B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
61/5.9
B23K 1/20 (2006.01) B23C 3/00 (2006.01) B23D 21/04 (2006.01) B63C 11/40 (2006.01) F16L 1/26 (2006.01)
Patent
CA 1062027
SUBSEA MACHINE TOOL ABSTRACT OF THE DISCLOSURE A subsea machine tool for preparing the end of a bare piece of pipe in a subsea location for receiving an overfitting coupling. The embodiment of the invention described in the application includes a support assembly adapted for raising and lowering in a body of water. A pipe clamp is attached to each end of the support assembly for clamping the pipe at two axially spaced apart positions. A split frame is supported by the support assembly for axial travel thereon, which frame is adapted for opening and closing about the section of the pipe intermediate the clamps. A split ring gear assembly is supported by the frame for rotation therein and about the pipe section, The split ring gear is in the form of a spool assem- bly wherein an involute gear forms one flange of the spool and a face plate forms the other flange. The spool is supported about the exterior thereof by a split fixed ring which in turn is supported by the frame. The fixed ring has mounted thereon one or more hydraulic motors which are arranged for rotating the ring gear relative to the fixed ring. The face plate has mounted thereon for rotation therewith work means in the form of a milling machine which is radially movable and which serves the purpose of milling off any protrusions on the external sur- face of the pipe, as for example, a longitudinal weld seam. Another tool is mounted on the face plate for sensing out-of- roundness of the pipe and the concentricity of the pipe rela- tive to the ring gear, and for providing a read-out of any variations in roundness or concentricity, which read-out may then be used to operate the milling machine to remove the dis- continuity. In addition, the face plate has mounted thereon a rotary cutting tool for making a circumferential cut about the pipe, to thereby sever the same. The tool is adapted for remote operation such that deep water operations can be accom- plished.
276049
Motes-Conners Corroll J.
Satterwhite Lawrence E.
Hydrotech International
Na
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