Ufloat – Modularised Subsea Buoyancy System

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The Ufloat System is a versatile modularised deep-water, 2 500m, subsea buoyancy system available for hire.

The system includes a number of buoys sizes that individually, or when combined to assemblies, or when interconnected provides adjustable buoyancy ranging from 10 kg to 1 000 kg or more. The buoys design and features allow it to be configured to suit a large number of applications, geometries, buoyancy distribution, and attachment arrangement.

The Ufloat System modularised design maximise the availability of various size buoyancy, as the units can be quickly disassembled and re-assembled into a different size buoyancy unit.

The buoys dry weight to buoyancy ratio is 1 : 1.25 (i.e. a 200 kg buoy gives 250 kg buoyancy).

See the Ufloat Sysem Datasheet for further details.

Subsea Mattress System

Ufloat – Standard Single Unit (Rental)

The Ufloat System includes nine standard single units, either Type A or B.

Type A: Five different sizes, 0.54 m wide and 0.3 m high. Lengths varies from 0.45 m to 1.7 m. Buoyancy varies from 9.2 kg to 46 kg.

Type B: Four different sizes, 0.85 m wide and 0.3 m high. Lengths varies from 0.8m to 1.7m. Buoyancy varies from 36.8 kg to 92 kg.

The smallest buoys includes 4 off webbing loops for attachment to other units, or subsea equipment. The larger ones includes 6 off webbing loops. Using the loops any one of the single unit buoys / buoy types can be interconnected in any direction in order to form assemblies with various geometry and buoyancy including elongated buoyancy strings or buoyancy blankets.

Dimension, Buoyancy and Weights: See Ufloat System Datasheet.

Subsea Mattress System

Ufloat – Standard Combined Units (Rental)

The Ufloat System includes nine standard combined units, either Type C, D or E.

Type C: Three different sizes, 0.85 m wide and 0.55 m high. Lengths varies from 1.1 m to 1.7 m. Buoyancy varies from 82.8 kg to 138 kg.

Type D: Three different sizes, 0.85 m wide and 0.60 m high. Lengths varies from 1.1 m to 1.7 m. Buoyancy varies from 110.4 kg to 184 kg.

Type E: Three different sizes, 0.85 m wide and 0.85 m high. Lengths varies from 1.1 m to 1.7 m. Buoyancy varies from 138 kg to 230 kg.

The combined units utilises the webbing loops integrated in the single units buoys when they are combined. Also using these loops any one of the combined units buoys / buoy types can be interconnected in any direction in order to form assemblies with various geometry and buoyancy.

Dimension, Buoyancy and Weights: See Ufloat System Datasheet.

Subsea Mattress System

Ufloat Type M – 250kg Buoyancy Units (Rental)

The Ufloat System includes a 250 Kg buoyancy unit, Ufloat Type M. This unit is different from the other types unit. It includes a centre lifting rope with thimbles each end. The certified lifting capacity is 4 Mt.

The buoys includes 4 off Dynema rope loops for attachment to other units, or to subsea equipment. These buoys can also be interconnected to each other sideways (secured with cargo straps through loops) or longitudinally (with 8.5t shackles).

Dimensions: Dia. 0.75m, Length 1.8m.

Dry Weight / Buoyancy: 200 kg/ 250 kg.

Depth Rating: 2 500m.

Subsea Mattress System

Ufloat System – Rigging & Lashing Equipment (Included in Rental / Purchase)

Rigging and lashing equipment can be provided loose or attached to pre-arrange buoy assembles.

Lifting and/or Attachment to subsea equipment (arrangement to be advised):

  • Soft Sling + Master Link (and/or),
  • Ufist handle type D – certified for lifting (and/or),
  • Shackles / ROV shackles.

Interconnection to of buoys (arrangement to be advised):

  • Ustrap two bar attachment plate assembly (and/or),
  • Webbing strap + Ustrap Four bar threading plate assembly (and/or),
  • Cargo strap with stainless steel ratchet (or galvanised ratchet).
Subsea Mattress System

Ufloat System – Ubag Deployment and Recovery Arrangement (Rental)

A Subsea buoyancy deployment and / or recovery arrangement is available for the Ufloat buoys (and other buoys). The arrangement is based on using Ubags with sufficient weight to deploy and / or recover subsea buoyancy.

The Ubags for buoyancy deployment and / or retrieval are available in various sizes and weights (Ubag Type A3). These Ubags includes attachment points for shackles, slings and ROV hooks.

I.e. the deployment arrangement includes:

  • Ubag for buoyancy deployment and retrieval.
  • Shackles for attachment to deployment wire and to slings for deployment / recovery of buoyancy.
  • ROV hooks for attachment of slings to the buoys.

As the Ubag is filled with sand it is ‘soft’, in case of contact the risk for damaging other equipment is reduced compared with a steel DMA.

See Ubag System See for further information.

Subsea Mattress System

Ufloat System – Local Submerged Guide Wire Arrangement (Rental)

Using the Ufloat Type M buoys in combination with guide wire anchor and guidewire, a local subsea guide wire arrangement is available for hire. Two options are available. Either they are deployed attached to the subsea equipment, e.g. attached to spreader bar in case of a tie-in spool installation, or they are deployed separately. If deployed with a spreader bar or a running tool, the system includes a guide funnel stopper / buoy catcher. If deployed and retrieved separately, the Ubag Deployment and Recovery Arrangement can be used. Alternatively, a steel DMA can be used.

Similar systems was developed by Udeco for the Girassol tie-in spool installation (FMC) and for the Scarab / Saffron flying lead deployment system (Stolt Offshore).