Harvesting an abundance of oil and natural gas resources, the Middle East supplies nearly half of all exports to the global oil market. Middle Eastern countries Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates are all members of the Organization of the Petroleum Exporting Countries (OPEC), which pumps roughly 40% of the world's oil, with Saudi Arabia leading the pack for the greatest amount of output. OPEC's crude oil production was 28.7 million barrels per day in the first half of 2009.
A wireline is an electric cable that is used to lower equipment or devices into a well and can transmit data back to the surface. A number of wireline tools can be lowered into a well in order to gather information; these include gamma ray, nuclear, and magnetic tools, among others. Wireline is usually wrapped around a large spool which can be placed on the back of a truck, or can be a permanent fixture on a rig. A wireline operator is responsible for operation and maintenance of the wireline truck and tools.