发明申请
- 专利标题: Casing Wiping Dart With Filtering Layer
- 专利标题(中): 套管擦拭飞溅与过滤层
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申请号: US12207002申请日: 2008-09-09
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公开(公告)号: US20100059228A1公开(公告)日: 2010-03-11
- 发明人: Desmond Jones , David Szarka , Brett Fears , Earl Webb
- 申请人: Desmond Jones , David Szarka , Brett Fears , Earl Webb
- 主分类号: E21B37/04
- IPC分类号: E21B37/04
摘要:
A dart may include a foam body, a filtering material at least partially covering the foam body, and a mandrel. The foam body may surround the mandrel.
公开/授权文献
- US07673688B1 Casing wiping dart with filtering layer 公开/授权日:2010-03-09
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