| 摘要 |
<p>Improved drilling of a well with aqueous drilling fluids is obtained by incorporating within the water phase a polymer obtained as a product of radiation-induced polymerization of acrylamide, methacrylamide, acrylic acid, methacrylic acid, alkali metal salts thereof, or mixtures thereof. Polymerization is preferably carried out in 10-60% aqueous monomer solution with gamma radiation. The aqueous monomer solution, before radiation, preferably contains 25-99% acrylamide and 75-1% sodium acrylate. Drilling fluids containing about 0.01 to about 10% by weight of polymer in the water phase exhibit improved fluid loss control properties. These polymers also impart reduced friction loss properties to the drilling fluid.</p> |
