TESTS AND RESEARCHES OF THE FOAM RHEOLOGICAI MODELS

Foam rheologival model is the theoretical basis of foam drilling,hydraulic parameter calculation and practical processing. The authors determined exactly the volume of flow and the difference of pressures as well as their varrieties while the foam liquid flowed through the circulating water channnels. The researches on foam liquid show that the foam rheological properties can be demonstrated by the power pseudoplastic models or Binhan plastic models,especially by the former.