Page 65 - Wire Rope News & Sling Technology - April 2019
P. 65

INVENTOR’S CORNER




                                                                                              GK8
                                                                                                   Grade 80
                                                                                                  by THIELE
                                                                 GRADE 80 & GRADE 100
                                                                 OBLONG MASTER LINKS & ASSEMBLIES


                                                                 NEW RATINGS & NEW SIZES
 4HE /NE  4HE /NLY  4HE "EST                                     •   HIGHER WLL
                                                                 •   Grade 80 Master Links now available up to diameter 4 ¼”
                                                                 •  Grade 100 Master Links now available up to diameter 2 ¾”





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                                                                 Tulsa OK 74147  fax           (918) 665-4118  sales@kwschain.com

 Sea  Link  Wooden  Shell                                     paint or a rope clamping device on the main carrier rope,
         etc, and can be provided in real time if desired. As used here-
                                                              and the actual attachment of the node 110 is performed by
         in, the term “environmental” is not limited to “pollution” or
 Construction  &  Fishing  Blocks                             a human operator. In an automatic system, the attachment
         the like, unless such data affect the node spacing illustrated
         by L 1-L 5 on figures 17 and 18. The navigation system 240
                                                              is preferably performed by a fully automatic attachment de-
         provides information on position and velocity that affects   vice running along the main carrier rope. Similarly, a fully
         the node spacing. Velocity should be construed as a vector   automatic detachment device running along the main car-
 S Siinnggllees  •  Ds  •  Doouubblleess • •   T Trriipplleess • •   R Reegguullaar  ar  annd  Hd  Heeaavvy  Wy  Wooooddeen  Bn  Blloocckkss  rier rope would preferably be used to detach the nodes 110,
         comprising speed (magnitude) and direction. The vessel may
         be a surface vessel or an ROV. Thus, feedback from an ROV   110a etc during retrieval. Regardless of whether the attach-
         deploying nodes near the platform  11  in  figure  17  can  be   ment and/or detachment is manual or fully automatic, the
         represented by the navigation system 240.            main carrier rope, the nodes and their means of attachment
           It is emphasized that the data source shown as separate   are stored in a storage area (not shown) before and after de-
         entities 220, 230 and 240 in figure 19 represent any number   ployments. The storage area may comprise one or more reels
         of sources or systems as illustrated by the dotted line be-  for storing the main carrier rope and a system for storing the
         tween boxes 210 and 230 in figure 19. Furthermore, no fixed   nodes and other equipment.
         boundary between the sources 220, 230 and 240 should be   Position and motion of a deploying vessel (not shown) can
         inferred. For example, bathymetry information can be pro-  affect the desired node spacing, and the desired node spacing
         vided by the planning source 220 and/or the source 230 for   can require changes in position, speed or direction of the de-
         environmental data. Thus, the data source represented by   ploying vessel, which in some instances can be a surface ves-
         reference numerals 220, 230 and 240 provide any informa-  sel and in other instances an ROV. The information exchange
         tion that will affect node spacing to the control unit 200.  is represented by a double headed arrow between the control
           The control unit 200 uses the information from the data   unit 200 and the navigation system 240, which according to
         source 220, 230, 240 to calculate the required node spacing,   the above description may include a ship’s navigation and
         i.e. the desired distance between the node denoted 110 and   positioning system, a remote control system for an ROV etc.
 All  Material  Factory  Certified                            There are no fixed boundaries between the control system 200
         the next node denoted 110a on figure 19. The calculations
 Wooden  Shell  Blocks  3”  to  16”                           and the data sources 220, 230 and 240, and the schematic il-
         can be performed before deployment starts, during deploy-
         ment or both. Once the measured distance L m corresponds   lustration in figure 19 and description above does not exclude
 For  more  Associated  Wire  Rope  &  Rigging,  Inc. Waterman  Supply  Co.,  Inc.  different components, subsystems or arrangements.
         to the desired node spacing, the control unit 200 causes a
 information,  8125  Saran  Drive,  Playa  Del  Rey,  CA  90293  910  Mahar  Ave.,  Wilmington,  CA  90748  Figure 20 illustrates how a data recording node 110 is sus-
         node attachment unit 100 to attach the next node 110a to
 contact:  Ph:  1-800-901-1135  Fax:  310-448-5446 the main carrier rope 101.  pended from the main carriage rope 101 in a preferred manner.
                    Ph:  1-800-322-3131  Fax:  310-522-1043
 Email:  awrrinc@earthlink.net  The node attachment unit 100 can be manual or automat-  The main carriage rope 101 is intended to extend longitudi-
                    Email:  waterman@bigplanet.com
         ic. In a manual unit, the intended position of node 110a is   nally along the entire length of the ocean bottom seismic array,
         merely marked on the main carrier rope, e.g. by applying                              continued on next page
 Wire  Rope  News  &  Sling  Technology          August  2006  37  Wire Rope News & Sling Technology   April 2019  65
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