services
HSHA Rate Gyro
- In Rods RC/DDH Holes
To ensure maximum
directional data recovery we only survey
inside the Reverse Circulation (RC)
or Diamond Drill Hole (DDH) drill
rods with our HSHA
Rate Gyro.
A small pulley is attached to a lead rod
on the mast and raised to approximately
4m to allow the HSHA Rate Gyro to
be winched in and out of the hole safely.
We usually require a drill rig operator
present during our directional surveying.
The thin barrel configuration of the HSHA
Rate Gyro (42,3m) allows us to survey
inside 4" RC rods and inside BQ rod
string.
Once the HSHA Rate Gyro has determined the
initial azimuth it is run into the hole
in high speed mode at 50 meters per minute
recording directional data every 5m. In
areas where directional drilling or wedging
has occurred the interval is reduced to
every 1m producing high quality positional
data.
An independent QA test is performed at the
completion of every hole by taking a single
Gyro compass reading. The QA test is used
to check against the high speed mode. Acceptable
variations are +-0.5 degrees. Your guarantee
that our surveys are accurate.
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