@book{180135,
	author = {Berkman, Steve and Stokes, Tory},
	title = {Utilization of rig fleet tightens significantly},
	note = {Significant gains were made in US and Canadian land fleet sizes and utilization, spurring rig construction. Tracked for the first time, international markets saw growth in utilization, while the global offshore fleet experienced a tightening of numbers.}
}