AZcorr – Drill String Magnetic Interference Survey Calculator

Now you can know exactly how much azimuth error is in your downhole survey.

Do you ever wonder why the azimuth swings when you pick up a new motor? Ever noticed how the direction inexplicably changes when drilling out of casing?

It is not enough to evaluate a survey by comparing the reported values of magnetic dip angle and field strength. Because of the way that drill string interference affects azimuth and magnetic qualifiers it is possible to take a survey where the qualifiers look good but the azimuth is off by 10 degrees or more! AZcorr will tell you if you have Drill String Interference, will tell you the real direction of your borehole, and will even inform you of other possible survey problems.

Evaluate surveys that are being taken now or surveys that were taken years ago. AZcorr provides a determination of survey quality based on expected or theoretical values for magnetic field strength and will iterate an improved azimuth reading that eliminates the effects of axial magnetic interference!

AZcorr is used to obtain information about MWD or directional drilling surveys but should not be used to correct surveys for customer or legal use. To enquire about verified survey correction, contact Sparrow Technology Inc.

http://www.sparrowtech.ca/