دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a mobile submersible drilling structure constructed of several steel cylinders or bottles. When the bottles are flooded, the rig submerges and rests on bottom;when water is removed from the bottles, the rig floats. The latest designs of this type of rig drill in water depths up to 100 feet (30.5 metres). See submersible drilling rig.

n: the pressure exerted on the bottom hull of a columnstabilised semisubmersible drilling rig when the hull is submerged to drilling water depth.

n: a zone, adjacent ot a continent, that extends from the lower waterline to the continental slope, the point at which the seafloor begins to slope off steeply into the oceanic abyss.

the shallow area out from shore to a water depth of about 450’.

n: in offshore operations. water depths greater than normal for the time and current technology.

n: offshore drilling operations in relatively deep oceans or seas. It presents a number of special problems related to water depth.

n: 1. the vertical distance from the ocean bottom to the nominal water level plus the height of astronomical and storm tides. 2. the deepest water in which an offshore drilling rig can operate.

n: a European term for the point on the bottom of a container that the dip weight touches during gauging and from which the measurement of the oil and water depths are taken. The dip point usually corresponds with the datum point, but any difference in levels must be designated in the calibration table.

n: pipeline construction in water depths of 100 feet (30.5 metres) or more.