Rotary drilling head
A rotary drilling head for a rotary drilling apparatus including a hollow or tubular base including a discharge outlet and a lower end adapted to be mounted on a well casing, or the like, and a housing with a rotatable spindle therein insertable into the base in a sealed relationship with the spindle including a stripper rubber at the lower end thereof, and a non-metallic driving connection with the kelly bar at the upper end and journaled internally of the housing through thrust bearing assemblies and sealed in relation thereto by a plurality of unique seal arrangements. Pressurized lubrication is communicated with a passageway defined between the housing and rotatable spindle to provide continuous pressurized lubrication by an air-oil mist. The housing is removably secured to the base by a split clamp structure to facilitate assembly and disassembly of the housing and spindle components with respect to the base.
- Assignee:
- EDB-83-055880
- Patent Number(s):
- US 4363357
- OSTI ID:
- 6401470
- Resource Relation:
- Patent File Date: Filed date 9 Oct 1980; Other Information: PAT-APPL-195633
- Country of Publication:
- United States
- Language:
- English
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