Drill steering apparatus

Patent · Tue Jan 13 04:00:00 EST 1987

OSTI ID:7187384

Shirley, K R

A steering tool is described comprising a tubular body having means on each end for connecting into a drill string at a position close to the drill bit, an upper stabilizer on the tubular body having means coacting between the tubular body and the upper stabilizer to sense the low side of the well bore being drilled, a lower stabilizer on the tubular body having means coacting between the tubular body and the lower stabilizer to impart a lateral thrust to the tubular body responsive to the sensing of the the low side of the well bore by the upper stabilizer, means adjustably interconnecting the sensing means in the upper stabilizer to the thrust means in the lower stabilizer to provide thrust in a preselected direction to the lower end of the tubular body and means for securing each of the stabilizers to the tubular body for rotation therewith and allowing freedom of relative movement between the tubular body and the stabilizers in radial directions.

• Assignee: NOV; NOV-87-044090; EDB-87-043381
• Patent Number(s): US 4635736
• OSTI ID: 7187384
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONDUCTOR DEVICES
CONNECTORS
DIRECTIONAL DRILLING
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
FABRICATION
FASTENING
JOINING
MOTION
NATURAL GAS WELLS
OIL WELLS
PIPES
ROTATION
STABILIZATION
WELLS