In this study, the fracture of piston for rock drill produced from case hardening steel is investigated. In order to study the causes of the fracture, specimens prepared from the damaged pistons were subject.
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[pdf] On April 20, 2010, an and fire occurred on the , which was owned and operated by and drilling for in the about 40 miles (64 km) southeast off the coast. The explosion and subsequent fire resulted in the sinking of the Deepwater Horizon and the deaths of 11 workers.
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