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.
Duties will vary from onshore to offshore and by rig type, but in general, the Derrickman is a senior member of the drill crew and reports to the Driller. Responsibilities include pipe handling during tripping operations and maintaining and repairing mud pumps and associated equipment while drilling. The Derrickman monitors the properties of drilling fluid being pumped down hole and treats the fluid on a regular basis to maintain those properties.