As home to supermajors, as well as a plethora of smaller, independent energy players, the US boasts one of the largest concentrations of energy personnel in the world. With its insatiable appetite for energy resources, the United States is the world's single largest consumer of oil, using as much as 20.73 million barrels per day as of 2008. Recently, interest has peaked in the vast quantity of untapped natural gas resources in the US, the reserves of which were inventoried in 2008 at 238 Tcf, with producers specifically targeting the nation's promising shale formations for this energy commodity.
A Rigger is someone who sets up equipment and prepares it before work can commence. The term "rigger" originates from sailing where sailors were responsible for raising the sails and rigging on board a ship. Scaffolding is a temporary structure built to support people and materials during repairs and maintenance of buildings and other structures. In the oil and gas industry, scaffolding is used on oil rigs to allow access to parts of the rig for maintenance and other work. An offshore scaffold will usually have to obtain safety certification for working at extreme heights.