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The Cameron ram-type blowout preventer was the first successful blowout preventer (BOP) for oil wells. It was developed by James S. Abercrombie and Harry S. Cameron in 1922. The device was issued on January 12, 1926. The blowout preventer was designated as a Mechanical Engineering Landmark in 2003.〔〔 ==History== While drilling an oil or gas well, the top of the wellbore is lined with a casing. The drill string runs through the casing. The annular (ring-shaped) region between the casing and the drill stem is filled with drilling mud which provides hydrostatic pressure to keep the formation fluid from coming up the wellbore. If the pressure of the formation fluid exceeds the hydrostatic pressure of the drilling mud, the oil or gas can blow out of the wellbore. This has caused spills of large quantities of oil and fires on drilling rigs. The blowout of the Lucas well at the Spindletop field in 1901 lasted for over nine days and spilled over of oil.〔 James Smither Abercrombie (1891–1975), a Texas oil driller, and Harry S. Cameron (1872–1928), who operated a machine shop, formed the Cameron Iron Works in 1920. Abercrombie had an idea for a blowout preventer and took it to Cameron. They designed and built the device at the Cameron Iron works. This resulted in the first ram-type blowout preventer, which they called the MO BOP.〔〔〔 Cameron Iron Works successfully marketed their blowout preventer and developed other tools for petroleum exploration. In 1990, Cooper Industries acquired the company. Cooper's petroleum divisions were transferred into the Cooper Cameron Corporation.〔 This company is now called Cameron International Corporation. 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「Cameron ram-type blowout preventer」の詳細全文を読む スポンサード リンク
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