What is horizontal directional drilling method?

Horizontal Directional Drilling (HDD) is a construction technique whereby a tunnel is drilled under a waterway or other designated area, and a pipeline or other utility is pulled through the drilled underground tunnel. The drilling mud also helps coat the walls of the tunnel and remove drill cuttings.

What is horizontal drilling and why is it used?

Horizontal drilling is a commonly used technology because drilling at an angle other than vertically can stimulate reservoirs and obtain information that cannot be done by drilling vertically. Horizontal drilling can increase the contact between the reservoir and the wellbore.

What is HDD in construction?

Horizontal Directional Drilling (HDD) is a trenchless method of sewer construction. They use a drilling rig to drill a pilot hole and cut a path for the new sewer pipe. Crews install the new sewer pipe from the surface through the sending pit and then pull it through the cut path at the receiving pit.

What are the different types of horizontal directional drilling?

Horizontal directional drilling machines are divided into three categories large-diameter HDD (maxi-HDD), medium-diameter HDD (midi-HDD), and small-diameter HDD (mini-HDD). There is no significant difference in the operation of these systems.

Is horizontal drilling directional drilling?

Horizontal Directional Drilling (HDD) is a method of installing underground pipelines, cables and service conduit through trenchless methods. It involves the use of a directional drilling machine, and associated attachments, to accurately drill along the chosen bore path and back ream the required pipe.

What is the difference between vertical and horizontal drilling?

Like the name, horizontal wells are drilled from the side. Vertical wells drill downward, but horizontal well is drilled off of a vertical borehole. Specifically, a well is horizontal if it’s dug at an angle of at least eighty degrees to a vertical wellbore.

How far can you horizontal directional drill?

Maximum lengths and hole diameters are determined by project specific geotechnical conditions however effective outside range for heavy rig horizontal directional drilling is 3,000 m (9,843′). Light rigs are typically used for crossings between 50 m and 1,000 m (164′ – 3,281′).