摘要
针对钻探工作中钻头冷却不及时,严重影响钻头的使用寿命甚至发生烧钻等井下复杂事故这一技术难题,本文采用向钻井液中加入纳米材料的方法,提高钻井液热容性能,达到增强钻井液冷却钻头效果的目的。因此,通过实验研究,分析了不同纳米材料对水基钻井液热容性能的影响,并计算加入纳米材料后钻井液的比热容。研究结果表明:钻井液比热容随着纳米材料加量的增加而增大,其中,TiO_(2)提升钻井液比热容的能力最强,加量0.5%时,比热容提升率达35.33%。此外,钻井液的黏度和动切力也随纳米材料加量的增加而增大,但静切力几乎不受其影响。本研究为钻探特别是金刚石取心钻探中避免钻头寿命缩短甚至烧钻事故的发生具有积极的意义。
Because the drill bit is not cooled in time, the service life of the drill bit is short, even the drill bit is burned. This study tries to improve heat capacity of drilling fluid by means of adding nano-material to drilling fluid in order to cool the drill bit in time. The results indicate that the specific heat capacity of drilling fluid increases with the increase of nano-material content. And the ability of nano-TiO;to enhance the specific heat capacity of drilling fluid is the best. The specific heat capacity of the drilling fluid with 0.5% nano-TiO_(2) increases by 35.33%. In addition, the viscosity and dynamic shear force of drilling fluid also increase with the increase of nano-TiO_(2), but the static shear force is hardly affected.
作者
刘徐三
LIU Xu-san(Xi’an Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Xi’an710077)
出处
《四川地质学报》
2022年第2期331-334,共4页
Acta Geologica Sichuan
基金
国家重点研发计划课题(2018YF0808005)。
关键词
钻头冷却
纳米材料
钻井液
热容性能
比热容
drill bit cooling
nano-material
drilling fluid
specific heat capacity
