Single equation simplifies horizontal, directional drilling plans

The development of a single equation has simplified the planning of a two-dimensional well bore trajectory. The basic relationship can be modified easily for the various types of directional and horizontal wells. The particular geometry of each type of well bore defines the variables used in the equation. Directional drilling techiques have been used for many years to reach subsurface objectives overlain by inaccessible or difficult to reach surface locations. Economic and environmental considerations have increased the number of directional and horizontal wells drilled in recent years. Drilling numerous wells from a single location can also greatly simplify the installation of gathering and production facilities. Generally, horizontal and extended reach wells are drilled for economic reasons.