Fmc Casing Hanger

Cameron MBS Multi-Bowl Wellhead System

M B S M u lt i-B o wl Wellh ead Sys t em

Tubing Head Adapter

Tubing Hanger

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Upper Casing Spool

Emergency Slip and Seal Assembly Pack-off Bushing

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Casing Hanger

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Lower Casing Head

Standard MBS Casing Hanger and MBS Pack-off Support Bushing

Emergency IC-1 Casing Hanger and MBS Pack-off Support Bushing

SD016672

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MBS Multi-Bowl Wellhead System

T

he Cameron MBS Multi-Bowl Wellhead System is a compact, unitized wellhead which can be used as an alternative to conventional wellhead systems in onshore and platform applications. The MBS Wellhead offers the following advantages over conventional systems: •

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Pack-off Bushing •

The lower and upper casing heads are installed as a single unit, saving installation time. The casing and tubing can be installed, landed and sealed through the BOP stack, increasing safety and saving rig time normally required to remove and reinstall the BOP stack during conventional wellhead installations. Uses many conventional wellhead components and practices.

Components of the MBS Wellhead System are based on field-proven technology and offer a range of features including:

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The lower casing head incorporates a slip-on weld  bottom connection with a single O-ring to seal between the casing stub and the casing head inside diameter. The lower casing head is available with line pipe threaded, flanged or studded outlets. The casing head incorporates a straight-bore design with a 45° load shoulder for casing hanger support. This design minimizes hoop load on the housing, provides a high hanging capacity and reduces the risk of bowl damage due to drill stem rotation.

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The spool is available with studded outlets.

Casing Hanger •

The MBS Wellhead casing hanger is a high-capacity, mandrel-type hanger which is rated to the full joint strength of the suspended casing.

The MBS Wellhead tubing hanger lands on the pack-off   bushing and is locked in place with N lockdown screws. Several alternative tubing hangers are available including the coupling (HT, HT-2), tubingless (TLC), mandrel (CXS, T), and dual (MB-CDT and MB-TLC). Control line options are available for most applications. A comparison of these tubing hangers is available on the MBS Tubing Hanger Comparison chart.

The MBS tubing head adapter provides the connection point for the Christmas Tree. It is available in several types to fit individual applications.

Emergency Slip and Seal Assemblies •

The upper casing spool is a straight-bore design. The casing spool includes two sets of type N lockscrews to lockdown wellhead components. These lockscrews are designed with the packing in front of the threads to prevent contamination of the threads by wellbore fluid.

The inner seal on the bushing is a D seal which is energized by plastic packing. This seal can be reenergized, if  necessary, throughout the life of the well. The outer seal is radially energized.

Tubing Head Adapter

Upper Casing Spool •

The MBS Wellhead pack-off bushing lands on the casing hanger to suspend and seal the intermediate casing string(s).

Tubing Hangers

Lower Casing Head •

The hanger is designed with integral flutes which allow cement returns to pass up through the BOP stack.

In the event that casing becomes stuck and slips must be set, the upper casing spool may be lifted to install a sliptype hanger, cut off the casing and install the emergency pack-off bushing assembly. This feature eliminates the expensive, time consuming process of cutting pipe inside the head with internal casing cutters.

Auxiliary Equipment •

The MBS Wellhead System has a complement of installation tools including BOP test plugs, wear bushings and handling tools.

M BS C om po ne nt O pt i on s

Standard Casing Hanger and Pack-off Bushing

Emergency Casing Hanger and Pack-off Bushing

SD016670

SD016670

MBS Pack-off Support Bushing

MBS Emergency Pack-off Support Bushing

MBS Dual Pack-off Support Bushing

MBS Dual Emergency Pack-off Support Bushing

SD016670

SD016670

MBS Fluted Casing Hanger

IC-1 Emergency Casing Hanger

Wellhead Options

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SD016671

MBS Multi-Bowl Wellhead

MBS Multi-Bowl Wellhead with Trulok™ Bottom

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M B S Tu b i n g H a n g e r O p t i o n s

HT Completion

HT-2 Completion

TLC Completion

CXS Completion

SD016669

T Completion

MB-TLC Dual Completion

MB-CDT Dual Completion

MBS Tubing Hanger Comparison Name

Single/Dual

Type

Body Seal

Neck Seal

Control Line

HT

Single

Coupling

Elastomer

Elastomer

None

HT-2

Single

Rotatable Coupling

Elastomer

Elastomer

None

TLC

Single

Mandrel

Elastomer

Metal

None

CXS

Single

Mandrel

Elastomer

Elastomer

Optional, Non-Continuous

T

Single

Mandrel

Elastomer

Metal

Optional, Continuous

MB-TLC

Dual

Split

Elastomer

Elastomer

None

MB-CDT

Dual

Split

Elastomer

Metal

Optional, Continuous

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 England Tel 011 44 181 990 1800 Fax 011 44 181 990 1888 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

Cameron and Trulok are trademarks of the Cooper Cameron Corporation

© Cooper Cameron Corporation, Cameron Division, Printed in USA, 2/98, TG/3M, WR6576/TC1262