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Stabilizer for drillstems

Patent ·
OSTI ID:6533163
A drillstem stabilizer is described comprising: at least three circumferentially spaced helical stabilizing blades each having leading and trailing ends, each pair of adjacent blades defining a groove therebetween, a tapered blade portion at each leading and trailing end sufficiently long to bear a transverse load. The leading tapered blade portion and trailing tapered blade portion are separated by a cylindrical blade portion of a length at least one-half the overall diameter of the stabilizer including the blades, wherein at least a portion of each of the blades is aligned with at least a portion of an adjacent blade with respect to the longitudinal axis of the stabilizer within each of the tapered portions.
Assignee:
Gulf Canada Corp., Calgary
Patent Number(s):
US 4664206
OSTI ID:
6533163
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
ALIGNMENT
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PIPES
STABILIZATION
SUPPORTS
WELL DRILLING
WELLS