A method of directional drilling that significantly extends the distance between the surface location and the targeted subsurface reservoir. This specialized technique enables the exploitation of resources located far from conventional drilling sites, often reaching several kilometers horizontally from the wellhead. For example, a well might be drilled from onshore to reach oil or gas reserves located beneath the seabed.
The application of this technique allows for the recovery of hydrocarbons from otherwise inaccessible locations. Benefits include minimizing environmental impact by reducing the number of surface locations required, accessing reserves beneath environmentally sensitive areas, and optimizing infrastructure placement. Historically, the development of improved drill string technology, advanced directional control systems, and sophisticated drilling fluids have been critical in enabling its wider adoption.