Rotary drilling head

Details Rotary drilling head Rotary drilling head

1980-10-09

1982-12-14

Purser, Ernest R.

Wells

Above ground apparatus

With seal for reciprocating member

175209, 277 31, 285 55, E21B 3303

Patent

active

043633579

ABSTRACT:
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.

REFERENCES:
patent: 3128614 (1964-04-01), Auer
patent: 3400938 (1968-09-01), Williams
patent: 3497244 (1970-02-01), Grantom

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