west navion lift in  1 (FILEminimizer)
Modular Modules 1994, Limited by Shear Legs & Craneage Restrained Capability at the Time
Modular Modules 1994, Limited by Shear Legs & Craneage Restrained Capability at the Time
Modular Modules, Current Date Approach 2016
Modular Modules, Current Date Approach 2016
West Navion Is a Twin Ram Rig Drillship, in this photo sitting in the yard awaiting the lift in of the twin derrick
The Diagrams to the left illustrate 2 studies
concerning the lift in to a floater of Modules.
There has long been the aspiration to establish a
concept of standard modules for use on a
standard floater. Such a degree of
standardisation is hard to acheive when the
overall installation requires designing to what are
very variable demands. Well requirements are
rarely the same some have small flows, small
reserves, may be concentrated or spread out,
have varying ratios of gas to crude, varying crude
density, contain H2SO4, need water injection,
gas injection etc. The topsides to meet these
designs are thus of a similarly nature. The two
examples illustrate the current standard approach
versus a previous historical approach. The
difference in the two concens how on site crane
capaity to lift has increased. So too has the lift
capability of floating shear leg cranes.
West Navion is a Dynamically Positioned Drill Ship, more
detail of the FDS is given in 4d -3. This section concerns
modules of a general type that are lifted in, usually inshore
and onto a Floater. They have minimal floor structure since
they are moved around on yard on wheels and sit on deck
beams or a series of post supports. The roofs are also
minimal for usually another tier of modules is not sitting on
top. Roof structure is also usually geared for a 2 point pick
and thus again is minimal. The Module lift in on West Navion
is Power Generation with Wartsila Drivers. The module is
lifted from transport by shear legs and moved in over the
vessel. See stop motion below which explains the process.
The stop motion illustration below shows modules being floated over on to an FPSO. These and large
packages are floated over and landed using guide post and location pins. The Module is built on qauy
or in another location. They are picked from Quay or Barge and moved out on Shear Leg Cranes barge
mounted. The hull is brought in and the modules floated back over the hull, they are then lowered into
position. The object of all of this activity is that these actions are repetative and thus as efficient as
possible to reduce capital outlay.
a general understanding of Modules 
Modules, General, Offshore
C2V Where you see this, Click too View
In 4a General we looked at
the shapes a module may
have to conform with.In
4a_2, Magnus is taken as
the example of a series of
Modules to make up a
Level 2
Level 1
Level 3
Ram Rig_BOP_Support Crane
Ram Rig_BOP_Support Crane
The Diagram below shows West
Navion Midships . The Ram Rig
Drilling structure installed is
completetly different to the
sequence right of the Modules
(boxes) being load int. The ships
midship must support the Ram Rig
weight and the drill string loads.
Adjacent to the rig are 2 tubular
magazines each with an 800 te
footprint. There thus needs to be a
different design approach to that
used for a Process FPSO.
Modularisation Concepts a comparison in time of approaches to the design of Modules