Sand control on a horizontal well is completely different from a vertical well.

This is particularly useful in shale formations which do not have sufficient permeability to produce economically with a vertical well.

In a special room with a concrete floor, a kind of stonework casing surrounded a vertical well.

And meanwhile a vertical receiver array with constant interval between receive is mounted in a vertical well.

Landfill gas can also be extracted through horizontal trenches instead of vertical wells.

The original vertical well is normally 00.

Forest Oil, which has several junior partners in the region, has drilled both vertical and horizontal wells.

The simplest design uses two vertical wells: one injection and one production.

Another alternative is to drill a lateral well connecting the two vertical wells.

Shale oil is then recovered through vertical wells drilled into the formation.