Invention Grant
- Patent Title: Drag bit with utility blades
- Patent Title (中): 用实用刀片拖动位
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Application No.: US12201516Application Date: 2008-08-29
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Publication No.: US07926596B2Publication Date: 2011-04-19
- Inventor: Yuelin Shen , Youhe Zhang
- Applicant: Yuelin Shen , Youhe Zhang
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Agency: Osha Liang LLP
- Main IPC: E21B17/10
- IPC: E21B17/10 ; E21B10/60
Abstract:
A drill bit comprises a bit body and a plurality of cutting blades extending radially from the bit body, the plurality of cutting blades further comprising cutting elements disposed thereon. The drill bit also comprises a plurality of utility blades extending radially from the bit body, the plurality of utility blades being free of cutting elements.
Public/Granted literature
- US20090065263A1 DRAG BIT WITH UTILITY BLADES Public/Granted day:2009-03-12
Information query
