دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: threshold planning quantity.

terminal particle settling velocity.

tons per year.

n: the relation of a prover or a transducer calibration, through a step-bystep process, to an instrument or group of instruments calibrated and certified by a national or international primary standard.

the ability to trace the components of a product through out the supply and manufacturing system from raw material to finished and installed product.

n: a substance added to reservoir fluids to permit the movements of the fluid to be followed or traced. Dyes and radioactive substances are used as tracers in underground water flows and sometimes helium is used in gas. When samples of the water or gas taken some distance from the point of injection reveal signs of the tracer, the route of the fluids can be mapped.

chemicals placed in the flow stream of an injector to determine that the water takes from an injector to the producing wells.

n: a survey that uses a radioactive tracer such as a gas, liquid, or solid having a high gamma ray emission. When the material is injected into any portion of the wellbore, the point of placement or movement can be recorded by a gamma ray instrument. The tracer log is used to determine channeling or the travel of squeezed cement behind a section of perforated casing. Also called tracer survey.

a log that uses a spectral gamma ray and multiple marked sand tracers to analyze proppant placement.

n: a rare type of bit-tooth wearoccurring when the pattern made on the bot- tom of the hole by all three cones of a rock bit matches the bit-tooth pattern to such an extent that the bit follows the groove or channel of the pattern and drills ahead very little.

n: The summit and trace of tooth on the surface of bottom hole in cone bit drilling.

n: a direct current electric motor normally found in railway use, but frequently adapted to power certain drilling rigs.