دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: workers responsible for tie- in tasks in the construction of a pipeline.

n: a federal form used by companies or individuals for submitting annual inventory data on hazardous chemicals or extremely hazardous substances. See SARA Title III.

n: Casing string be trip in the wellbore that its diameter smaller than the diameter of bit,then the casing string cannt trip in or pick up readily.

n: an emulsion that is relatively difficult to break. Compare loose emulsion.

n: a petroleum- or waterbearing formation of relatively low porosity and permeability.

n: The oil-bearing formation or water-bearing formation of low porosity and permeability.


non specific term meaning lower permeability.

natural gas held in reservoirs of low permeability that cannot be accessed in an economically reasonable time by natural flow methods. Hydraulic fracturing is required to create formation exposure sufficient to produce the gas.

n: 1. a well about which information is restricted for security or competitive reasons. 2. a section of the hole that, for some reason, is undergauge. For example, a bit that is worn undergauge will drill a tight hole.

n: A section of a wellbore, usually openhole, where larger diameter components of the drillstring, such as drillpipe tool joints, drill collars, stabilizers, and the bit, may experience resistance when the driller attempts to pull them through these sections

an exploration well or other project where information is not released to the public.

n: The phenomenon that drill tool touch sticking when be picked up.

n: sand or sandstone formation with low permeability.

low permeability formation.

n: a section of a borehole in which excessive wall cake has built up, reducing the hole diameter and making it difficult to run the tools in and out. Compare keyseat.

n: The well section that its diameter reducing because mud cake over thick or layer swelling.

a restricted place in the bore hole, caused by wall cake, dog leg, deviation change or other factor.