دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a piece of equipment that connects pipe, flanges or other equipment with different root threads or connection mechanisms.

a cryptocrystalline form of quartz with waxy luster.

n: a rock of precipitated silica whose crystalline structure is not easily discemible and that fractures conchoidally (like glass). Flint, jasper, and chat are forms of chert.

a hard, silicate sedimentary rock. Similar to flint, but with less ordered structure. A cryptocrystalline form of quartz.

a common zeolite mineral with sensitivity to some surfactants.

n: a reaction in which gamma rays with intermediate energy levels (0.6 to 2.5 million electron volts) lose their energy by colliding with orbital electrons.

a gamma-ray reaction in which the gamma-ray, after colliding with an electron, shifts some energy to the electron. The higher the energy loss by Compton scattering in a zone, the higher the electron concentration or density. The basis for the density log.

n: a condition resulting from the formation of gas bubbles in a divers blood or tissues during ascent. Failure to rid tissues of the inert gas may cause a wide variety of symptoms, including pain, nausea, paralysis, unconsciousness, temporary blindness, and even death. Also called the bends.

n: the drilling control equipment installed up of the collar ,and composed mainly by drilling through fitting, adaptors and preventer

n: a research project made by Amoco ,including diamond compact bit,the rotate speed upto more than 1000r/m and surface drill stem feeding equipment which is controlled by computer

n: a kind of steel tooth bit with friction bearing coated with silver copper hardener ,the rotate speed upto 140-200r/m