AES delivers certified handling systems and projects to support Deep Diving operations throughout the overboarding launch and recovery process.
Mobilized either sides of a Diving Support Vessel (DSV) or on a Moon pool, the system is certified with 30,000lb SWL, capable of lifting, overboarding and recovering a manned Diving Bell with a full laden weight of 22,000lb (10,000kg).
Designs and fabrication to conform with the rules of ABS Lifting Appliances Guide 2014 and ABS Underwater Vehicles, Systems & Hyperbaric Facilities 2014.
SYSTEM DESCRIPTION
The A- Frame configuration is designed out of a box section construction manufactured in three sections, two Leg sections and a top Crossbeam and boomed in and out through the use of main luffing cylinders which are hydraulically operated.
System includes Main Bell Wire Winch, Guide Wire Winch and Umbilical Wire Winch as part of the ancillary equipment package.
Bell WIRE WINCH:
Bell Wire Winch is used for normal launching and recovering of the Diving Bell and is typically mounted in a purpose built frame assembly located in close proximity to the Diving Bell System. A light variable tension feature is included in the designs for in-water lowering and raising of the bell to prevent undue snatch loading and slack rope from developing.
Guide WIRE WINCH:
The Guide Wire Winch is used for launching and recovering the Clump Weight. The Clump weight Winch unit will typically be mounted local to the Diving Bell System in a similar purpose built frame as the bell winch.
The guide wire winch is capable of recovery of Bell and Clump Weight to the surface, provided as a secondary means of subsurface recovery of tethered manned underwater unit.
As an additional extended capability, AES Handling System is capable of simultaneously handling and recovery of Clump Weight plus Wire Rope and Diving Bell in air weight as a secondary means of recovery if the Deck Crane is out of reach.
UMBILICAL WIRE WINCH:
Umbilical Winch system to provide a method for deploying and recovery of an Umbilical Cable with Spooling guide pads that assist with the layering of the Umbilical Cable onto the drum.
TOP LEVEL SPECIFICATION:
While most handling
projects are custom designed and built to suit Customer’s system requirements,
deck layout and operating conditions, mainly delivered AES system features for
Diving Operation Handling Systems are as follows.
·
A-Frame SWL: 30,000lb (13,600kg)
·
Bell: 22000lb (10,000kg)
·
Clump weight: 5000lb (2000kg)
·
Typical Operating Window (can be customized to
suit deck layout)
o
Inboard angle of 30 degrees
o
Outboard angle of 60 degrees
·
Roller Sheaves for Umbilical Line
·
Telescopic Bell Docking Head
·
Swing Frame
·
Docking Head with Dampening Shock Absorbers
·
Bullet Latch System
·
LARS Control Station with hands on controls
·
An optional PLC based control system
·
Diving Bell Winch (22,000lb SWL)
· Guide Wire Winch (30,000lb SWL)
· Umbilical Winch (3000LB SWL)
DESIGN LOADS:
·
Static Design Loads (simultaneous accelerations)
o
1 g Transverse
o
1 g Longitudinal
o
2 g Vertical
·
Dynamic Drive Loads
o
0.25 g Transverse
o
0.25 g Longitudinal
o
1.25 g Vertical
· Functional Load Test
OPERATIONAL FEATURES INCLUDED BUT NOT LIMITED TO :
1.
Support guide winch running rigging and loads
from clump weight (and Bell for emergency recovery)
2.
Positively control Bell during inboard
interfacing with TUP (direct latching and powered telescopic action)
3.
Positively support and control Bell during
overboarding (in/out) operations (damped swing frame, positive latching)
4.
Support the Bell winch running rigging and load
from Bell during normal operation
5.
Support Umbilical running rigging and loads
during normal operations
6.
Umbilical Winch system to provide a method for
deploying and recovery of an Umbilical Cable.
7.
Guide wire winch to support Launch & Recover
of the Clump Weight down to 430fsw and emergency recovery of Bell.
8. Bell winch to support Launch & Recover of the Diving Bell down to 1000fsw