Rotary drill bit
Patent
·
OSTI ID:6437016
This patent describes a rotary drill bit for deephole drilling in subsurface earth formations, the bit suitable to be coupled to the lower end of a drill string, the bit body having a center region near a central axis of rotation and an outer region further removed from the central axis; and a plurality of cutting elements protruding from the bit body. The cutting elements comprising a front layer of interbonded abrasive particles, wherein the cutting elements located in the center region of the bit comprise a thicker abrasive front layer than those in the outer region of the bit.
- Assignee:
- Shell Oil Co., Houston, TX
- Patent Number(s):
- US 4792001
- OSTI ID:
- 6437016
- Country of Publication:
- United States
- Language:
- English
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