دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the platform built in taele areas,used to isolate and protect the taele

n: refer to drill string failture

n: the visual observation,tool survey and mater flaw detection to all assembly of drilling pipe in order to find the flaw before drilling preventing fault

n: a method of lubricating a chain-and-sprocket drive in which a reservoir drips oil onto the chain at 4 to 20 drops per minute, depending on the speed of the drive. A drip lubricator for a multistrand drive has a pipe to distrioote the oil to all strands.

n: on an engine, a device that contains an air filter element that does not depend on oil to effectively filter the air entering the engine. Instead, the filter element has a number of folds and chambers that bap dust and dirt going into the engines air intake. Some dry elements may be cleaned and reinstalled;others are discarded and replaced. Compare wet air cleane1:

n: the use of air as the only injected heat carrier during an in situ combustion operation. See in situ combustion. The main difficulty with dry combustion is that about 80 percent of the injected heat is lost to the formation. Compare wet combus- tion.

n: a drilling operation in which no fluid is circulated back up to the surface (often as a result of lost circulation). However, fluid is usually circulated into the well to cool the bit. See blind drilling.

n: drilling without drill fluid cycling out of the well

n: a kind of preventer with two multi-effect blowout preventer
,and the bottom of the upper one is inserted in the top of the lower one so as to decrease the depth of thid equipment and improve the link intensity between them

n: a log designed to provide the resistivity measurements necessary to estimate the effects of mud filtrate invasion into the formation surrounding the wellbore so that more reliable values for the the formation resistivity may be obtained. The resistivity curves on this log are made by deep-, medium-, and shallow-investigation induction. Visual Observation of the dual induction focused log can give valuable information regarding invasion, porosity, and hydrocarbon content. The three curves on the log can be used to correct for deep invasion and obtain a better value for formation resistivity. Compare induction survey.