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目前,用于钻井液降滤失的处理剂有许多种,然而根据其化学成分则可将其分成两大类,即多糖类降滤失剂及合成聚合物类降滤失剂.表1列出了各种常用降滤失剂的分类及其热稳定性.基于表1内所列降滤失剂的使用范围均受到一定的限制,因而多年来许多钻井公司及泥浆公司希望研制出一种新型的降滤失剂,这种新型降滤失剂不仅应具有良好的热稳定性及抗电解质性能,而且还应具有良好的经济效益.人们还希望这种降滤失剂不会使钻井液粘度过度加大,以致影响到钻井液的流变性能.一、新型降滤失剂的性能1.化学性质被命名为“Polydrill”的新型降滤失剂属于合成聚合物类降滤失剂.它由一个侧基碳基
At present, there are many kinds of treatment agents for fluid loss control of drilling fluid, but according to their chemical composition, they can be divided into two categories, namely, polysaccharide fluid loss control agent and synthetic polymer fluid loss control agent. Lists the classification of various commonly used fluid loss and thermal stability based on the range of use of fluid loss additives listed in Table 1 are subject to certain restrictions, so many drilling companies and mud companies over the years to develop a This new type of fluid loss control agent not only should have good thermal stability and electrolyte resistance, but also should have good economic benefits.It is also hoped that this fluid loss control agent will not make drilling Fluid viscosity is too high, so as to affect the rheological properties of the drilling fluid.First, the performance of a new type of fluid loss 1. Chemical properties of a new type of fluid filter named “Polydrill ” belongs to the class of synthetic polymer filtration It consists of a pendant carbon group