دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pl: the characteristic patterns for various degrees of cement bonding between the casing and the borehole that appear on an oscilloscope display when a sonic cement bond log is made.

n: 1. a substance whose particles are so fine that they will not settle out of suspension or solution and cannot be seen under an ordinary microscope. 2. the mixture of a colloid and the liquid. gaseous, or solid medium in which it is dispersed.

n: A particle smaller than 2 microns. The size and electrical charge（电荷） of these particles determine the different phenomena observed with colloids, for example, Brownian movement.

a substance with particle size so fine that it exists as a stable dispersion rather than settling out.

adj: pertaining to a colloid. i.e., involving particles so minute (less than 2 microns) that they are not visible through optical microscopes. Bentonite is an example of a colloidal clay.

a device that uses a black light for identifying hydrocarbons on cuttings.

n: a wheel or disk mounted to spin rapidly about one axis but free to rotate about one or both of two axes perpendicular to each other. The inertia of the spinning wheel tends to keep its axis pointed in one direction regardless of how the other axes are rotated.

n: a wheel or disc mounted to spin rapidly about one axis,but free to rotate about one or both of other two axes.the inertia of the wheel keeps the axis aligned with the reference direction (true north).

n: a business undertaking, usually of more limited scope and length than a partnership, in which control, profits, losses, and liability are all shared.

a project in which two or more parties are involved. Funding may be in direct money or work-in-kind.

n: 1. a caliper for making precise measurements;a spindle is moved by a screw thread so that it touches the object to be measured. 2. an instrument used with a telescope or microscope to measure minute distances.