基本信息:
- 专利标题： COMPOSITIONS AND METHODS FOR CONTROLLING FLUID LOSS
- 专利标题（中）：组合物和方法滤失
- 申请号：EP08770640.4 申请日：2008-06-11
- 公开(公告)号：EP2164921A1 公开(公告)日：2010-03-24
- 发明人： CREWS, James, B. , HUANG, Tianping
- 申请人： Baker Hughes Incorporated
- 申请人地址： P. O. Box 4740 Houston, TX 77210 US
- 专利权人： Baker Hughes Incorporated
- 当前专利权人： Baker Hughes Incorporated
- 当前专利权人地址： P. O. Box 4740 Houston, TX 77210 US
- 代理机构： Beacham, Annabel Rose
- 优先权： US754656 20070529
- 国际公布： WO2008151329 20081211
- 主分类号： C09K8/504
- IPC分类号： C09K8/504 ; C09K8/506 ; C09K8/66 ; C09K8/68
摘要：
Alkaline earth metal compounds may be fluid loss control (FLC) agents for viscoelastic surfactant (VES) fluids used for fluid loss control pills, lost circulation material pills and kill pills in hydrocarbon recovery operations. The FLC agents may include, but not be limited to oxides and hydroxides of alkaline earth metal, and in one case magnesium oxide where the particle size of the magnesium oxide is between 1 nanometer to 0.4 millimeter. The FLC agent may alternatively be transition metal oxides and/or transition metal hydroxides. The FLC agent appears to associate with the VES micelles and together form a novel pseudo-filter cake quasi-crosslinked viscous fluid layer that limits further VES fluid flow into the porous media. The FLC agent solid particles may be added along with VES fluids. The pills may also contain internal breakers to reduce the viscosity thereof so that the components of the pill may be recovered.