Method for determining the azimuth of a borehole

Details Method for determining the azimuth of a borehole Method for determining the azimuth of a borehole

1986-02-26

1987-07-28

Stearns, Richard R.

Geometrical instruments

Indicator of direction of force traversing natural media

Process

33313, E21B 4702

Patent

active

046824219

ABSTRACT:
A method for eliminating the influence of drill string magnetization on an azimuth measurement made by a magnetometer package disposed in the drill string. The method comprises first eliminating the influence of the cross-axial components of the drill string magnetization by taking magnetometer readings at various angular orientations of the drill string and then eliminating the influence of the axial component of the drill string magnetization.

REFERENCES:
patent: 3862499 (1975-01-01), Isham et al.
patent: 3935642 (1976-02-01), Russell
patent: 4163324 (1979-08-01), Russell et al.
patent: 4345454 (1982-08-01), Brown
patent: 4414753 (1983-11-01), Moulin et al.
patent: 4472884 (1984-09-01), Engebretson
patent: 4510696 (1985-04-01), Roesler
patent: 4559713 (1985-12-01), Ott et al.

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