Methods and apparatus for controlled directional drilling of boreholes
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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CONTROL EQUIPMENT
DIRECTIONAL DRILLING
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DRILLING EQUIPMENT
DRILLS
EQUIPMENT
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