Rock bit with rigid face seals and recessed energizers
Patent
·
OSTI ID:7090628
This patent describes an earth boring bit with an improved pressure compensating face seal means. It comprises: a body; a cantilevered bearing shaft extending obliquely inwardly and downwardly from the body; a cutter secured for rotation about the bearing shaft, with axial and radial play due to clearances; a lubrication system in the body, including a hydrostatic pressure compensator; seal groove means including registering shaft and cutter seal grooves with a pair of oppositely facing radial end walls and a pair of oppositely facing circumferential, beveled walls, one located in the cutter and the other in the shaft, each of which intersects a respective radial end wall.
- Assignee:
- Hughes Tool Co., Houston, TX (USA)
- Patent Number(s):
- US 4923020; A
- Application Number:
- PPN: US 7-210681A
- OSTI ID:
- 7090628
- Country of Publication:
- United States
- Language:
- English
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