Qualification of UOE SAWL Linepipes With Enhanced Collapse Resistance for Ultra Deepwater Applications

2013 ◽  
Author(s):  
Fábio Arroyo ◽  
Rafael F. Solano ◽  
Luciano Mantovano ◽  
Fábio B. de Azevedo ◽  
Hélio Alves ◽  
...  
Keyword(s):  
New Technology ◽  
Large Diameter ◽  
Final Analysis ◽  
Load Testing ◽  
Offshore Pipelines ◽  
Cold Forming ◽  
Collapse Resistance ◽  
Offshore Pipeline ◽  
Key Factor ◽  
Combine Load

Large diameter UOE pipes are being increasingly used for the construction of offshore pipelines. Since oil discoveries are moving towards ultra-deepwater areas, such as Pre-Salt in Brazil, collapse resistance is a key factor in the design of the pipelines. It is known that the cold forming, and the final expansion in the UOE linepipe manufacturing process, reduces the elastic limit of the steel in subsequent compression. Due to this, the DNV collapse formula includes a fabrication factor that derates by a 15% the yield strength of UOE Pipes. However, DNV also recognizes the effect of thermal treatments and the code allows for improvement of the fabrication factor when heat treatment or external cold sizing (compression) is applied, if documented. This paper presents the qualification of UOE pipes with enhanced collapse capacity focusing the use of a fabrication factor (αfab) equal to 1. TenarisConfab has performed a technology qualification process according to DNV-RP-A203 standard “Qualification Procedures for New Technology”. The main aspects of the qualification process are presented in this paper which included significant material and full scale testing, including combine load testing, and final analysis. The qualification process achieved successful results and this will allow use of a fabrication factor equal to 1 directly in deepwater and ultra-deepwater offshore pipeline projects with a possible reduction in material and offshore installation costs and also potentially enhancing the feasibility of many challenging offshore projects.

Collapse Resistance Enhancement in UOE SAWL Line Pipes During Coating Heat Treatment for Ultra Deepwater Applications

2014 ◽  
Author(s):  
Fábio Arroyo ◽  
Harold R. León ◽  
Ronaldo Silva ◽  
Luciano Mantovano ◽  
Rafael F. Solano ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Large Diameter ◽  
Final Analysis ◽  
Material Strength ◽  
Line Pipe ◽  
Offshore Pipelines ◽  
Cold Forming ◽  
Collapse Resistance ◽  
Offshore Pipeline ◽  
Key Factor

Large diameter UOE pipes are being increasingly used for the construction of offshore pipelines and in the last few year, since oil discoveries are moving towards ultra-deepwater areas, such as Pre-Salt in Brazil, collapse resistance is a key factor in the design of the pipelines the demand for pipes with high thickness near the limits for fabrication and installation capacity. It is known that the cold forming, and the final expansion in the UOE line pipe manufacturing process, reduces the elastic limit of the steel in subsequent compression. Due to this, the DNV collapse formula includes a fabrication factor that de-rates by a 15% the yield strength of UOE Pipes. However, DNV also recognizes the effect of thermal treatments and the code allows for improvement of the fabrication factor when heat treatment or external cold sizing (compression) is applied, if documented. In previous work [1] it was presented the qualification of UOE pipes with enhanced collapse capacity focusing the use of a fabrication factor (alpha-fab) equal to 1. A technology qualification process according to international standard has been performed. The main aspects of the qualification process were presented and included significant material, full scale testing and final analysis. In this paper, we compare those results with the ones of the new qualification tests analyzing the more important variables affecting the collapse resistance such as ovality, compressive material strength, thermal treatment control, etc. This new qualification obtained even better results than the previous one, which will allow the use of a fabrication factor equal to 1 directly in deepwater and ultra-deepwater offshore pipeline projects with a possible reduction in material and offshore installation costs and also potentially enhancing the feasibility of many challenging offshore projects.

Enhanced Collapse Resistance for Different D/t Ratios of UOE Pipes for Ultra Deepwater Application

2015 ◽  
Author(s):  
Rodrigo De Lucca ◽  
Rafael F. Solano ◽  
Doug Swanek ◽  
Fabio B. de Azevedo ◽  
Fábio Arroyo ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Cold Work ◽  
Large Diameter ◽  
Forming Process ◽  
Collapse Pressure ◽  
Processing Strategies ◽  
Collapse Resistance ◽  
Offshore Pipeline ◽  
Key Factor ◽  
Water Depths

Energy consumption outlook shows that the demand for Oil and Gas is increasing worldwide and since most of the undemanding reserves are already being explored, new reserves means longer distances from the shore and increasing water depths, of up to 3,000 meters. Collapse resistance has become a key factor in the design of pipelines for ultra-deepwater applications. UOE process is commonly used for manufacturing pipelines of large diameter and the cold work involved in this forming process modifies the mechanical properties of the pipes. This paper presents the effect of thermal treatment on final material properties, proving the validity of enhancing collapse for different D/t, as allowed by DNV-OS-F101 αFab, and extending what has been shown as valid on previous studies. In this work, the inputs for the processing strategies are presented, along with coupon compression testing and full scale testing, in order to qualify the selected route as compliant with producing pipes with αFab equal to 1, for usual D/t combinations. An analysis of the predicted collapse pressure compared to the real collapse pressure of the pipes is also presented. The extension of the qualification process achieved successful results and allows the use of a fabrication factor equal to 1 in ultra-deepwater offshore pipeline projects. This enables the reduction of wall thickness, generating reductions in material and offshore installation costs and also potentially enhancing the feasibility of many challenging offshore projects.

Offshore Pipeline Installation: 3-Dimensional Finite Element Modelling

2011 ◽  
Author(s):  
Lorenzo Marchionni ◽  
Lombardi Alessandro ◽  
Luigino Vitali
Keyword(s):  
Deep Water ◽  
Large Diameter ◽  
Fe Model ◽  
Offshore Pipelines ◽  
3 Dimensional ◽  
Deep Waters ◽  
Offshore Pipeline ◽  
Processing Program ◽  
Water Pipelines ◽  
Dimensional Finite Element

The future offshore pipeline development projects envisage the installation of medium to large diameter pipelines (16″ to 32″ ND) transporting gas from the deep waters to the shallow water areas. The development of these deep water projects is limited by the feasibility/economics of the construction phase using the J-lay or the S-lay technology. In particular, the S-lay feasibility depends on the applicable tension at the tensioner which is a function of water depth, stinger geometry (length and curvature), and installation criteria. In this paper: – The challenges of future deep water offshore pipelines are briefly presented; – The installation criteria at the overbend, stinger tip and sagbend are discussed; – The ABAQUS FE Model, developed to simulate pipeline installation, is presented together with the pre- and post-processing program put in place; – The results of the developed ABAQUS FE Model are given considering two typical examples of deep water pipelines installed in the S-lay mode.

On the Effect of the U-O-E Manufacturing Process on the Collapse Pressure of Long Tubes

1994 ◽  
Vol 116 (1) ◽  
pp. 93-100 ◽  
Author(s):  
S. Kyriakides ◽  
E. Corona ◽  
F. J. Fischer
Keyword(s):  
Manufacturing Process ◽  
Large Diameter ◽  
External Pressure ◽  
Cold Forming ◽  
Collapse Pressure ◽  
Circular Shape ◽  
Strain Behavior ◽  
Offshore Pipeline ◽  
Numerical Process ◽  
Two Stages

A commonly used process for manufacturing large-diameter tubes for offshore pipeline, riser and tension-leg platform tether applications involves the cold forming of long plates. The plates are bent into a circular shape and then welded. The circumference of the pipe is then plastically expanded to develop a high tolerance circular shape. Collectively, these steps comprise the U-O-E manufacturing process. These mechanical steps cause changes in the material properties and introduce residual stresses in the finished pipe. This paper presents the results of a combined experimental and analytical study of the effect on the U-O-E process on the capacity of the tube to resist collapse under external pressure loading. The U-O-E manufacturing process for a 26 in. (660 mm) diameter, 1.333 in. (33.86 mm) wall thickness pipe was simulated numerically. The numerical process was validated by comparing the predicted stress-strain behavior of the material at two stages in the process with properties measured from actual pipe specimens obtained from the mill. Following the simulation of the U-O-E process the collapse pressure was calculated numerically. The manufacturing process was found to significantly reduce the collapse pressure. A similar pipe for which the final sizing was conducted (simulated) with circumferential contraction (instead of expansion) was found not to have this degradation in collapse pressure.

Improved Collapse Resistance of Large Diameter Pipe for Deepwater Applications Using a New Impander Technology

2010 ◽  
Author(s):  
Thilo Reichel ◽  
Vitaliy Pavlyk ◽  
Jochem Beissel ◽  
Stelios Kyriakides ◽  
Wen-Yea Jang
Keyword(s):  
Yield Strength ◽  
New Technology ◽  
Large Diameter ◽  
Compressive Yield Strength ◽  
Cold Forming ◽  
Collapse Pressure ◽  
Large Diameter Pipe ◽  
Diameter Pipe ◽  
Improved Performance ◽  
Welded Pipe

Large diameter pipe is most commonly produced by the UOE and JCO processes. In both cases the pipe is finished by cold expansion, which is known to be the main contributor to the reduced collapse pressure of such pipe compared to seamless pipe of the same steel grade and diameter-to-thickness ratio. The main cause of this degradation in collapse pressure is a reduction in the compressive yield strength of the material that results from the cold forming steps involved, particularly the expansion. This paper presents a new manufacturing technology in which longitudinally welded pipe is finished by controlled compression. A newly developed cold sizing press, called Impander, is used to produce pipe that is rounder, has reduced residual stresses, and increased compressive yield strength. The combination of these factors can lead to a significant increase in the collapse pressure of the pipe. The new technology is first introduced followed by experimental and analytical results that demonstrate the improved collapse pressure of pipes manufactured by it. The enhancement in collapse pressure will be demonstrated using X-65 grade, 20-inch pipe with one-inch wall. Pipes are compressed to different degrees, and their dimensional characteristics and compressive mechanical properties are measured. The measurements are used in finite element models to calculate the collapse pressure demonstrating the improved performance. The advantages of the process will also be confirmed using results from full-scale collapse experiments on 20-inch pipe manufactured by the new process.

scholarly journals The Effect of Spiral Cold-Bending Manufacturing Process on Pipeline Mechanical Behavior

2016 ◽  
Author(s):  
Giannoula Chatzopoulou ◽  
Gregory C. Sarvanis ◽  
Chrysanthi I. Papadaki ◽  
Spyros A. Karamanos
Keyword(s):  
Internal Pressure ◽  
Manufacturing Process ◽  
Numerical Models ◽  
Large Diameter ◽  
External Pressure ◽  
Forming Process ◽  
Cold Forming ◽  
Cold Bending ◽  
Offshore Pipeline ◽  
Bending Capacity

Large-diameter spiral-welded pipes are employed in demanding hydrocarbon pipeline applications, which require an efficient strain-based design framework. In the course of a large European project, numerical simulations on spiral-welded pipes are conducted to examine their bending deformation capacity in the presence of internal pressure referring to geohazard actions, as well as their capacity under external pressure for offshore applications in moderate deep water. Numerical models that simulate the manufacturing process (decoiling and spiral cold bending) are employed. Subsequently, the residual stresses due to cold bending are used to examine the capacity of pipe under external pressure and internally-pressurized bending. A parametric analysis is conducted to examine the effect of spiral cold forming process on the structural behavior of spiral welded pipes and the effect of internal pressure on bending capacity. The results from the present study support the argument that spiral-welded pipes can be used in demanding onshore and offshore pipeline applications.

The Research of Large-Diameter & Energy-Saving More Medium Supplied Gravity-Fed Three-Product Heavy Medium Cyclone

2011 ◽  
Vol 211-212 ◽  
pp. 1072-1076
Author(s):  
Ping Huo ◽  
Li Qiang Zhang ◽  
Jing Bo Jia
Keyword(s):  
Energy Saving ◽  
Separation Efficiency ◽  
Simulation Analysis ◽  
New Technology ◽  
Large Diameter ◽  
Economic Benefits ◽  
Heavy Medium ◽  
Processing Ability ◽  
The One ◽  
High Processing

The characteristics and the development restrict factors in large-diameter area of the traditional three-product heavy medium cyclone are described. The paper mainly describes the structure and principles of large-diameter & energy-saving more medium supplied gravity-fed three-product heavy medium cyclone. The simulation analysis of this cyclone (DWP type) is presented. The results show that this type of more medium supplied cyclone is better than the one medium supplied cyclone for it has a faster separation speed, high processing ability and better separation efficiency. The applications in field of the 3SNWX1500/1100-Ⅳ type cyclone which using the new technology indicated that there have energy-saving, a high output, a stable separation efficiency, a high precision and a significant economic benefits.

The W501G Testing and Validation in the Siemens Westinghouse Advanced Turbine Systems Program

2001 ◽  
Author(s):  
Gregory R. Gaul ◽  
Ihor S. Diakunchak ◽  
Alfred M. Dodd
Keyword(s):  
New Technology ◽  
Department Of Energy ◽  
Load Testing ◽  
High Temperature Materials ◽  
Advanced Technologies ◽  
Turbine Vanes ◽  
Compressor Design ◽  
Steam Cooling ◽  
Power Generation Systems ◽  
The City

The Siemens Westinghouse Advanced Turbine System (ATS) has the ultimate goal of achieving greater than 60% LHV-based net plant thermal efficiency, less than 10 parts per million NOx emissions, a 10% reduction in cost of electricity, and reliability-availability-maintainability (RAM) equivalent to modern advanced power generation systems. The ATS program, which is supported by the U.S. Department of Energy, introduces advanced technologies in three evolutionary steps to minimize risks and to increase the net benefits of the program. The W501G, the first step in the ATS engine introduction, incorporates many ATS technologies such as closed-loop steam cooling, advanced compressor design, and high temperature materials. The lead unit has completed full-load testing at the City of Lakeland McIntosh #5 site in Lakeland, FL and has produced power and revenue for Lakeland Electric since May 2000. Results from the testing are presented and future developments are discussed. Building on the current W501G, advancements will include steam-cooled turbine vanes and leakage enhancements. Continuing this low risk step-wise introduction of new technology, the W501ATS engine adds further advanced designs that achieve the program objectives. Siemens Westinghouse is also infusing ATS technologies into its mature frames in both new units and service upgrades to maximize the benefit of the program.

New Technology Spiral SAW Pipes for Onshore and Offshore Oil and Gas Pipelines

2002 ◽  
Author(s):  
Josef Avagianos ◽  
Kostas Papamantellos
Keyword(s):  
Oil And Gas ◽  
Quality Management System ◽  
New Technology ◽  
Large Diameter ◽  
Production Capacity ◽  
Oil And Gas Industry ◽  
Step Method ◽  
Line Pipe ◽  
Water Transportation ◽  
Welded Pipe

The world production capacity on large-diameter welded pipe amounts to more than 12 million tons per year 20–25% are produced as spiral sub-arc welded (SAW) pipes, with the balance of 75–80% being longitudinal SAW pipes (from plates). For most spiral-weld producers, a sizeable portion of line pipe is for water transportation, rather than hydrocarbon. In the past, the relative structural weakness of spiral-welded pipe, due to larger welded area, limited the growth of its use in the oil industry. With the development of more advanced production technology, the acceptance of spiral-welded pipes in the oil and gas industry has increased significantly. In this paper, the principals of the spiral manufacturing technology from coil by the two-step-method are introduced and the innovations of Corinth Pipework’s production facility are outlined in detail, including the sophisticated NDT techniques and the Quality Management System.

Axial performance of micropile groups in cohesionless soil from full-scale tests

2020 ◽  
Vol 57 (7) ◽  
pp. 1006-1024
Author(s):  
Maged A. Abdlrahem ◽  
M. Hesham El Naggar
Keyword(s):  
Group Performance ◽  
Large Diameter ◽  
Small Diameter ◽  
Element Model ◽  
Cohesionless Soil ◽  
Drill Bit ◽  
Load Testing ◽  
Dense Sand ◽  
Full Scale Tests ◽  
Square Configuration

Hollow bar micropile (HBMP) groups are used for supporting large loads as an alternative foundation option to large diameter drilled shafts. In such cases, it may be necessary to increase the micropile’s diameter by increasing the drill bit diameter (Db). This paper investigates experimentally and numerically the effect of increasing Db and micropile spacing on the group performance. A field load testing program was conducted on four groups of HBMPs installed in sand; each group comprised four micropiles arranged in a square configuration. All micropiles were constructed with the same size hollow bar, Dh = 51 mm; two groups comprised micropiles constructed with drill bit, Db = 115 mm, and two groups comprised micropiles constructed with drill bit, Db = 152 mm. One group of each set was installed with spacing to micropile diameter ratio, S/Db = 3 and the other group with S/Db = 5. In addition, full 3D finite element model (FEM) was developed and calibrated to simulate the behaviour of micropile groups and to evaluate the failure load for groups that were not loaded to failure. The results demonstrated that micropile groups constructed with the large diameter drill bits displayed higher stiffness and load carrying capacity than the groups constructed with small diameter bits, which confirms the effectiveness of using a larger drill bit. In addition, the group efficiency ratio values at both working load and ultimate capacity were found to be close to unity for all groups. The ultimate skin friction values of grouted micropiles obtained from this study were higher than the values suggested by the US Federal Highway Administration for medium to very dense sand. It was also found that the settlement of the 4-HBMP group increased by 25% to 33% over that of a single HBMP due to group effect.

Sign in / Sign up

Export Citation Format

Share Document