum weather protection
Easy freight, storage container is CSC certified for standard international intermodal freight