发明名称 |
Cement Shoe and Method of Cementing Well with Open Hole Below the Shoe |
摘要 |
A casing shoe secured to a lower end of a casing string is positioned a selected distance from a bottom of the well, defining an open hole portion in the well below the casing shoe. Cement is pumped through the casing shoe and back up an annulus surrounding the casing string, while leaving at least part of the open hole portion free of cement. The annulus and the open hole portion are isolated from an interior of the casing string while the cement is uncured. The casing shoe has a timer that opens the interior of the casing string to the open hole portion after a selected time sufficient for the cement to cure. The operator may then pump a tool down the casing string while displacing fluid in the casing string below the tool through the casing shoe and into the open hole portion of the well. |
申请公布号 |
US2013075094(A1) |
申请公布日期 |
2013.03.28 |
申请号 |
US201213627433 |
申请日期 |
2012.09.26 |
申请人 |
RANKIN E. EDWARD;RITE INCREASER, LLC |
发明人 |
RANKIN E. EDWARD |
分类号 |
E21B33/16;E21B33/14;E21B43/12 |
主分类号 |
E21B33/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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