Modification and performance evaluation of Konjac gum in drilling fluid

Abstract Because of the rock carrying property drilling fluid, it is usually necessary to add bentonite and polymer into fluid improve viscosity fluid. However, will seriously affect rheological property, sand speed, degassing effect, etc. Therefore, develop a new environment-friendly low cutting agent for In this paper, konjac gum was modified by metal complexation. Some were studied. The effects different dosages on properties analyzed through infrared spectrum characterization, thermogravimetric analysis compatibility evaluation. experiment proved that heavy cations inorganic flocculant polyaluminum chloride/iron can coordinate with gum, form cation glucomannan chelate system, which enhances three-dimensional network structure molecule; shielding effect weaken electrostatic repulsion between -O- in compete each other, thus affecting properties. not only improves its aqueous solution but also water solubility. operation process simple green.