دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: according to the point of mathe, when establishing the model of drilling, some parameters can not change, that is to say , that is non controllable.

a fluid with a viscosity that does not produce a linear shear stress-shear stress graph.

nj: any drilling fluid, usually oil-base or invertemulsion muds, whose continuous phase dose not co9nduct electricity, e.g.oil. The spontaneous potenial and normal resistivity can not be logged, although such other logs as the induction, acoustic velocity etc

n: the legal view that states that minerals such as oil and gas cannot be owned in place but rather must be brought to the surface before they can be owned. Also called nonownership, nonownership in place.

n: a provision in a joint operating agreement that allows parties who consent to later operations to penalize parties who do not consent. The penalty can be arranged in various ways but, to be effective, it assumes the productiveness of the proposed operation.

n: in commercial transactions, a product meeting GPA specification for commercial butane and, in addition, containing a minimum of 95 liquid volume percent normal butane. Chemicall, normal butane is an aliphatic compound of the paraffin series with the chemical formula C4H10 and all of its carbon atoms joined in a straight chain.

n: the smooth, uninterrupted circulation of drilling fluid down the drill stem, out the bit, up the annular space between the pipe and the hole, and back to the surface. Compare reverse circulation.

n: the circulation that the fluid from the the volume, bit and annular and reture to the ground evenly and perpetual.


circulation down the tubing and up the annulus.

n: a dip-slip fault along which the hanging wall has subsided relative to the footwall.

a fault with mostly vertical movement.

n: the pressure developed by a column of fluid as the depth of the column increases when the column contains a fluid of normal density. This gradient varies from area to area, but along the Gulf Coast of the United States, it is considered to be 0.465-0.468 psi/foot (10.53-10.59 kPa/metre),which is the pressure develped by the salt water that naturally occurs in the formations of this area. See also normal formation pressure.