How does Oilwell Cementing work?
In contrast to common cementing jobs above ground oilfield operations face additional challenges: These are related to the special process, applied and especially with elevated temperatures and pressures downhole. Contaminations from the formations pose additional problems. The first step of oilwell cementing is pumping the cement slurry downhole through a tubing. Then the slurry is squeezed upwards in the annulus between casing and formation wall, filling all void spaces. This procedure results in pumping distances of several thousand feet. While the slurry gets hot with increasing depth, it cools down again during the squeeze process.
