Users Manual

FIELD EQUIPMENT
NUSEIS
Geophysical Technology Inc Field Equipment Page | 66
NRU Threading
• The NRU Threading is an add-on device that adds a screw like threading to an NRU.
• The threads aid in planting the NRU and create more surface area for coupling.
• Using a custom built tool with either the PDT-B, PDT-H or a hand tool, the NRU can be screwed
into place. The drill should be capable of normal rotary operation and not be used in hammer
mode for this operation.
Figure 57