Cameron SSMC Wellhead

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SSMC

™

Wellhead System

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T

he SSMC Wellhead System is a total system designed to accommodate a variety of casing programs and working pressures, while using a maximum number of inter-changeable components. The SSMC wellhead has many technical advantages over a conventional wellhead system including: reduced height, enhanced safety, savings in rig time, through BOP opera-tions, and a decrease in system cost. In addition, many com-ponents of the conventional wellhead are eliminated by using a single compact hous-ing for multiple cashous-ing and tubing hangers.

This modular design, with all internal components inter-changeable throughout, means 30% fewer parts and reduced inventories.

SSMC Wellhead System Features

Enhanced Safety

• Reduced number of BOP connections.

• Minimum penetrations in wellhead, no lock screws. • _{Through BOP/diverter operations.}

• Fast make-up connectors. • Mud returns via riser.

Rig Time Savings

• Simple system installation.

• Reduced number, faster BOP connections. • Weldless diverter connection.

Lower Maintenance

• Reliable, simple, field-proven design. • No lock screws, minimum leak paths. • _{No plastic packing required.}

• Continuous control lines.

Reduced Inventory

• Modular design, interchangeable components.

Flexibility

• Wide range of casing programs available with options to land up to two strings of casing as well as tubing in a compact housing.

• Wide range of tubing programs including single, dual and tension tubing hangers. • Smaller workover BOP tubing hanger options available.

• Identical seal assemblies for each stage with either LS or MEC seals.

• _{Same internal components used on Cameron Conductor Sharing Wellhead (CSW™)} • _{Field proven for tieback to mudline.}

Time Savings Comparison (Conventional vs SSMC Wellhead) Typical for 13-5/8”/20-3/4” System (30” x 20” x 13-3/8” x 9-5/8” x Tubing)

Description of Operation Conventional SSMC Time Savings 30” Conductor

Weld diverter connection and nipple up. 9.50 Hours 6.25 Hours 3.25 Hours

20” Casing

Run 20” through diverter, land on landing ring, 29.25 Hours 22.00 Hours 7.25 Hours install BOP, versus slip-on weld housing.

13-3/8” Casing

Wait on cement, spool nipple up, install BOP, 27.00 Hours 15.50 Hours 11.50 Hours prepare 13-3/8” casing, install slips.

9-5/8” Casing

Wait on cement, spool nipple up, install BOP, 33.50 Hours 2.00 Hours 31.50 Hours prepare 9-5/8” casing, install slips.

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SSMC Wellhead System

The SSMC is available in a range of nominal sizes from 7-1/16” through 18-3/4” and in working pressures up to 10,000 psi. The design and manufacture meets API 6A standards and systems can be supplied to meet the complete material class, temperature rating and PSL level requirements of this specification.

FlangeLock Connector

Tubing Hanger Continuous Control Line Snapring Snapring SRL Seal (Tubing Hanger) CF Gasket * LS Annulus Seal (Tubing Hanger) * LS Annulus Seal (Casing Hanger) Casing Hanger Conductor Landing Ring 30” Conductor * MEC Seals are Available as Alternate

Seals on Casing and Tubing Hangers

20” Casing 13-3/8” Casing 10-3/4” Casing Tubing 1/4” Control Line 13-5/8” Nominal Compact Housing SD016743 SD016814 Option without 20” Casing

Typical 13-5/8” Nominal SSMC Wellhead

20-3/4” Nominal Casing Head Housing

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The SSMC wellhead offers a selection in sealing technology which increases versatility and ensures that the wellhead is adaptable for any production environ-ment.

Seals available for the SSMC seal assembly include LS elastomer seals and the popular, Cameron-exclusive Metal End-Cap (MEC) seal.

An additional feature of the SSMC sys-tem is the snapring lockdown incorporat-ed into all elastomeric seal assemblies and tubing hangers.

The seal assembly is run on a threaded running tool that retains the snapring until landed. Backing off the running tool releases the snapring which is naturally biased to spring into the lock groove in the housing. An overpull ensures the cor-rect engagement of the seal assembly. The seals are tested via a test port in the housing prior to retrieving the running

tool. The top face of the seal assembly serves as a landing shoulder for the next stage hanger.

S Seal

The S seal is a one-piece elastomer inter-ference-type seal used as either an annu-lus seal or tubing hanger neck seal. It uses continuous 316 stainless steel garter springs molded into the two exposed corners of the seal to prevent extrusion.

LS Seal

The LS seal is a cost-effective, field-proven, elastomer interference seal used as an annulus seal. The LS seal is a larger, more robust version of the S seal and can tolerate surface imperfections such as those caused by casing centralizers and larger running clearances.

T

he ability of a wellhead to withstand pressure is determined in great part by the integrity of its sealing system. In addition, the seals must be designed to match the service application in which they are used. That is why the Cameron SSMC wellhead system features a choice of elastomeric seals on seal assemblies, and metal-to-metal seals on tubing hanger necks.

Seals available for the SSMC include metal-to-metal seals in primary sealing applications, and either LS elastomer seals or the Cameron-exclusive Metal End-Cap (MEC) Seal in the annulus. Metal seals meet the requirements of API 6FB fire specifications. All elastomer seals are available in premium elastomer materials developed by Cameron Elastomer Technology specifically for oilfield applications.

The MEC seals combine metal end-caps, premium elastomer material, and the patented radial squeeze sealing method to ensure wellhead dependability, extended service life and ease of operation. Hundreds of MEC seals have been installed in platform and subsea wellhead applications.

SSMC Wellhead Seal Selection Chart

Seal Application Type

S Seal Annulus Elastomer Seal with Stainless Tubing Hanger Neck Steel Garter Springs

LS Seal Annulus Elastomer Seal with Stainless Steel Garter Springs

MEC Seal Annulus Elastomer Seal with

Metal Shells

T Seal Annulus Emergency Elastomer Seal with Metal Back-Up Rings to Prevent Extrusion

SRL Seal Tubing Hanger Neck Metal Lip Seal

CF Gasket Between Connections Metal

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S Seal

SRL Seal

LS Seal MEC Seal

T Seal CF Gasket

Metal-End-Cap (MEC) Seal

MEC seals are radially squeezed, pres-sure-energized elastomeric annulus seals. Metal shells provide a zero gap extrusion barrier that eliminates expos-ing the elastomer material to the corro-sive well bore environment. MEC seals can tolerate surface imperfections such as those caused by casing centralizers, MEC seals are available with the Cameron-exclusive CAMLAST™ pre-mium elastomer for 350° F service.

T Seal

The T seal is a cost-effective, field-proven elastomeric interface seal used as an annulus seal to seal on un-machined casing in emergency situations. It uses square section rings in the corners to prevent extrusion.

Straight Radial Lip (SRL) Seal

The SRL seal is a straight bore sealing, radial interference, pressure-energized metal lip seal primarily used on tubing hanger necks.

CF Gasket

The CF gasket is used in conjunction with the Cameron FastLock and FlangeLock connectors (see page 6) to form a metal-to-metal seal between wellhead connections. Its design reduces pressure end-loads and allows lower make-up torque.

SD016803 SD016804 SD016807 SD016803 SD016804 SD016804 T Seals S Seals LS Seals SRL Seals CF Gasket MEC Seals

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FlangeLock™Connector

The FlangeLock connector is designed as a low cost connection for 5000 psi WP applications. It can be bolted directly onto FastLock connector hubs. This allows for a smaller, more cost-effective overall connection and provides maxi-mum flexibility for drilling and workover operations.

FastClamp™_Connector

The FastClamp connector fits standard clamp hub profiles using conventional API ring gaskets. FastClamp sections are pre-installed on the hub via the guide rods to eliminate safety concerns in handling the sections during installa-tion. Low make-up torque increases ease of installation.

Emergency Equipment

The SSMC wellhead includes a full range of casing slip-based emergency options, should the casing “stick” dur-ing installation. With the split compact wellhead, separating the upper and lower sections allows conventional use of slips and facilitates pipe cutting. In the non-split wellhead, internal casing cutters are used to prepare the casing for the seal assembly.

FlangeLock Connector FastLock Connector

Slip Suspension for Surface Casing

Slip Suspension for Production Casing

SD016812 SD016812

SD016260 SD016220

Fast Make-Up Connections

The SSMC wellhead incorporates two Cameron-exclusive fast make-up meth-ods to connect the Christmas tree to the compact housing, the FastLock and FlangeLock Connectors. On the split SSMC wellhead system, the FastClamp connector is used between the upper and lower housing.

FastLock™Connector

The FastLock connector is designed as an efficient replacement for flanged connections on surface wellheads. Its low torque allows for fast make-up and saves rig time. Typically, FastLock connectors would be installed on land and platform BOP stacks taking full advantage of the installation time sav-ings offered by this unique design.

FastClamp Connector

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S p l i t S S M C W e l l h e a d

Split SSMC Wellhead System (Shown with Dual Tubing Hanger)

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he Split SSMC Wellhead System

is a split version of the standard SSMC Wellhead System. This split ver-sion uses many of the same components and offers the same advantages as the standard SSMC, but offers the following added features:

• Wellhead housing can be supplied with all annulus equipment installed and tested. All annulus connections are located on the upper section of the system.

• Emergency casing hanger installation is performed without internal casing cutting.

• Offers maximum maintainability, as annular seals, seal faces and wellhead housing can be replaced or repaired without disturbing the casing.

SD016815 Dual Tubing Hanger FlangeLock Connector Continuous Control Line Snapring Snapring LS Annulus Seal (Casing Hanger) Split Housing FastClamp™ Connector Annulus Pack-Off Casing Hanger

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© Cooper Cameron Corporation, Cameron Division, Printed in USA, 7/99, TG/5M, WR10004/TC1277 Western Hemisphere Cameron PO Box 1212 Houston Texas 77251-1212 Tel 713 939 2211 Fax 713 939 2620 http://www.camerondiv.com Eastern Hemisphere

Cooper Cameron (U.K.) Ltd. 5 Mondial Way

Harlington Hayes UB3 5AR Tel 44 181 9901800 Fax 44 181 9901888 http://www.camerondiv.com

Asia Pacific/Middle East

Cooper Cameron (Singapore) Pte. Ltd. No. 2 Gul Circle, Jurong Industrial Est Locked Bag Service No. 3

Jurong Town Post Office Singapore 2262 Republic Of Singapore Tel 65 8613355 Fax 65 8616197

http://www.camerondiv.com