Rate gyro wells survey system including nulling system

Details Rate gyro wells survey system including nulling system Rate gyro wells survey system including nulling system

1994-12-19

1997-08-19

Fulton, Christopher W.

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

33302, 33313, F21B 47022, G01C 1938, G01C 900

Patent

active

056575475

ABSTRACT:
A method for well borehole survey is set out. A sonde supports X and Y accelerometers and X and & sensors on a rate gyro having a Z axis aligned with the sonde. On a slickline, or within a drill string, the sonde is used to measure four variables, these being G.sub.x and G.sub.y, A.sub.x and A.sub.z. This enables well azimuth and inclination to determined. Measuring depth enables a survey to be made.

REFERENCES:
patent: 3862499 (1975-01-01), Isham et al.
patent: 4461088 (1984-07-01), Van Steenwyk
patent: 4472884 (1984-09-01), Engebretson
patent: 4524324 (1985-06-01), Dickinson, III
patent: 4611405 (1986-09-01), Van Steenwyk
patent: 4956921 (1990-09-01), Coles

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