E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/06 (2006.01) E21B 7/04 (2006.01) E21B 10/00 (2006.01)
Patent
CA 2426336
There is provided a method and apparatus for milling an opening in a tubular in a wellbore, the method comprising: installing a mill guide in the tubular at a desired milling location, the mill guide comprising a hollow straight cylindrical body having an axial bore therethrough, an upper end with an upper end opening and a lower end with a lower end opening, the lower end having a first inside surface and a second inside surface extending along straight lines parallel to one another and to the axis of the bore and diametrically opposite one another, the first inside surface being shorter than the second inside surface, inserting a mill through the tubular and the bore of the mill guide so that the mill is in contact with the second inside surface and is directed by the contact against the tubular at the desired milling location adjacent the lower end opening, and milling an opening in the tubular.
Blizzard William A. Jr.
Halford Hubert E.
Langford Dale E.
Mcfadden Fincham
Weatherford/lamb Inc.
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