Patent ID: 6578636
Filing Date: 2003-06-17
Classification: E21B

Abstract:
Apparatus for horizontally drilling in wells comprising a shoe assembly adapted to be lowered into a casing of a well to a depth at which a hole or holes are to be drilled in the casing wall, said shoe assembly comprising a fixed section and a rotatable section, a cutter support body on the rotatable section adapted to support a cutter adjacent an angular location at which it is desired to form a hole in the casing, a gyroscope on the assembly fixed relative to the cutter support body and adapted to transmit a signal to the surface that indicates the angular location of the cutter support body, said fixed section being arranged to receive said cutter in a longitudinally oriented path, said cutter support body being arranged to receive said cutter from said longitudinally oriented path and to direct said cutter in a radial path towards the casing wall.