The following diagrams show typical survey train configurations. When assembling any survey train, please be careful of the following; do not use pipe wrenches on the instrument and always check to make sure the battery compartment and data port plug are firmly closed to prevent water damage. Ensure the arrow on the instrument points into the hole (away from the drill rods or “push rods”).

Rod Insertion Surveying has similar applications to cable lowered surveying except it is usually used in shallow, horizontal and up-hole directions. In addition it can be used in conventional core barrel drilling in any direction.

The connector required in these configurations depends on your application. If the drill rods (like in conventional core barrel drilling) are used to move the instrument to the survey location then a drill rod sub connector is used. If “push rods” (usually plastic) are used then a custom connector for attaching to the “push rods” can be used. The “push rods” are typically used for inserting the survey train into the hole by hand when the drilling equipment (or mechanical rod pusher) is not available to be used.

Configurations

Configuration 1

Conventional core barrel drilling applications and holes that are close to the diameter of the instrument usually do not require centralization. Therefore the survey train only requires the following items;
 

Configuration 2

To increase accuracy in larger diameter holes, the female-female couplings are replaced by centralizers so you have the following items;