Directional survey Definition

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Directional survey:

A logging method that records rift angle, or deflection from the vertical, and direction of the drift.

A single-shot directional-survey instrument makes a single photograph of a compass reading of the draft direction and the number of degrees the hole is off vertical.

A multishot survey instrument obtains numerous readings in the hole as the device is pulled out of the well.

See directional drilling.

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