Mapping apparatus employing two input axis gyroscopic means

Measuring device for measuring deviation of body and method...

Measuring instruments

Method and apparatus for use in creating a magnetic...

Method for connecting magnetic measurements performed in a well

Method for determining azimuthal direction relative to true nort

Method for determining caster camber and toe-in

Method for determining the azimuth of a borehole

Method for the detection and correction of magnetic interference

Method of correcting for axial and transverse error components i

Method of determining actual size of flow openings in a tubular

Method of determining the difference in borehole azimuth at succ

Method of using a borehole televiewer dipmeter for determining t