Mobile drilling apparatus
Patent
·
OSTI ID:5820261
A drill assembly is described comprising a mobile support means, a mast positioned on the support means, a reciprocally operable drill head and a hydraulic cylinder system supported by the mast and operable to move the drill head. The system comprises lower hydraulic cylinder rigidly connected to the mast, an upper cylinder movable relative to the mast, a lower piston movable within the lower hydraulic cylinder, an upper piston movable within the upper cylinder, a piston rod connected to the lower and upper pistons and a tube surrounding the upper cylinder and connected thereto, the drill head is connected to a lower portion of the tube.
- Assignee:
- Bralorne Resources Limited, Calgary
- Patent Number(s):
- US 4703812
- OSTI ID:
- 5820261
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CYLINDERS
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
DRILLS
EQUIPMENT
HYDRAULIC EQUIPMENT
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PISTONS
SUPPORTS
WELL DRILLING
WELLS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CYLINDERS
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
DRILLS
EQUIPMENT
HYDRAULIC EQUIPMENT
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PISTONS
SUPPORTS
WELL DRILLING
WELLS