دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The drill fluid which is not displaced by cement slurry due to high consistency of drill fluid in cementing. Channeling will destroy integrity of cement column and effect cement job quality.

n: an acoustic logging method based on the fact that sound travels at different speeds through materials of different densities. The fact that sound travels faster through cement than through air can be used to determine whether the cement has bonded properly to the casing.

n: Reflect the quality of cement bond after cementing. Used to check cement job quality.

a sonic log that determines the top of the cement column and estimates the quality of the cement bond between the casing and the formation. Works on transmission of a sound wave and identifies areas that conduct the wave and those that do not (free pipe r

n: Including the cemented condition of cement, casing and formation, isolation of oil, gas and water and cement top. Usually checked by bond log and casing pressure test.

n: the degree of superior and inferior of the drilled wellbore ,mainly including the wellbore quality ,core recovery, cement job quality and complete quality