Global Geology 2009, 12(1) 32-35 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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low temperature performance
antifreeze agent
mechanism of anti-caving
synergistic action

Experimental study on low temperature performance of polymer drilling mud agents

ZHAN Jiajia1 , XU Huiwen1 and CAI Hongliang2

1. College of Construction Engineering, Jilin University, Changchun 130026, China; 2. China Water Northeastern Investigation Design and Research Co. L td, Changchun 130061, China


Drilling fluid additives has a major impact on rheology behavior and other performances of the drilling fluid. The key to low temperature drilling fluids is choosing antifreeze and polymer agent which have a strong ability in resisting low temperature. On the basis of determining glycol as antifreeze agent, the low-temperature-performance and capacities of anti-collapse of regular validitymud agents have been studied, the mechanism of anti-caving of the partially hydrolyzed polyacrylamide ( PHPA) , polyp ropylene potassium (KPA) and PAC-141 polymer additives have been also analyzed. A pilot study of compatibility between ethylene glycol and the poly- mers has educed that the polymers, ethylene glycol and inorganic salt are compatible, and they can significantly reduce the freezing point of drilling fluid. Anti-collapse ability of the drilling mud is the results of synergistic action among the agents.

Keywords polymer   low temperature performance   antifreeze agent   mechanism of anti-caving   synergistic action  
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