Invensys Selected by Canadian Natural Resources Limited to Supply Triconex Safety and Critical Control Systems at Horizon Oil Sands Project

August 022005
FOXBORO, MASSACHUSETTS, USA - August 2, 2005 - Canadian Natural Resources Limited ("Canadian Natural") has selected Invensys Process Systems to provide Triconex ( safety and critical control systems and related services for Phase I of the C$6.8 billion Horizon Oil Sands Project ("Horizon Project") under construction in Northern Alberta, Canada. The Horizon Project is a large grassroots mining, bitumen extraction and upgrading facility for production of synthetic crude oil.

Invensys was chosen as the preferred supplier to Canadian Natural for all emergency safety shutdown, boiler management and fire and gas safety systems throughout the Horizon Project, one of the largest oil extraction projects in Alberta's Athabasca oil sands region. Canadian Natural is building the project in three Phases. For the Phase I, Invensys is supplying 38 latest-generation Tricon V10 TMR triple modular redundant (TMR) control systems.

The Triconex safety and critical control systems will be used to protect processes and business units within the Horizon Project's bitumen extraction and upgrading facilities as well as in the cogeneration plant and several remote facilities.

In addition to Tricon safety and control systems, the Invensys direct purchasing agreement with Canadian Natural includes Triconex training, integration and installation services.

The Tricon is an industry-certified state-of -the-art fault tolerant controller based on triple-modular redundant (TMR) architecture for safety and critical control applications. The TMR architecture employs three isolated, parallel control systems and extensive diagnostics integrated into one system. The system uses two-out-of-three voting to provide high integrity, error-free, uninterrupted process operation with no single point of failure. The Tricon controller's redundant control functions and diagnostics are embedded and transparent, and the system behaves as a single control device to the engineer or operator.

About Canadian Natural Resources Limited
Canadian Natural Resources Limited is a senior independent oil and natural gas exploration, development and production company based in Calgary, Alberta. Operations are focused in Western Canada, the North Sea and Offshore West Africa. Since its founding in 1989, the company has grown to over 2,000 employees, production of over 530,000 barrels of oil equivalent per day and an enterprise value of over USD$22 billion. Canadian Natural's common shares are listed on the New York stock exchange under the symbol CNQ and under the Toronto stock exchange as CNQ and CNQ.U, which denotes trading in U.S. funds.

The Horizon Project is designed as a Phased development and includes the open pit mining of bitumen combined with an on-site upgrader. Phase 1 production is planned to begin in the second half of 2008 at 110,000 bbl/d of 34 degrees API light, sweet synthetic crude oil (SCO). Phase 2 would increase production to 155,000 bbl/d of SCO in 2010. Phase 3 would further increase production to 232,000 bbl/d of SCO in 2012. Further information on this project is available at

About Invensys Process Systems
Invensys Process Systems, a business unit of Invensys plc, provides products, services and solutions for the automation and optimization of industrial process plants. In addition to its rapidly expanding Global Solutions group, Invensys Process Systems includes industry-leading brands such as Foxboro, Triconex, SimSci-Esscor, Wonderware, and Avantis, whose products are installed in more than 100,000 plants across the world. These range from small hybrid and batch plants to the world's largest upstream projects, refineries, gas plants, petrochemicals plants, power plants, and pulp and paper mills.

The Invensys Group ( is made up of five businesses: Process Systems, APV, Eurotherm, Rail Systems and Controls. The Group is headquartered in London and is listed on the London Stock Exchange, with over 30,000 employees working in 60 countries.

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