大位移定向井钻井液技术 1.井眼净化 大位移定向井斜井段岩屑容易下沉,在井壁形成岩屑床,使用正电胶钻井液可以提高钻井液的携砂能力。室内试验及现场应用表明,钻井液中正电胶干剂含量在0.2％—0.3％时,钻井液的动切力为3—9 Pa,塑性粘度为10—18 mPa·s,能有效地解决大位移定向井携砂及岩屑床的问题。 Large displacement directional well drilling fluid technology 1. Wellbore purification large displacement directional well inclined section of rock easily sink, the formation of biting bed in the borehole, the use of positive gel drilling fluid can increase the carrying capacity of drilling fluid. Laboratory tests and field tests show that the dynamic drilling fluid viscosity is 10-18 mPa · s when the content of positive electrode sizing agent in drilling fluid is 0.2% -0.3%, which can effectively solve the problem of large Displacement Directional Well Carrying Sand and Cuttings Bed Problems.