发明名称 |
METHOD AND APPARATUS FOR MILLING A ZERO RADIUS LATERAL WINDOW IN CASING |
摘要 |
A flexible milling assembly for milling an orifice through a well casing. The milling assembly can include a drive yoke, and a plurality of straight and split yoke assemblies—all linked together and to a cutter head with universal blocks that enable the components to pivot relative to each other. A string of joint tubing connected to a prime mover on the surface is used to lower the milling assembly into a well and supply the driving torque. A split shoe coupled to a guide tube is positioned within the well casing where the orifice is to be milled. The milling assembly is guided through a curved passage within the split shoe to bring the cutter head into contact with the well casing. A protector assembly can be provided to enclose and protect the milling assembly when it is tripping into and out of the well casing. |
申请公布号 |
US2015337613(A1) |
申请公布日期 |
2015.11.26 |
申请号 |
US201514817071 |
申请日期 |
2015.08.03 |
申请人 |
Belew David;Kolle Jack J.;Marvin Mark H. |
发明人 |
Belew David;Kolle Jack J.;Marvin Mark H. |
分类号 |
E21B29/06;E21B17/20 |
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 |
Midland TX US |