Hydraulic clamp for rotary drilling head
This patent describes a rotary drilling head. It comprises a spool body; and an upper drive assembly mounted to the spool body, the drive assembly including drive means adapted for rotation within the spool body, a bearing assembly disposed between the drive means and the spool body, a drive bushing matingly received within the drive means and adapted to receive within the drive means and adapted to receive a kelly drive member and hydraulically operated clamp means for selectively locking the drive bushing against axial displacement within the drive means, the clamp means being remotely controlled to selectively clamp the drive bushing within the drive means; the clamp means including an annular cylinder formed in the upper drive assembly and a hydraulically displaced piston ring slidably received within the annular cylinder, the piston selectively cooperating with at least one locking ball retractably engageable with the drive bushing to prevent axial displacement of the drive bushing within the upper drive assembly, the piston slidably displaceable between an unlocked position and a locked position.
- Assignee:
- MASX Energy Services Group, Inc., Houston, TX (United States)
- Patent Number(s):
- US 5022472; A
- Application Number:
- PPN: US 7-436523
- OSTI ID:
- 6006832
- Country of Publication:
- United States
- Language:
- English
Similar Records
Single bore packer with dual flow conversion for gas lift completion
Mud valve
Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
33 ADVANCED PROPULSION SYSTEMS
330104 -- Internal Combustion Engines-- Rotary
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
OIL WELLS
ROTARY DRILLING
ROTARY DRILLS
WELLS