Patent ID: 6920945
Filing Date: 2005-07-26
Classification: E21B

Abstract:
1. A method for facilitating horizontal drilling through a well casing, the method comprising the steps of: positioning in the well casing a shoe defining a passageway extending from an upper opening in the shoe through the shoe to a side opening in the shoe; inserting a rod and casing mill assembly into the well casing and through the passageway in the shoe until a casing mill end of the casing mill assembly substantially abuts the well casing, said casing mill assembly comprising at least one barrel-shaped yoke interconnecting at least two block and pin assemblies coupled together to substantially form at least two universal joints coupling together the rod and the casing mill end of the casing mill assembly for facilitating the step of inserting; and rotating the rod and casing mill assembly until the casing mill end substantially forms a perforation in the well casing.