Drill bit insert
作者： Jr. William Shay
DOI:
关键词: Hard metal 、 Engineering 、 Oil well 、 Composite material 、 Drill bit 、 Insert (composites)
摘要: A protruding insert for use in an oil well drill bit is disclosed which made of a hard metal substance and utilizes tangential spherical surface having opposed flattened sides.
lens.org 参考文章(6)
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