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Methods and apparatus for controlled directional drilling of boreholes

Patent ·
OSTI ID:7229821
A method for determining the directional course of a borehole being excavated with rotatable earth-boring apparatus suspended from a tubular drill string is described comprising the steps of: while the earth-boring apparatus is excavating a borehole, obtaining a first series of measurements representative of the magnitudes of the bending moments and lateral forces that are acting on the earth-boring apparatus; obtaining a second series of measurements representative of the azimuthal directions of the bending moments and lateral forces acting on the earth-boring apparatus; and utilizing the first and second series of measurements for determining whether the earth-boring apparatus is then advancing along a selected course of excavation.
Assignee:
Anadrill Inc., Sugar Land, TX
Patent Number(s):
US 4739841
OSTI ID:
7229821
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
BENDING
CONTROL EQUIPMENT
DIRECTIONAL DRILLING
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
MECHANICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
ORIENTATION
PIPES
ROCK MECHANICS
ROTARY DRILLS
SHEAR
WELLS