dva well systems

Well Access Systems

Direct Vertical Access (DVA) Completion Workover Riser (CWOR) Riserless Light Well Intervention (RLWI)

Riser and Riserless Systems for the

Offshore Industry...

FMC Technologies Well Access Systems (WAS) is a combination of FMC’s Direct

Vertical Access (DVA) with our Completion Work Over Riser (CWOR) and FMC’s

latest Riserless Intervention Systems. This combination of products and services

provide a complete systems approach to system engineering, detail design, stress and

riser analysis, and equipment manufacturing. WAS ensures reliability while adding

value.

For solutions to your well access and intervention needs, contact FMC Technologies

at www.fmctechnologies.com/subsea

Direct Vertical Access

FMC Technologies’ Direct Vertical Access (DVA) products provide a combination of surface

and subsea technology to meet the demanding conditions associated with Tension Leg

Platform and Spar floating production platforms.

A DVA System consists of these types of components:

• FMC UWD-15 or UWD-10 Subsea Wellhead System at the mudline

• FMC Subsea Tie Back Connector to connect the top tensioned riser to the subsea wellhead

• FMC Stress, Keel and Tensioner Joints designed to be application specific

• FMC High- and Medium-Fatigue Resistant Riser Joints designed to be application specific

• FMC Riser Tensioner System

• FMC Surface Wellhead and Tree System

UWD-15 Subsea Wellhead SystemsFMC’s UWD-15 subsea wellhead systems have set the standard for excellence since their introduction in 1991. Today’s UWD-15 family advances this long tradition in a complete range of high pressure and deepwater applications.

Standard Rigid Lock Large Bore

UWD-10 Subsea Wellhead SystemsFMC’s UWD-10 Slimbore System offer smaller bore diameters for slender well designs. The UWD-10 system is based on the same world-proven technology as the UWD-15 systems. The Slimbore wellhead allows the use of reduced diameter riser systems for drilling and production applications. This makes it possible for early genera-tion drilling vessels to drill in deeper water and floating production facilities can increase the quantity of produc-tion risers tied back to the host platform.

13-5/8” Slimbore 14-3/4” Slimbore 16-3/4” Slimbore

Tieback Connectors

FMC has a wide variety of hydraulic and mechanical tieback connectors for various Well

Access System (WAS) applications. The hydraulic connectors are designed to lock to an

internal or external profile on the subsea wellhead housing. The hydraulic tieback connec-tors feature hydraulic locking and unlocking by ROV, interface with the industry standard

H4 subsea wellhead profile and are positioned on the wellhead with either guidelines or guidelineless systems.

Internal Hydraulic Tieback Connector landed and locked into a UWD-15 subsea wellhead, with a tapered stress joint assembled to the top of the connector.

Slimline Torus 4 External ConnectorFMC’s Slimline Torus 4 external connector was specifi-cally designed for WAS applications with an outside

diameter (OD) of 32.5” it is best suited where the tieback connector must pass through TLP keel guides

and Spar buoyancy cans. It features a secondary

unlock piston and has numerous seal configurations – metal-to-metal and elastomer seal into the production casing hanger, or lockdown bushing for single riser and

H4 type wellhead seal for drilling riser and dual riser applications. This connector has high bending moment

capacity of 4.7 MM ft/lbs and 10,000 psi internal pressure, combined.

FMC’s Slimline external connector utilizes field proven technology and has been qualification tested to API 17D standards.

Slimline Torus 4 External Connector locked on to a sub-sea wellhead

Internal Hydraulic TiebackFMC’s internal hydraulic tieback connectors are

designed to lock into an internal profile in the FMC UWD-15 Subsea Wellhead Housing. The reduced OD (27”) of this connector allows it to pass safely through buoyancy cans and keel guides. This connector has a

bending moment capacity of 2.0 MM ft/lbs. with a primary metal-to-metal seal and elastomer backups in the production casing hanger.

Internal Hydraulic Tieback Connector landed and locked into a UWD-15 subsea wellhead, with a tapered stress joint assembled to the top of the connector.

Specialty JointsFMC has provided custom designed specialty joints (Tapered Stress, Keel and Tensioner) for numerous riser applications. These specialty joints are engineered on a project specific basis for overall length, wall thickness and taper length. They feature custom design inter-face fatigue resistant compact flanges and threaded riser connections. They are construct-ed from steel open die forgings and designed for high fatigue applications, high fracture

toughness and large bending moments.

HPT Pull Up Tensioner HPT Push Up Tensioner

TensionersFMC offers various tensioner systems from the basic fixed lock-off riser tensioner system to the more sophisticated hydro-pneumatic systems. These tensioner systems provide the top tension on the riser system that is required to ensure the survival of the riser system from

the ocean currents, and waves and the motion of the floating platform relative to the riser.

HPT Pull Up Tensioner

ed from steel open die forgings and designed for high fatigue applications, high fracture

HPT Push Up Tensioner

Fixed Lock-Off Tensioner Systems

FMC’s Fixed Lock-Off Riser Tensioner Systems are designed for benign ocean environments. This tensioner features

upper and lower passive load rings that interface with

electronic load cells allowing for simple access and mainte-nance. The design also features two adjustment nuts

allowing for riser tension adjustment.

This type of tensioner system has been successfully utilized on TLP’s in the Asia-Pacific and West Africa regions.

Fixed Lock-O!Tensioner System

Hydro-Pneumatic Tensioner (HPT) SystemsThe HPT systems feature large hydraulic cylinders and accumulators which operate in severe offshore conditions,

even with one cylinder out of service. The HPT interfaces with the tension load ring that adjusts on the tension joint for

proper riser space-out and position. The tensioner is made up of an array of four to six cylinders with a total stroke 5 ft. to 20 ft. and can be supported by an integral structural frame or can be built directly into the TLP/Spar structure.

The two primary types of the hydro-pneumatic tensioner (HPT) design configurations are: pull-up or push-up. The most common is the pull-up tensioner which is utilized in applications where the tension loads are medium to high with

stroke lengths from 4 ft. to 28 ft. The push-up type tensioner is utilized for applications with high tensioner loads, stroke lengths greater than 20 feet, and where the cylinders can be mounted directly onto the floating facilities structure. Both configurations incorporate centralizing rollers that constrain the system from lateral and rotational loads while providing

guidance during the entire stroke. These types of tensioner

systems have been successfully utilized on TLP’s and Spars in the Gulf of Mexico, Asia-Pacific and West Africa regions.

Pneumatic Riser Tensioner

WAS Surface Wellheads

FMC Technologies is the market leader in surface wellheads and trees for WAS with

equipment designed with special considerations for minimizing wellhead and tree height and weight for floating production platform applications, while incorporating fire resis-tance rating and high fatigue loading capabilities.

3D cutaway of a Dual Bore DVA Surface Wellhead and Tree System

and weight for floating production platform applications, while incorporating fire resistance rating and high fatigue loading capabilities.

3D cutaway of a Dual Bore DVA Surface

FMC offers five patented adjustable casing hanger designs for WAS applications as well as a top mounted

riser load monitoring system (RLMS) to measure the

applied tension on the riser system from the tensioning

system.

Typically, Surface Wellhead Systems require a specially

designed wellhead access platform that gives the

operator ergonomic access to the wellhead and tree.

These wellhead access platforms provide attachment

points for the electrical junction boxes and the hydrau-lic bulkheads for umbilicals, while providing clearance

for flowlines and piping.

Completion Workover Riser Systems

FMC Technologies is the market leader in the supply of Completion / Workover Riser

Systems throughout the world. From multi-functional monobore and dual bore riser systems for heavy installation operation from drilling rigs, to the Riserless Light Well

Intervention systems for wireline and coil tubing operations performed for drilling rigs or

smaller support vessels. These systems make it possible to install, retrieve and perform

interventions on the subsea tree systems while maintaining well control from the comple-tion / intervention vessel.

Completion Workover Riser System landed on subsea tree

tion / intervention vessel.

Completion Workover Riser System landed on subsea tree

EDP

LRP

Tree

Tubing Head

The Emergency Disconnect Package (EDP) is designed for an emergency

allowing the completion/intervention vessel to disconnect from the

subsea well while under load with a high disconnection angle. The EDP

disconnects from the LRP and isolates the riser from the environment.

A production retainer valve shuts in the riser and the annulus master

valve shuts in the riser. A crossover valve allows circulation of the riser

after disconnection.

The Lower Riser Package (LRP) is designed to isolate the well from the

personnel and the riser. The Pipe Slip Ram (PSR) hangs off the work

string and provides the means for retrieval of a sheared work string once

the emergency has ended. The Lower Blind Shear Ram (LBSR) shears the work string and provides the primary seal to the environment. The

Upper Blind Shear Ram (UBSR) shears the work string and provides a secondary seal to the environment.

Emergency Disconnect Package (EDP)

Lower Riser Package (LRP)

Completion/ Intervention Systems

The Heavy Completion / Intervention System includes Lower Riser Package, Emergency Disconnect Package, riser joints, specialty riser joints, tensioner system and surface tree.

The Light Completion / Intervention System includes

Lower Lubricator Package, Lubricator Tubulars, Upper Lubricator Package and Pressure Control Head.

This system is used with smaller dynamically positioned semis and

monohull vessels that offer economic advantages over the high cost of

drilling units.

The Riserless Light Weight Intervention (RLWI) system is a 10,000 psi working pressure system that offers subsea flushing with well fluids at the surface. This system is capable of passing a wireline tool string

length of up to 66 feet long and is compatible with both horizontal and vertical subsea trees.

The Lower Lubricator Package (LLP) has a 13 5/8” connector for connect-ing to the LIP. The LLP has the same functionality as the EDP in the

Heavy Intervention system, plus it has a 44 function control module and umbilical termination. The Lubricator tubulars (LUB) have a 7 1/16” main bore with Speedloc MkII connections and integrated hydraulic lines and

grease lines in the speedloc hubs.

The Upper Lubricator Package (ULP) has a shear seal ram with wire cutting capaility and 10” connector for connecting to the pressure control head.

The Pressure Control Head (PCH) has a dual stuffing box in the lower end and subsea grease injection capabilities.

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