1. Unidirectional pressure sealant for drilling fluid 1)�DCharacteristics : It is a kind of greyish yellow powder made of many kinds of natural fiber, filling particles and additives at the appropriate proportion, if you add this products when dril... - Update: 2009-11-05

The barite (BaSO4) is brightly pure crystals. Color is variable but is commonly found colorless or white, also blue, green, yellow and red shades. The barite is mainly used for petroleum and natural gas welldrilling. The hardness is 3-3.5. The specif... - Update: 2009-11-05