Offering petroleum assistant:

1. Unidirectional pressure sealant for drilling fluid Application Unidirectional pressure sealant for drilling fluid is suitable for all conditions of micro-fracture and stratum leakage filtration.

This products have good compatibility, can be used with all drilling fluid and competition fluid of different system and different density, sealing the leakage effectively, and it can improve the quality of the mud-cake, reduce water loss. Recommendatory dosage: 4%

2. Plugging agent: Composite plugging agent (plugging while drilling) is made from nature polymer based composite, it can be used well in drilling. Because it swells when meets with water, so it has the capacity of plugging, it also has strong adhesive ability, compared with traditional plugging agent, it can be used more expediently, it can combined with all mud system to plug the thief zone and protect low-pressure production zone (oil, nature gas, water etc.