GeoVista Flexible Northseeking Fibre Optic Gyro System
Field Proven & Reliable
No calibration needed – no drift
Combinable with other Geophysical probes
Easy to use
Well Profiling & Surveying
Run in any environment
Real time results
Comes with Gyro running gear
High accuracy, flexibility and reliability offer loggers and drillers alike a new dimension in profiling wellbores. No calibration is needed as their is no drift and the option to run the probe on wireline, slickline, single shot, combined with other geophysical logging probes or in memory mode make this a truly extraordinary offering.
The ultimate solution in Wellbore Navigation.
The fibre optic gyroscope (FOG) provides extremely precise rotational information. Unlike the classic spinning-mass gyro, it has no moving parts and does not rely on inertial resistance to movement. Often due to their intrinsic reliability, FOGs are used for high performance space applications which is why Geovista chose to use this in their downhole logging Gyro.
The Gyro has an OD of 34mm so it is designed to run in any environment including inside drill pipe. The tool is run on wireline with real time readout at surface. The tool can also be run on memory mode. A magnetometer/inclinometer is also used within the sonde as well as the FOG. Directional data is collected at predetermined points downhole while the tool is stationary. The gyro can be connected to most other Geovista sondes and run in hole (logged separately unlike the verticality tool) and uses the same acquisition system at surface (GV Logger). The tool will output high accuracy azimuth and deviation data in any environment without the need for a calibration at surface.
There are many applications in borehole environments that require accurate information of the borehole trajectory and profile. Applications include:
Utility and pipeline crossings management, mining surveys, construction, Multi-well planning, slot-target allocation, prevent wellbore collisions, assures correct directional drilling operations, accurate target of resources, conformation of borehole trajectory, well planning, precise reservoir/resource delineation, accurate correlation with other logging measurements, resurvey existing wells to correct for survey errors, re-map resources, steering, orient downhole assemblies and resources, define orientation of logging tools, axis orientation of geophones and legal requirements.
Most importantly, accurate gyro surveys act to save costs from inaccurate and potentially catastrophic collisions, incorrect trajectory, bad well planning and missing reservoir targets.