The room experimental results showed AMPS copolymers as a drilling fluid filtrate reducer had very good capacities of depressing the filter loss,inhibitory ability,heat resistance and salt tolerance.

• 室内试验结果表明 ,AMPS聚合物热稳定性好 ,降滤失能力、抑制性和抗温抗盐能力强 ,防塌效果好。