A wiper plug seal is a critical sealing element used in cementing operations to ensure proper fluid displacement and zonal isolation in oil & gas wells.

1. What Is a Wiper Plug?

A wiper plug is a rubber-based tool launched during cementing to:

Separate drilling mud from cement slurry

Wipe the inner wall of the casing clean

Prevent fluid contamination

Indicate displacement completion (via pressure bump)

It is commonly used in primary cementing and liner cementing operations.

2. Seal function:

Create tight interference with casing ID

Maintain differential pressure during displacement

Prevent bypass and channeling

3. JST materials like:

NBR (standard wells)

HNBR (HPHT wells)

FKM (extreme temperature)