Property And Equipment (Tables)

12 Months Ended

Sep. 30, 2011

A summary of property and equipment by classification


	September 30,
	2011			2010
Drilling vessels and related equipment
Cost	$	2,315,419		$	1,733,298
Accumulated depreciation		(435,577	)		(392,808	)

Net book value		1,879,842			1,340,490

Drill pipe
Cost		18,182			15,468
Accumulated depreciation		(13,885	)		(13,563	)

Net book value		4,297			1,905

Furniture and other
Cost		8,800			7,115
Accumulated depreciation		(5,618	)		(5,549	)

Net book value		3,182			1,566

Property and equipment, net	$	1,887,321		$	1,343,961

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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