Methods and apparatus for controlled directional drilling of boreholes

Patent · Tue Jan 20 04:00:00 EST 1987

OSTI ID:6904131

Leising, L J

An apparatus adapted for controlling the direction in which a borehole is being excavated is described and comprises: a body adapted to be coupled to rotatable earth-boring apparatus and dependently supported in a borehole from a tubular drill string in which a drilling fluid is circulating; first means cooperatively arranged on the body and adapted for dividing a drilling fluid circulating in a tubular drill string supporting the body into at least two fluid streams to be respectively discharged from rotating earth-boring apparatus coupled to the body and into angularly-spaced sectors of a borehole being excavated; and second means cooperatively arranged on the body. A method is described for selectively excavating an inclined borehole with rotatable earth-boring apparatus suspended from a tubular drill string having a drilling fluid circulating therethrough. The earth-boring apparatus has fluid passages respectively arranged therein for discharging a stream of the drilling fluid into an adjacent sector of the inclined borehole as the earth-boring apparatus is being advanced.

• Assignee: Schlumberger Technology Corp., New York, NY
• Patent Number(s): US 4637479
• OSTI ID: 6904131
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
AZIMUTH
BOREHOLES
CAVITIES
DIRECTIONAL DRILLING
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID FLOW
FLUIDS
INCIDENCE ANGLE
INCLINATION
MOTION
NATURAL GAS WELLS
OIL WELLS
PIPES
ROTATION
WELLS