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Improvements in device to prevent the outbreak of type of Ram used in Drill Pipe
Improvements in device to prevent the outbreak of type of Ram used in Drill Pipe
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机译:改进设备以防止钻杆中使用的闸板类型出现
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摘要
A ram-type blowout preventer having a body with a central bore extending therethrough and with guideways extending outward from the central bore, a ram in each of the guideways and having a recess on its front face, a front packer positioned in said ram recess and including a backing portion and an insert portion, the insert portion being tightly inter-engaged with said backing portion.
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