Sized barite as a weighting agent for drilling fluids

摘要: An additive that increases the density of fluids used in a wellbore during construction or repair oil, gas, injection, water, geothermal wells comprises fluid containing sized barite weighting agent has an increased with improved suspension stability without significant viscosity increase. The as described herein rheological properties comparable to conventional but does not exhibit problems sag and resulting variations density. illustrative embodiment claimed subject matter is further directed method for making using such fluid. In one preferred particle diameter between 4 μm 15 μm. another embodiment, D 50 (by weight) approximately 1 6 90 8 may be any drilling, cementing, completion, packing, work-over (repairing), stimulation, well killing, spacer