FMC’s Riserless Light Well Intervention (RLWI) system is designed to perform all types of wireline jobs using braided wire or slick line. It enables operations of tool strings with variable length, and is designed with no circulation of well fluids to the intervention vessel.

The system is flexible and can perform operations on all Subsea Tree configurations for production and injection wells. The system has provision for well kill and is designed to operate efficiently and competitively versus rig based operations.

Riserless Light Well Intervention System

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RLWI - System Overview

FMC’s Riserless Light Well Intervention (RLWI) system offers safe and cost effective intervention operations on existing subsea wells resulting in increased or accelerated production volumes. The RLWI system can be deployed from smaller vessels and is easily transportable across fields.

Riserless Light Well Intervention System

System DescriptionReducing the cost of offshore intervention operations is the principal driving force behind the development of the RLWI technology. FMC’s RLWI System enables cost effective intervention operations into existing subsea wells, resulting in additional production volumes from mature subsea fields at highly competitive costs for the incremental volumes of oil. It is currently available in 7 1/16” 10k configuration and includes Upper and Lower Lubricator Packages, together with a Well Control Package (WCP) and adapters to suit most subsea tree types.

Patented Lubricator SystemFMC’s RLWI technology includes a patented Lubricator System for inserting downhole tool packages into the wellbore under full pressure without taking hydrocarbons back to the vessel or to the environment. The technology enables integrated operations, increases safety by reducing personnel exposure, as well as reducing cost.

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RLWI System Data

�� Design water depth: 3,000 m / 10,000 ft�� Operating water depth: 1,000 m / 3,300 ft (due to umbilical length)�� Design pressure: 690 bar / 10,000 psi�� Bore diameter: 7 1/16 “ / 179.4 mm�� Total weight (air): 69 ton�� Total height: 33 m / 108 ft�� Maximum toolstring length: 22 m / 72 ft�� Compatible with horizontal and conventional Trees, of all makes�� All types of wireline operations

Pressure Control Head (PCH)

Functions:

�� Dynamic grease seal around the moving wireline�� Two off static mechanical rubber element seals (Upper

Stuffing Box and Dual Stuffing Box) around the static wire (Safe Mode, activated by Wireline Operator)�� DSB has additional grease injection�� Two off MEG injection points for hydrate prevention�� Tool catcher to prevent tool drop down

Lower Lubricator Package (LLP)

Functions:

�� Connection point for WCP�� Safety Joint to prevent overload of wellhead and tree�� Carrier for controls equipment

Upper Lubricator Package (ULP)

Functions:

�� Connection point for PCH�� Wireline cutting valve acts as secondary barrier element

(This valve is normally not used in wireline operation)�� Circulation outlet

Well Control Package (WCP)

Functions:

�� Main well barrier�� Shear/Seal Ram cuts wireline, coiled tubing and wireline

tool string �� Enables flushing of hydrocarbons back into well�� Provides hydraulic pressure and supply, as well as

communication with Subsea Tree functions

Lubricator Tubular (LUB TUB)

Functions:

�� Pressure lock for wireline tool�� Carrier for grease system for PCH

Topside Equipment

�� ROV type Umbilical Reel�� ROV type Umbilical�� Umbilical Clamp�� Chemical Injection Unit (CIU)

ROV type Umbilical Reel ROV type Umbilical Umbilical Clamp

CIU

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