دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: one of the extremely small particles of an atom that is ejected from a radioactive substance (such as radium or uranium) as it disintegrates. Alpha particles have a positive charge.

an engineered sequence of choke settings in the start-up of a well to apply stresses in the formation in a manner that will strengthen the formation and avoid failure.

n: one of the extremely small particles, sometimes called rays, emitted from the nucleus of a radioactive substance such as radium or uranium as it disintegrates. Beta particles have a negative charge.

an electron emitted with high energy and velocity from a decaying nucleus.

borehole pressure integrity.

n: an integral part of a blowout preventer. which serves as the closing element on an open hole. Its ends do not fit around the drill pipe but seal against each completely. See ram.

n: a high-integrity valve with double seals and with provision for determining whether either seal leaks.

n: The drill fluid which is not displaced by cement slurry due to high consistency of drill fluid in cementing. Channeling will destroy integrity of cement column and effect cement job quality.

n: a category of actions that do not individually or cumulatively have a significant effect on the human environment and that have been found to have no such effect in procedures adopted by a federal agency when implementing NEPA regulations. Therefore, neither an environmental assessment nor an environmental impact statement is required.

n: the maximum lawful price that may be charged for the first sale of a specified NGPA category of natural gas. cellar n: a pit in the ground, usually lined with concrete, steel pipe, or wood, that provides additional height between the rig floor and the wellhead to accommodate the installation of blowout preventers, rathole, mousehole, and so forth. It also collects drainage water and other fluids for subsequent disposal.

n: part of a company that interprets and processes the charts. The departments responsibilities include calculating the gas flow from the information on the chart. Today, charts have been largely supplanted by electronic readouts generated by computer controlled sensors at the orifice meter station. These readouts are transmitted to the companys computers in a central, or district, office, where they are recorded and read.