Generally, the performance of scale inhibitor is impacted by the pH, temperature, calcium and magnesium ion levels and the presence of other chemicals in the scaling brine mixtures.Effective polymers tend to have a low molecular weight (typically 1000 – 5000) and have regularly spaced ionisable groups. These compounds have excellent thermal and hydrolytic stabilities. The most common classes of polymeric scale inhibitors includes polyacrylates, polyphosphinocarboxylates, polymalates, polyvinylsulphonates and polyacrytamides.Polymeric scale inhibitor usually stops or interferes with inorganic scale nucleation, precipitation and adherence to production conduit, completion system or processing facilities susceptible to scale problems in the oilfield applications. By modifying or distorting crystal shapes, the low molecular weight polymers prevent scales from growing and adhering to equipment surfaces.