Apparatus for porting a side wall of a conduit from interiorly thereof
Cutters Patent #: 4442891
ApplicationNo. 06/561596 filed on 11/29/1983
US Classes:166/297, Perforating, weakening, bending or separating pipe at an unprepared point166/55.7, Internal409/143Means for internal milling
ExaminersPrimary: Novosad, Stephen J.
Assistant: Neuder, William P.
Attorney, Agent or Firm
International ClassesB23B 41/00 (20060101)
F16L 55/26 (20060101)
E21B 23/00 (20060101)
E21B 7/04 (20060101)
Foreign Application Priority Data1982-03-29 GB
AbstractA remotely controllable travelling robot for operation inside a pipe or bore-hole has a tool mounting assembly (22) which is rotatable in support structure (14, 16) about a longitudinal axis. The support structure (14, 16) is mounted on a pair of skids (10, 12) by means of a hydraulically driven elevator mechanism including rams (32) mounted on the skids 10, 12 which lift the support structure (14, 16) to a required height so as to place the longitudinal axis approximately in coincidence with the axis of the pipe or bore-hole. A tool mounting head (80) forming part of the tool mounting assembly (22) is itself hydraulically powered for tilting about a transverse axis and for moving transversely relative to the longitudinal axis along a transverse bar (88) fixed in a tool mounting assembly casing 60.