Drilling head with bayonet coupling
A drilling head is described comprising: a tubular spool; a clamp rotatably mounted on the tubular spool, the clamp provided with first bayonet coupling means and adapted for rotation between a clamped position and an unclamped position; an upper body assembly including an outer body, a rotatable kelly bushing adapted to receive a kelly drive member, drive means matable with the kelly bushing for rotation therewith, the drive means adapted for rotation within the outer body, a bearing assembly disposed between the drive means and the outer body, and an elastomeric stripper adapted for sealing engagement with the kelly drive member; the outer body provided with second bayonet coupling means complementary with the first bayonet coupling means, the first and second bayonet coupling means adapted for lowering the upper body assembly through the clamp onto the tubular spool while the clamp is in the unclamped position; and means on the spool for rotating the clamp from the unclamped position to the clamped position to secure the upper body assembly to the tubular spool.
- Assignee:
- Drilex Systems Inc., Houston, TX
- Patent Number(s):
- US 4754820
- OSTI ID:
- 6882286
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BEARINGS
COUPLINGS
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLS
ELASTOMERS
EQUIPMENT
FASTENERS
NATURAL GAS WELLS
OIL WELLS
POLYMERS
ROCK DRILLING
SEALS
WELLS