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HolloRodTM Series for Progressive Cavity Pumping

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Tenaris

Tenaris is a leading supplier of tubes andrelated services for the world’s energy industryand certain other industrial applications. Ourmission is to deliver value to our customersthrough product development, manufacturingexcellence, and supply chain management. We seek to minimize risk for our customersand help them reduce costs, increase flexibilityand improve time-to-market.

Tenaris employees around the world arecommitted to continuous improvement bysharing knowledge across a single globalorganization.

Through our integrated global network ofmanufacturing, R&D and service facilities, wework with our customers to meet their needs forthe timely supply of high performance productsin increasingly complex operating environments.

Coseley

CopenhagenEsbjerg

Nisku

Poza Rica

Monterrey

Barrancabermeja

LimaCallao

Villa Mercedes

SantiagoMontevideo

Rio de Janeiro

Louisville

AlgomaTubes

Cedar Springs

Counce

Westwego

Tamsa

TuboCaribe

Siderca

Siat

Aberdeen

Bakersfield HickmanConroe

Prudential

Kuala Lumpur

Perth

Mexico CityComalcaco

GuadalajaraDos Bocas Maharashtra

NKKTubes

WarriOnne

Lagos

DalmineSilcotub

Campina

BucharestPloiesti

BasraMisurata

Batam Balikpapan

Moresby

Darwin

Broome

SPIJ

Dammam

Doha

Rio das Ostras

LubaMalabo

Maputo

New Delhi

Mumbai

Ho Chi Minh

Atyrau

Ashgabat

Aksai

Luanda

Confab

Jakarta

Villavicencio

Pittsburgh Oklahoma City

Manufacturing Centers

R&D Centers

Service Centers

Commercial Offices

Sucker Rods Production Centers

Red Deer

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In PCP systems, a rotating screw-type pump is used and the rotating movement is thentransmitted from the surface to the pumpthrough a sucker rod string working mainlyunder torque stresses, causing the fluidcontained in the cavity to flow upwards.

Tenaris’s Research & Development teamdeveloped the HolloRodTM Series hollow suckerrods, a technological breakthrough that notonly increases the reliability of progressivecavity pumping (PCP) operations, but alsoreduces operating costs.

One of the alternatives that the hollow rodpresents is the ability to inject fluids throughthe hollow rod for heavy and extra-heavy crudeoil pumping or any other special application.This improves injection efficiency and reducesthe complexity of the operation given theelimination of injection pipes and capillaries.

HolloRodTM Series forProgressive Cavity Pumping

HOLLOW SUCKER RODS

HolloRodTM 1000, HolloRodTM

1500 and HolloRodTM 2500.

Tenaris has developed the HolloRodTM Series hollow sucker rods, a line of products specially designed for progressive cavity pumping(PCP) applications in the most demanding environments.

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Main features

The seamless pipes used to manufacture theHolloRodTM Series products combine a low-alloyChromium-Molibdenum steel with a quenched andtempered heat treatment resulting in a refinedmicroestructure with excellent mechanicalproperties: Yielding Streess 140 Ksi minimum andUltimate tensile stress 147 Ksi minimum.

These rods have been developed to work underrotating loads in PCP. This product includes apipe with box-box ends and a nipple connectorthat allows an external flush joint (with novariation of the diameter in the joint area),which minimizes turbulence and flow losses.

The flush connection significantly reducesfriction between the tubing and the rod string.Therefore, premature wear failures areeliminated.

The range of products with HolloRodTM

includes three models of connections to workwith torques up to 1,000; 1,500 and 2,500 lb.ft.

OTHER CHARACTERISTICS

• HolloRodTM tapered thread with 8 hpptrapezoidal thread profile and differentiatedtapering between pin and box.

• Joint with torque shoulder. • Diluents, corrosion inhibitors or other fluids

can be added through a hollow joint. • Temperature and pressure sensors can be

lowered down the string.

HANDLING AND INSTALLATION

For handling and transportation of HolloRodTM

Series, the same specifications for conventionalsucker rods must be followed. Installation thewell site is simple, as no special accessories areneeded.

Elevators

Conventional sucker rods elevators are usedwith a 1” x 2 feet pony rod and a crossover toadjust the HolloRodTM Series end when elevating.

Power Tong

The use of standard hydraulic pipe tongs withadapted clamps for an outer diameter of 1.66” or 1.9” is recommended. No special tools arerequired. For better performance, an electronictorque control device is suggested.

Hanging Slips

Pneumatic slips are used for conventional pipesadapted to outer diameters of 1.66” or 1.9”.

Make-up Torque for Hollow Rods

PRODUCT Min. torque ft.lb

Opt. torqueft.lb

Max. torqueft.lb

HolloRodTM1000 1100 1150 1200

HolloRodTM1500 1500 1550 1600

HolloRodTM2500 2500 2550 2600

Metric weight withoutnipple

Max. workingtorque *

Upset outerØ

Pipe thickness

Pipe outerØ

HolloRodTM 1000 48.8 mm - 1.9" 6.7 mm - 0.26" Non upset 1,000 ft.lb 6.95 kg/m - 4.6 Lb/ft 8.5 to 9.75 m - 28 to 32 ft 20 mm - 0.79"

HolloRodTM 1500 48.8 mm - 1.9" 6.7 mm - 0.26" Non upset 1,500 ft.lb 6.95 kg/m - 4.6 Lb/ft 8.5 to 9.75 m - 28 to 32 ft 18 mm - 0.71"

HolloRodTM 2500 48.8 mm - 1.9" 6.7 mm - 0.26" 60 mm - 2.36" 2,500 ft.lb 6.95 kg/m - 4.6 Lb/ft 8.5 to 9.75 m - 28 to 32 ft 20 mm - 0.79"

*Tenaris recommends using a 0.9 safety factor to maximize fatigue resistance.

Technical Specifications

Length range

PRODUCT Joint min. int. Ø

Enhanced operational reliability for PCP applications.

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Advantages of HolloRodTM Series

• Reduces premature failures due to rod pinbreakage caused by over torque during welloperations, given its make-up procedure andconnection design for torque applications.

• Reduces tubing wear failures due to the designof its flush and near flush joints.

• Reduces the backspin effect and enhancestorque transmission (stick-slip effect).

• Increases the safety of rig personnel since itreduces accumulated turns in the string andtherefore the possibility of backspin effectsduring workover operations.

• Increases the effectiveness of corrosioninhibition or any other diluents action whilebeing injected through the hollow rod.

• Reduces handling problems, as its installationdoes not require special tools.

Building upon its vast field experience in handling sucker rods, Tenaris offers acomprehensive range of services to meet its customers’ operational needs.

Experienced field engineers are on hand to assess our customers’ operations in thefield in order to improve all aspects related to the sucker rod string. Also, technicalassistance is provided for well completion.

Tenaris offers a wide range of high quality products to complete the rod string andincrease its life and performance:

• Pup joints (pony rods) to adjust string length.• Combination crossover between API

conventional thread and HolloRodTM thread.• Polished and chromium-plated hollow rods.• Rotating joints (swivels) for diluent injection.• Slotted pup joints that allows fluid injection

into the tubing at any depth.• Safety-check valves.

INCREASED RELIABILITY FOR PROGRESSIVE CAVITY PUMPING OPERATIONS

TECHNICAL SERVICE ACCESSORIES

Tenaris’s HolloRodTM Series increases the reliability of progressive cavitypumping (PCP) operations and offers several benefits at the rig.

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Well configurations withHolloRodTM SeriesA trustworthy technology that offers versatility to our customers'operations.

OIL PRODUCTION THROUGH THE TUBING /

HOLLOW ROD ANNULUS

HolloRodTM Series rods make operations morereliable and safer. Thanks to their unique design,rods can withstand higher torque loads. Beingmore rigid than conventional products, hollowrods accumulate less energy in the string andsignificantly reduce probability of backspineffects, enhancing safety at the rig.

OIL PRODUCTION THROUGH BOTH THE TUBING /

HOLLOW ROD ANNULUS AND THE ROD STRING INTERIOR

This configuration increases production flowarea. It is mainly recommended with HolloRodTM 1000 and HolloRodTM 1500 rodsinstalled in 2 7/8” (73 mm) tubing, and shouldnot be used for viscous oil pumping.

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OIL PRODUCTION THROUGH THE TUBING / HOLLOW

ROD ANNULUS AND INJECTION OF FLUIDS THROUGH

THE ROD STRING INTERIOR

One of the alternatives that HolloRodTM

technology enables is the injection of fluids into the rod string. This improves injectionefficiency, since fluids come into direct contactwith the flowing oil – making injection pipesand capillaries unnecessary.

FLUID INJECTION IN BATCHES THROUGH THE

HOLLOW ROD

This is a modification of the previous optionthat allows the injection of fluids through thehollow rod string in batches. When the injectionprogram is not being used, produced oil can belifted through both the hollow rod string and theannular space between the tubing and the rodstring, increasing flow area.

Tenaris has produced this catalogue for general information only. While every effort has been made to ensure the accuracy of the information contained within this publication, Tenaris doesnot assume any responsibility or liability for any loss, damage, injury resulting from the use of information and data herein. Tenaris products and services are only subject to the Company’sstandard Terms and Conditions or otherwise to the terms resulting from the respective contracts of sale, services or license, as the case may be. The information in this publication is subject to change or modification without notice. For more complete information please contact a Tenaris’s representative or visit our website at www.tenaris.com. This catalogue supersedesVersion 10 / February 2012. HolloRod™ Series for Progressive Cavity Pumping. Version 11 / April 2012. ©Tenaris 2012. All rights reserved.

For further information please contact:sucker.rods@tenaris.com

www.tenaris.com/suckerrods

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BlueRodTM Premium Sucker Rod

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Tenaris presents its latest development, the BlueRodTM premium sucker rods with a remarkablyresistant connection designed for high loads. The connection improves the rod’s fatigue life andprovides an excellent performance in the field.

The total capacity of the sucker rod string depends entirely on the connection capacity. Up to now, a third of conventional pumping failures were traceable to this part of the suckerrod. The new BlueRodTM offers 100% connection efficiency and opens up a new future for oilpumping operations.

BlueRodTM

Premium Sucker RodTenaris’s BlueRodTM premium sucker rods open up a new future for oil pumping operations as they provide an excellent performancein the field.

Flank-to-flank contact.Reduces the thread’s tendencyto loosen.

Stress reduction.Higher fatigue life.

Reduction of thread deformation.

Diametrical interference.Increases the working capacity by decreasing the necessary pre-tension in the pin make-up.

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Pumping at maximumperformanceConventional connections’ design limitations drove Tenaris to developthis product capable of increasing the life and efficiency of sucker rods.

Improved Stress DistributionStress distribution diagram at 100% Goodman

Reduction of the Tendency Toward Loosening

Plastic Deformations ReductionPlastic Deformationsat 100% Goodman

Plastic Strain (%)

11

67432717110.710.45

Relative principalstresses Tpi/Ty

(Ty = 59,77 kg/mm2)

1.125

0.9000.6750.4500.2250.000-0.225-0.450

Gap

API Design Tenaris BlueRodTM Design

API Design Tenaris BlueRodTM Design

API Design Tenaris BlueRodTM Design

• Dramatically reduces the number of workoveroperations caused by sucker rod connection failures.

• Expands the traditional working capacity of the rod pumping system to operations that are normally restricted to ESPs.

• Improves performance in high load operations.• Reduces the stress level, together with the energy

consumption, in the pump jack by using a lighter rodstring composed of smaller sucker rods.

• Flank-to-flank contact that eliminates the gap existing in the conventional profile thread, thus reducing thetendency to loosen.

• Cut-tapered trapezium profile thread with diametricalinterference that reduces the pre-tension in the pinmake-up.

• Lower displacement during make-up and uniform contactbetween the flanks, allowing a better stress distributionand a reduction in the permanent deformations createdin threads during both make-up and operation.

BENEFITS FEATURES

API BlueRodTM

MULTIAXIAL STRESS FATIGUE ANALYSIS

The Sines method was employed to evaluatefatigue behaviour. The Sines coefficient predictsa better fatigue behaviour the higher its value.The charts show that the new BueRodTM

exhibits higher and more uniform values thanthe conventional one.

NEW MODIFIED GOODMAN DIAGRAM

Given the results obtained through FiniteElement Analysis (FEA), lab tests and fieldtrials, a new Goodman diagram showing ahigher working capacity for the BlueRodTM

was generated.

API Design Tenaris BlueRodTM Design

Zone A

Zone B

Zone C

Zone D

Zone E

Zone A

Zone B

Zone C

Zone D

Zone E

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100

90

80

70

60

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40

30

20

0

10

10 20 30 40 50 60 70 80 10090

NEW MODIFIED GOODMAN DIAGRAM

Smax

(K

si)

Smin (Ksi)0

D High Resistance

Smin BlueRodTM Premium Sucker Rod

BLUERODTM DESIGN

Zone B Zone CZone A

Zone D Zone E

0.10 0.20 0.30 0.40

Sine

s Fa

tigu

e Co

effi

cien

t, D

Distance from the Edge (mm)

5.0

10.0

15.0

0.0

-5.0

-10.0

-15.0

-20.0

0.00-25.0

-550.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

-45

-35

-25

-15

-5

5

15

API DESIGN

Distance from the Edge (mm)

Sin

es F

atig

ue

Co

effi

cien

t, D

Zone B Zone CZone A

Zone D Zone E

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LABORATORY TESTING

Laboratory tests were performed to evaluate and compare the maximum resistance ofBlueRodTM and API connections. To this end, it was necessary to increase the rod bodydiameters of the samples and to isolate theeffects on them.

The connections’ stress level was evaluatedfollowing the Modified Goodman Diagrammethod, as recommended by API Specs. Results showed that:• Grade D BlueRodTM reached infinite fatigue

life (10 million cycles) working up to 336% onthe Goodman Diagram.

• The conventional connection could notsurpass half these cycles at lower stress levels.

OPTIMUM PERFORMANCE VERIFIED ON SITE

When the sucker rod string reaches 10 millioncycles, it is considered to have infinite fatiguelife. This number of cycles has been reached inan operating well in which high-strengthsucker rods were replaced by 7/8” Grade DBlueRodTM.

The chart shows 7/8” Grade D BlueRodTM

working under similar stress conditions tothose of 1” high-strength rods with conventionalconnections. In this scenario, the new TenarisBlueRodTM has enabled a higher Grade Defficiency to be achieved in the field.

Increased rod stringworking capacityThe BlueRodTM premium sucker rods improve the rod’s fatigue life andprovide an excellent performance in the field, maximizing the resultsof rod pumping system applications.

120

110

100

90

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70

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50

40

30

20

10

SallowableGrade D (Ksi)

SallowableGrade UHS-NR (Ksi)

MIN YS Grade D (Ksi)

Sallowable BlueRodTM (Ksi) Smin (Ksi)

00

10 20 30 40 50 60 70 80 90 100 110

7/8" Grade D BR 3/4" Grade D BR1" Grade D BR

GOODMAN DIAGRAM FOR GRADES D AND HIGH STRENGTH

Smax

(K

si)

Smin (Ksi)BR: BlueRodTM

00

10 20 30 40 50 60 70

100

90

80

70

60

50

40

30

20

10

80 90

7/8" Grade D BR 1" High Strength Rods

GOODMAN DIAGRAM FOR GRADES D AND HIGH STRENGTH

Smax

(K

si)

Smin (Ksi)

137% (0.9 SF)

83% (0.9 SF)

BR: BlueRodTM

SallowableGrade D (Ksi)

SallowableGrade UHS-NR (Ksi)

MIN YS Grade D (Ksi)

Sallowable BlueRodTM (Ksi) Smin (Ksi)

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IMPROVED PERFORMANCE

The ability of BlueRod™ technology to increasestring capacity is fundamentally driven by theadoption of new design technologies, supportedby results obtained from:

• Thread design through Finite Element Analysis.• Full scale laboratory tests.• Customer field trials.• Laboratory failure analysis.

HANDLING AND OPERATIONS

No special tools are necessary for handling and make-up operations when using TenarisBlueRodTM. Conventional power sucker rodtongs can be used with this new product.

ACCESSORIES

As part of its integrated manufacturing process,Tenaris produces all accessories needed forthe setting up of BlueRodTM premium sucker rods,including reductions, cross-overs, pony rods andcouplings.

Tenaris uses state-of-the-art numerical controllathes and control gauges in order to ensurethe highest quality in its connections.

Strict measurement equipment permanentlymonitors compliance with the design variablesof the thread in order to ensure the uniformityand reliability of the product.

MANUFACTURING & QUALITY CONTROL

General Dimensions

Material Specifications

DIAMETER LENGTH THREAD PITCH WRENCH SQUARE(INCHES) (FEET) (TPI)

3/4" 25 OR 30 10 API

7/8" 25 OR 30 6 REINFORCED

1" 25 OR 30 6 API

ROD GRADE YS (KSI) UTS (KSI) COUPLING

KD BLUEROD™ 85 MIN 115 - 140 UHS 8630M

D BLUEROD™ 100MIN 125 - 140 UHS 8630M

Tenaris has produced this catalogue for general information only. While every effort has been made to ensure the accuracy of the information contained within this publication, Tenaris doesnot assume any responsibility or liability for any loss, damage, injury resulting from the use of information and data herein. Tenaris products and services are only subject to the Company’sstandard Terms and Conditions or otherwise to the terms resulting from the respective contracts of sale, services or license, as the case may be. The information in this publication is subject to change or modification without notice. For more complete information please contact a Tenaris’s representative or visit our website at www.tenaris.com. This catalogue supersedesVersion 05 / February 2012. BlueRod™ Premium Sucker Rod. Version 06 / April 2012. ©Tenaris 2012. All rights reserved.

For further information please contact:sucker.rods@tenaris.com

www.tenaris.com/suckerrods