SEAMOOR 2000 

              

 

Manufacturer: Noble Denton

Website: http://www.nobledenton.com/software-seamoor.htm

 

Data Input:

 

The software has been designed to operate in an intuitive and interactive way, making full use of the Windows Graphical User Interface (GUI). Run-time operations are completely menu driven using mouse and/or keyboard input, and information is presented on full colour graphic displays. Flexible input data files are used to define the geometry and response characteristics of the vessel, details of the mooring system and the geometry of any field objects with clearance monitoring points. All data files may be created and modified by the user. Simple moorings need a minimum of data.

The Mooring system may be easily modified with SEAMOOR 2000. The vessel may be moved to any desired position within the pattern, or the entire system may be relocated and re-orientated in a single operation. Anchors may be repositioned and line pay-outs adjusted so as to achieve any required mooring arrangement. A unique feature enables calibration of the system to match known line tensions and pay-outs at known vessel positions

Applications:

 

SEAMOOR 2000 is a moorings analysis and advisory program which has been specifically developed to meet the needs of those involved in the operational management of spread moorings,. Such as;

  • offshore drilling rigs
  • construction barges
  • accommodation vessels

 

The program may be used on-board and in the office, where it will enable all aspects of mooring and station keeping performance to be assessed rapidly and accurately. SEAMOOR 2000 includes low frequency motion prediction and line dynamic response calculations in order to address deepwater mooring challenges.

The program can also be used for:

  • Response engineering
  • Operational planning
  • Bid preparation

 

SEAMOOR 2000 provides an easy to use capability for decision support on-board offshore vessels, where it can undertake a wide range of tasks:

  • Predict vessel excursions and line tensions under existing or forecast environmental conditions.
  • Advise the line payout adjustments needed to achieve a desired vessel position and heading.
  • Estimate actual vessel position from known line tensions.
  • Monitor gangway movements plus vessel and line clearances from other structures.
  • Compute line catenary profiles and pipeline clearances.
  • Determine the consequence of any single line failure.

 

Computer systems:

SEAMOOR 2000 runs as a 32-bit Microsoft Windows application on IBM-PC or compatible computers.

Postprocessor output:

 

SEAMOOR 2000 presents key information graphically on a plan view which shows the vessel outline at its mean position, together with the anchors and all deployed mooring lines. Line condition is indicated by colour (red for high tension) and line style (dashed if failed). Field features such as pipelines, wellhead templates and platforms can also be displayed. Zooming in/out and panning across the plan view is easily accomplished. Range rings or co-ordinate grids may be overlaid on the view, and clearance distances between particular points on the vessel and other objects can be shown as required.

A text panel displays a summary of numerical results for environment load, vessel excursion and line tensions. Pop-up dialogue boxes display other information and accept input data. Catenary details can be called in a separate window where line profile and pipeline clearances are shown for the maximum and minimum tensions under the prevailing environment.

 

Solution:
  • Environmental forces computed from input weather conditions.
  • Prediction of vessel position and maximum expected motions (mean, wave frequency, low frequency components).
  • Plan drawing of vessel, moorings and field features.
  • Details of all mooring lines including payouts and tensions.
  • Consequence of line failure by time-domain simulation.
  • Winch adjustment for optimisation or position moves.
  • Multi-component mooring lines.
  • Surface or submerged buoys and sinkers on any lines.
  • Monitoring of gangway stroke and vessel/line clearances.
  • Catenary profiles and clearances over seabed pipelines.
  • Low frequency vessel dynamics.
  • Line dynamic tension analysis.

 

Modelling:
  • Field layout with wellheads, monitoring points other vessels.
Loading:
  • Environmental loading
  • Mooring line tensions