SC can remarkably inhibited mud shale dispersion, keep the borehole wall steady.At the same time, on the base of inherent these, SC form hydrophobic property membrane on the drill bit and BHA.

• 实验表明，本文所研究的产物中具有一定分子参数的共聚产品耐盐、抗钙、耐温性好，具有较强的抑制性和润滑性以及降失水能力，是一种多功能的新型两性离子聚合物。