Rubber Cementing Plugs are engineered for greater reliability. The Top Rubber plug and Bottom Rubber Plug are of the same basic design with firm wiping action provided by five wiping surfaces. Our design of top and bottom plugs provides a sure seal against the casing wall to prevent mixing of cement slurry and displacement fluid. The Top Plug seats into the Bottom Plug and seals against it to lessen the possibility of additional cement slurry displacement, while also promoting good bonding at the bottom of the casing.

Working Of Cement Plugs
Rubber Cement Plugs plays a vital role during cementing operations. Plugs minimize the contamination of cement by removing dispersed mud and mud sheath from the casing inner diameter.
Before the cement slurry and behind the space, a bottom rubber plug is pumped. As the plug moves down the string, it removes the left dispersed mud from the inner diameter of the casing.
A diaphragm on the plug gets ruptured due to the pressure exerts when the bottom plug seats are at the float collar. This helps cement to flow through it.
It twists the corner of the hole or toe end, located at the bottom of the horizontal well. The annular space between the casing and the formation is then filled.
By this way, after the full volume of cement has been pumped, a top rubber plug is dropped and pumped behind the slurry.
The top plug then removes the left over cement from the inner diameter of the casing and reaches at the float collar.
It then rests on the bottom plug to cause a pressure. It also indicates that the cement has been displayed.
Both the top and bottom plugs are always different. Bottom plugs are red while top plugs are black.