Carrizo Oil & Gas, Inc. was founded in 1993 and is based in Houston, Texas.Carrizo Oil & Gas sees its future in 3-D. Carrizo Oil & Gas, Inc. is an independent exploration and production company that explores for oil and gas in the Barrett Shale play of North Texas, and in proven onshore fields along the Gulf Coast of Texas and Louisiana, Carrizo aggressively acquires 3-D seismic data and arranges land lease options in conjunction with conducting seismic surveys. As part of a new strategy, Carrizo Oil & Gas, Inc. is exploiting the Marcellus Shale play (New York, Pennsylvania, West Virginia and Virginia). Carrizo has additional properties in the Rockies, Alabama, Arkansas, Kentucky, New Mexico, and in the North Sea. In 2008 the firm reported proved reserves of 432.1 billion cu. ft. of natural gas equivalent.

Truman Arnold Companies (TAC) markets and distributes more than 1 billion gallons of petroleum products a year to customers located in 48 states in the US through its TAC Energy subsidiary. Its TAC Terminals unit operates two major petroleum terminals in Arkansas (with 1.3 million barrels of capacity). Through its TAC Air unit, Truman Arnold Companies offers fixed-based operations (FBO), including aircraft fueling, hanger, and ground transportation services, through 13 general aviation facilities in the US. Truman Arnold Companies also operates two Road Runner convenience stores and has interests in real estate and ranching.

Continental Energy is a junior oil and gas exploration company with assets in Indonesia. Continental Energy has production-sharing contracts giving it exclusive petroleum exploration and production rights in two significant exploration concessions, the Bengara-II (with about 1.2 million acres) and the Yapen block. The exploration and production company also had a concession to develop the Bangkudulis Oil Field, but sold it in 2005. In 2007 Continental Energy set up a biofuels subsidiary, Continental Biofuels. Directors and officers own about 24% of the Continental Energy.

Nicklos Drilling Company provides land and offshore contract drilling services in the Texas Gulf Coast, Southeast Texas, and Southwest Louisiana. Nicklos Drilling has four differently configured rigs capable of drilling in a depth range from 6,500 feet depth maximum to 17,000 feet maximum. Nicklos Drilling Company is owned and managed by Texas oil industry veterans Jim Nicklos (whose previous oil contracting business had gone bankrupt in the mid-1980s) and Jack Blanton (a one-time VP of family-owned Scurlock Oil). Nicklos Drilling Company by providing valuable oil field services that Nicklos Drilling makes its money.

It's the octane in fuel in the pipes of Buckeye Pipe Line that gets engines to buck up. A partnership subsidiary of Buckeye Partners, the company operates an interstate common carrier refined petroleum pipeline that runs some 2,643 miles from Massachusetts to Illinois. The refined petroleum products carried include gasoline, turbine fuel, diesel fuel, heating oil and kerosene. The company serves major population centers in nine states. It is also the major jet engine fuel provider to John F. Kennedy International Airport, LaGuardia Airport, Newark International Airport and a number of other airports within the territory served by the pipeline operator.

Frontier Refining & Marketing, a subsidiary of Frontier Holdings Inc. (which is a subsidiary of Frontier Oil Corporation), operates all of Frontier Oil's marketing, crude and product supply, planning, human resources, and accounting functions. Frontier Refining & Marketing primarily sells its gasoline and diesel to unbranded jobbers, but it also supplies retail operations of other oil companies. The company itself has no retail marketing locations, but does allow jobbers to use the Frontier logo on their retail outlets. Frontier Refining & Marketing is also a major marketer of asphalt to the Front Range area.

Hilcorp Energy, an oil and natural gas producer founded in 1989 by Jeffrey Hildebrand, is one of the nation's largest privately held energy companies. Hilcorp Energy Company employs the latest technology to extract oil and gas from mature fields that have been abandoned by other operators. Hilcorp Energy Company pumps about 25 million barrels of oil and natural gas equivalent annually and has proved reserves of 120 million barrels. A former Exxon Mobil geologist, Hildebrand started the company with former partner Thomas Hook.

Houston American Energy Corp. was founded in 1981 and is based in Houston, Texas.Houston American Energy Corp. engages in the exploration, development, and production of natural gas, crude oil, and condensate. Houston American Energy Corp. primarily focuses on properties in the U.S. onshore Gulf Coast Region, principally Texas and Louisiana, as well as focuses on the development of concessions in the South American country of Colombia. Houston American Energy Corp. also holds interests in producing wells in Plaquemines Parish, Louisiana; Matagorda County, Texas; and Ellis County, Oklahoma. As of December 31, 2008, its net proved and proved developed reserves consisted of 211,475 barrels of oil in South America and 1,941 barrels of oil in North America.

Saxon Energy Services is a land-based drilling and well-servicing contractor focusing on markets outside Canada and the US. Saxon Energy Services Inc. provides technology, equipment, and trained crews to oil and gas producers. Since Saxon Energy Services Inc. founding in 1995 it has pursued a strategy of acquisition to double its assets in South America. Saxon Energy Services Inc. acquired Ecuador-based subsidiary Perforec in 2001, and Saxon Energy Services Inc. entered Venezuela in 2005 with the acquisition of Justiss Drilling. In 2008 Saxon Energy Services was operating 58 drilling rigs in Canada, Colombia, Ecuador, Mexico, Peru, the US, and Venezuela.

ASRC Energy Services (AES) is a leading oil and gas service company with headquarters in Anchorage, Alaska. ASRC Energy Services operate in Alaska, Canada, and Louisiana, and have the resources and expertise to offer complete services throughout the life of an oil and gas field. ASRC Energy Services services include well drilling and completion, well testing, facilities engineering, geophysical services, demolition, pipeline construction and maintenance, module fabrication and assembly, and offshore construction and maintenance.

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