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 varying 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 quai or in another location. They are picked from Quai 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 to these actions as repetative and thus as efficient as possible to reduce the

capital outlay.

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

Topsides