دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a failure mode that can cause the cancellation-of or immediate-halt-to a project or event. Generally expressed as a percent probability.

n: a corrosion-resistant metal case in which a glass-stem thermometer can be placed to minimise the risk of breakage.

n: a length of pipe fitted over a wrench handle to increase the leverage of the wrench. Use of a larger wrench is usually preferred. Also called a snipe.

n: A pipe used to increase arm of force. Installed in the wrench or pipe tongs.

a length of pipe used on a wrench to extend the leverage. (HSE risk).

outcome of an event.

a sequence of nodes which are either a decision or an uncertainty, and outcomes associated with each mode. The purpose of a decision tree is to define the set of scenarios and the sequence of events that guide the evaluation of risk and return.

n: (DOE) a federal department set up to provide a frame- work for a complete and balanced national energy plan through coordination and administration of the energy functions of the federal government. It is responsible for longterm, high-risk research and development of energy technology, the marketing of federal power, energy conservation, the nuclear weapons program, energy regulatory programs, and a central energy data collection and analysis program. Address: 1000 Independence Ave. SW;Washington, DC 20585;(202) 586-5000.

an estimate using a single number value. It does not account for ranges in value or probability of occurrence for the parameter.

occurrence of a particular set of circumstances.

the amount of cement over that required to cement the zone. Usually between 30% and 100% depending on hole diameter unknowns and contamination risk.

the weighted average using probabilities as weights. For decisions involving uncertainty, the concept of expected value provides a rational means for selecting the best course of action and for forcasting portfolio level performance.