دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: short-period waves formed by the contact of wind on the ocean surface.

n: a specification used to indicate the resistance of a derrick to the force of wind. The wind-load rating is calculated according to API specifications. Typical wind resistance in derricks is 75 miles per hour with pipe standing in the derrick and 115 miles per hour or higher without.

n: It be used to express the technical regulation of the derrick.

n: something that breaks the force of the wind. For example, canvas windbreaks installed around the outside of the rig floor on a drilling or workover rig afford the crew protection from strong, cold winds. Sometimes called a prefab.

n: a federal excise tax on crude oil. It has a different rate for oil in a number of categories, for example, newly discovered oil, stripper oil, and stripper oil produced by independents. The tax rate is determined as a percentage-for instance, at 25%---of the difference between a base price and a market price. There are a variety of exceptions and exemptions;interested parties should query the IRS or a tax accountant.

n: a set of conductors installed to form the current-carrying element of a dynamo or a stationary transformer.

n: a device on an anchor-handling boat that propels the anchor chain to and from a chain locker, where it is stored.

n: 1. a slotted opening or a full section removed in the pipe lining (casing) of a well, usually made to permit sidetracking. 2. a period during which an operation or action can be carried out, such as the drilling window that occurs in offshore Arctic areas in summer or winter.

n: The through hole be opened at some section of the downhole casing,which be used to side track.

an exit point of a lateral from a mother bore, generally a hole cut in the side of the casing to allow sidetracking the well. Can also be where the entire section of the casing is removed.

the allowable effective fluid density difference between the fracturing pressure and the pressures exerted by a fluid that are needed to control formation flow and the wellbore.