MANUAL – REFLEX EZ-TRAC™ | 70
Load tell tale
1. Put the lead tell tale (or other suitable material) into the hole in the
upper end of the slits on the mule shoe.
10.6.5 Run into hole
When the wedge has been positioned in the borehole, the survey
system is run into and recollected from the borehole using one of the
surveying methods described in the chapter Surveying methods.
Depending on surveying method, the survey system may also need to
be equipped with a pin spear assembly, a landing collar box type, a
core adapter and/or a swivel.
For the Magnetic Tool Face mode, 9 meters of non-magnetic drill
rods are also needed to avoid magnetic interference. These rods
shall go into the rod string behind the bit or hammer and the survey
system shall sit in the middle of the non-magnetic rods.
Note, the REFLEX EZ-TRAC™ has to be initialised before the
instrument is run into the hole. Please refer to the section Initialise
instrument above.
10.6.6 Execute downhole survey
The downhole survey is performed when the survey system has
landed and is stationary in the mule shoe sleeve.
Figure 82 Execute downhole survey
Execute downhole survey
1. When the survey system is stationary at the survey station, select
MEASURE on the
REFLEX™ EZ-COM unit.
2. Do not move the instrument while ‘Measuring’ is displayed.
3. To redo the measurement, select REDO. Note, previous
measurement will be replaced.
4. To end the survey, select END.
5. Retrieve the survey system from the borehole.
10.6.7 Verify lead tell tale
When the survey system has been retrieved from the borehole, verify
that the lead tell tale indicates a successful landing in the mule shoe
sleeve. If not, you must redo the downhole survey.
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