...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Energy Resources Technology >Thermochemical Upgrading of Calcium Bentonite for Drilling Fluid Applications
【24h】

Thermochemical Upgrading of Calcium Bentonite for Drilling Fluid Applications

机译：钻井液应用中膨润土钙的热化学改性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The rheological properties of bentonite suspensions depend on the chemical composition and the contained dominant element, such as calcium (Ca), potassium (K), and sodium (Na). Na-bentonite type is the one used in drilling fluids, because it has good dispersion stability, high swelling capacity, and outstanding rheological properties. Ca-bentonite generally has bad rheological performance; however, it can be activated by sodium to be used in drilling fluids, since there are huge unutilized Ca-bentonite resources. Many previous attempts of activation of Ca-bentonite were not feasible, upgrading required addition of many extra additives or sometimes mixed with commercial Na-bentonite to improve its properties. In this paper, a process of integrated beneficiation method is designed to efficiently remove the nonclay impurities and produce pure Ca-bentonite. An upgraded Ca-bentonite was produced using a combined thermochemical treatment in a wet process by adding 4 wt % of soda ash (Na2CO3) while heating and stirring. The new thermal treatment optimized and described in this study greatly improved the sodium activation and ions exchange process and improved bentonite properties. The thermochemically upgraded Ca-bentonite outperformed the rheological properties of the commercial bentonite. And when tested in a typical drilling fluid formulation at high temperature, the investigations showed an identical behavior of the commercial drilling grade bentonite. Moreover, the results obtained showed that the thermochemically upgraded Ca-bentonite has higher yield point/plastic viscosity (YP/PV) ratio than commercial Na-bentonite when mixed with the drilling fluid additives. Higher YP/PV ratio is expected to enhance the hole cleaning and prevent most of the drilling problems.
机译：膨润土悬浮液的流变特性取决于化学组成和所含的主要元素，例如钙（Ca），钾（K）和钠（Na）。钠膨润土类型是用于钻井液的一种，因为它具有良好的分散稳定性，高溶胀能力和出色的流变性能。钙基膨润土通常具有不良的流变性。但是，由于有大量未利用的钙膨润土资源，它可以被钠激活以用于钻井液。以前许多活化钙-膨润土的尝试都是不可行的，升级需要添加许多额外的添加剂，或者有时与市售的钠膨润土混合以改善其性能。本文设计了一种综合选矿方法，以有效去除非粘土杂质并生产纯钙膨润土。通过在加热和搅拌的同时添加4 wt％的纯碱（Na2CO3），在湿法中使用联合热化学处理来生产高品质的钙膨润土。本研究中优化和描述的新型热处理极大地改善了钠活化和离子交换过程，并改善了膨润土性能。经热化学改性的钙膨润土的性能优于市售膨润土。并且，当在高温下对典型的钻井液配方进行测试时，研究表明，商用钻井级膨润土具有相同的性能。而且，获得的结果表明，当与钻井液添加剂混合时，热化学改性的钙膨润土比市售钠膨润土具有更高的屈服点/塑性粘度（YP / PV）比。更高的YP / PV比有望增强孔的清洁度并防止大多数钻孔问题。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号