Hydrodec was born out of an eight year industrial research and development program implemented by Australia's Commonwealth Scientific Industrial Research Organization (CSIRO) and the Australian power industry. CSIRO is Australia's government backed and leading industrial technology research and development organisation. Initial research was directed at the development of advanced refining technology for use with used electrical insulating oils. The research and development program was so successful that it produced a new refining process with application across the petrochemical and oil refining industries. The technology was patented and in 2001, was rolled into a commercial licence held by Hydrodec Development Corporation (HDC). Hydrodec Development Corporation was formed with global rights to commercialise the technology and know how behind the technology. The company was initially established using venture capital funding from Virotec International, an Australian environmental technology company. A first demonstration refining facility commenced construction in 2002. Successful start up of the demonstration facility accelerated the growth of Hydrodec ultimately resulting in the formation of Hydrodec Group plc, a company listed on the AIM in the London Stock Exchange in late 2004.

Petro Holdings, Inc. is a leading retail distributor of home heating oil in the US and sells provides more than 351 million gallons of heating oil a year to approximately 402,000 customers and propane to 7,000 customers in Connecticut, Maryland, Massachusetts, New Jersey, New York, Pennsylvania, Rhode Island, and Virginia. A unit of Star Gas Partners' Star/Petro subsidiary, Petro Holdings also sells home heating oil, gasoline, and diesel to some 28,000 customers on a delivery-only basis. Other activities include HVAC equipment repair, and home security and plumbing services to 11,000 customers.

Over the past 40 years, GS Caltex, which aims to be a total energy service leader, has been pushing to not only perform in the petroleum and petrochemical businesses, but also to diversify its energy business, thus leading the energy industry. GS Caltex (formerly LG-Caltex) operates the world's largest plant producing benzene, which is used in in the production of unleaded gas. Korea's #2 oil refiner after SK Group, the company (jointly owned by GS Holdings and Chevron) has a refining capacity of 770,000 barrels of oil per day, and its aromatic plant can produce 2.8 million tons annually. It also operates 3,400 gas stations. GS Caltex operates a gas utility and is a major importer of liquefied natural gas (LNG). The company also has oil exploration, shipping, and electric power interests. GS Caltex was set up in 1967 as a joint venture of Lucky Ltd. (a predecessor of Korea's LG Group) and Caltex.

Lufkin Industries, Inc. and its subsidiaries manufacture and sell oil field pumping units and power transmission products. Lufkin Industries, Inc. operates through two segments, Oil Field and Power Transmission. The Oil Field segment manufactures and services artificial lift products, including artificial reciprocating rod lift equipment and related products. Lufkin Industries, Inc. also transports and repairs pumping units; and refurbishes used pumping units. In addition, this segment designs, manufactures, installs, and services computer control equipment and analytical services for artificial lift equipment, as well as operates an iron foundry to produce castings for new pumping units. Further, the Oil Field segment provides gas lift, plunger lift, and completion equipment. The Power Transmission segment designs, manufactures, and services speed increasing and reducing gearboxes for industrial applications. Lufkin Industries, Inc. also manufactures capital spares for customers in conjunction with the production of new gearboxes, as well as produces parts for after-market service. Lufkin Industries, Inc. operates in the United States, Europe, Canada, Latin America, the Middle East, and North Africa. Lufkin Industries was founded in 1902 and is based in Lufkin, Texas.

Exterran Holdings, Inc., together with its subsidiaries, provides operations, maintenance, service, and equipment for oil and natural gas industry. Exterran Holdings, Inc. Contract Operations segment offers natural gas compression and production, and processing services, as well as provides engineering, procurement, and on site construction of natural gas compression stations and/or crude oil or natural gas production and processing facilities. Exterran Holdings, Inc. Aftermarket Services segment sells parts and components, and provides operation, maintenance, overhaul, and reconfiguration services. Exterran Holdings, Inc. Fabrication segment designs, engineers, fabricates, installs, and sells natural gas compression units and accessories; and oil and natural gas production and processing equipment designed to heat, separate, dehydrate, and condition crude oil and natural gas. Exterran Holdings, Inc. products include line heaters, oil and natural gas separators, glycol dehydration units, dewpoint control plants, water treatment, mechanical refrigeration and cryogenic plants, and skid-mounted production packages designed for both onshore and offshore production facilities. This segment also provide engineering, procurement, and construction services primarily related to the manufacturing of process equipment for refinery and petrochemical facilities; the construction of tank farms; and the construction of evaporators and brine heaters for desalination plants. Exterran Holdings, Inc. was founded in 1990 and is based in Houston, Texas.

Compton Petroleum explores for and produces oil, natural gas, and natural gas liquids (NGLs) in the Western Canadian Sedimentary Basin of Alberta. Compton Petroleum Corporation focuses its operations on areas with multizone potential, including unconventional resource prospects in southern and central Alberta (including three deep basin natural gas plays: the Basal Quartz sands at Hooker in southern Alberta, and the Gething/Rock Creek sands at Niton and Caroline in central Alberta). Compton Petroleum Corporation assets include a contiguous land base of about 859,800 net acres. In 2008 Compton Petroleum reported 1,460 oil and gas wells and net proved plus probable reserves of 215,500 million barrels of oil equivalent.

Rock Energy Inc. is a junior oil and gas company currently producing more than 3,600 boe per day (60% oil) from two main core areas (Plains/Lloydminster and West Central/Deep Basin). The oil and gas exploration and production company owns heavy oil and natural gas properties in Western Canada, primarily in Alberta and Northeastern British Columbia (the Plains). During the last four years Rock has consistently generated solid performance in production/reserves growth. In 2006 Rock delivered top-quartile finding and development costs. Rock Energy Inc. has an inventory of more than 100 drilling locations (three to four years) which includes a variety of projects generating a full range of risk and reward plays (low risk development locations to high impact exploration projects). Rock has the opportunities and the financial capacity to deliver growth for its shareholders.

C-Tech Oilwell Technologies Inc. is an innovative oil field technology development, sales and services company dedicated to developing coiled rod technology, products and bringing them to the market. C-Tech has been owned by Dover Corporation (NYSE: DOV) since June 2005. C-Tech operates under the Energy Products Group of the Fluid Management market segment of Dover. Through subsidiaries C-Tech provides customers with oil and gas field equipment and services. C-Tech Oilwell Technologies Inc. Pro-Rod subsidiary manufactures coiled rods, rod handling systems, and tubing. Its C-Tech Design and Manufacturing unit makes coiled tubing units and fabricates steel products, including shipping saddles, oil field boilers, and drilling rig modules. C-Tech also provides rig rebuilding, fabrication, and engineering services. Dover Corporation acquired C-Tech in 2005.

Denbury Resources was founded in 1951 and is headquartered in Plano, Texas.Denbury Resources, Inc. engages in the acquisition, development, operation, and exploration of oil and natural gas properties in the Gulf Coast region of the United States, primarily in Louisiana, Mississippi, Alabama, and Texas. Denbury Resources Inc. owns reserves of carbon dioxide (CO2) used for tertiary oil recovery east of the Mississippi River; and operating acreage in the Barnett Shale play near Fort Worth, Texas, as well as holds properties in southeast Texas. Denbury Resources Inc. also sells CO2 to third party industrial users.

Spectra Energy Corp, through its subsidiaries and equity affiliates, engages in the ownership and operation of a portfolio of complementary natural gas-related energy assets. The company operates in four segments: U.S. Transmission, Distribution, Western Canada Transmission and Processing, and Field Services. The U.S. Transmission segment engages in the transportation and storage of natural gas for customers in various regions of the eastern and southeastern United States and the Maritime Provinces in Canada. As of December 31, 2009, its pipeline systems consisted of approximately 14,300 miles of transmission pipelines; and had 285 billion cubic feet of storage capacity. The Distribution segment provides retail natural gas distribution services in Ontario, Canada, as well as natural gas transportation and storage services to other utilities and energy market participants in Ontario, Canada and the United States. This segment had approximately 37,300 miles of distribution main and service pipelines serving approximately 1.3 million residential, commercial, and industrial customers. The Western Canada Transmission and Processing segment provides natural gas transportation, and gas gathering and processing services; and helps natural gas producers by removing impurities from the raw gas stream, including water, carbon dioxide, hydrogen sulfide, and other. The Field Services segment gathers and processes natural gas, as well as fractionates, markets, and trades natural gas liquid. It engages in gathering raw natural gas through gathering systems located in nine natural gas producing regions consisting of the Mid-Continent, Rocky Mountain, east Texas-north Louisiana, Barnett Shale, Gulf Coast, South Texas, Central Texas, Antrim Shale, and Permian Basin. Spectra Energy Corp. is headquartered in Houston, Texas. Spectra Energy Corp. operates independently of Duke Energy Corp. as of January 2, 2007.

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