دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

allowance for funds used during construction.

n: US organisation that sets standards and specifications for ships and ship equipment manufactured in the United States. The organisation also makes inspections during offshore rig construction and conducts periodic surveys to ensure that requirements for classification are maintained. Its official publications are Records of the American Bureau of Shipping and ABS Activity Report. Address: 2 World Trade Centre;106th floor;New York, NY 10048;(212) 839- 5000.

n: serves as clearinghouse for nationally coordinated voluntary standards for fields ranging from information technology to building construction. Address: 11 W. 42nd Street, 13th floor;New York, NY 10036;(212) 642-4900.

n: in pipeline construction, a combination of anchors used to hold a lay barge on station and move it forward along the planned route. Lay-barge anchors may weigh in excess of 20 tons (18 tonnes),and a dozen or more may be needed.

n: a welding technique for joining pipe ends. Two general types of automatic welding used in pipeline construction are submerged-arc welding and automatic wire welding.

n: The target reflecting drilling speed. It is expressed with average hours or days of completing a well. The equation is : average construction of completed well=the sum of every construction completed well/the number of completed wells.

n: in pipeline construction, a cylindrical device fitted on both ends with hollow cutting teeth, used in directionally drilled river crossings. Used during the p111- back portion of a crossing effort, the barrel reamer opens the hole and keeps the pull on course.

n: the first cross-country pipeline with a 24-inch (61-centimetre) diameter. The 1,340-mile (2,157 -kilometre) Big Inch was begun in 1942 with government financing as a part of an emergency construction program (War Emergency Pipelines) to meet the demand for petroleum products during World War II.

n: a cement wiper plug that precedes cement slurry down the casing. The plug wipes drilling mud off the walls of the casing and prevents it from contaminating the cement. See cementing, wiper plug. bottompull method n: an offshore pipeline construction technique in which the pipe string remains below the surface while it is towed to its final location.

n: See bottom wiper plug.

in cementing, the first plug pumped in cementing with the two plug system. It isolates the mud and cement slurry and allows passage of the cement slurry when the plug “bumps” or reaches the float shoe or float collar. It is hollow with a diaphragm that is

n: in pipeline construction, a pipestraddling device, fitted with nozzles, spoil from beneath the pipe is removed and pumped to one side of the trench. The line then sages naturally into position in the trench.