|
|
Task
|
Location
|
Client
|
Subsea Material
|
Water Depth
|
|
New Installations
|
|
|
|
|
|
|
Post Trenching 20” and 24” pipelines
|
Mexico
|
Horizon/Pemex
|
Firm Clay
|
80m
|
|
|
Post Trenching 36” and 24” pipelines
|
Mexico
|
Oceanografia
|
Firm Clay
|
35m
|
|
|
Post Trenching 20” pipeline
|
Mexico
|
Oceanografia
|
Firm Clay
|
40m
|
|
|
Post Trenching 12” pipelines
|
Venezuela
|
Z&P/ConocoPhillips
|
Soft Mud
|
10m
|
|
|
Post Trenching 36” pipeline
|
Mexico
|
Oceanografia/Pemex
|
Firm Clay
|
40m
|
|
|
Post Trenching 20” pipeline
|
U.A.E.
|
COMACOE
|
Sandy Silt
|
5-21m
|
|
|
Post Trenching 16” pipeline
|
Mexico
|
Oceanografia
|
Firm Clay
|
50m
|
|
|
Post Trenching 12” pipeline
|
U.S. G.O.M
|
Chevron
|
Soft Clay
|
40m
|
|
|
Pipeline Crossings
|
Saudi Arabia
|
Global Industries
|
Clayey Sand
|
9-36m
|
|
|
Post Trenching 12” pipelines
|
Venezuela
|
Z&P/ConocoPhilips
|
Soft Mud
|
5-25m
|
|
|
Post Trenching 16” pipelines
|
Mexico
|
Condux/Pemex
|
Firm Clay
|
33m
|
|
|
Post Trenching 8” pipelines
|
U.S. G.O.M
|
Con-Dive/Prime Offshore
|
Soft Clay
|
40m
|
|
|
Post Trenching 16” pipelines
|
Mexico
|
Condux/Pemex
|
Firm Clay
|
33m
|
|
|
Post Trenching 8” pipelines
|
U.S. G.O.M
|
Con-Dive/Prime Offshore
|
Soft Clay
|
40m
|
|
|
PreSweeping Sandwaves & 20” pipeline trenching
|
India
|
Global Ind./British Gas
|
Soft Sand and Clay
|
25-40m
|
|
|
Post Trenching 24’ pipeline
|
Mexico
|
Condux/Pemex
|
Firm Clay
|
50m
|
|
|
Pipeline Post Trenching
|
Mexico
|
Condux/Pemex
|
Firm Clay
|
50m
|
|
|
Trenching 36” & 12” pipeline crossing
|
Mexico
|
Global Ind./Pemex
|
Sand and Mud
|
50m
|
|
|
Pipeline Trenching
|
U.S. G.O.M
|
Prime Offshore
|
Sand
|
46m
|
|
|
Post Trenching 12”, 24” & 36” pipelines
|
Mexico
|
Global Ind./Pemex
|
Sand and Clay
|
66m
|
|
|
Post Trenching 8” & 10” pipelines
|
U.S. G.O.M
|
Global Ind./Chevron
|
Soft Mud
|
65m
|
|
|
Post Trenching 36” Pipeline
|
Mexico
|
Oceanografia
|
Soft Mud
|
80m
|
|
|
Post Trenching 12” pipeline
|
U.S. G.O.M
|
Global Ind./Chevron
|
Soft Mud
|
70m
|
|
|
Spud Can Excavation
|
Vietnam
|
KNOC
|
Sand
|
5m
|
|
|
Pipeline Trenching
|
Mexico
|
Horizon
|
Soft Clay
|
60m
|
|
|
Pipeline Trenching
|
U.S. G.O.M
|
Global Ind/Devon
|
Soft Clay
|
40m
|
|
|
Pipeline Trenching
|
U.S. G.O.M
|
Global Ind/Apache
|
Firm Clay
|
25m
|
|
|
Post Trenching 24” pipelines
|
Mexico
|
Horizon
|
Soft Clay
|
80m
|
|
|
Post Trenching pipeline
|
Mexico
|
Condux/Pemex
|
Soft Clay
|
45m-65m
|
|
|
Post Trenching pipeline
|
Mexico
|
Condux/Pemex
|
Soft Clay
|
45-65m
|
|
|
Post Trenching 12” pipeline
|
U.S. G.O.M
|
Global Ind./ElPaso
|
Soft Clay
|
15m
|
|
|
Pipeline Trenching
|
Trinidad
|
Acergy
|
Soft Mud
|
75m
|
|
|
Post trenching 12”, 18” & 20” pipelines
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
40m-55m
|
|
|
Pipeline crossing preparation
|
Mexico
|
Condux/Pemex
|
Firm clay
|
50m
|
|
|
Pipeline trenching and crossing preparation
|
Mexico
|
Condux/Pemex
|
Firm clay
|
40m-60m
|
|
|
Pipeline trenching 30” pipeline
|
Mexico
|
Condux/Pemex
|
Clay
|
45m
|
|
|
Post trenching of a 20” pipeline
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
40-55m
|
|
|
Post trenching 30” pipeline
|
Mexico
|
Condux/Pemex
|
Clay
|
45
|
|
|
Post trenching 11” pipeline
|
Mexico
|
Global Ind. /Pemex
|
Clay
|
20m-30m
|
|
|
Post trenching 10” pipeline
|
Mexico
|
Condux/Pemex
|
Clay
|
20m-30m
|
|
|
Post trenching of a 10” pipeline
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
50m
|
|
|
Post trenching 10” pipeline
|
Mexico
|
Condux/Pemex
|
Clay
|
20m-30m
|
|
|
Post trenching 11” pipeline
|
Mexico
|
Global Ind. /Pemex
|
Clay
|
20m-30m
|
|
|
Post trenching 10” pipeline
|
Mexico
|
Global Ind. /Pemex
|
Clay
|
50m
|
|
|
Pre-trenching
|
Israel
|
Desalination CP
|
Sand
|
7m-15m
|
|
|
Post trenching 2 x 12" pipelines
|
India
|
Clough/Niko
|
Stiff clay
|
4m - 20m
|
|
|
Post trenching 12" pipleine
|
India
|
Clough/Niko
|
Firm clay
|
2m - 5m
|
|
|
Post trenching 8" pipeline
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
40 - 50 m
|
|
|
Post trenching 24" pipeline
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
40m - 50m
|
|
|
Post trenching 20" pipeline
|
Indonesia
|
Saipem/Total
|
Firm clay
|
5m-10m
|
|
|
Numerous 8” – 6” crossings
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
38m-55m
|
|
|
Post trenching 20” & 24” pipelines
|
Mexico
|
Global Ind. /Pemex
|
Firm clay
|
40m-50m
|
|
|
Seabed preparation for jack-up rig spud cans
|
Bay of Bengal
|
IEV/Premier Oil
|
Sand
|
100m
|
|
|
Pipeline trenching
|
Mexico
|
Global Ind. /Pemex
|
Firm Clay
|
40m-60m
|
|
|
Post trenching 600m of 24" pipeline in clay
|
Indonesia
|
J Ray McDermott
|
Stiff clay
|
5m
|
|
|
Post trenching 216m shore approach of 30" pipeline
|
Cameroon
|
Global Industries
|
Sand and clay
|
3m-8m
|
|
|
Post trenching various pipelines & umbilicals
|
Egypt
|
Stolt Offshore
|
Sand and clay
|
8m-20m
|
|
|
Post trenching of various sized pipelines
|
Egypt
|
Stolt Offshore
|
Sand with no cohesion
|
2m-10m
|
|
|
Seabed preparation for jack-up rig spud cans
|
Bay of Bengal
|
Premier Oil
|
Sand
|
100m
|
|
|
Pipeline Trenching
|
Mexico
|
Global Industries
|
Clay
|
40m-60m
|
|
|
Seabed preparation for Jacket installation
|
East Timor Sea
|
J Ray McDermott
|
Sands and clay
|
85m
|
|
|
Backfilling of 45km trench
|
Mexico
|
Horizon
|
Sands and clay
|
40m-60m
|
|
|
Post trenching 9km of various sized pipelines
|
Mexico
|
Horizon
|
Sands and clay
|
40m-60m
|
|
|
Post trenching various sized pipelines
|
Egypt
|
Stolt Offshore
|
Sand with no cohesion
|
2-8m
|
|
|
Post-trenching 70km of 36" pipeline - continued
|
Egypt
|
GUPCO/BP
|
Sands and light clay
|
5m-65m
|
|
|
Post-trenching 70km of 36" pipeline
|
Egypt
|
GUPCO/BP
|
Sands and light clay
|
5m-65m
|
|
|
Seabed preparation for rock dumping
|
Wales
|
Balfour Beattie/Bechtel
|
Silts and clay
|
10m
|
|
Inspection, Maintenance & Repairs
|
|
|
|
|
|
|
Valve Cover Clearance
|
U.S. G.O.M
|
Chet Morrison Contractors
|
Soft Clay
|
50m
|
|
|
Pipeline Deburial
|
North Sea
|
Acergy/BP
|
Soft Clay
|
30m
|
|
|
Pipeline Deburial
|
U.S. G.O.M
|
Chevron
|
Firm Clay
|
20m
|
|
|
Pipeline Deburial
|
U.S. G.O.M
|
Chevron
|
Firm Clay
|
20m
|
|
|
Pipeline Trenching for repair
|
U.S. G.O.M
|
BP
|
Soft Mud
|
187m
|
|
|
Pipeline Trenching for repair
|
U.S. G.O.M
|
Onyx/Enterprise
|
Soft Mud
|
230m
|
|
|
Pipeline Trenching for repair
|
U.S. G.O.M
|
BP
|
Soft Mud
|
200m
|
|
|
Pipeline deburial
|
U.S. G.O.M
|
Oceaneering/Chevron
|
Mud
|
220m
|
|
|
Post trenching of a 30” pipeline
|
U.S. G.O.M
|
CHET/SNG
|
Compacted Sand/Clay
|
3m
|
|
|
Post Hurricane Pipeline Repair
|
U.S. G.O.M
|
Oceaneering/Shell
|
Mud
|
1000m
|
|
|
Post Hurricane Repair Work
|
U.S. G.O.M
|
Global Ind/Chevron
|
Mud
|
10m
|
|
|
Post Trenching 44” pipeline
|
U.S. G.O.M
|
Chet Morrison/BP
|
Sand
|
3m – 6m
|
|
|
Post Hurricane Repair Work
|
U.S. G.O.M
|
Global Ind/Chevron
|
Mud
|
20m – 40m
|
|
|
Deburial of 32" & 24" pipelines for inspection
|
UK, North Sea
|
Subsea7/Total
|
Rock dump removal
|
110m
|
|
|
Pipeline Deburial
|
UK, North Sea
|
Allseas
|
Sand
|
15m-25m
|
|
|
Seabed preparation & post trenching 24” pipeline
|
Egypt
|
Stolt/Burullus
|
Sand & soft clay
|
12m-40m
|
|
|
Seabed Preparation for habitat installation
|
North Sea
|
Allseas
|
Sand & soft clay
|
45m
|
|
|
Deburial of a pipeline
|
U.S. G.O.M
|
Global Ind. /Chevron Texaco
|
Sand
|
210m
|
|
|
Pipeline Deburial
|
U.S. G.O.M
|
Global Ind. /Chevron Texaco
|
Mud
|
40m-60m
|
|
|
Pipeline deburial
|
U.S. G.O.M
|
Cal Dive/Williams
|
Mud
|
290m
|
|
|
Pipeline deburial
|
U.S. G.O.M
|
Oceaneering
|
Mud
|
75m
|
|
|
Freespan Correction
|
Gulf of Thailand
|
Global Industries
|
Mud waves
|
80m
|
|
|
Deburial of mine outfall pipes and area clearance
|
N E Coast of England
|
Briggs Marine
|
Silt
|
14m
|
|
Salvages/Decommissioning
|
|
|
|
|
|
|
Platform Salvage Excavation
|
U.S. G.O.M
|
Howard Energy
|
Soft Clay
|
70m
|
|
|
Platform Leg Excavation
|
U.S. G.O.M
|
Con-Dive/ENI
|
Soft/Medium Clay
|
70m
|
|
|
Jacket Leg Excavations
|
U.S. G.O.M
|
Chet Morrison Contractors
|
Soft Clay
|
50m
|
|
|
Platform Salvage/Well Excavations
|
U.S. G.O.M
|
Chevron
|
Soft/Firm Clay
|
40m
|
|
|
Conductor Excavation
|
U.S. G.O.M
|
Tetra Technologies
|
Soft Mud
|
70m
|
|
|
Conductor Excavation
|
U.S. G.O.M
|
Tetra Technologies
|
Soft Clay
|
30m
|
|
|
Well-Head and Jacket Leg Excavation
|
U.S. G.O.M
|
Newfield Exploration
|
Soft Clay
|
32m
|
|
|
Well-Head Excavation
|
U.S. G.O.M
|
Newfield Exploration
|
Firm Clay
|
30m
|
|
|
Backfilling Well Excavation
|
U.S. G.O.M
|
Magnum Hunter
|
Soft Mud
|
50m
|
|
|
Well-Head Excavation
|
U.S. G.O.M
|
Magnum Hunter
|
Soft Mud
|
50m
|
|
|
Well-Head Excavation
|
U.S. G.O.M
|
Newfield Exploration
|
Firm Clay
|
30m
|
|
|
Well-Head Excavation
|
U.S. G.O.M
|
Magnum Hunter
|
Stiff Clay
|
45m
|
|
|
Rock dump removal
|
Sakhalin, Russia
|
Jan de Nul/Saipem
|
Large & small rocks
|
30m
|
|
|
Jacket Leg Excavations - Decommissioning
|
U.S. G.O.M
|
Cal Dive/Anadarko
|
Mud
|
70m
|
|
|
Post Hurricane Conductor Deburial
|
U.S. G.O.M
|
BP
|
Mud
|
40m
|
|
|
Jacket Leg Excavations – Decommissioning
|
Indonesia
|
IEV/Shell
|
Sand & soft clay
|
85m
|
|
|
Jack-up rig leg recovery
|
U.S. G.O.M
|
Titan/Ensco
|
Stiff Clay
|
110m
|
|
|
Excavation within Jack-up legs
|
Dutch, North Sea
|
Noble Drilling
|
Sand and clay
|
50m-60m
|
|
|
Providing access for hydraulic pipeline cutter
|
Singapore
|
Van Oord
|
Rock & Backfill removal
|
20m
|
|
|
De-burial of Jack-up spud cans
|
Dutch, North Sea
|
Noble Drilling
|
Sands to stiff clay
|
50m-60m
|
|
|
Well-head deburial
|
Malaysia
|
Shell
|
Sands and light clay
|
80m
|
|
Tie-Ins
|
|
|
|
|
|
|
Well-head deburial
|
Malaysia
|
Shell
|
Sands and light clay
|
80m
|
|
|
Subsea Tie-In Excavation
|
U.S. G.O.M
|
Con-Dive/NNG
|
Soft Mud
|
55m
|
|
|
Trench Clearing/Rock Dump Removal
|
Sakhalin
|
Saipem
|
Sandy Sediment
|
35m
|
|
|
Subsea Tie In Trenching
|
U.S. G.O.M
|
Horizon
|
Firm Clay
|
30m
|
|
|
Subsea Tie In/8” Pipeline Deburial
|
U.S. G.O.M
|
BP
|
Soft Clay
|
210m
|
|
|
Pipeline deburial
|
North Sea
|
Subsea7/Total
|
Sand
|
110m
|
|
|
Pre & Post trenching
|
Sakhalin, Russia
|
Jan De Nul/Saipem
|
Sand
|
10m - 30m
|
|
|
Rock Dump removal 300 - 400 mm
|
W Australia
|
Technip-Subsea 7/Woodside
|
Rock dump removal
|
125m
|
|
|
Rock Dump Removal for pipeline deburial
|
UK, North Sea
|
Subsea 7/Total
|
Rock dump removal
|
100m - 110m
|
|
|
Seabed preparation for tie in installation
|
UK, North Sea
|
Subsea 7/Total
|
Sands & very soft clay
|
43m
|
|
|
Post trenching of two pipelines
|
North Sea
|
Subsea 7/Total
|
Sand
|
2m-5m
|
|
Cable Burial
|
|
|
|
|
|
|
Cable burial
|
North Sea
|
Van Oord
|
Sand
|
2m-5m
|
|
|
Pre-trenching cable
|
Mexico
|
Demar/Pemex
|
Firm clay
|
30m-55m
|
|
|
Pre-trenching cable
|
Mexico
|
Demar/Pemex
|
Firm clay
|
30m-55m
|
|
|
Post trenching 200 mm cable
|
UK, North Sea
|
Cns/Vestas/Van Oord
|
Soft clay
|
8m - 15 m
|
|
|
Post trenching 1.1km of 6" fibre-optic conduit
|
Scotland
|
Stolt Offshore
|
Sands and light clay
|
2m-10m
|
|
|
Post trenching of 400m of 35mm fibre-optic cable
|
Scotland
|
Stolt Offshore
|
Sands and light clay
|
10m-15m
|
|
Harbour Clearance
|
|
|
|
|
|
|
Berth Clearance
|
Scotland
|
Montrose Harbour
|
Mud/Silt
|
4m-8m
|
|
|
Jetty Clearance – multiple
|
Indonesia
|
Caltex
|
Silt/Mud
|
11m-20m
|
|
|
Jetty Clearance – Decommissioning
|
Azerbaijan
|
Technip
|
Silt, Mud & Soft Clay
|
4m – 6m
|
|
|
Harbour clearance
|
Scotland
|
Montrose Harbour
|
Silt
|
5m
|
