Floating Offshore Drilling Rig
Definition - What does Floating Offshore Drilling Rig mean?
A Floating Offshore Drilling Rig is a machine structured to drill exploration and development wells from mobile offshore. It is also used as a temporary storage facility for oil and natural gas. Depending on the depth of water and the remoteness of the area, a different type of a rig is used. The rig can be a jackup that is up to 400 feet of water, semi-submersible, or drillship that is up to 12,000 feet of water.
Petropedia explains Floating Offshore Drilling Rig
During the exploratory drilling phase, the aim is to find out if oil is present in the particular location or not. If the location comes out to be affluent, then the organization has to bring a large structure known as a drilling rig. A Floating Offshore Drilling Rig is a large structure that helps in drilling offshore wells, so as to extract and process natural gas or oil. However, it takes a few months to size up the location. A Floating Offshore Drilling Rig along with the work space, provide an option to temporarily store oil or gas until the oil or gas is brought to the shore for refining and marketing.
A Floating Offshore Drlling Rig can be a structure in the form of a jackup, semi-submersible or drillship. A jackup is a self-elevating rig with three or four legs that are movable and can be enlarged above or below the drilling deck. A semi-submersible never rests on the sea floor like a jackup rig; it floats on water when the rig is moved. Seawater is pumped into the pontoons and columns to partially submerge the rig when the drill site is found. A drillship is a maritime vessel fitted with drilling apparatus. For exploratory drilling of natural gas or oil wells in deep water, a drillship is used; it can drill in water depths up to 3,700 m.