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Multilaterals

Applications

Features, Advantages and Benefits

Weatherford's SRS 1.1 selective re-entry system creates Level 1 junctions with full lineraccess to the lateral wellbore in new and existing open-hole environments. It allows fornumerous, closely-spaced sidetracks from the parent well. It also enables re-entry ofany lateral while maintaining access to the parent bore through a large-diameter packer.

The SRS 1.1 system is based on proven Weatherford technology that incorporates amultilateral orienting latch assembly, which is used for both milling and production, andan orientation riser (O-Riser). The O-Riser, attached above an ACP™ annulus casingpacker, acts as a permanent downhole anchor and seal bore with a known azimuthreference. The orienting latch allows for a repeatable-releasable whipstock connectionin a consistent orientation during the drilling or re-entry phase.

The dual-use orienting latch assembly, which is used in bothmilling and production, allows numerous sidetracks to bedrilled from the parent well. These closely-spaced lateralsprovide access to additional reserves with a smaller footprint, optimizing productionwhile reducing drilling costs and minimizing the impact on the environment.

The SRS 1.1 system allows for both open-hole and slotted liner completions. This

gives the operator the opportunity to meet the requirements of the application in themost economic manner.

A large ID packer provides access to the lower zone in the parent bore and the SRS system can be used for remedial work in any lateral wellbore. These re-entrycapabilities allow the operator to make improvements that extend the life of thewellbore and quickly restore maximum productivity.

The SRS 1.1 system is appropriate for Level 1 junctions in open-hole environments,either in new development drilling or re-entries. Based on proven technologies thatreduce trips and save rig time, it is ideal for building simple, low-cost and low-risk

junctions in consolidated formations.

The system is particularly suitable for wells in mature fields where production ratesare declining, because it allows economical, closely-spaced laterals to accessadditional reserves while maintaining production from the original wellbore.

TM

SRS 1.1–Level 1 Multilateral

© 2004–2007 Weatherford. All rights reserved. 4495.00

Weatherford International Ltd.515 Post Oak Blvd., Suite 600Houston, Texas 77027 USATel: 713-693-4000www.weatherford.com

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Multilaterals

Weatherford products and services are subject to the Company’s standard terms and conditions, available onrequest 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. Specificationsare subject to change without notice. Weatherford sells its products and services in accordance with the termsand conditions set forth in the applicable contract between Weatherford and the client.

System size, openhole (in., mm )6

152.4 8-1/2

215.9

Hydraulic running tool maximum releaseachievable (PSI, kPa )

5,87240,482

6,24043,019

Maximum OD (in., mm ), O-riser 5.812147.6

8.125206.4

Minimum ID (in, mm ), O-riser/ ACP assembly3.95

100.36.25

158.8

Maximum temperature (°F, °C )275135

275135

Burst (PSI, kPa )2,500

17,235

4,000

27,576

Collapse (PSI, kPa)7,500

51,705 4,000

27,576

Whipstock angle 2° or 3° 2° or 3°Orientation accuracy 2.5° 2°

Stab-in force (lb, daN ), latch into O-riser 5,000 to 10,0002,224 to 4,448

5,000 to 10,0002,224 to 4,448

Release force (lb, daN ), latch from O-riser 30,000 to 40,00013,345 to 17,793

40,000 to 50,00017,793 to 22,241

Torque rating (ft-lb, N•m ), milling latch/O-riser10,00013,558

10,00013,558

Shear value (lb, daN ), starter mill from whipstock24,00010,676

24,00010,676

Minimum ID (in., mm )2.5

63.5 2.2557.2

Maximum OD (in., mm )4.72

119.96.5

165.1

Face angle 6° 6°

Running tool OD (in., mm ), J-slot release5.75

146.18.12

206.2

Production latch ID (in., mm )3.95

100.36.07

154.2

O-Riser/Annulus Casing Packer ( ACP )

Starter Mill/Whipstock/Milling Latch

Re-Entry Guide (Optional)

Specifications

TM

SRS 1.1–Level 1 Multilateral

The ACP™ system's hydraulic-release running tool features a mechanical back-up safety disconnect,ensuring reliable operations downhole.

The original O-Riser orientation is used to adjust the latch assembly for re-entry into the desired lateral.No gyro trips are necessary in the re-entry phase.

Features, Advantages and Benefits (continued)

© 2004–2007 Weatherford. All rights reserved. 4495.00

Weatherford International Ltd.515 Post Oak Blvd., Suite 600Houston, Texas 77027 USATel: 713-693-4000www.weatherford.com