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"Open Hole" surveys
using Cable Lowering method.
A cable swivel is attached to a spacer rod at
the top of the survey train.
Centralizers specific to your hole diameter
are attached to each end of the e-SYNC.
A second spacer rod is attached to the bottom centralizer, and then to a
plastic impact foot.
This assembly is capable of surveying holes from vertical (-90º) to -35º.
In flat holes and up holes a "rod
insertion" method would be required.
"Open Hole" surveys
using Rod Insertion method.
Drill rod lowering or insertion techniques
are used where instrument retrieval is uncertain in steep holes, or if
gravity cable lowering is not possible.
The cable swivel at the top of the survey
train would be replaced with a special connector.
This connector can be a drill rod box
thread to Pajari aluminum rod pin thread or custom manufactured to match
plastic piping or push rods that can also be used to insert the survey
train.
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