(January 2017) In the oil and gas industry, a drill bit is a tool designed to produce a generally cylindrical hole (wellbore) in the earthâs crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas. This type of tool is alternately referred to as a rock bit, or simply a bit.
Printer Friendly Version (PDF). Verbenas are long blooming annual or perennial flowers that possess the virtues of heat tolerance and an extremely long bloom season. Many perennial verbenas are relatively short lived, but their vigor and heavy flowering make up for this defect.They do well grown as annual flowering plants also, since they bloom quickly during the first season after planting. âHomestead Purpleâ Verbena (Glandularia canadensis), known for its long bloom season.railing Verbena (Glandularia canadensis; formerly Verbena canadensis): Trailing verbena is a native perennial throughout South Carolina. The plants have a low spreading form and will flower profusely all summer.
Verbena. Verbena is a spreading plant ideal for cascading over retaining walls, pots, baskets, and window boxes. As log as the soil is extremely well drained, verbena will reward gardeners with countless clusters of small blooms all season.Superbena Burgundy Verbena) is a vigorous selection that bears rich burgundy flowers from spring to fall. It grows 12 inches tall and can spread 4 feet across as a groundcover. It will trail over the sides of a container or hanging basket.