Geothermal Probe Laying 

The most common techniques for geothermal probe laying into soil are as follows:

  • Horizontal laying of a geothermal manifold (open-cut procedure with large scope of soil excavation).
  • Construction of a vertical geothermal manifold (vertical drilling followed by sinking a geothermal probe into a borehole).

Each technique has its advantages and disadvantages, but, in both cases, you cannot avoid significant soil excavation and use of heavy construction equipment.

As an alternative for these two techniques for geothermal probe laying, MEMPEX JSC offers a procedure for  "clustered" formation of a soil contour consisting of geothermal probes.

The principal objective of this procedure is to lay as more geothermal probes as possible from one point in various directions and at various angles. As a result, disturbances for surrounding areas are minimized.

Due to use of the  UNB-20 directional drilling rig and the OR-1.5 formwork, a cluster of geothermal probes in various planes with the radius up to 30 m can be built. Also, due to UNB-20 capability to implement pipe-jackings, controllable in terms of their plan and profile, no trenches are required to build a manifold running from a cluster of probes to a building.

- casing pipe diameter: 90 mm;
- tilt angle variation range: 0-75°;
- length of drilling with casing pipes: up to 30m  (depending on soils);
- controllable pipe-jacking range: up to 60m;
- dimensions of a pit for the  OR-1.5formwork: 2,5 х 2 m.

Geothermal probe laying with the UNB-20 unit and the  OR-1.5 formwork
Workflow illustrated step-by-step: