Analysis of cementing plug function

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The function of the rubber plug is; When all the cement slurry is filled, press the plug and it goes down against the cement slurry to scrape off the cement slurry adhering to the inner wall of the casing, prevent the displacing drilling fluid from mixing with the cement slurry, avoid the cement slurry pollution at the end, and ensure the cement cement quality at the bottom. When the choke plate is reached, the bump is displayed and the cementing operation is over.





The function of the rubber plug is to release the rubber plug before filling the mud, which is used to separate the cement paste from the pre-liquid. Reduce the pollution of slurry injection in casing. At the same time, wipe the drilling fluid adhering to the casing wall and push it in front of the rubber plug. When the plug reaches the choke plate, a small pressure can be applied to break the rubber diaphragm at the part of the plug, so that the cement slurry flows through the plug and is displaced into the annular space between the casing and the shaft wall through the attachment such as a short swirl connection.