دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The phenomenon that nature gas enters into another formation or overflow the surface through circline cement mantle between casing and formation.

n: See annular gas channeling.

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: The creation of voids in the cement between the casing and the borehole, thereby reducing the effectiveness of the cement bond.

n: when casing is being cemented in a borehole, the cement slurry can fail to rise uniformly between the casing and the borehole wall, leaving spaces, or channels, devoid of cement. Ideally, the cement should completely and uniformly surround the casing and form a strong bond to the borehole wall. See cement channeling.

n: See cement channeling.

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.

n: Schlumburger wireline tool that uses a single rotating ulrtasonic sensor to provide a complete image of the casing ,cement,and annulus .Can show casing damage/corrosion ,cement quality and channeling.