دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a channel in the cement, usually caused by poor displacement of drilling mud.

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 devoid of cement. Ideally, the cement should completely and uniformly surround the casing and form a strong bond to the borehole wall.

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: 1. a cementing operation in which cement is pumped behind the casing under high pressure to recement channeled areas or to block off an uncemented zone. 2. the increasing of external pressure on a divers body caused by improper diving technique.