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CN104830293A 一种含粘土微泡沫修井液及其制备方法和用途 无效 - 撤回

  • 专利标题： 一种含粘土微泡沫修井液及其制备方法和用途
  • 专利标题（英）： Clay containing microfoam workover fluid, preparation method and application thereof
  • 申请号： CN201510198312.2
    申请日： 2015-04-24
  • 公开(公告)号： CN104830293A
    公开(公告)日： 2015-08-12
  • 发明人: 马喜平 , 周有祯 , 马启睿 , 王晓磊
  • 申请人： 西南石油大学
  • 申请人地址： 四川省成都市新都区新都大道8号
  • 专利权人： 西南石油大学
  • 当前专利权人： 西南石油大学
  • 当前专利权人地址： 四川省成都市新都区新都大道8号
  • 主分类号： C09K8/38
  • IPC分类号： C09K8/38 ;  C09K8/42
一种含粘土微泡沫修井液及其制备方法和用途
摘要：
一种含粘土微泡沫修井液，包括以下组分：303.2～317.4质量份纯水，3～12.4质量份膨润土，0.3～1.3质量份碳酸钠，0.6～2质量份黄原胶，0～2质量份羧甲基纤维素钠(中粘)，0～1.2质量份羟乙基纤维素，0～2.53质量份硫脲，0～0.32质量份十二烷基二甲基苄基氯化铵，1.82～5.58质量份十二烷基二甲基甜菜碱，1.82～5.58质量份椰油酰胺基丙基羟磺酸甜菜碱；其制法为：先将膨润土加入水中，制成基浆，再将硫脲加入，再将黄原胶、羧甲基纤维素钠(中粘)、羟乙基纤维素依次加入制备成混合液，再将十二烷基二甲基苄基氯化铵加入至混合液中，最后将椰油酰胺基丙基羟磺酸甜菜碱和十二烷基二甲基甜菜碱加入，高速搅拌，即得含粘土泡沫修井液。其优点是：该修井液的液膜强度高、气体通透性差，与常规泡沫修井液相比，具有滤失量低、泡沫强度高、稳定性好、携砂能力强、成本低、施工方便等优点。
摘要（英）：

The invention relates to a clay containing microfoam workover fluid, which comprises the following components: 303.2-317.4 parts by mass of pure water, 3-12.4 parts by mass of bentonite, 0.3-1.3 parts by mass of sodium carbonate, 0.6-2 parts by mass of xanthan gum, 0-2 parts by mass of sodium carboxymethylcellulose (medium viscosity), 0-1.2 parts by mass of hydroxyethyl cellulose, 0-2.53 parts by mass of thiourea, 0-0.32 part by mass of dodecyl dimethyl benzyl ammonium chloride, 1.82-5.58 parts by mass of dodecyl dimethyl betaine, and 1.82-5.58 parts by mass of cocamidopropyl hydroxy sulfobetaine. The making method includes: firstly adding bentonite into water to make a base slurry, adding thiourea, then adding xanthan gum, sodium carboxymethylcellulose (medium viscosity) and hydroxyethyl cellulose in order to prepare a mixed solution, then adding dodecyl dimethyl benzyl ammonium chloride into the mixed solution, finally adding cocamidopropyl hydroxy sulfobetaine and dodecyl dimethyl betaine, and performing high speed stirring, thus obtaining the clay containing microfoam workover fluid. The workover fluid provided by the invention has high liquid membrane strength and poor gas permeability, and compared with conventional foam workover fluids, has the advantages of low filtration loss, high foam strength, good stability, strong sand carrying capacity, low cost, and convenient construction, etc.

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