发明名称 |
METHOD AND APPARATUS FOR MILLING A ZERO RADIUS LATERAL WINDOW IN CASING |
摘要 |
<p>A flexible milling assembly for milling an orifice through a well casing. One embodiment includes 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.</p> |
申请公布号 |
CA2822614(A1) |
申请公布日期 |
2012.06.28 |
申请号 |
CA20112822614 |
申请日期 |
2011.12.20 |
申请人 |
BELEW, DAVID |
发明人 |
BELEW, DAVID;KOLLE, JACK J.;MARVIN, MARK H. |
分类号 |
E21B7/08;E21B10/32;E21B17/00 |
主分类号 |
E21B7/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|