introductory to well head

8/14/2019 Introductory to well head

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Subsea Wellhead SystemsFor deepwater and shallow-water applications

SUBSEA SYSTEMSSUBSEA SYSTEMS


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CAMERON TECHNOLOGY LEADERSHIP LEADS TOWELLHEAD ADVANCEMENTS

Cameron has a long history of product innovation, andthe evolution of the subsea wellhead product line is a

prime example of the continuation of this heritage.

Camerons experience in pressure control can be traced

back to 1922 and the introduction of the first BOP.

Other Cameron innovations through the years include

the first subsea wellhead completion, introduction of the

legendary U BOP, the first hydraulic production control

system, the first guidelineless drilling system and the first

free-standing drilling riser.

In the late 1980s, Cameron introduced two new wellhead

system designs the STC-10and the STM-15. Since

then, nearly 1000 STC-10 and STM-15 subsea wellhead

systems have been installed successfully throughout

the world.

More advances are on the horizon. As the industry moves

forward, Cameron is here with the latest technology.

Table of Contents

STM-15 Type DW5 Deepwater High-CapacSubsea Wellhead System

STM-15 Type XL5 Deepwater Large-BoreSubsea Wellhead System

STM-15 Type XL7 High-CapacityUltra-Deepwater Subsea Wellhead System

Wellhead Connection Profiles

STC-10 Compact Subsea Wellhead System

Casing Hanger Seal Assembly RunningTools for STM Subsea Wellhead Systems

High-Capacity Running Tools for STM-15Subsea Wellhead Systems

STM Parallel Bore Metal-to-Metal (PBM) Se

Optional Trip-Saving Running Tools

Supplemental Hanger Systems for STM-1and STC-10 Subsea Wellhead Systems

STM Large Diameter Shoulder-TypeSupplemental Hangers

Innovation and Quality

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STC-10 Subsea WellheadWS2 Subsea WellheadWS1 Subsea Wellhead STM-15 Subsea Wellhead

To 1980 1980 - 1988 1989 - Present 1992 - Present

CAMERONS WELLHEAD HISTORY

The offshore Equatorial Guinea development is located in water

depths to 2400 ft (732 m). The initial development included more

than fifteen STM-15 subsea wellheads, and expansion of the field

is ongoing with six additional installations scheduled for 2011.

The South China Sea development is located in approximately

2700-ft (823 m) water depths. The initial development include

five STM-15 subsea wellhead systems with subsequent addition

of two STM-15 subsea wellheads and completion systems.

South China Sea DevelopmentEquatorial Guinea Development

Camerons wellhead systems are offered as part of our total subsea drilling and production systems. Installed in producing fie

around the world, these systems consist of wellheads, subsea Christmas trees, flowline connection systems, production manifolds

and production controls systems. Cameron systems have been installed at various water depths as well as in operating pressurup to and including 15,000 psi.

FIELD EXPERIENCE

SUBSEA SYSTEMS


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STM-15 Type DW5

Deepwater High-Capacity

Subsea Wellhead System

Camerons STM-15 Type DW5 15,000 psi WP Subsea Wellhead

System delivers up to 5.25 MM ft-lb bending capacity for

enhanced performance for drilling and completion in water

depths up to 10,000 ft (3048 m).

Active pre-load lockdown at 2 MM lb

5.25 MM ft-lb bending capacity

Standard and high-capacity 16 supplemental

hangers and adapters are available

Machined from F-22, 85 ksi yield forged material

Available for H2S service

7 MM lb end-load carrying capacity on single-

landing shoulder for deep wells with complex

casing programs

18.63 Bore17.83 Min. ID7 MM lb End-LoadCapacity LandingShoulder

High-Pressure Housing Joint Wellhead on CNC MachineSTM-15 TYPE DW5 DEEPWATER

HIGH-CAPACITY SUBSEA WELLHEAD SYSTEM

Camerons deepwater STM wellheads meet the requirements

for most subsea drilling operations with deepwater semisubmers-

ibles and drillships, as well as production applications such as

tension-leg platforms, deep-draft caisson vessels and all types

of subsea trees.

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Camerons unique PBM metal-to-metal seal isstandard in all 15,000 psi WP systems and hasdelivered superior performance in nearly 20 yearsof installation history.


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18-3/4 15,000 psi WPHigh-Pressure Wellhead

w/Active Pre-Load Lockdown,

Gasket Seal and Hydrate Seal

36 Conductor Housing

w/Eight 3 Flow-By Holes

18-3/4 Wellhead Housing

20 x 0.812 Wall Extension

13-3/8 Casing

9-5/8 Casing

Seal Assembly (Typical)

Hydrate Deflectorw/Bullseye

16 Seal

Assembly

16

Receptacle

16 CasingHanger

20 x 0.812 WT Wellhead Housing Joint

36 x 2.0 WT Conductor Housing Joint

STM-15 Type DW5 Deepwater High-Capacity Subsea Wellhead System36 x 20 x 16 x 13-3/8 x 9-5/8 x 7

3 Ball Valvew/Pipe Extension(Typical Installation)

7 Casing

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16 Casing Hanger System

SUBSEA SYSTEMS


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STM-15 Type XL5

Deepwater Large Bore

Subsea Wellhead System

Camerons STM-15 Type XL5 Deepwater Large Bore Subsea

Wellhead System is rated at a full 15,000 psi WP for drilling

and completion operations in water depths up to 10,000 ft

(3048 m). This system is used when it is necessary to run 18

casing in addition to 16. The wellhead has an 18-1/2 mini-

mum ID bore in the bottom to pass 18 casing. As with the 16

casing hanger, the 18casing hanger has a landing adapter

that is welded into the 22 (instead of 20) casing below the

high-pressure housing and the 16 adapter, allowing installa-

tion through the riser and BOP stack. This wellhead system is

an ideal solution for shallow-water flows and to accommodatesmall bore-pressure/fracture gradient differentials.

Active pre-load lockdown at 2 MM lb

5.25 MM ft-lb bending capacity

3 MM lb tensile capacity

Machined from F-22, 85 ksi yield forged material

Available for H2S service

Multiple-landing shoulder with 7 MM lb end-loadcarrying capacity

18.63 Bore

18.510 Min. ID7 MM lb End-Load

Capacity LandingShoulder

STM-15 Type XL5Wellhead Housing

STM-15 TYPE XL5 DEEPWATER LARGE BORESUBSEA WELLHEAD SYSTEM

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Camerons unique PBM metal-to-metal seal isstandard in all 15,000 psi WP systems and hasdelivered superior performance in nearly 20 yearsof installation history.

The STM-15 Type XL5 Deepwater Large Bore Subsea Wellhead

System is used with the STM-15 trip-reducing, high-capacity

running tools and is available with the three most common

wellhead connection profiles. A standard 4130 extension joint isadded to the bottom of the high-pressure housing for

increased weld compatibility with various casing grades, and

other materials for the extension can be

supplied when required. Guide bases and

mud mats with hydrate seals and flow rings

are available upon request.


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18-3/4 Wellhead HousingSTM-15 Large Bore

Wellhead HousingRunning Tool

Active Lockdown

Assembly - Unlocked

16 Landing Sub

22 OD x 18.38 ID

16 PBMSeal Assembly

16 Casing Hanger

16 Casing Flush or

Near Flush CasingConnections

18 Landing Sub22 OD x 18.25 ID

18 Casing Hanger18.43 OD x 16.60 ID

18 Casing Flush

Casing Connections

18 Seal Assembly

18-3/4 Seal Assembly

9-5/8 Casing Hanger

Active LockdownAssembly - Locked

18-3/4 Typical Seal Assembly

36 Conductor Housing

13-3/8 Casing Hanger

36 Conductor Pipe

22 Extension Pipe

13-3/8 Casing

10-3/4 Casing

28 Receptacle

w/Vertical Flow-By

28 SupplementalCasing Hanger

28 Supplemental Casing

12 x 12 Mud Mat

w/Split Lock Ring Lipand Hydrate Seal

STM-15 Type XL5 Deepwater Large Bore Subsea Wellhead System36 x 28 x 22 x 18 x 16 x 13-3/8 x 9-5/8

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STM/STC SUBSEA WELLHEAD-TO-CONDUCTOR HOUSINGLOCKDOWN OPTIONS

The STC-10 wellhead has a similar passive lockdown mechanism which provides a 1.5 MM ft-lb bending capacity and 0.5 MM lb

tensile capacity.

STM-15 Type DW5 and XL5 wellheads are available with an active pre-loaded option using a mechanical lockdown tool. The two

housings are pre-loaded together using this mechanical tool resulting in a 2 MM lb pre-load which increases the bending capacity

to 5.25 MM ft-lb with a 3 MM lb tensile capacity.

The STM-15 Type XL7 is an active pre-loaded wellhead design with a 30 O.D. high-pressure housing which delivers 7 MM ft-lb

bending capacity and 5 MM lb tensile capacity.

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STC-10 Passive

Lockdown

STM-15 Type DW5,

STM-15 Type XL5 and XL7

2 MM lb Mechanical Lockdown

SUBSEA SYSTEMS


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STC-10 Compact Subsea

Wellhead System

The STC-10 Compact Wellhead System is a popular choice for

low-pressure wells up to 10,000 psi WP and moderate well

depths. Simplicity and attractive pricing make the STC-10

wellhead system a cost-effective choice.

The STC-10 wellhead system uses Camerons metal-end cap

(MEC) seal. This elastomeric sealing element is rated a full

10,000 psi WP and made of proprietary CAMLAST

elastomer which is rated for temperatures up to 250oF

(121o C). It is resistant to H2S, CO

2, chlorides, diesel fluid and

oil- or water-based amine corrosion inhibitors. Stainless

steel caps on the upper and lower surfaces of the elastomer

reduce extrusion limit exposure of the elastomers tocorrosive well fluids and discourage roll off during

installation. The MEC seal is highly tolerant to seal area

damage and will often seal when other types of seals will

not. The seal is radially energized and requires less energy

to set than other seals.

Available in a five-string casing program

Also available in a six-string program utilizing a

16 supplemental hanger system

Jet-in/drill-ahead tools are available for evenfaster run times

STC High-Pressure Housing Joint

18.69 Bore17.83 Min. ID3.5 MM lb End-Load

Carrying CapacityLanding Shoulder

STC-10 COMPACTSUBSEA WELLHEAD SYSTEM

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STC-10 Compact Subsea Wellhead System30 x 20 x 16 x 13-3/8 x 10-3/4

10-3/4 Casing Hanger

w/Inconel625 Inlay


13-3/8 CasingHanger w/Inconel 625 Inlay

STC-10 SealAssembly

13-3/8 Dummy Hanger

STC-10 30

Conductor Housingw/1.50 BWP Down

STC-10 18-3/4Wellhead Housing

w/H4 Profile,16 Receptacle and

20 x 0.625 BWP

Adapter w/ThreadedOutlet Ports

(Optional)

16 Receptacle16 Casing Hanger,16 3000 psi Seal

Assembly

Retrievable/Reinstallable

Guide Base w/0-5Slope Indicator

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3 Ball Valvew/Pipe Extension(Optional)

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Casing Hanger Seal Assembly

Running Tools for STM Subsea

Wellhead Systems

Casing Hanger Seal Assembly Running Tools (CHSARTs) are

single-trip tools that allow installation of the casing hanger

and PBM metal-to-metal seal assembly in a single trip.

Cameron offers these tools in a variety of load capacities and

sizes for all of our wellhead systems.

There are three tools available for the 18-3/4 15,000 psi WP

wellhead systems depending on the load requirement:

1 MM lb, 1.5 MM lb, and a special high-capacity tool for the

first position hanger which provides 2 MM lb load capacity.

These tools are installed in the casing hanger using left-hand

makeup and right-hand release. Unlike standard systems,

which set the seal by closing the BOP rams on the running

string and pressuring the annulus, Camerons CHSARTs use

pressure down the drillpipe to hydraulically set the seal.

Annulus pressure is used only to test the seal. This hydraulic

system generates 200,000 lb of force to set the seal and only

requires 3500 psi fluid pressure through the drillpipe.

Single-trip tools are also available for the XL5 wellhead

system for the 16 and 18 casing strings and for the DW5

wellhead system 16 casing string. A 13 CHSART is

available for the DW5/XL5 slimline drill-through

conversion system.

18 CHSART16 CHSART

Seal AssemblyRunning Tool (SART)

Mill and Flush Tool

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Drill Ahead Tool

MechanicalLockdown Tool

High-Capacity Running

Tools for STM-15 Subsea

Wellhead Systems

STM wellhead systems help reduce drilling costs

by eliminating unnecessary trips while providing

advanced pressure control technology with advanced,

trip-reducing, high-capacity running tools.

Camerons Drill Ahead Tool (DAT) allows for jetting in

the conductor, releasing the single-piece 1 MM lb load

capacity center stem and drilling ahead for the next

casing string. The tool permits a two-foot pickup of

the BHA without releasing the tool from the wellhead,

has a 6-5/8 standard top connection and drifts

10 collars.

Tools for running and handling the low- and

high-pressure wellhead housings are standard.

Camerons Mechanical Lockdown Tool (MLT) delivers a

2 MM lb mechanical pre-load between the low- and

high-pressure housings with a single 180,000 lb over-

pull, after running and landing the high-pressure

housing and 20/22 casing.

Installation of DW5 Wellhead Housing

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Jetting Drill Ahead

Landed Pre-Loaded

The center stem and BHA are released after jetting to drillahead and retrieved with the BHA after drill out.

A 2 MM lb pre-load is achieved witha single 180,000 lb over-pull.

Mechanical Lockdown ToolDrill Ahead Tool

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SUBSEA SYSTEMS


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Optional Trip-SavingRunning Tools

Bit or BHA-run wear bushings and wear sleeves are available for

all of Camerons wellhead systems, in addition to three BOP test

tools to cover all situations for testing the BOP stack.

There are special tools for running the primary seal, secondary

seal and emergency seal assemblies separately from the hanger,

along with mill and flush tools to clean debris from the seal

area for all casing hangers.

Stabilizer and Running Adapters

STM Parallel Bore

Metal-to-Metal (PBM) Seal

The PBM seal is used for casing hangers in the 18-3/4 15,000 psWP high-pressure housing and is interchangeable on all hangers

in the wellhead from 13-3/8 down to 7. It is radially engaged,

bi-directional and provides constant contact pressure on inner

and outer sealing surfaces. The PBM seal is designed for a

parallel sealing surface. It provides equal seal protection from

pressures above or below. Camerons parallel bore seal design

allows for vertical movement of the seal without affecting

seal integrity. During laboratory testing, the seal assembly was

moved as much as 1/4 while maintaining full test pressure of

15,000 psi. PBM seals are rated for continuous operation in

temperatures up to 350

o

F (177

o

C ) and can be used in H2Senvironments.

The PBM seal assembly and high-pressure housing design

provides for two additional contingency seals: an optional

elastomeric seal and a standard metal-to-metal secondary seal

that uses a protected, recessed area in the housing bore. The

lockdown feature for the seal to the wellhead has been physi-

cally tested to more than 1 MM lb at Camerons Technology

Development Center in Houston, Texas.

Standard Seal

Housing Lock Ring

Metal-to-Metal

Seals

Actuating Ring

Hanger Lock Ring

Retainer Wire

Standard Elastomer Seal

Metal-to-Metal Seals

Metal-to-Metal Seals

Standard O-Rings

Wellhead Housing

Recessed SecondarySeal Area

Casing Hanger

B

B

BB A

A

A A

Wear Bushing

Wear SleeveWear Bushingand Wear SleeveStabilizer

Wear Bushingand Wear SleeveRunning Adapter

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Cameron offers a variety of supplemental

hangers and running tools. In the 20 or 22

casing strings below the high-pressure housing,

individual adapters can be used to suspend

and seal 16 hangers, both standard (3000 psi

WP/500,000 lb) and high-capacity (5000 psi WP/

1 MM lb). The XL high-pressure 16 hanger is

rated 6500 psi WP with metal-to-metal seals and

1 MM lb hang-off capacity. An 18 adapter and

hanger with a 3500 psi WP elastomeric seal and

1 MM lb hang-off capacity also is available for

use in Camerons STM-15 Type XL5 large-bore

subsea wellhead system.

Supplemental Hanger Systems for STM-15 and

STC-10 Subsea Wellhead Systems

18 SupplementalHanger

Locked toAdapter

SealAssembly

LandingShoulder

Adapter

Hanger

16 XL High-PressureSupplemental Hanger

Locked toAdapter

LandingShoulder

Adapter

Hanger

Locked toHanger

PBM SealAssembly

16 High-CapacitySupplemental Hanger

Locked toHanger

Seals

LandingShoulder

Adapter

Hanger

LockdownRing

STM Large Diameter Shoulder-Type Supplemental Hangers

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Cameron offers a variety of shoulder adapters for

supplemental hangers and running tools located belowthe low-pressure wellhead in the 30 or 36 conductor

string. Weld-in shoulder type adapters and hangers can

be used for suspension and sealing of 26 and 28

supplemental casing strings.

26/28 Receptaclew/No Flow-By

26 Receptaclew/Horizontal Flow-By

26 Receptaclew/Vertical Flow-By

26/28 Casing Hanger

26/28 Casing HangerRunning Tool

6-5/8 Box

4-1/2 Pin

4-1/2 IF

Lock Dogs

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Innovation and Quality

CAMERON IS A LEADER INTECHNOLOGY DEVELOPMENT

Camerons Technology Development Center is located

in Houston, Texas, and is equipped with state-of-the art

analysis and testing equipment. Cameron engineers

and technicians can perform a wide range of testing

procedures on new and existing products to help ensure

performance in the field.

TEST LABORATORY STATE-OF-THE-ART CAPABILITIES

Erosion A drilling fluids flow loop simulates the ero-sive effects of cuttings and sand flowing up from thewell during drilling. It can circulate up to 6.2 barrels peminute at 5000 psi WP.

Flow Loop It empirically determines the flowcharacteristics, Cv, of various flow control devices.

Fatigue A load frame with a fixed tail stock on one end

and a rotating spindle on the other is used for dynamicbend testing with up to 20,000 lb of deflection load toprovide simulation of undersea wave action.

Pull/Push Rams Large hydraulic rams simulate tubingand casing loads on wellhead slips and hangers or drill-

pipe suspension loads on ram BOPs.

Test Pits Two 25-ft deep floodable test pits allow as-sembly of tall equipment such as BOP stacks. With aspecially constructed cover in place, they can serve as ablast mitigation chamber for higher-risks tests.

Corrosion A salt fog cabinet is used for acceleratedcorrosion testing on samples. It is used for corrosiveresistance evaluation of coatings, plating and corrosioninhibitors.

Subsea Pressure The hyperbaric chamber is rated forpressures of water depths in excess of 10,000 ft (3048 m)

Pressure Hydrostatic testing is performed with avariety of pumps capable of producing up to 40,000

psig. Gas testing is conducted in reinforced test cellswith gas boosters generating up to 36,000 psig.

Bending Two large test frames are available forstructural bending and torsion tests. The larger framecan sustain up to 15 MM ft-lb of bending load.

Temperature Extremes Several test chambers areutilized for testing at temperatures ranging from-100o F to 500o F (-73o C to 260o C).

Hot Oil One fixed 106-kw and two portable 30-kwhot-oil circulating units produce internal bore temperatures up to 400o F (204oC) on products as large asa subsea BOP or as small as a 2 gate valve.

Experimental Stress Analysis Hundreds of bondedresistance strain gauges, used primarily for empiricalverification of finite element analysis, are available foruse during testing.

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CAMERON INTERNATIONAL MALAYSIA SYSTEMSCENTER OF SUBSEA WELLHEAD MANUFACTURING EXCELLENCE

The Cameron International Malaysia Systems (CIMS) manufacturing facility is Camerons center of excellence for

the manufacture of subsea wellhead systems worldwide. The plant offers unique and highly efficient systems

and equipment specifically tailored to the production of subsea wellhead systems.

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SUBSEA SYSTEMS


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SUBSEA SYSTEMS

PO Box 1212

Houston, Texas 77251-1212 USATel 1.713.939.2211

5 Mondial Way

Harlington

Hayes, UB3 5AR

England, UK

Tel 44.208.990.1800

Level 11, 12-14

The EsplanadePerth, Western Australia

6000

Tel 61.8.9483.4444

Learn more about subsea

wellhead systems at:

www.c-a-m.com

or email:

[email protected]

HSE Policy StatementAt Cameron, we are committed ethically, financially and personallyto a working environment where no one gets hurt, nothing gets harmed.

introductory to well head

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