发明授权
- 专利标题： Elastic hollow particles for annular pressure buildup mitigation
- 专利标题（中）： 弹性中空颗粒用于减轻环形压力
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申请号： US12580093申请日： 2009-10-15
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公开(公告)号： US08080498B2公开(公告)日： 2011-12-20
- 发明人: James E. Shepherd , Joseph F. Rakow , Phillip David Pattillo, II
- 申请人： James E. Shepherd , Joseph F. Rakow , Phillip David Pattillo, II
- 申请人地址： US TX Houston
- 专利权人： BP Corporation North America Inc.
- 当前专利权人： BP Corporation North America Inc.
- 当前专利权人地址： US TX Houston
- 代理商 Barbara A. Fisher
- 主分类号： C09K8/60
- IPC分类号： C09K8/60 ; E21B47/06
摘要：
The concept involves placing within the annulus, hollow particles that possess material and geometric properties such that the hollow particles buckle at or near a defined pressure. Buckling of the particles increases the available volume within the annulus, thereby decreasing the annular pressure. The elastic hollow particles are designed such that they buckle in a sufficiently elastic manner to allow them to rebound towards their original shape as the pressure decreases. The rebounded particles then remain available to mitigate subsequent instances of APB.
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