PRODUCT a sucker rod string working mainly under torque stresses, ... this product capable of...
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HolloRodTM Series for Progressive Cavity Pumping
Tenaris is a leading supplier of tubes andrelated services for the worlds 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.
Rio de Janeiro
GuadalajaraDos Bocas Maharashtra
Rio das Ostras
Ho Chi Minh
Pittsburgh Oklahoma City
Sucker Rods Production Centers
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.
Tenariss 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.
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.
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.
Conventional sucker rods elevators are usedwith a 1 x 2 feet pony rod and a crossover toadjust the HolloRodTM Series end when elevating.
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.
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
HolloRodTM1000 1100 1150 1200
HolloRodTM1500 1500 1550 1600
HolloRodTM2500 2500 2550 2600
Metric weight withoutnipple
Max. workingtorque *
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.
PRODUCT Joint min. int.
Enhanced operational reliability for PCP applications.
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
Tenariss HolloRodTM Series increases the reliability of progressive cavitypumping (PCP) operations and offers several benefits at the rig.
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.