The North Seeking Gyroscope - Surface Recording (NSG-SR) operates on an e-line unit so that data may be monitored by an operator on surface. At only 42mm OD the instrument is small and rugged and incorporates the latest north seeking gyro technology combined with advanced electronics to provide high accuracy and reliability.

Unlike conventional gyros north-seeking gyros will not typically drift over time. The ability of the gyro to maintain an internal north reference negates the need for surface referencing or gyrocompass alignment.

During operation the instrument is stopped at a survey station momentarily to perform a gyrocompass ensuring an independent true north reference at each station. Surveys are then transmitted to the surface and can be viewed on the remote display without the need for post survey processing.

APPLICATIONS:

The most common applications are:

• Accurate delineation of drill path - free from magnetic interference
• Cased hole / in-rod surveying applications
• Whipstock / DHM and other kickoff orientations

ADVANTAGES:

• Short length, small OD and light weight
• Accurate and reliable
• Not affected by magnetic interference from drill pipe or magnetic rock formations
• Lengthy field calibrations are not required prior to each survey
• Surface referencing is not required as it is true north seeking
• Drill collar azimuth does not need to be pre-determined
• Does not drift over time, each survey station is independent of the previous one