Performance Evaluation of Blended Modified Konjac Gum in Drilling Fluid

In this paper, konjac gum was modified with lignin, and the effect of different dosage of modified konjac gum on the rheological properties of drilling fluid was analyzed through the evaluation of temperature resistance, salt resistance, inhibition and compatibility. The results showed that selecting 0.3% modified konjac gum as the optimal dosage for 4% calcium base mud. Konjac gum can be compounded with natural polymer materials or synthetic polymer materials to form the spatial network structure of molecules through the Supermolecule interaction between polymers. Modified konjac gum not only improves the rheological properties of its aqueous solution, but also enhances its water solubility. The konjac gum modified with lignin can improve the dynamic plastic ratio of the drilling fluid system without changing the filtration loss and lubrication coefficient, achieving the goal of low viscosity and high shear. The operation process is simple and environmentally friendly, providing a theoretical basis for the research of new environmentally friendly low viscosity drilling fluid cutting agents.