Pressure equalized stabilizer apparatus for drill string

Patent · Tue Aug 19 00:00:00 EDT 1986

OSTI ID:5247812

Webb, D D; Anderson, E A

This patent describes an apparatus for controlling the direction of a well bore being drilled by a drill string with the bit thereon comprising: a tubular mandrel having an enlargement adjacent each end thereof to provide a mandrel section between the enlargements which is of smaller outer diameter than the diameter of the enlargements; a stabilizer member on the mandrel section; isolating means between the mandrel section and stabilizer member; bearing means extending longitudinally between the seal means within the lubricant reservoir and movable therewith to accommodate relative longitudinal and rotational movement between the tubular mandrel section and stabilizer member; pressure equalizing means carried by the stabilizer member and movable longitudinally and rotatably therewith to communicate pressure from the well bore to the lubricant reservoir between the mandrel section and stabilizer member irrespective of the longitudinal position of the reservoir along the mandrel section between the isolating means; a clutch mechanism between the mandrel and stabilizer member to accommodate rotation of the mandrel relative to the stabilizer member in one direction while preventing rotation between the stabilizer member and mandrel in the opoposite direction.

• Assignee: NOV; NOV-85-020943; EDB-86-173010
• Patent Number(s): US 4606417
• OSTI ID: 5247812
• Resource Relation: Patent File Date: Filed date 8 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
42 ENGINEERING
DIRECTIONAL DRILLING
PRESSURE CONTROL
NATURAL GAS WELLS
OIL WELLS
DRILL BITS
DRILL PIPES
FRICTION
LUBRICANTS
PISTONS
ROTATION
SEALS
SPACE DEPENDENCE
STABILIZATION
CONTROL
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
MOTION
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)