In addition to hydraulic fracturing of vertical wells, it is also performed in horizontal wells.

Horizontal wells proved much more effective than vertical wells in producing oil from the tight chalk.

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

Instead, water is obtained using vertical wells and electric pumps allowing grain to be grown using a center pivot irrigation system.

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

Corridor has drilled two vertical wells that tested gas from the Frederick Brook.

The shale gas was originally produced through vertical wells, but operators are increasingly going to horizontal wells in the Fayetteville.

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.