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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bertha Rogers ： ウィキペディア英語版 Bertha Rogers The GHK Co. 1–27 Bertha Rogers hole or well was an oil-exploratory hole drilled in Washita County, Oklahoma in 1974, and was formerly the world's deepest hole until in 1979 surpassed by the Kola Superdeep Borehole, dug by the former USSR. It took GHK two years to reach 31,441 feet (9,583 m), a depth of almost six miles. During drilling, the well encountered enormous pressure – almost 25,000 psi (172,369 kPa). No commercial hydrocarbons were found before drilling hit a molten sulfur deposit (which melted the drill bit), and the well was plugged and abandoned.〔, Energy Issues, December, 2005.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bertha Rogers」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.