Patent ID: 7699123
Filing Date: 2010-04-20
Classification: E21B

Abstract:
1. A bore hole sleeve reaming apparatus for enlarging and cleaning a bore hole having an entrance end and an exit end and pulling a string of pipe through the bore hole, said bore hole sleeve reaming apparatus comprising at least one cleaning or bursting head provided at the entrance end of the bore hole for receiving the string of pipe; a connecting member having one end connected to said bursting head and the opposite end of said connecting member extending through the bore hole to the exit end of the bore hole; at least one tapered clearing sleeve provided on the string of pipe, said clearing sleeve having a diameter larger than the pipe; and a pulling apparatus connected to said opposite end of said connecting member at the exit end of the bore hole for pulling said bursting head, the string of pipe and said clearing sleeve from the entrance end of the bore hole through the bore hole to the exit end of the bore hole responsive to operation of said pulling apparatus.