Quarles Petroleum, a Mid-Atlantic distributor and retailer of petroleum products. Quarles Petroleum distributes fuel oil, supplies propane, and owns and operates Quarles Fuel Network gas stations and fleet fueling sites in the Mid-Atlantic region of the US. Quarles Petroleum Incorporated operates more than 230 fueling sites in six states, as well as 12 Quarles Food Stores in Virginia. Through its Quarles Energy Services division, Quarles Petroleum Incorporated offers residential and commercial fuel delivery services, heating and air conditioning systems, and air purifier and humidifier installation.

Petroleum Traders Corporation barters with fuel. Petroleum Traders Corporation provides wholesale gasoline, diesel fuel, and heating oil to fuel distributors, government agencies, and other large consumers of fuel such as businesses with vehicle fleets. The largest pure wholesale fuel distributor in the country, Petroleum Traders operates and trades in 39 US states. Petroleum Traders Corporation supplies #1 and #2 low sulfur diesel fuels, biodiesel, high sulfur heating oil and kerosene, and conventional, ethanol, and reformulated blends of gasoline in regular, midgrade, and premium octane ratings.

Newpark Resources, Inc. and its subsidiaries provide fluids management, waste disposal, and well site preparation products and services primarily to the oil and gas exploration and production industry. Newpark Resources, Inc. operates in three segments: Fluids Systems and Engineering, Mats and Integrated Services, and Environmental Services. The Fluids Systems and Engineering segment offers drilling fluids products and technical services to drilling projects involving subsurface conditions, such as horizontal, directional, geologically deep, or deep water drilling. This segment also provides completion fluids and equipment rental services. The Mats and Integrated Services segment offers mat rentals, location construction, and related well site services to exploration and production customers in the onshore U.S. Gulf Coast, western Colorado, and northeast U.S. regions; and mat rentals to the utility industry in the United Kingdom. It also installs access roads and temporary work sites for pipeline, electrical utility, and highway construction projects. Newpark Resources, Inc. provides its products and services primarily in the United States Gulf Coast, west Texas, east Texas, Oklahoma, North Louisiana, Rocky Mountains, and northeast region of the United States, as well as Canada, Brazil, the United Kingdom, Mexico, and North Africa. Newpark Resources, Inc. was founded in 1932 and is headquartered in The Woodlands, Texas.

Dana Petroleum is an oil and natural gas exploration and production company with operations in the North Sea, as well as Australia, Egypt, Kenya, Morocco, Mauritania, and Senegal. Dana Petroleum plc has expanded its production activities in the North Sea, where Dana Petroleum plc has 16 producing fields. The company's growth strategy is to balance low-risk production from the UK North Sea with more aggressive high-risk international exploration and production (primarily in Egypt). At the end of 2007 Dana reported proved and probable reserves of 165.8 million barrels of oil equivalent. That year Dana Petroleum plc acquired Devon Energy's oil and gas business in Egypt for $375 million. In 2008 Dana was operating four producing fields in Egypt.

Wenzel Downhole Tools Ltd. (WZL) and its predecessor companies has been a leading supplier of downhole drilling tools to the oil and gas industry for over thirty years. Wenzel Downhole Tools Ltd. has and continues to pioneer and patent new concepts in motor capabilities for numerous drilling applications. Wenzel Downhole Tools Ltd. makes drilling tools (drilling motors, shock tools, and drilling jars) used by the oil and gas drilling industry. Among the company's products are coatings (installation of protective coatings), downhole motors (straight hole, short radius, coiled tubing, and multi-point drilling motors), fabricated equipment, solids-control equipment (screens), and underground tooling. Wenzel Downhole Tools Ltd. also provides oil field equipment rental and repair. Wenzel Downhole Tools operates from Canada and the US; the company offers its products to customers worldwide.

Yangarra Resources Ltd. wants to yank some oil and natural gas from reserves in Western Canada. The exploration and production company (formed from the 2005 merger of TriOil and the former Yangarra Resources Inc.) has three core operating areas in the province of Alberta: Ferrier, Medicine Hat, and Jaslan. Yangarra Resources Ltd. also has noncore operations in Saskatchewan and other areas of Alberta. Yangarra Resources Ltd. has an inventory of more than 50 locations that are prospects for drilling. Yangarra Resources has proved and probable reserves of 2.9 million barrels of oil equivalent. In 2009 it filed for Canada's version of bankruptcy protection and then bought Athabaska Energy, which also produced natural gas in Alberta.

E.ON UK (formerly Powergen) hasn't been a UK energy provider for eons, but long enough to become one of the top power suppliers and producers in the nation. A subsidiary of German utility E.ON, the company is vertically integrated with operations in electricity generation, trading, supply, and distribution. E.ON UK supplies electricity and natural gas to 8 million nonregulated retail customers. Its Central Networks unit operates a distribution network serving 4.9 million power customers. E.ON UK has regulated power utility assets, operates conventional and renewable energy-based power plants, and trades wholesale electricity, gas, and other commodities.

Great Plains Exploration has been exploring for oil and gas in the Great Plains of Canada since its spinoff from Eurogas Corporation. Great Plains focuses its drilling and exploration activities on properties in Alberta (including the Peace River Arch, Pembina, and Randell areas). In 2005 Great Plains Exploration Inc. acquired Calgary-based Rock Creek Resources. Great Plains Exploration Inc. has grown rapidly through acquisition with the additions of Energy Explorer and assets in the Altares area of northeastern British Columbia. In 2008 Great Plains Exploration Inc. acquired undeveloped lands and a large exploration block in northeastern British Columbia. Great Plains Exploration Inc. has proved plus probable reserves of 6.9 million barrels of oil equivalent.

EDF Energy has the London Bridge and Big Ben wired. The company, formerly London Electricity Group, provides retail electric services to customers across the UK. EDF Energy trades energy on the wholesale market and has power generation assets (three power plants) that give it 4,900 MW of capacity. EDF Energy generates about 6% of the power generated in the UK. It operates regulated transmission and distribution assets that deliver electricity to 7.9 million homes and businesses in London and eastern and southeastern England, and it also provides gas supply and infrastructure construction services. EDF Energy is a subsidiary of French utility giant Electricity de France (EDF).

Gary-Williams Energy Corporation (GWEC) is a small, independent oil and gas company, headquartered in Denver, with operations primarily in the Mid-Continent region of the United States. With approximately 300 employees, the company's subsidiaries include Wynnewood Refining Company (Oklahoma), Gary-Williams Production Company and Gary-Williams Real Estate Company. Refining and wholesale marketing are now the company's primary businesses. The company maintains a small marketing office in Oklahoma City. Today, the company's major asset is a 70,000 BPD crude oil refinery in Wynnewood, Oklahoma, purchased from Kerr-McGee in mid-1995, and operated as Wynnewood Refining Company (WRC). The refinery produces gasoline, diesel fuel, military jet fuel, solvents and asphalt.

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