Drilling head
Patent
·
OSTI ID:6339774
Drilling head incorporating downwardly facing lip type bearing seals, stationary seal cartridge for head seal, rotating replaceable seal bushing for head seal, and optional screw connection for removable side outlet.
- Assignee:
- Smith International, Inc.
- Patent Number(s):
- US 4526243
- OSTI ID:
- 6339774
- Country of Publication:
- United States
- Language:
- English
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