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Measurements in oil drilling require three media
Feb 06, 2019


At present, the measurement in the oil drilling process requires three kinds of media, namely the gravity field of the earth, the earth's magnetic field and

The celestial coordinate system, which produces the measuring instruments associated with these three measuring media.

  1. Measuring the angle of the well or the tool of the high side by means of the gravitational field, the measuring elements used are goniometers, compass weights

Or gravity accelerometers, etc. The measurement standard of such instruments is the connection between the measuring point and the center of the earth, that is, the plumb line.

  2. Measure the azimuth or magnetic tool surface by means of the geomagnetic field. The measuring elements used are compasses or fluxgates.

The measurement reference for this type of instrument is magnetic north pole, so the azimuth data measured by the magnetic instrument must be based on the local magnetic

The declination is corrected to the true North Pole, which is the data of the geographic North Pole.

  3. The azimuth or magnetic tool face is measured by means of the celestial coordinate system, and the measuring element used is a gyroscope. Gyro

The instrument is an inertial measurement instrument, not based on any one of the earth, such instruments must be gyroscope before downhole measurement

The rotation axis performs azimuth calibration of the geographic north pole.

Measurements in oil drilling require three media

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