دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a type of mobile offshore drilling unit (MODU) that has a part of its structure in contact with the seafloor when it is on site and drilling a well. The remainder of the rig is supported above the water. The rig can float. however, allowing it to be moved from one drill site to another. Bottom-supported units include submersible rigs and jack up rigs. See mobile offshore drilling unit.

n: a drilling platform that rests on a steel or concrete caisson. Used mainly in the Arctic, caissontype drilling platforms are mobile offshore drilling units built to withstand the ravages of moving ice in Arctic waters.

n: a type of mobile offshore drilling unit that floats and is not in contact with the seafloor (except with anchors) when it is in the drilling mode. Floating units include barge rigs, drill ships, and semi-submersibles. See mobile offshore drilling unit.

n: the interior capacity of a ship or a mobile offshore drilling unit. The capacity is expressed in tons, although the actual measurement is in volume, 1 ton being equivalent to 100 cubic feet of volume. This rule holds for measuring ship capacity for US maritime purposes. All principal maritime governments have their own rules describing how tonnage is to be measured.

n: (MODU) a drilling rig that is used exclusively to drill offshore exploration and development wells. It floats on the surface of the water when being moved from one drill site to another. but it mayor may not float once drilling begins. Two basic types of mobile offshore drilling unit are used to drill most offshore wildcat wells: bottom-supported off- shore drilling rigs and floating drilling rigs.

abbr: mobile offshore drilling unit.

Mobile Offshore Drilling Unit.

n: an assistant toolpusher whose duty hours are typically during nighttime hours on a mobile offshore drilling unit.

an assistant toolpusher. Also known as a tour pusher.

n pl: (SOLAS) international maritime rules established to set minimum safety standards for ships and mobile offshore drilling units under way or under tow.

n: usually a single well drilled offshore by a mobile offshore drilling unit to produce hydrocarbons from the outer fringes of a reservoir that cannot be produced by primary development wells drilled from a permanent drilling structure (such as a platform rig). Sometimes, several satellite wells will be drilled to exploit marginal reservoirs and avoid the enormous expense of erecting a platform.

n: (USCG) an agency of the United States Department of Transportation that establishes regulations for offshore vessels and approves standards for plan approval, construction, operation, and inspection of the hull, machinery, electric systems, industrial systems, and safety and lifesaving equipment of mobile offshore drilling units. The agency conducts rig stability tests, awards the original certification of the rig, and conducts annual inspections. It also establishes manning and personnel licensing requirements and investigates casualties. Address: 2100 Second Street SW;Washington, DC 20593;(202) 267-2229 or (202) 366-4000.