Gypsum/ Polymer Mud
Surface sections can be drilled with a gypsum/polymer water based mud. Attention must be paid to preserving the inhibitive properties of the drilling fluid by maintaining appropriate polymer and gypsum concentrations in the mud. Particular attention must be given to solids control by optimising the operation of the solids control equipment in order to minimise mud maintenance requirements.
BARITE Weighting agent.
GYPSUM To provide a source of soluble calcium ions for shale inhibition.
IDVIS A pure grade xanthan gum, for providing yield point and progressive gel strengths . . .