【摘要】 <正> 国外从60年代以后,聚丙烯酰胺及其衍生物广泛应用于钻井泥浆中,其品种愈来愈多,在泥浆中的作用也各不相同,如有的品种作为絮凝剂,有的品种作为稳定剂、分散剂,但对不同分子量、不同水解度的聚丙烯酰胺的应用范围观点尚有分歧。我国从1973年以来推广了新型的聚丙烯酰胺低固相泥浆,主要用聚丙烯酰胺作为絮凝剂,这种新型泥浆的使更多还原

【Abstract】 Laboratory experiment and field practice have shown that degree of hydrolysis of polyacrylamide has a marked effect on fluid loss control. Partially hydrolyzed polyacrylamide (PHP) with degree of hydrolysis above 40% gives better result. Mud viscosity increases with increase of the molecular weight of polyacrylamide (PAM) added. The fluid loss control of PHP is shown to be due to increase of mud viscosity and improvement of mud cake quality through protection of fine colloidal particles.更多还原