Main Types Of Oil Drilling Additives And Their Functions

Weighting agent: mainly used to increase the specific gravity of drilling fluid, balance formation pressure, and prevent blowout accidents. Common weighting agent is barite (BaSO4)
Fluid loss reducer: reduce the loss of drilling fluid into the formation and protect the safety of the wellbore. Common fluid loss reducers include carboxymethyl cellulose, hydroxyethyl cellulose and modified starch, etc.
Dispersant: used to break up the spatial network structure in the drilling fluid, reduce viscosity and shear force, and improve the fluidity of the drilling fluid. Commonly used dispersants include lignin sulfonate and its complex, etc.
Viscosifier: such as DD-2000 and DD-955, used to increase the viscosity of the drilling fluid, ensure that the cuttings can be smoothly carried to the ground, and prevent accumulation at the bottom of the well
Application scenarios and effects
Oil drilling additives play an important role in the drilling process. They can improve the ability of drilling fluid to suspend and carry cuttings, reduce the loss of drilling fluid to the formation, maintain the stability of the well wall, and prevent the well wall from collapsing. In addition, the additive can reduce the torque of the drill rod, extend the life of the drill bit, and prevent problems such as hole collapse and diameter reduction.