Weatherford SET

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®

MetalSkin

Solid

Open and Cased Hole

Expandable Systems for

Reduce installation risks while driving down well

construction costs and mitigating drilling hazards.

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Building on our expandable heritage

Expandable experience

Expansive thinking

Expanding understanding

Expanded coverage

Weatherford is the world's most experienced provider of ERC™ expandable reservoir completions using slotted and solid expandable

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products. We've been there. We've installed more than 450 ESS expandable sand screen systems alone worldwide.

For well construction, completion and remediation applications, Weatherford has pioneered major advancements in expandable technology since the mid-1990s. The revolutionary ESS expandable sand screen changed the face of sand control, with our exclusive compliant tubular expansion eliminating annular space to enhance borehole support and sand filtration.

Weatherford's slotted expandables experience provided a solid

foundation for the development of solid expandables. One of the very first

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of our solid expandables innovations was our ABL alternative borehole liner, introduced over a decade ago. We've transferred all of our slotted

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tubular application and operational experience to our MetalSkin solid expandable open-hole and cased-hole products. These products provide unique solutions for any number of applications ranging from isolation of troublesome formations during drilling to casing repair.

Weatherford has a deep understanding of the operational envelopes of expanding solid tubulars in wells. We know how to engineer a low-risk installation. And we've conducted detailed studies of more than 100 of our installations to further deepen our understanding.

Weatherford expandables are supported by a worldwide network that includes two of the industry's largest R&D, testing and training facilities. We custom-build expandable systems at our eastern- and western-hemisphere manufacturing facilities.

1995 First commercial application of slotted alternative bore hole liner (ABL) tubulars

1999 Weatherford acquires Petroline and commercially launches the ESS system First horizontal ESS application

2000 Weatherford begins developing solid expandables

Record-setting ABL installation

2001 Weatherford’s longest ESS installation to date

First multizone ESS application

2002 First Weatherford solid expandable liner hanger system installed

First Weatherford MetalSkin cased-hole system deployed

2003 The 225th ESS installation

2004 More than 300 ESS systems have been installed around the world

2005 World’s first 7-in. expandable isolation system successfully installed

2006 New-generation MetalSkin open-hole liner successfully installed

2007 Commercial launch of new-generation MetalSkin systems

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solid reasons why MetalSkin expandables are

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Slimmer system design provides greater running clearance to avoid problems associated with equivalent circulation density (ECD) and differential sticking.

The full potential of solid tubular expandable technology to revolutionize well construction is now being realized. Weatherford's new-generation MetalSkin solid expandables are reducing installation risks while driving down construction costs and minimizing drilling hazards.

MetalSkin systems leverage cutting-edge

technologies to provide critical performance advantages. The systems are far less problematic and more cost efficient than first-generation expandables.

In fact, these advanced expandable systems offer seven significant advantages that can spell the difference between success and failure.

Solid performance advantages

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Collapsible expansion cones facilitate contingency retrieval.

Fully qualified premium metal-to-metal expandable connectors provide unmatched performance and reliability.

Work-string/liner interface design prevents premature initiation of expansion as the expandable system is worked to bottom.

Elastomer sealing elements provide positive zonal isolation without cementing.

Hydraulically assisted backup expansion system reduces contingency costs.

Lower expansion pressure requirement and high-integrity circulation valve enhance expansion reliability.

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MetalSkin open-hole liner systems maximize your field's ROI by reducing

construction costs with slimmer top-hole casing sections while upsizing the completion. Isolate problem

zones, and drill ahead. talSk e in M _O p_e n -H o le L in e r talSk e in M _O p e_n -H o le L in e r alS t k e in M C a se_d -H o le L in e r

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MetalSkin cased-hole liner systems answer mature-field challenges by permanently repairing corroded or parted casing. Elastomer seal bands give more reliable zonal isolation than

cement squeezes and don't significantly reduce well ID as

do scab liners. 8 e g a p

MetalSkin monobore open-hole

liner systems let you gain an extra

string of casing with no loss of hole size. Drill out with the same size bit.

Remediate drilling hazards such as lost circulation and overpressured zones. alS t k e in M M o_n o b o re O p e n -H o le L ine r

MetalSkin monobore open-hole clad

systems selectively isolate trouble

zones as they are encountered so that drilling can continue without sacrificing hole size. After the clad is expanded to seal the zone, another clad can be

passed through it to treat the next trouble zone

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MetalSkin open-hole liner system

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The MetalSkin open-hole liner system is a solid expandable drilling liner that reduces well construction costs with the ability to provide an additional casing string while conserving hole size. This system enables the drilling of previously undrillable wells.

Pre-planned operations: Maximize your field's ROI by increasing hole

size and exposure in the reservoir and upsizing the well's completion. Reduce construction costs by maintaining the required well geometry through the reservoir while slimming down the top-hole casing sections.

Contingency applications: The MetalSkin system helps mitigate

drilling hazards by letting you isolate problem zones and drill ahead without resorting to downsizing the well's completion.

Remediating well construction challenges: The

MetalSkin system effectively deals with lost-circulation

zones, overpressured formations, zones with shallow flows, and premature casing sets.

Solid ideas for expanding your options

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Bottom-up expansion

The MetalSkin system eliminates risk-inducing factors such as tight running clearances, nonretrievable cones and underreaming. Bottom-up expansion of the system is

hydraulically assisted with the use of a unique collapsible cone. Systems are available in lengths up to 6,500 ft (1,981 m).

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Solid advantages and benefits

Unique design maximizes running clearance to minimize effect on ECD

and run time; helps avoid differential sticking.

Optimal-yield base pipe reduces expansion pressure requirements by

33 percent to reduce operational risk and maintain the integrity of the liner and its post-expansion collapse resistance.

Collapsible, retrievable expansion cone avoids becoming stuck by retracting

for retrieval at any time—even when the pipe is only partially expanded.

Metal-to-metal expandable connectors exceed proposed API standards in

testing for burst, collapse, tensile and compressional resistance.

Hydraulically assisted expansion balances pressure across the cone so that

a seal does not form on the cone face and forces tending to swage the cone are minimized, greatly improving system reliability and avoiding the risk of flow erosion of the casing.

Hydraulic jack reduces risk of costly delays by serving as a backup system to

resume expansion of the casing in the event pressure is lost during expansion.

Primary pressure seal contains expansion pressure with much greater

consistency through the use of a valve system rather than relying on the use of darts to create and maintain the system's pressure seal.

Elastomer sealing elements reduce well construction costs and risks by

providing zonal isolation without underreaming and cementing.

The MetalSkin system cuts well construction costs by reducing the need to telescope down to smaller and smaller casing sizes. You can start drilling with smaller-diameter upper-hole sections and finish with the same size or larger hole sections for optimal production string sizes.

Conventional Well Design MetalSkin Well Design 20 in. 16 in. 13-3/8 in. 9-5/8 in. 7 in. 16 in. 11-3/4 in. 7 5/8- x 9 5/8-in. solid expandable system 7 in. 13-3/8 in. 11-3/4 in. 9-5/8 in. Running sequence

Run in hole, and circulate. Drop ball, assemble cone and expand launcher. Cement well (if required).

Close seal valve, and expand liner.

Expand liner hanger.

Drill out shoe.

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MetalSkin monobore open-hole

liner system

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The MetalSkin monobore open-hole liner system eliminates the slimming of a well profile during well construction. An oversized shoe is run into the hole with the previous string of casing, and the liner extension is then run to total depth and expanded back into the oversized shoe. This technique provides a string with the same diameter as the one above it. You gain a string of casing with no loss of hole size. Drill-out is made with the same size bit.

Planned contingency operations: Running the oversized shoe with

the previous string doesn't lock you into running the MetalSkin monobore open-hole liner system. You can choose to run another string of

conventional casing.

Remediating well construction challenges:

Lost-circulation zones, overpressured formations and zones with shallow flows. These and other problems

encountered downhole are minimized with the

MetalSkin monobore open-hole liner system.

Gain a string without losing hole size

After it is installed at the bottom of the previous casing string, the oversized shoe can be drilled out with conventional bottomhole drilling assemblies. This simple design provides a full bore in the overlap between the monobore open-hole liner system and the parent casing string, reducing operational risk by eliminating the need to over-expand the shoe track to receive the expanding MetalSkin system.

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MetalSkin monobore

oversized shoe

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Solid advantages and benefits

Unique design maximizes running clearance to minimize effect on ECD

and run time; helps avoid differential sticking.

Optimal-yield base pipe reduces expansion pressure requirements by

33 percent to reduce operational risk and maintain the integrity of the liner and its post-expansion collapse resistance.

Oversized shoe with flush joint connector facilitates drill-out with no

loss of hole size.

High-collapse-resistance casing enhances reliability with the ability to

withstand high external pressures.

Collapsible, retrievable expansion cone avoids becoming stuck by retracting

for retrieval at any time—even when the pipe is only partially expanded.

Metal-to-metal expandable connectors exceed proposed API standards

in testing for burst, collapse, tensile and compressional resistance.

Hydraulically assisted expansion balances pressure across the cone so that

a seal does not form on the cone face and forces tending to swage the cone are minimized, greatly improving system reliability and avoiding the risk of flow erosion of the casing.

Hydraulic jack reduces risk of costly delays by serving as a backup system

to resume expansion of the casing in the event pressure is lost during expansion.

Primary pressure seal contains expansion pressure with much greater

consistency through the use of a valve system rather than relying on the use of darts to create and maintain the system's pressure seal.

Elastomer sealing elements reduce well construction costs and risks

by expanding to form an expandable liner hanger. Elastomer sealing elements placed on the expandable casing can be used to obtain zonal isolation without underreaming and without cementing.

Running sequence

18-5/8 in. 13-3/8 in.

9-5/8 in.

7-in. casing/liner

5-in. liner 7-in. liner

The MetalSkin system improves well productivity and reservoir recovery. You can complete the reservoir section in a larger hole size and with one casing string fewer to surface.

9 5/8-in. casing 13-3/8 in. casing with Weatherford 14 1/2-in. oversized shoe 18-5/8 in. casing 11 3/4-in. 13 3/8-in. MetalSkin monobore open-hole liner ´ Conventional Well Design MetalSkin Well Design Install base casing with oversized shoe.

Drill out shoe, and underream hole section. Run in hole with monobore open-hole liner system. Cement well (if required), assemble cone and initiate expansion. Expand monobore shoe extension system. Expand liner hanger.

Drill out shoe.

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MetalSkin cased-hole liner system

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Solid answers to mature-field challenges

The MetalSkin cased-hole liner system is designed to deal with challenges such as excessive water production, reservoir sweep inefficiency and aging wells. The threaded expandable tubular joints can be connected to create a system of any length. The system is a permanent solution that bridges the gap between cement squeezing and scab liners while conserving hole size.

Solid remediation solutions: Using expandable threaded casing, the

MetalSkin cased-hole liner system provides solid remediation solutions.

The system has high burst and collapse resistance and provides a long-term seal against deformed, worn, corroded, eroded or parted casing.

MetalSkin liners are ideal for casing off perforations and bad casing so

that you can selectively reperforate to access bypassed pay. And the liners greatly facilitate deepening of mature wells.

Alternative to cement squeezes and straddle packers:

The MetalSkin system gives you a solid alternative to cement squeezes and straddle packers for permanent

zonal isolation. The double security of an expanded liner plus elastomer seal elements that are molded to

the OD makes the MetalSkin system more reliable than a cement squeeze. And with the MetalSkin

system, you end up with an ID that is larger than possible with a straddle packer.

Shutting off unwanted water: The MetalSkin

cased-hole liner system is effective for shutting off unwanted water and enhancing oil production. It also provides positive sealing of laterals and sidetrack windows, depleted production zones and injection intervals as well as unwanted perforations. You can solve reservoir sweep inefficiency problems by

permanently sealing off thief zones in injection wells created by bad pipe or unwanted perforations. The system is also ideal for remediating subsidence-damaged casing.

The MetalSkin system provides superior efficiency and economy, requiring no drill-out as with other expandable cased-hole liners and conventional systems. alS t k e in M C_a se_d -H o le L in e r

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Solid advantages and benefits

Elastomer sealing elements aid pressure containment

by expanding between the cased-hole liner and the parent casing to seal across the problem area. The result is more positive and permanent zonal isolation than with a cement squeeze through a straddle packer. And the MetalSkin liner has a larger ID than the packer system to facilitate access to lower zones. The MetalSkin system also helps avoid multiple cement squeezes, which result in downtime and reduced reservoir recovery.

Large ID for the full length of the expandable system maximizes production and injection rates and provides

better access for future intervention operations.

Launcherless system increases operational reliability

by avoiding surge problems or becoming stuck, as can happen with oversized launchers (cone housings) or shoes. With the MetalSkin system, the cone is run below the expandable casing; so no launcher is required.

Hydraulic jack protects casing and connectors because

the expansion pressure is contained within the jack rather than subjecting tubulars to expansion pressure cycles.

Running sequence

A MetalSkin cased-hole liner system can be set as a packer seat to enable fracturing of lower bypassed pay. A second MetalSkin system can be used to isolate watered-out upper perforations before selective re-perforating.

Run bit and scraper to clean corrosion

from base over interval to be

remediated.

Run in hole with the

MetalSkin

cased-hole liner.

Expand the

MetalSkin anchor

with the running tool.

Continue expanding the MetalSkin liner

with direct pull.

Cone exits top of fully expanded

MetalSkin liner, and

expansion tools are retrieved.

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MetalSkin monobore open-hole

clad system

The MetalSkin monobore open-hole clad system is a solid expandable system for solving wellbore problems and mitigating hazards. It provides a much faster and more cost-efficient method than pumping thicker muds and cement in an attempt to seal a formation or stabilize a sloughing formation. The solid steel barrier keeps the formation from falling in and fluid from flowing out.

Wellbore instability and lost-circulation problems: This low-risk

MetalSkin system provides zero loss of hole size after installation.

Multiple clads can be run (passing one clad through another—a clad-through-clad effect) to provide the same drift as the hole after

installation. Zonal isolation is achieved without tying the system back to the previous casing shoe. The system is ideal for

treating lost-circulation zones, overpressured formations, zones with shallow flows and sloughing formations.

Solid drilling security: The MetalSkin monobore

open-hole clad system mitigates the risks of drilling trouble zones without forcing you to line the entire

wellbore. The trouble zone is minimally underreamed (1.0 in.), and the clad system is

expanded into it. You can then resume drilling with the same size bit (because the clad allows full bore access) and complete the well as planned, without downsizing.

Solid answers for drilling hazard mitigation

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Solid advantages and benefits

Selective isolation reduces risk exposure and costs because the MetalSkin

monobore open-hole clad system is typically short and is not tied back to the casing. You isolate only the area that needs attention, such as sealing off trouble zones.

Clad-through-clad flexibility lets you run and expand a clad to seal off one

trouble zone, continue drilling with the same size bit, and run additional MetalSkin open-hole clad systems to resolve any additional problems encountered farther downhole.

Mitigate the risks of drilling trouble zones without having to line the entire

wellbore. MetalSkin clad systems are typically only 100 to 750 ft (30 to 229 m) in length, which minimizes operational risks and installation costs.

No loss of hole size means optimal production and intervention access. Only a 1-in. underream is needed to allow the system to be completely

recessed into the wellbore.

Elastomer bands wherever required along the system's length create pipe-to-formation seals and promote the positive anchoring of the MetalSkin

monobore open-hole clad system.

The monobore effect of the MetalSkin open-hole clad system lets you slim the well to reduce well construction costs. Drilling a smaller hole, using

smaller-size casing in the upper sections, and using little or no cement create significant savings of time and materials while maintaining an optimal size completion.

18-5/8 in. 13-3/8 in.

9-5/8 in.

7-in. casing/liner

5-in. liner 5-in. liner 7-in. liner

9-5/8 in.

After the MetalSkin monobore open-hole clad is expanded to seal a trouble zone, another clad can be passed through it to isolate the next trouble zone encountered. Drilling can proceed to the planned total depth of the hole section, at which point a conventionally cemented casing program can be installed. Conventional Well Design MetalSkin Well Design Running sequence Bi-center drill or ream wellbore in the

trouble interval.

Run the MetalSkin system in hole, and begin to expand the

bottom hanger.

Expand the clad. Expand the top clad, and pull out of hole with the running tool.

Drill ahead with no loss of hole size.

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Weatherford's MetalSkin systems are the most advanced

solid expandables available today.

Now is a good time to learn how they can help reduce your

well construction costs, mitigate drilling hazards and

increase reservoir exposure and production. Talk to the

world's most experienced expandable experts with the most

advanced line of products.

Find out more at

www.weatherford.com/metalskin.

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515 Post Oak Blvd., Suite 600 Houston, Texas 77027 Tel: 713-693-4000 www.weatherford.com

Weatherford products and services are subject to the Company’s standard terms and conditions, available on request or at www.weatherford.com. For more information contact an authorized Weatherford representative. Unless noted otherwise, trademarks and service marks herein are the property of Weatherford. Specifications are subject to change without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in the applicable contract between Weatherford and the client.

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