دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a calcite-rich sediment that may give rise to shaly limestone.2. a drilling mud that is treated with lime to provide a source of soluble calcium in the filtrate to obtain desirable mud properties for drilling in shale or clay formations.

n: a fracturing method in which fracturing fluid is injected into the formation through a limited number of perforations (i.e., fluid is not injected through all the perforations at once;rather, injection is confined to a few selected perforations). This special technique can be useful when long, thick, or multiple producing zones are to be fractured.

n: the reduction in the quantity of natural gas flowing through a pipeline that results from leaks, venting, and other physical and operational circumstances.

n: a bolt that secures elevators in the bail. Manufactured with the nut end toward the derrickhand so that workers can monitor the nut pins when latching and unlatching elevators during a trip.

n pi: on a top drive, a device that, when actuated by the driller, tilts the units built-in elevators into a position to make it easy for crew members to latch the elevators onto a joint of pipe stored in the mousehole. See top drive.

n: the shipboard procedure of collecting and settling water and oil mixtures. It results from ballasting and tank-cleaning operations (usually in a special slop tank or tanks) and the subsequent loading of cargo on top and the pumping of the mixture ashore at the discharge port. v: to commingle on- board quantity with cargo being loaded.

n: (LEPC) a local community committee required under SARA. Committee members are approved by the SERC and include elected state and local officials;police, fire, and public health officials;environmental advocates;hospital and transportation officials;industry representatives;community groups;and the media. The function of the LEPC is to develop an emergency response plan that will be implemented if a hazardous material is released in the community.

n: unstratified, homogeneous accumulation of silt, often containing small amounts of clay or sand and redeposited by wind from glacial outwash or deserts.

deposits of windborne dust.