Acél-Vakond Útátfúrás

Go to content

Directional drilling


Directional boring is used for installing infrastructure such as telecommunications and power cable conduits, water lines, sewer lines, gas lines, oil lines, product pipelines and environmental remediation casings. It is used for crossing waterways, roadways, shore approaches, congested areas, environmentally sensitive areas, and areas where other methods are costlier. It is used instead of other techniques to provide less traffic disruption, lower cost, deeper and/or longer installation, no access pit, shorter completion times, directional capabilities, and environmental safety.

The system uses a removable drill head matched to soil conditions by the operator and a series of drill stems to push and rotate the head. Directional drilling involves steerable systems for installation of small- and larger diameter pipelines. The method involves a two-stage process:

The first stage consists of drilling a small diameter pilot hole along the desired centerline of the proposed line. In the second phase, once the pilot bore is completed, a reamer/backreamer is attached to the drill system string and pulled back, to enlarge the bore wall to comfortably accommodate the product wire, conduit or pipe that is subsequently pulled into place. Sometimes the enlargement process may involve several steps, where the desired diameter is obtained gradually. Location and guidance of the drilling is a very important part of the drilling operation, as the drilling head is under the ground while drilling and, in most cases, not visible from the ground surface. A transmitter, behind the bore head registers angle, rotation, direction and temperature data. This information is encoded into an electro-magnetic signal and transmitted through the ground to the surface in a walk-over system. At the surface a receiver is manually positioned over the transmitter, the signal decoded and steering directions are relayed to the bore machine operator.

Costs-effective benefits of directional drilling

  • fast installations method
  • boring without breaking
  • no earth moving
  • no disruption to surface
  • no disruption to traffic
  • no recovery works
  • in one phase more pipes can be pulled in

Ecological benefits

  • only punctually disruption in surface

Home | Our Company | Profile | Contact | Gallery | References | Career | Site Map

Back to content | Back to main menu