The Group's principal activity is contract drilling of offshore oil and gas wells. The Group provides deep water drilling with a fleet of 45 offshore rigs consisting of 30 semisubmersibles, 14 jack-ups and 1 drillship. The Group owns and operates 30 semisubmersibles, consisting of 11 high-specification and 19 intermediate rigs. High specification semisubmersibles are generally capable of working in water depths of 4,000 feet or greater or in harsh environments. Intermediate semisubmersibles generally work in maximum water depths up to 4,000 feet. The Group has one high-specification drillship, the Ocean Clipper, which was located offshore Brazil as of January 26, 2009. And currently have 14 jack-up drilling rigs, excluding the Ocean Tower, which is currently presented in "Assets held for sale" in our Consolidated Balance Sheets at December 31, 2008.
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