发明名称 |
PROTECTION OF CASING LOWSIDE WHILE MILLING CASING EXIT |
摘要 |
The lowside of a casing joint is protected from wear while milling a casing exit for a lateral borehole. The casing joint is coupled to a casing string and is made of a material that is softer than that of the casing string. A whipstock assembly is arranged within the casing joint and has a deflector surface operable to direct a drilling assembly into a sidewall of the casing joint to create the casing exit. A wear sleeve is coupled to and extends axially from the whipstock assembly, the wear sleeve defining a throat that extends axially along the axial length of the wear sleeve and transitions into the deflector surface. The axial length of the wear sleeve extends beyond a point of contact where the drilling assembly would otherwise engage the lowside of the casing joint. |
申请公布号 |
EP2817474(A4) |
申请公布日期 |
2015.11.11 |
申请号 |
EP20120868996 |
申请日期 |
2012.02.24 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
PARLIN, JOSEPH, DEWITT;DAHL, ESPEN |
分类号 |
E21B29/06;E21B7/06;E21B17/10 |
主分类号 |
E21B29/06 |
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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