| abstract |
A drilling fluid, spacer fluid and cementing compositions for use in subterranean wells are disclosed along with methods for making using same, where the compositions include a particulate weighted elastomeric composition system including at least one higher density weighting agent and at least one elastomer, where the higher density weighting agents have a density of at least 5.0 g/cm 3 and conventional weighting agents, to produce compositions having a desired high density, while retaining other fluid properties such as pumpability, gas tight sealing, low tendency to segregate, and reduced high temperature cement strength retrogression. |