Drilling fluids QA/QC - Quality Control of Barites
The following tests shall be carried out, or fully supervised, by the Mud Engineer, to determine the quality of barites delivered to the rig.
Barites shall be sampled using the same method as outlined for cement above.
Contamination of barites by bentonite is determined simply by the fact that severe gellation will occur when the sample is mixed with distilled water.
After drilling 16in/17.1/2in hole the bulks are to be very clean from bentonite before receiving any barite. The following . . .