INTEC Engineering - World Leader in Deepwater Technology - Subsea, FPSO, Pipelines, Flow Assurance, Facilities

Project List: Marine Pipelines & Risers

The following table contains a summary of INTEC experience in various Pipeline and Riser Projects.

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Sub-Categories: Marine Survey Pipelay

Project Name Client Project Highlights Finish Date

Eastchester Pipeline Extension Project New York, USA Iroquois Gas Transmission Company 24-inch x 27 miles long offshore pipeline crossing the Long Island Sound to the Bronx area. Ongoing

Mardi Gras Deepwater Pipeline System Gulf of Mexico BP Large diameter Oil and Gas export pipelines in water depth to 6,200 ft in the Gulf of Mexico. Ongoing

Agbami Field Development Offshore Nigeria ChevronTexaco Front End Engineering Design of the development of EPIC bid packages for an FPSO and subsea systems, including flowlines, risers and export system for a major field development in 5,400 ft water depth. Ongoing

Scarab/Saffron Field Development Offshore Egypt Burullus Gas Company Deepwater Managing Contractor (DMC) for an 8-well subsea field development in 2,800 ft water depth with dual 40 mile long 24- and 36-inch pipelines to an onshore gas processing plant. 2003

Canyon Express Gulf of Mexico TotalFinaElf 12-inch x 96 miles Gas production pipeline in maximum water depth of 7,250 ft, transversing through challenge terrain. 2002

Horn Mountain Export Pipelines Gulf of Mexico BP (Vastar) 12-inch Oil 36-inch and 10-inch Gas pipelines, 42 miles long in maximum water depth of 5,420 ft. 2002

Mobil Bay Pipeline Projects, MB-63.2, MO-822.7, and MB-63.3Mobile, Alabama, USA ExxonMobil Production Company (New Orleans) 3-high temperature (300F) and high pressure (7,000 p.s.i.) flowline and pipe-in-pipe systems in the Mobil Bay area. 2001

Marshall-Madison Flowline Project Gulf of Mexico ExxonMobil Development Company Three subsea wells and 6-inch by 10-inch pipe-in-pipe insulated production flowlines in water depths approximately 4,800 ft. 2001

Zafiro Project Offshore West Africa Mobil Equatorial Guinea Multiple flowlines for a 10 well subsea field development. 2000

Diana Development Project Gulf of Mexico Exxon Mobil Development Company Two 20-inch x 130 mile pipelines at 5,000 ft water depth in the Gulf of Mexico. 2000

Mica Field Development Project Gulf of Mexico ExxonMobil Development Company 8-inch and 12-inch pipe-in-pipe flowlines and an 8-inch x 28 mile long flowline in water depths of 1,300 to 4,500 ft. 2000

Shell Bonga Gas Export Pipeline Offshore Nigeria Shell Deepwater Development Systems Inc. 16-inch x 27 km gas export pipeline from the Bonga FPSO with SCR in 1,100 m water depth to a shallow water riser platform. 1999

Blue Stream Pipeline Project Black Sea GasProm / PeterGas B.V. 2 x 24-inch x 300 km gas pipelines crossing the Eastern Black Sea between Djubga, Russia and Samsun, Turkey in water depth of 2,100 m. Sea bed has high levels of H2S. 1999

BSP AMRJ-I and Tulong Pipeline Offshore Brunei Brunei Shell Petroleum Company 16-inch x 25 km long offshore pipeline from AMRJ-I Platform to shore, and a 14-inch x 14 km long pipeline with a subsea tap into a 16-inch pipeline. 1999

Esso Marine Terminal Pipeline System Sriracha, Thailand Esso Thailand Four 12-inch and one 2-inch diameter pipelines and risers from an offshore tanker terminal to an onshore refinery. 1999

Pluto Subsea Development Project Gulf of Mexico Mariner Energy, Inc. Detailed Design of 8-inch x 30 mile long flowline from subsea well in 2,700 ft water depth to a host platform. 1999

King/King's Peak Subsea Development Project Gulf of Mexico Amoco, Inc. 6-inch in 10-inch pipe-in-pipe flowlines, 6-inch and 8-inch flowlines and 16-inch export pipeline in 5,500 ft to 6,600 ft water depth including the first pipe-in-pipe SCR. 1999

Angola Block 15 Project Offshore West Africa Exxon Upstream Development Company Multiple 6-inch to 10-inch flowlines in 1,200 m water depth including pipe-in-pipe and bundles. Flexible risers and hybrid riser towers for connection to an FPSO. 1999

Gemini MC 292 Subsea Field Development Gulf of Mexico Texaco, Inc. Dual 12-inch x 28 mile long gas flowlines in 3,400 ft water depth. 1999

Fuji Subsea Development Project Gulf of Mexico Texaco, Inc. 8-inch and 14-inch x 32 mile long pipe-in-pipe flowline in 4,200 ft water depth. 1999

Neptune Subsea Development Project Gulf of Mexico British Petroleum Exploration Inc. Two 26-inch export pipelines and SCR's in 6,000 ft water depth. 1998

Tapis-E Field Pipeline Detailed Engineering Design Offshore Malaysia Esso Production Malaysia Inc. 12-inch diameter 10 km long production pipeline 10-inch diameter x 6 km long water injection and 6-inch diameter x 6 km long gas life pipeline and risers between Tapis-E and Tapis-A and B Platforms. 1998

East Mississippi Canyon Project Gulf of Mexico Shell Oil Company Three 18-inch to 24-inch OD x 150 mile pipelines in a water depth of 7,500 ft in the Gulf of Mexico. 1998

Gorgon Subsea Field Development Offshore Western Australia Texaco, Inc. and Mobil Oil Company Multi-well subsea manifolds, in field flowlines and large diameter trunkline to Barrow Island. Water depths from 100 m to 1,100 m. 1998

Malampaya Pipeline Project Offshore Philippines Shell International Exploration and Production 2x16-inch CRA clad flowlines and a 24-inch 500 km long export pipeline across a 1,000 m water depth region susceptible to mass gravity flows and seismic action. 1998

Trans Caspian Pipeline Project Caspian Sea Enron USA Dual 28-inch x 300 km long gas pipelines crossing the Caspian Sea through 200 m water depth from Turkmenistan to Turkey. 1998

Conoco West Natuna Gas Project Offshore Indonesia Conoco, Inc. 20-inch x 472 km gas trunkline with smaller lateral pipelines connecting several production platforms to the trunkline via subsea manifolds. Pipelines were based on limit state design approach. 1998

MLNG-Tiga Pipeline Project Offshore Malaysia Petronas Carigali Sdn Bhd 22-inch x 109 km long gas pipeline from Helang Field to E11R-C Riser platform. 36-inch x 150 km long gas pipeline from Jintan Field to E11R-C Riser platform. 32-inch x 132 km long pipeline from E11R-C Riser Platform to onshore LNG plant at Bintulu, Sarawak. 1998

Yadana Pipeline Project Offshore Myanmar TOTAL Moattama Gas Company 36-inch x 340 km long offshore gas export pipeline from offshore Myanmar to a landfall at Heinze Chaung in Thailand. 1997

Natuna Pipeline Project South China Sea Exxon Production Research 36-inch x 1,000 km long gas export pipeline from the Natuna Field offshore Indonesia to a junction platform offshore Thailand. 1997

Tantawan Field Development Gulf of Thailand Pogo Producing Inc. Production flowlines between two platforms and an FPSO and a gas sales pipeline. 1997

Green Canyon 60 Development Project Gulf of Mexico Mobil Exploration & Producing US, Inc. Two 6-inch x 8 mile long flowlines in water depth of 760 ft connected to a platform via steel catenary risers (SCRs). 1996

Allegheny Field Development Gulf of Mexico Enserch 4-inch and 6-inch pipe-in-pipe flowlines and 12-inch and 16-inch export pipelines including steel catenary risers in water depth, 3,000 ft. 1996

Chrysaor Field Pipeline System Offshore Western Australia Western Australia Petroleum (WAPET) Corrosion Resistant Alloy (CRA) flowlines in water depth of 200 to 1,000 m and 75 km long trunkline to Barrow Island. 1996

Mobil Etim and Ubit Pipelines Offshore Nigeria Mobil Producing Nigeria Limited Three 12-inch pipelines from Etim and Ubit Platforms to an existing production platform. 1996

Tapis A and B Field Pipeline Risers Offshore Malaysia Esso Production Malaysia Inc. Riser stress analysis for 12-inch crude oil pipeline at Tapis-A Platform and 6-inch gas lift and 10-inch water injection pipeline risers at Tapis-B Platform. 1996

Seligi-F Field Development Offshore Malaysia Esso Production Malaysia Inc. 16-inch diameter 4 km long 3-Phase production pipeline, two (3-inch and 6-inch diameter 4 km long) gas life pipelines Seligi-F and Seligi-D Platforms. 1995

Oman-India Gas Pipeline Indian Ocean Oman Oil Company 24-inch x 1,100 km gas pipeline in water depths to 3,500 m between Oman and India. 1995

Marlim/ Albacora Field Pipelines Offshore Brazil Stena Construction 6-inch to 16-inch diameter pipeline in water depths to 900 m in the Marlim and Albacora Fields. 1994

Skaha Lake Pipeline Crossing Vancouver, BC, Canada BC Gas A 16-inch gas pipeline crossing of an inland lake in British Columbia. High scrutiny of environmental aspects. 1994

Mississippi Canyon 401/ 445 Subsea Development Gulf of Mexico Oryx Energy Three subsea gas wells in up to 600 m water depth individually tied back to a shallow water platform with flexible flowlines and control umbilical. 1994

Rocky Field Development Project Gulf of Mexico Shell Offshore Two 3-inch in 6-inch pipe-in-pipe flowlines, 4 miles long in a water depth of 1,800 ft in the Gulf of Mexico. 1994

Mobile Bay Flowlines Gulf of Mexico Exxon USA Flowline systems for high pressure, high temperature sour gas using special corrosion resistant alloy materials and pipe-in-pipe insulated flowlines and risers. 1994

Zinc Subsea Field Development Gulf of Mexico Exxon USA Detailed design of three flowlines and control umbilical between a subsea production template in 450 m water depth and a shallow water platform. 1993

Lasmo Cohasset/ Panuke Field Pipeline System Nova Scotia, Canada Lasmo Nova Scotia Ltd One 8-inch production flowline and one 6-inch water injection line, each 10 km long between Cohasset and Panuke Platforms, two 6-inch x 2.4 km long condensate export flowlines to an FSO. 1992

Vancouver Island Pipeline Project Offshore Western Canada Westcoast Energy, acting on behalf of Pacific Coast Energy Corporation Second deepest pipeline when installed in 1991, ROV operated deepwater mechanical pipeline supports, deepwater survey techniques and vertically drilled shore crossing through rock. 1992

Fairway Field Flowlines Mobile Bay Offshore Alabama Shell Oil Company Four 6-inch inconel lined flowlines for transport of high pressure, high temperature, sour gas from satellite wellhead platforms to central production platform. 1991

Northwest Palawan Gas Development Offshore Philippines Occidental Petroleum International 480 km long large diameter gas pipeline in water depths of 450 to 900 m. 1990

Merluza Gas Pipeline Project Offshore Brazil Shell Pecten Exploration First long distance gas pipeline system consisting of 16-inch x 186 km offshore, with 25 km long onshore segment with horizontally drilled shore crossing. 1990

Marine Survey back to top

Project Name Client Project Highlights Finish Date

Eastchester Pipeline Expansion ProjectLong Island Sound, New York Iroquois / Stone and Webster 24-inch gas pipeline from Northport, Long Island to Eastchester, New York. Highly environmentally sensitive. 2002

Mobile Bay Flowlines Offshore Alabama Exxon USA Flowline system for high pressure sour gas using special non-corrosive materials and insulated pipe. 2001

Northstar and Liberty Projects, Offshore Alaska British Petroleum Exploration (Alaska), Inc. First arctic offshore pipeline projects in the USA. 2001

El Paso Prince Field Development Gulf of Mexico El Paso Energy Partners Mini-TLP in 470 m water depth, SCR risers and two export pipelines. 2001

Parana River Pipeline Crossing Argentina Techint 24-inch x 28 km pipeline crossing of a major river and flood plain. 2000

Installation of Fairway Field Flowlines Mobile Bay, Alabama Shell Oil Company Installation of four 6-inch diameter high temperature, high pressure pipelines in shallow water. 2000

SPM Marine Terminal Dominican Republic Coastal Corporation 8-inch LPG and 12-inch diesel pipeline from a Conventional Buoy Mooring (CBM). 1999

Blue Stream Project (Black Sea Crossing)Black Sea Gazprom/PeterGaz Russia/Holland 24-inch x 380 km pipeline in 2,140 m water depth from Russia to Turkey, across the Black Sea. High H2S environment, extreme seabed gradients and potential geohazards. 1999

King Development Project Gulf of Mexico Amoco 12-inch and 16-inch export system in 2,000 m water depth in the Gulf of Mexico. Project management and supervision of deep tow, detailed pipeline route survey including swathe bathymetry, sidescan survey and soil sampling. 1999

Pluto Development Project Gulf of Mexico Mariner Energy Subsea tie-back development in 2,700 m water depth. Desktop study and total project management of deep tow swathe bathymetry pipeline route survey. 1999

Dulcimer Development Project Gulf of Mexico Mariner Energy Subsea tie-back development in 1,120 m water depth. Desktop studies and total project management of deep tow swathe bathymetry pipeline route survey. 1999

Gyrfalcon Project Gulf of Mexico TOPS Subsea tieback in 250 m water depth. 1999

Malampaya Development Project Philippines Shell Philippines Exploration (SPEX) 24-inch x 500 km pipeline to 900 m water depth. Significant geohazard issues, debris and turbidity flows, continental collision zone, seismically active, highly irregular seabed. 1998

SPM Marine Terminal Manavgat Water Supply Project Turkey D.S.I. A water export project on the Mediterranean coast of Turkey involving two SPM systems and four 48-inch 3 km long loading lines for export of fresh water. 1998

PSR-2 Marine Terminal and Submarine Pipeline,Malaysia Malaysian Refining Co. Sdn Bhd 48-inch 10 km long crude oil offloading pipeline, SPM system and tie-in to onshore facilities. 1998

CABOT Terminal Project Port Dickson, Malaysia CABOT Malaysia Sdn. Bhd. Marine terminal project including 9.3 km pipeline in 32 m water depth. 1998

High Island 587 Development Project Gulf of Mexico British Petroleum 9.7 km subsea tie-back in 120 to 300 m water depth. 1996

Oman to India Pipeline Arabian Sea Oman Oil Company 28-inch x 1,130 km pipeline in 3,500 m water depth.Significant geohazard issues in crossing of the Arabian Sea. Dual vessel towed detailed geophysical survey in 3,500 m water depth (world first). 1995

Star and Rayong SPM Marine Terminal Thailand Caltex SPM and 19 km long 48-inch pipeline to serve Caltex and Shell refineries near Rayong, Thailand 1995

Caleta Cordova and Caleta Olivia Terminals Argentina TERMAP S.A Two marine terminal projects including 7 km of pipeline and two CALM-type SPM systems. 1995

Pipeline Replacement Project Taiwan Chinese Petroleum Corporation 42-inch 5.2 km long crude oil pipeline, PLEM and underbuoy hose system. 1995

Vancouver Island Gas Pipeline Marine Crossings British Columbia, Canada Westcoast Energy, Inc. Dual 10.75-inch x 46 km gas pipelines in 415 m water depth. World's second deepest pipeline at time of construction. 1992

Talinpu SPM No. 3 and No. 4 Marine Terminal Projects Taiwan Chinese Petroleum Corporation SPM, 56-inch and 16-inch pipelines, 8 km in length. SPM, two 34-inch pipelines, 6 km in length. 1991

Pipelay back to top

Project Name Client Project Highlights Finish Date

J-Lay System for Drilling Vessel Amethyst Brazil Oil States Industries Preliminary design of a J-Lay system for a semi-submersible drilling vessel for 10-inch diameter pipeline installation in 900 m water depth offshore Brazil. 1998

J-Lay System for Semi-submersible Uncle John Gulf of Mexico Cal Dive International Detail design of a J-Lay system for a semi-submersible vessel for 8- to 10-inch diameter pipeline installation in 750 m water depth. 1998

Rigid Ramp Modification for the BGL-1 Pipelay Barge Brazil Petrobras Modification of the design performed by INTEC in 1993 to accommodate 20-inch diameter pipelay operation in 150 m water depth. 1998

Conversion and Outfitting of a Cargo Barge Singapore IPCO Marine Conversion and outfitting of a cargo barge into pipelay/crane barge to install multiple pipelines simultaneously and installation of marine structures. 1997

Stinger Design Global Pipelay Barge Chikasaw Gulf of Mexico Global Pipelines Inc. Detail design of a stinger to enhance pipelay depth to reach 1,200 m. 1994

Stinger Design for Pipelay Barge BGL-1 Brazil Petrobras Detail design of a stinger to enhance 16- inch diameter pipelay depth capability of the BGL-1 to 275 m. 1993

Conversion of Work Barges Argentina Techint Detailed design of a pipelay system to convert two work barges into a pipelay system for installation of a 24-inch pipeline in shallow water. 1989

Low Cost Alternatives for Deepwater Pipeline Installation Joint Industry Study Evaluation of existing and prototype construction equipment to install pipelines in water depths from 300 to 1,500 m. 1989

Conversion of Crane Barge Stanislav Yudin Helsinki, Finland Valmet Corporation Preliminary design for the conversion of a crane barge into a pipelay vessel and stinger design for the vessel. 1987

Caspian Sea Pipelay Barge Israphil Guseynov Caspian Sea Valmet Corporation Preliminary design of a new barge to install pipelines in the Caspian Sea with a retractable stinger. 1986

Pipelay Barge for Barents SeaBarents Sea Valmet Corporation Preliminary design of a pipelay barge, with pipe ramp within the hull to provide protection to pipeline in ice covered water. 1982

Viking Piper Pipelay Barge North Sea Viking Jersey Ltd. Design of a new barge which included double jointing to lay pipe of up to 48-inch diameter. 1975

Caspian Sea Pipelay Barge Suleymom Vezirof Caspian Sea Gusto Shipyard Design of a new barge to lay pipe of up to 34 inch diameter in water depths up to 200 m. 1974