US Patent 10352101 Composite drill bit
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Patent abstract
A composite drill bit has one or more scraping-wheel cutting units disposed on fixed-blade. The drill bit comprises a bit body, fixed-blades, and scraping-wheels. The angular deflection of the scraping-wheel is in the range of 20°≤|α|≤90°. The scraping-wheel cutting unit has a scraping-wheel shaft and a scraping-wheel with cutters disposed thereon. The scraping-wheel cutting unit is disposed on the fixed-blade by a rotary connection.
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Patent Inventor Names
Liyuan Yang0
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Patent Number
103521010
Date of Patent
July 16, 2019
0Patent Application Number
147665090
Date Filed
February 6, 2014
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US Patent 10352101 Composite drill bit
Infobox
Is a
Patent jurisdiction
Patent number
10352101
Date of patent
July 16, 2019
Patent application number
14766509
Date Filed
February 6, 2014
Patent primary examiner
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