Page 58 - Wire Rope News & Sling Technology - February 2020
P. 58

Inventor’s Corner

                                                                  By William Fischer
                                                        Thank  you for  your  interest  in our  first
                                                         publication of the new year. I hope all of
                                                           our readers had a great  holiday season,
                                                            and are looking forward to a healthy and
                                                            prosperous year. It has been an overall
                                                     rather mild winter on the east coast. Hopefully,
                                           it means  that  many  industry  projects  are  underway.
                                     Thanks again for your readership, and on to Spring.

         Elevator  system on a subsea device for transfer of
         subsea payload
         Pat. 10,386,521 U.S. class 1/1 Int. class B63B 27/32
         Inventor: Martin John Hartland, Katy, TX., Brendan James
         Reid, Maylands, AU., Benjamin Jeremy Ash, Lynwood, AU.
         Assignee: Seabed Geosolutions B.V., Leidschendam, NL.
           This  patent presents a system, apparatus, and method
         for transferring a subsea payload (such as seismic nodes) at
         a subsea position by using an elevator system located on a
         subsea basket. A plurality of seismic nodes may be located
         on a plurality of support slides, trays, or other node holders
         at different levels within  the basket. The elevator system
         is configured to move the seismic nodes between different
         heights within the basket for external transfer from one or
         more vertical positions. During transfer operations between
         a subsea basket and an underwater vehicle (e.g., ROV), the
         desired level of seismic nodes may be positioned to the de-  Figure 2: Illustrates one embodiment of a subsea deployment basket,
         sired vertical position within the basket and transferred to   from a side view
         the  ROV  by various  transfer  mechanisms,  such  as  an  ex-  realize that many more components may be located on the
         tendable stinger or chain drive. Multiple levels of seismic   back deck of the vessel for standard vessel operations. For
         nodes (or node holders) may be transferred between the bas-  example, one or more launch and recovery systems (LARS)
         ket and ROV during a single subsea docking.          may be located on the back deck of the vessel, which is used
           Figure 1 shows one embodiment of the present disclosure.   to deploy and recover the ROV. While not illustrated for sim-
         Seismic devices, such as autonomous seismic nodes, may be   plicity purposes, for some types of subsea equipment (such
         lowered from a marine surface vessel to a subsea position   as an ROV), deployment line 113 may consist of separate
         for transferring of those nodes to an unmanned underwater   sections, such as a tether section and an umbilical section.
         vehicle (UUV), such as a remotely operated vehicle (ROV).   For example, as is known in the art, if subsea equipment 111
         ROV 111 may be deployed from surface vessel 101 from the   is an ROV (such as the FUGRO FCV3000 or other similar
         surface of a water body, such as sea surface 1. The ROV may   ROV), the ROV is coupled to a tether management system
         be coupled to the surface vessel while in the water via de-  (TMS) via a first wire segment (or tether) and the TMS is
         ployment line 113, such as a tether, cable, wire, or rope, as   connected to the surface vessel via a second wire segment
         is known in the prior art. Surface vessel 101 is shown in a   (such  as an umbilical cable). In general,  for the purposes
         simplified version in figure 1, and one of skill in the art will   of this disclosure, some or all of the portions of an ROV’s
                                                              tether and/or umbilical cable (or other similar subsea device)
                                                              may be generally considered as the ROV’s deployment line.
                                                              In other embodiments, an autonomous underwater vehicle
                                                              (AUV) or other UUV may be used instead of an ROV.
                                                               In one embodiment, the ROV may have a skid or other
                                                              payload  storage system  115 for storing one or more pay-
                                                              load  devices  and/or  for  transferring  such  payload  devices
                                                              from the subsea basket 101 to the ROV 111. For example,
                                                              skid  115  may comprise  or  be  coupled  to docking  system
                                                              117 for docking and/or coupling ROV 111 to subsea basket
                                                              101, which may or may not have a corresponding collar or
                                                              docking mechanism to mate with the docking system of the
                                                              ROV. Skid 115 may be located on an underside of the ROV
                                                              (as  shown  in  figure  1)  and/or  may  be  partially  located  on
         Figure 1: One embodiment of a deployment system from a marine vessel.  a front, back, or side portion of the ROV. In some embodi-

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