TenarisBlue® Near Flush

APPLICATION ESTABLISHED TECHNOLOGY NEW TECHNOLOGY

Threaded & Coupled for the Majority

of Carbon Steel Applications

Threaded & Coupled Especially Suitable for CRA

High Torque and Compression Loads

for Rotating Liners and Drilling-with-Casing

Thermal Well Solutions – Steam Injection Wells

Thermal Well Solutions – Slotted Pipe SAGD Operations

Integral Semi-Flush for Slim Wells and Tight Clearances

Heavy Wall Casing

Integral Flush for Maximum Clearance

Tubing for Workstring Applications

Large OD, Fast and Easy Make-up Casing

Tenaris MSTM

Atlas Bradford® TC-IITM *

Tenaris MS28TM **

Tenaris 3SBTM **

Tenaris MS XT/XCTM

Tenaris MS28 XT/XCTM

Atlas Bradford® Advanced NJO®

Tenaris HWTM

Atlas Bradford® ST-LTM

Atlas Bradford® HD-L®

Tenaris PJDTM

Atlas Bradford® RTS®

Tenaris ERTM

TenarisBlue®

TenarisBlue® Dopeless™

TenarisBlue®

TenarisBlue® SAGD

TenarisBlue® Near Flush

* Also suitable as threaded & coupled for CRA.** Also suitable as threaded & coupled for the majority of carbon steel applications.

TenarisBlue® technology features a dope-free option for enhanced environmental protection and operational efficiency.

Note: TenarisBlue® is a Tenaris trademark registered in the European Community and in Norway.

TenarisBlue® Near Flush is a semi-flush premium con-nection designed by Tenaristo meet the needs of operating in today’s moredemanding environments. It offers best-in-class perfor-mance and the operationaland environmental benefitsof our renowned Dopeless™technology. The TenarisBlue®

Near Flush casing connectiondesign optimizes geometryand performance, providingexcellent tension capacity,greater compression effi-ciency and maximum seala-bility for slim wells, highpressure/high temperaturewells, and in wells wheretight clearances arerequired.

TenarisBlue® Near Flush sets a new standard for integralsemi-flush premium connec-tion technology, with a compression efficiency inexcess of 50% of pipe body,outstanding structuralintegrity and maximum seal-ing capacity. All have beenfully designed to withstandthe requirements of ISO13679 CAL IV.

TenarisBlue® Near Flush

Integral semi-flush design offering best-in-classmechanical performance and gas sealability, for wellsrequiring tight annular clearances.

• Dopeless™ option for simplified operations and enhanced environmental protection.

Thread Taper:• 5.00 % (wt lower than 11 mm)• 6.25 % (wt between 11 mm

and 13.5 mm)• 8.50 % (wt higher than

13.5 mm)

Thread Pitch:• 4 TPI (wt higher than 11 mm)• 5 TPI (wt lower than 11 mm)

Stabbing Flank Angle:• 20º for all OD

Load Flank Angle:• -10º for all OD

Features• Superior compression

efficiency, over 50%. • High tension efficiency up

to 78%.• Excellent structural integrity.

TenarisBlue®

Near Flush

• Maximum sealability. • Optimized clearance OD.• Superior overtorque capacity.• Available in 5" to 13 5/8"

OD Casing.

Best-in-class PerformanceThe TenarisBlue® Near Flush connection is especially suited forwells requiring tight clearances and slim or lean well profiles,where greater performance under extreme combined loadingconditions is required. Its robust design offers the optimumbalance between performance and geometry, and its fast andeasy make-up helps to reduce risk of cross threading andoverall trouble time during running operations.

• Ease of Annular Clearance:

near flush design allowsmaximum clearance in thecritical annular areabetween casing strings(clearance OD is less than3% of pipe body).

• Optimum sealability:

the dual seal design providesexcellent sealability under combined loading conditions.

Internal pressure

Tension

External

pressurePipe body Service envelope

Connection service envelope

Connection critical section

service envelope

Compression

• High compression capacity:

compression efficiency is over50% of pipe body under ISO13679 CAL IV testingconditions.

• Fast and safe make-up:

the easy stabbing and low galling characteristics ofthe thread design assure fast, reliable and consistent make-up.

• Proprietary Dopeless™

technology:

the unique TenarisBlue®

technology design allows for a dry dope-free installation, simplifying rig operations and enhancing environmentalprotection.

Design Features

development, use andevaluation of our wide rangeof proprietary premiumconnections. They utilize anintegrated network ofspecialized laboratories, eachfully equipped with state-of-the-art facilities to performFinite Element Analysis (FEA)and Full Scale Testing (FST)of OCTG connections, underthe most demanding loadingconditions.

1.000

0.835

0.698

0.583

0.487

0.407

0.346

0.284

RELATIVE STRESSS/Sy

Tenaris has developed a best-in-class performance semi-flush casing connection,which will enlarge theoperators’ design options tocope with the increasinglycomplex demands of today’sadvanced drilling practices.

Tenaris’s design team shares a detailed knowledge ofpremium connectiontechnology resulting from the

• Optimized hooked thread profile for excellent tensile and compression performance.

• Thread profile: Negative load flank: -10°Stabbing flank: 20°

Optimized External Seal: • Sphere to cone design

for excellent sealability.

• Turned OD for maximum annular clearance.

Enhanced Internal Seal: • Internal sphere to cone seal.• Swaged and turned ID

for standard and special drift.

• Large torque shoulder for excellent compression efficiency (over 50%) and superior overtorque capacity.

• Specially designed dope system for controlling dope pressure when used with traditional thread compounds.

Dope pressure control system to allow the use of traditional threadcompounds.

Large shoulder formaximum compressionefficiency andovertorque capacity.

Hooked thread profile for superior tensile performance.

Internal metal to metal seal for extreme internalpressure conditions.

External metal to metalseal for high externalpressure conditions forhigh external pressure.

Maximum Structural Integrity

Advanced Seal Design Excellent ThreadGeometry

Repair Shops and Field Services

As part of our commitmentto offering the highest stand-ards of support for our cus-tomers we have a worldwidenetwork of more than 130licensed repair and threadingshops to thread tubular endsand accessories locally.These workshops are prop-erly qualified for the thread-ing of TenarisConnectionsand are monitored for quali-ty on a continuous basisbeing subject to regularaudits. Tenaris also ensuresthat their personnel are ade-quately trained and under-stand the particular featuresof its various products.

Each of these licensedthreading and repair shopshas online access to all thelatest technical drawings andspecifications for the con-nections they are licensed tothread and repair.By providing online accessto technical documentationwith comprehensive instruc-tions and procedures,

Tenaris ensures that itslicensees have all the infor-mation necessary to providethe most effective service toits customers.

In addition to its globallicensee network, Tenarishas an experienced team offield engineers always readyto assist our customersworld-wide in the handlingand running of our premiumconnections, recommenda-

tions for make-up and run-ning procedures and com-prehensive running services.Since premium connectionsare high-value productswhich require very carefulhandling, our field specialistscan help to ensure that ourcustomers obtain propervalue for their investment inour products.

Tenaris Connections B.V. has produced this brochure for general information only. TenarisConnections does not assume any responsibility orliability for any loss, damage, injury resulting from the use of information and data herein. Warranties, indemnities and any other obligationswill result only from the respective contracts of license or sale, as the case may be. Please contact a TenarisConnections representative formore complete information, and for information on other Atlas Bradford and Tenaris Premium Connections not shown here which are alsoavailable upon request. TenarisBlue is a registered trademark of Tenaris Connections A.G. Antares is a registered trademark of Dalmine S.p.A. Atlas Bradford, ST-L, HD-L, NJO, Advanced NJO, TC-II, and RTS, are trademarks of Grant Prideco, L.P. Tenaris ER, Tenaris MS, Tenaris MS XT/XC, Tenaris MS28, Tenaris MS28 XT/XC, Tenaris PJD, Tenaris 3SB and Tenaris HW are trademarks ofTenaris Connections A.G. © Tenaris 2007. All rights reserved.

For our latest list of licensedrepair shops, please visitwww.tenarisconnections.com

ARGENTINABuenos AiresLucas Pigliacampolpigliacampo@tenaris.com(54) 3489 435285 tel(54) 3489 433802 faxBOLIVIASanta Cruz de la SierraRichard Mariacarmariaca@tenaris.com(591) 3 312 0603 tel(591) 3 312 0602 faxBRAZILSão PauloJosé Rey Mendezjreymendez@confab.com.br(55) 12 244 9001 tel(55) 12 244 9004 faxCANADACalgaryBlair Mackiebmackie@tenaris.com(1) 403 262 6804 tel(1) 403 290 0619 faxCASPIAN SEAAktauDerek Smithdsmith@tenaris.com(7) 3292 427054 tel(7) 3292 427054 faxCHINABeijingMatías Orozcomorozco@tenaris.com(86) 10 6437 6744 tel(86) 10 6437 6746 fax

COLOMBIABogotaSergio Chamorroschamorro@tenaris.com(57) 1 636 2920 tel(57) 1 623 4780 faxECUADORQuitoMarcelo Gonzalez Pondalmgonzalezpondal@tenaris.com(593) 2 298 6240 tel(593) 2 298 6250 faxEGYPTCairoEmad Hannaehanna@tenaris.com(20) 2 2686 991 tel(20) 2 2686 990 faxITALYBergamoGiuseppe Della Pinagdellapina@tenaris.com(39) 035 560 3960 tel(39) 035 560 3464 faxJAPANKantoHisao Nakamurahnakamura@nkktubes.co.jp(81) 44 328 3400 tel(81) 44 328 3456 faxMEXICO VeracruzLuis Conde lconde@tamsa.com.mx(52) 229 989 1228 tel(52) 229 989 1119 fax

NIGERIAPort HarcourtJorge Mayerjmayer@tenaris.com(234) 8461 0299 tel(234) 8461 1859 faxNORWAYStavangerTomás Castineirastcastineiras@tenaris.com(47) 51 44 3440 tel(47) 51 44 3441 faxRUSSIAMoscowAlex Kondrashovakondrashov@tenaris.com(7) 095 502 1630 tel(7) 095 937 6781 faxSINGAPORESingaporeBabu Raghavendrenbraghavendren@tenaris.com(65) 6395 9000 tel(65) 6222 4090 faxUAEDubaiMario Vespamvespa@tenaris.com(971) 4 2725 394 tel(971) 4 2725 392 faxUKAberdeenJohn Menniejmennie@tenaris.com(44) 1224 587 889 tel(44) 1224 587 422 fax

USAHoustonLeon Starneslstarnes@tenaris.com(1) 713 767 4400 tel(1) 713 767 4444 faxVENEZUELABarcelonaRandall Rodríguezrrodriguez@tenaris.com(58) 212 600 3775 tel(58) 281 276 4211 fax

Product Qualification & Technical SupportLeon Starnestechnical@oilfield.tenaris.com(1) 713 767 4400 tel(1) 713 767 4444 fax

Licensee Supportlicensees@oilfield.tenaris.com(54) 3489 433505 tel(54) 3489 435131 tel

Version 04 / March 2007 Tenaris Marketing Communications

©Tenaris. All rights reserved info@tenaris.com

www.tenarisconnections.com