WO2008111828A2 - Tuberia de acero sin costura para usarse como un elevador catenario de acero en el area de contacto - Google Patents
Tuberia de acero sin costura para usarse como un elevador catenario de acero en el area de contacto Download PDFInfo
- Publication number
- WO2008111828A2 WO2008111828A2 PCT/MX2008/000041 MX2008000041W WO2008111828A2 WO 2008111828 A2 WO2008111828 A2 WO 2008111828A2 MX 2008000041 W MX2008000041 W MX 2008000041W WO 2008111828 A2 WO2008111828 A2 WO 2008111828A2
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- WIPO (PCT)
- Prior art keywords
- overhang
- max
- seamless steel
- steel pipe
- pipe body
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- Ceased
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
- E21B17/015—Non-vertical risers, e.g. articulated or catenary-type
Definitions
- This invention relates to seamless steel tubes for use as a catenary steel elevator.
- SCR Steel Catenary Elevators
- the Steel Catenary Elevator is a proven and economical elevator system solution, as a union production elevator and as an exporting elevator for the Floating Production Systems (FPS) in the oil field development and gas in deep water and ultra-deep water.
- the application of SCRs is attacked by, in some cases, high fatigue damage in the Contact Area (TDZ) based on a combination of specific field parameters such as elevator size , fluid characteristics, vessel movements, Metocean parameters
- the most severe design requirement for SCRs is the fatigue life of circumferential welds in the Contact Area (TDZ) region, where the elevator makes contact with the sea floor and connects with the rest of the pipe, how is it ustra in Figure 1.
- the elevator experiences the highest level of cumulative fatigue damage. This is due to the fact that in said area, the highest bending of the catenary line is experienced, contrary to the total absence of bending of the portion of the line that lies on the sea floor. Due to the various movements of the SPF (waves, tides, currents, etc.), the line segment in the TDZ experiences bending cycles between the maximum flexion of the elevator and the flexion of zero (straight).
- the severity of fatigue load in the TDZ is further complicated by the presence of continuous impacts of the portion of the line when it comes into contact with the earth.
- the same impact of the line can dig a hole just in correspondence of the TDZ, amplifying the amplitude of the bending cycle.
- the constant movement through the upper floating vessel results in a cyclic crushing for the elevator against the sea floor which, if not properly designed, could result in fatigue breakage.
- other factors that can increase the severity of the fatigue of the TDZ include a large diameter of the pipe, deep water depth, high currents, and service in acidic media (corrosion degradation).
- the highlighting procedure is commonly used in the industry for roof and elevator joints with threaded ends. Steel grades with a higher carbon content are usually used for these applications. The highlighting procedure has not been used so far for SCR quality weldable pipe. In most of the threaded cases, however, the increase in fatigue life has been limited to a factor between 2 to 3. In the case of plated steel applications, a higher increase in fatigue life can be obtained. .
- the alternative catenary elevator design has been developed by changing the elevator tube material (composite, titanium) or through hybrid designs (titanium or steel), or by changing the shape near the bottom of the sea through the provision of significant buoyancy (WO 97/06341). Alternative designs have focused on the improvement of Ia resistance of the catenary elevator near and above the sea floor, thus allowing its use in rougher and more challenging applications.
- overflow pipes have been developed in welded joints.
- the simple concept for improved fatigue operation consists, in this case, in a red network (usually the tension experienced by welding with respect to the voltage scale generally experienced by the pipe body and, therefore, the elevator section In the TDZ, a SCR of overheating of a chemical composition with a low carbon content and microstructure in this way was advised to obtain a superior improvement in fatigue life since it is comprised of the elevator pipe section.
- the reliability of the manufacture of the Thick Overhanging End Elevator for the Contact Area with improved fatigue resistance varies, however, with the degree of steel that can be welded for open sea applications. Reliability for manufacturing a thick end Elevator for the Contact Area with improved fatigue resistance is the key to ensuring that the overheating SCR has a practical value in the application in the TDZ.
- the Acid Media Service is the operation of the Elevator in H 2 S environments.
- the known metallurgical properties for operating in environments containing H 2 S include: Chemical composition, steel cleaning, manufacturing method, strength, quantity Cold work, heat treatment conditions and microstructure. Since the process of manufacturing the overflow pipe involves additional subsequent steps to the manufacture of the seamless pipe, the end product has to achieve these requirements.
- the present invention describes an overheating SCR of a chemical composition with a low novel carbon content and microstructure that achieves a superior improvement in fatigue life since it is integral with the elevator pipe section in the Contact Area.
- the low carbon SCR overheating achieves its desired properties through the heat treatment to which it is subjected.
- the chemical composition with a low novel carbon content and microstructure comprise as a percentage weight, carbon 0.04-0.10, manganese 0.40-0.70, silicon 0.15-0.35, chromium 0.40-0.70, molybdenum 0.40-0.70, nickel 0.10-0.40, nitrogen 0.008 max. , aluminum 0.010-0.045, sulfur 0.005 max. , phosphorus 0.020 max.
- the present invention also describes a method for manufacturing a seamless steel pipe for a steel catenary elevator with overhang ends having an elastic limit of at least 4569.50 kg / cm 2 both in the pipe body, transition and the overhang area , which includes the steps of:
- (a) provide a steel pipe which comprises in percentage by weight, carbon 0.04-0.10, manganese 0.40-0.70, silicon 0.15-0.35, chromium 0.40-0.70, molybdenum 0.40-0.70, nickel 0.10-0.40, nitrogen 0.008 max. , aluminum 0.010-0.045, sulfur 0.005 max. , phosphorus 0.020 max. , titanium 0.003-0.020, niobium 0.020-0.035, vanadium no more than 0.10, copper 0.20 max. , tin 0.020 max. , and carbon equivalent 0.43 max. and PCM of no more than 0.23;
- Figure 1 shows the Steel Catenary Elevator Configuration of a preferred embodiment of the present invention.
- Figure 2 illustrates an embodiment of the pipe with an overlapping end of a preferred embodiment of the present invention.
- Figure 3 shows typical macro-sections of welds
- Figures 4 (a) and (b) show the results of the tensile test for the longitudinal direction and transverse direction of a preferred embodiment of the present invention.
- Figure 5 illustrates the results of the longitudinal and transverse Y / T ratio of a preferred embodiment of the present invention.
- Figure 6 shows the Vickers Hardness HV1 0 of a preferred embodiment of the present invention.
- Figure 7 illustrates the Charpy V Notch Impact Test
- Figure 8 shows the Average Curve for 1 0 3/4 "x 0.866" X65 specimens of a preferred embodiment of the present invention.
- Figures 9 (a) and 9 (b) show the test results to Ia traction for the longitudinal direction and the transverse direction of a preferred embodiment of the present invention.
- Figure 10 illustrates the results of the longitudinal and transverse Y / T ratio of a preferred embodiment of the present invention.
- Figure 1 shows the Vickers Hardness HV10 of a preferred embodiment of the present invention.
- Figure 12 illustrates the Charpy V Transverse Notch Impact Test at -3O 0 C of a preferred embodiment of the present invention.
- Figure 13 shows the Average Curve for 1 0 3/4 "x 1 .250" X65 specimens of a preferred embodiment of the present invention.
- the present invention J describes an overheating SCR of a chemical composition with a novel low carbon content and microstructure that achieves a superior improvement in fatigue life since it is integral with the pipe section of Elevator in the Contact Area.
- the SCR of recalcad ura with low carbon content achieves its desired properties through term treatment to which it is subjected.
- the degree of zero contemplated for use in the overheating SCR of the present invention is X-65 (an elastic limit of at least 4569.50 kg / cm 2 in the pipe body and in the overhang ends).
- the alloy design consists of a steel with low C content (0.13 max.), Low Mn (1.5 max.) With additions of microalloy elements such as Niobium, Titanium (Nb + Ti 0.1 max.), Chrome and Molybdenum (Cr + Mo 1 .2 max.).
- the purpose of adding these last two alloy elements is to increase the capacity of end urecimiento and promote a martensitic-bacterial transformation in the thick overhang ends and pipe body achieving a high resistance.
- the carbon equivalent (CE) is designed not to exceed .43 sec as required by API 5L. Most preferably, the carbon equivalent is limited to 0.41. The most preferred embodiment of the present invention does not exceed 0.39.
- the pipes are heat rolled using a recrystallization controlled winding scheme manufactured from round billets through a continuous casting (CC) procedure. After heat winding, the pipes are then inspected with non-destructive methods such as electromagnetic inspection, wet magnetic particle inspection and ultrasonic testing in order to find any longitudinal or transverse defects on the internal or external surfaces and to verify the thickness of The wall.
- the pipes are then stressed by reheating the pipe ends above the dissolution temperature of the Nb (C, N) to provide adequate plastic flow during each overheating operation while controlling the grain size of The austenite through the precipitation of fine TiN particles.
- the optimum radius in the transition of the stressed pipe body is modeled through the Finite Element Analysis (FEA), where the Stress Concentration Factor (SCF) resulted in 1 .1 35 and 1 .12 for Case 1 (273.1 mm OD by 22.0 mm WT of the pipe body, 28 mm WT as the machined overhang ends and 35 mm as the overhang ends, steel grade X65 for service application without medium acids, 10.75 "x 0.866”) and Case 2 (273.1 mm OD by 31 .8 mm WT Pipe body, 45 mm WT as machined Recalcation Ends and 53 mm as overhang ends, X65 steel grade for medium acid service application, 10.75 "x 1. 250 "), respectively.
- SCF Stress Concentration Factor
- the Elastic Limit (YS), the Final Tensile Strength (UTS) and the YS / UTS ratio at room temperature were evaluated using round specimens both longitudinal and transverse taken from the regions of Recalcadura End, Tilt Transition and Pipe Body in two quadrants, 0 o and 180 °.
- the Vickers HV10 hardnesses were measured in the OD (external diameter), MW (middle wall) and ID (internal diameter) sections in 4 quadrants were taken from the Overhead, Transition Transition and Pipe Body regions. . Hardness readings were taken at 1.5 mm from the OD and ID.
- the impact test of transverse notch Charpy V was carried out at -3O 0 C and -4O 0 C for case 1 and case 2, respectively using 10x10 specimens.
- the service resistance in acid media was analyzed both in the pipe body and the overhang ends through the Hydrogen Induced Cracking Tests (HI C) of Four Point Flexion (FPBT).
- the present invention thus describes a seamless steel pipe for a steel catenary elevator with overhang ends comprising in percentage by weight, carbon 0.04-0.10, manganese 0.40-0.70, silicon 0.15-0.35, chromium 0.40-0.70, molybdenum 0.40-0.70, nickel 0.10-0.40, nitrogen 0.008 max. , aluminum 0.010-0.045, sulfur 0.005 max. , phosphorus 0.020 max. , titanium 0.003-0.020, niobium 0.020-0.035, vanadium no more than 0.10, copper 0.20 max. , Tin 0.020 max. , and carbon equivalent 0.43 max.
- the novel microstructure of the overheating SCR that allows the seamless steel pipe to achieve a superior improvement in fatigue life includes the following mechanical properties and corrosion requirements for the Recalcadura SCR as shown in Table 1. The minimum requirements are after the API 5L specification, 43 ava 'Edition.
- Cured 2 shows a summary of observed microstructures. All microstructures are homogeneous in the middle wall, which is the most critical section where mainly the bainite, and a mixture of acicular and non-polygonal ferrite is observed independent of the section (body of pipe, transition or overhang). There is a slight presence of martensite near the OD and ID sections.
- the present invention also describes a method for manufacturing a seamless steel pipe for the catenary elevator of steel with ends of overhang having an elastic limit of at least 4569.50 kg / cm 2 both in the pipe body, transition and the area of overhang, comprising the steps of: (a) providing a steel pipe comprising in percentage by weight, carbon 0.04-0.10, manganese 0.40-0.70, silicon 0.15-0.35, chromium 0.40-0.70, molybdenum 0.40-0.70, nickel 0.10-0.40, nitrogen 0.008 max. , aluminum 0.010-0.045, sulfur 0.005 max. , phosphorus 0.020 max.
- overflow pipes subjected to different thermal cycles induced by welding operations were evaluated, initially by welding in a pipe with a thickness of 35 mm wall with chemistry as the ends of overheating.
- This specific welding preparation with one of the bevels at 0 or allows quantifying the toughness (impact and CTOD test) of HAZ under more severe conditions than with the conventional V or U bevel (fatigue cracking is placed in the HAZ material of coarse grain prescribed for at least 15% of the two central thirds of the specimen thickness).
- the weldability test requires the characterization of HAZ for two cases subjected to different heat combinations using an API PR2Z bezel: Pre-production quantification for Steel Plates for Open Sea Structures [8], All tests passed or exceeded requirements including hardness HV10 below 250 for the case of service in acidic media (Case 2).
- the HAZ characterization has been run on both overhang pipes with a thickness of 28 mm and 45 mm at the ends of the overhang, with the welding conditions listed in Table 4.
- the consumables and heat input used are:
- P-GMAW for filling and coverage steps with heat input 0.6 kJ / mm
- - SAW for filling and coverage steps with heat input equal to or greater than 0.8 kJ / mm.
- the hardness indentations in HAZ are located in lines parallel to the pipe body, 1.5 mm from the internal and external diameter of the pipe and every 4 mm through the thickness.
- the welding conditions are: - a minimum heat input of 0.65 kJ / mm combined with a preheating temperature of 200 0 C for root passage , a minimum heating input of 0.8 kJ / mm combined with a temperature between steps of 200 0 C for filling steps, - a minimum heating input of 0.8 kJ / mm combined with a temperature between steps of 25O 0 C for deck steps.
- the last bead is not on one side of a bevel but is deposited within the width of the weld preparation so that each cover step at the edges of the bevel obtains the benefit of a winding effect of subsequent cover steps.
- the hardness in HAZ does not exceed 250 HV10.
- Case 1 273.1 mm OD pipe body by 22.0 mm WT, 28 mm WT as machined Recalcation Ends and 35 mm as overhang ends, X65 steel grade for service application without acidic media (10.75 "x 0.866").
- Case 2 273.1 mm OD pipe body by 31.8 mm WT, 45 mm WT as machined Recalcation Ends and 53 mm as overhang ends, X65 steel grade for service application in acidic media (10.75 "x 1.250" ).
- Figures 4 (a) and 4 (b) and 5 show the elastic limit (YS), Final Tensile Strength (UTS) and the ratio of YS / UTS evaluated at room temperature for extinguished and tempered material.
- YS elastic limit
- UTS Final Tensile Strength
- Figures 4 (a) and 4 (b) and 5 show the elastic limit (YS), Final Tensile Strength (UTS) and the ratio of YS / UTS evaluated at room temperature for extinguished and tempered material.
- Round longitudinal and cross-sectional specimens taken from sections representing the Recalch End, Tilt Transition and Pipe Body were tested in two quadrants, 0 o and 180 °. All specimens are standard rounds, except for those of the pipe body in the transverse direction, which are of round sub-size.
- Figures 4 (a) and 4 (b) show all the values of YS and UTS obtained from the tensile test in the longitudinal and transverse directions, respectively.
- Figures 4 (a) and (b) show that all the Elastic Limit values obtained are above a minimum of 4569.5 kg / cm 2 and do not exceed the maximum of 5624 kg / cm 2 . All the values of Final Tensile Strength obtained are above a minimum established of 5413.1 kg / cm 2 .
- Figure 5 shows that, for the YS / UTS ratio, all values are below 0.89, which is established as the maximum YS / UTS specification.
- the values of the YS / UTS ratio are shown in Figure 5 for both longitudinal and transverse directions.
- Vickers hardness HV10 (and readings per row) was measured in the OD, MW and ID sections in 4 quadrants taken from the regions of End of Recalcadura, Tilt Transition and Pipe Body. Hardness readings were taken 1.5 mm from the outer diameter (OD) and inner diameter (ID). The results of the test of the extinguished and tempered HV10 material are shown in Figure 6.
- case 1 Although the material of case 1 is initially not considered for service application in acidic media, as shown in Ia
- Adsorbed energy is above 70 Joules, which is set as the minimum target and 90 Joules as the minimum average of 3 specimens.
- the transition temperature obtained in the transverse direction using 10x10 Charpy V notch specimens in the material representing the pipe body and overhang end is below -6O 0 C as shown in Tables 5 (a) and (b).
- CTOD results representing the pipe body and overhang end, as shown in Table 6, show exceptional results above 0.6 mm at -3O 0 C.
- Samples were prepared from a material so extinguished and thus extinguished and tempered for microstructural analysis.
- the transverse face towards the metallurgically winding axis was prepared by filling with sand a sandpaper 600 and polished to a mirror-like appearance with diamond paste and chemically attacked with 2% Nital to make microstructural observations through an optical microscope.
- microstructures were observed in the OD, MW and ID sections of pipe body regions, tilt transition and overhang end. Two quadrants, 0 o and 180 ° were obtained, 500X photomicrographs representing the microstructure from OD, MW and ID.
- the microstructure observed in the pipe body after the extinction consisted of a predominantly mixture of bainite and acicular ferrite through the wall thickness and a slight presence of martensite near the external and internal surface.
- bainite and acicular ferrite and some regions of non-polygonal ferrite were observed through the wall thickness in the overhang section.
- the previous austenitic grain size (PAGS) was measured using image analysis on the material thus extinguished chemically attacked with aqueous picric acid in samples of the pipe body and the overhang end to quadrants of 0 or 1 and 80 °, giving as resulted in an average size of 9/10 ASTM.
- the microstructure after the tempering treatment consisted predominantly of bainite and acicular ferrite that were observed through the wall thickness in the material representing the pipe body, tilt transition and overhang end.
- the transition temperature obtained in the transverse direction using 10 x 10 specimens of Charpy V-shaped is between -5O 0 C and 6O 0 C for the material that represents the overhang end and below -7O 0 C for the material which represents the pipe body as shown in Table 9.
- the transition temperature obtained in the transverse direction using 10 x 10 specimens of Charpy V notch is between -5O 0 C and -6O 0 C for the material representing the overhang end and below -7O 0 C for material that represents The pipe body as shown in Table 7.
- CTOD results of the material representing the pipe body and the overhang end are above 0.6 mm at -1 0 ° C as shown in Table 8.
- the SSC Four Point Flexion Test was performed in 1 sample representing the overhang end and another representing the pipe body. Each group of 3 specimens (3 quadrants, 0 o , 120 ° and 240 °) representing the pipe body and another group representing the overhang end were tested as per ASTM G48. The test solution "A" of NACE TM0177 was considered.
- test voltage is 95% of the Minimum Specified Elastic Limit (S MYS) and two test periods of 96 hours and 720 hours. The results are shown in Tables 1 1 and 12.
- Optical Microscopy and Scanning Electron Microscopy was used to characterize the material.
- the microstructural analysis was performed in the OD, MW and ID sections of the regions of pipe body, tilt transition and overhang end in two quadrants 0 or 180 ° for samples in the condition thus extinguished and in the condition extinguished and returned.
- the microstructure thus extinguished of the pipe body consisted predominantly of bainite and acicular ferrite in the middle wall, near the external and internal surface, a slight presence of martensite was observed.
- the PAGS was measured using image analysis in the material thus extinguished, chemically attacked with aqueous picric acid in samples of the pipe body and overhang end. An average PAGS size of 7/8 ASTM was obtained for both the pipe body and the overhang end, respectively.
- the microstructure in the middle wall after tempering consisted predominantly of bainite and acicular ferrite in the pipe body and tilt transition; and bainite, acicular ferrite and non-polygonal ferrite at the ends of the overhang.
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Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2680943A CA2680943C (en) | 2007-03-15 | 2008-03-14 | A seamless steel tube for use as a steel catenary riser in the touch down zone |
| BRPI0808963-9A BRPI0808963A2 (pt) | 2007-03-15 | 2008-03-14 | Tubo de aço sem costura para ser usado como riser rígido em catenária com extremidades reforçadas, método para fabricar um tubo de aço sem costura para ser usado como riser rígido em catenária com extremidades reforçadas, sequência tubular para ser usada como riser rígido em catenária |
| EP08741588A EP2157197A2 (en) | 2007-03-15 | 2008-03-14 | Seamless steel pipe to be used as a steel catenary riser in the touchdown zone |
| MX2009009905A MX340352B (es) | 2007-03-15 | 2008-03-14 | Tuberia de acero sin costura para usarse como una columna ascente catenaria de acero en el area de contacto. |
| NO20093020A NO20093020L (no) | 2007-03-15 | 2009-09-18 | Somlost stalror for bruk som fleksibelt stalstigeror i et nedslagsfelt |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91806507P | 2007-03-15 | 2007-03-15 | |
| US60/918,065 | 2007-03-15 | ||
| US12/073,879 US20080226396A1 (en) | 2007-03-15 | 2008-03-11 | Seamless steel tube for use as a steel catenary riser in the touch down zone |
| US12/073,879 | 2008-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008111828A2 true WO2008111828A2 (es) | 2008-09-18 |
| WO2008111828A3 WO2008111828A3 (es) | 2009-01-15 |
Family
ID=39619243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/MX2008/000041 Ceased WO2008111828A2 (es) | 2007-03-15 | 2008-03-14 | Tuberia de acero sin costura para usarse como un elevador catenario de acero en el area de contacto |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20080226396A1 (es) |
| EP (1) | EP2157197A2 (es) |
| BR (1) | BRPI0808963A2 (es) |
| CA (1) | CA2680943C (es) |
| MX (1) | MX340352B (es) |
| NO (1) | NO20093020L (es) |
| WO (1) | WO2008111828A2 (es) |
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|---|---|---|---|---|
| WO2023245268A1 (en) | 2022-06-22 | 2023-12-28 | Subsea 7 Do Brasil Servicos Ltda | Improving fatigue resistance of steel catenary risers |
| WO2023245267A1 (en) | 2022-06-22 | 2023-12-28 | Subsea 7 Do Brasil Servicos Ltda | Improving fatigue resistance of steel catenary risers |
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| CN100545291C (zh) | 2003-04-25 | 2009-09-30 | 墨西哥钢管股份有限公司 | 用作导管的无缝钢管和获得所述钢管的方法 |
| US9040865B2 (en) | 2007-02-27 | 2015-05-26 | Exxonmobil Upstream Research Company | Corrosion resistant alloy weldments in carbon steel structures and pipelines to accommodate high axial plastic strains |
| MX2007004600A (es) * | 2007-04-17 | 2008-12-01 | Tubos De Acero De Mexico S A | Un tubo sin costura para la aplicación como secciones verticales de work-over. |
| US7862667B2 (en) | 2007-07-06 | 2011-01-04 | Tenaris Connections Limited | Steels for sour service environments |
| DE102007034895A1 (de) * | 2007-07-24 | 2009-01-29 | V&M Deutschland Gmbh | Verfahren zur Herstellung von warmgefertigten nahtlosen Rohren mit optimierten Ermüdungseigenschaften im verschweißten Zustand |
| WO2009065432A1 (en) * | 2007-11-19 | 2009-05-28 | Tenaris Connections Ag | High strength bainitic steel for octg applications |
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| US20100319814A1 (en) * | 2009-06-17 | 2010-12-23 | Teresa Estela Perez | Bainitic steels with boron |
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| EP2789700A1 (en) | 2013-04-08 | 2014-10-15 | DALMINE S.p.A. | Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes |
| EP2789701A1 (en) | 2013-04-08 | 2014-10-15 | DALMINE S.p.A. | High strength medium wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes |
| JP6144417B2 (ja) | 2013-06-25 | 2017-06-07 | テナリス・コネクシヨンズ・ベー・ブイ | 高クロム耐熱鋼 |
| DE102014102452A1 (de) * | 2014-02-25 | 2015-08-27 | Vallourec Deutschland Gmbh | Verfahren zur Herstellung von warmgewalzten, nahtlosen Rohren aus umwandlungsfähigem Stahl, insbesondere für Rohrleitungen für Tiefwasseranwendungen und entsprechende Rohre |
| US20160305192A1 (en) | 2015-04-14 | 2016-10-20 | Tenaris Connections Limited | Ultra-fine grained steels having corrosion-fatigue resistance |
| US10066445B2 (en) * | 2015-12-16 | 2018-09-04 | Artifex Engineering, Inc. | Tubular connection assembly for improved fatigue performance of metallic risers |
| US11124852B2 (en) | 2016-08-12 | 2021-09-21 | Tenaris Coiled Tubes, Llc | Method and system for manufacturing coiled tubing |
| DE102016115026B4 (de) | 2016-08-12 | 2018-03-08 | Vdm Metals International Gmbh | Verfahren zur Herstellung von walzplattierten Blechen sowie walzplattierte Bleche |
| US10434554B2 (en) | 2017-01-17 | 2019-10-08 | Forum Us, Inc. | Method of manufacturing a coiled tubing string |
| GB2569790B (en) * | 2017-12-21 | 2020-10-21 | Technip France | Method of Preparing a Pipe-Section |
| WO2020093129A1 (pt) * | 2018-11-07 | 2020-05-14 | Petróleo Brasileiro S.A. - Petrobras | Tubo rígido metálico com extremidades mais espessas, riser submarino, processo e sistema de fabricação de tubo rígido metálico com extremidades mais espessas |
| CN119375225A (zh) * | 2024-12-04 | 2025-01-28 | 上海交通大学 | 厚板搅拌摩擦焊缝的非均匀本构参数表征方法 |
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| WO1997006341A1 (en) | 1995-08-03 | 1997-02-20 | Den Norske Stats Oljeselskap A/S | Riser |
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| US2289271A (en) * | 1939-01-03 | 1942-07-07 | Kane Boiler Works Inc | Pipe connection |
| CA2289084C (en) * | 1997-05-19 | 2007-03-13 | Cbmm Technology Suisse Sa | Linepipe and structural steel produced by high speed continuous casting |
| US5993570A (en) * | 1997-06-20 | 1999-11-30 | American Cast Iron Pipe Company | Linepipe and structural steel produced by high speed continuous casting |
| CN1144893C (zh) * | 2000-02-28 | 2004-04-07 | 新日本制铁株式会社 | 成形性优良的钢管及制造这种钢管的方法 |
| NO315284B1 (no) * | 2001-10-19 | 2003-08-11 | Inocean As | Stigerör for forbindelse mellom et fartöy og et punkt på havbunnen |
| JP4945946B2 (ja) * | 2005-07-26 | 2012-06-06 | 住友金属工業株式会社 | 継目無鋼管およびその製造方法 |
| MXPA05008339A (es) * | 2005-08-04 | 2007-02-05 | Tenaris Connections Ag | Acero de alta resistencia para tubos de acero soldables y sin costura. |
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2008
- 2008-03-11 US US12/073,879 patent/US20080226396A1/en not_active Abandoned
- 2008-03-14 WO PCT/MX2008/000041 patent/WO2008111828A2/es not_active Ceased
- 2008-03-14 MX MX2009009905A patent/MX340352B/es active IP Right Grant
- 2008-03-14 CA CA2680943A patent/CA2680943C/en not_active Expired - Fee Related
- 2008-03-14 EP EP08741588A patent/EP2157197A2/en not_active Withdrawn
- 2008-03-14 BR BRPI0808963-9A patent/BRPI0808963A2/pt not_active IP Right Cessation
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2009
- 2009-09-18 NO NO20093020A patent/NO20093020L/no not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997006341A1 (en) | 1995-08-03 | 1997-02-20 | Den Norske Stats Oljeselskap A/S | Riser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245268A1 (en) | 2022-06-22 | 2023-12-28 | Subsea 7 Do Brasil Servicos Ltda | Improving fatigue resistance of steel catenary risers |
| WO2023245267A1 (en) | 2022-06-22 | 2023-12-28 | Subsea 7 Do Brasil Servicos Ltda | Improving fatigue resistance of steel catenary risers |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2680943C (en) | 2014-12-09 |
| EP2157197A2 (en) | 2010-02-24 |
| BRPI0808963A2 (pt) | 2014-08-26 |
| MX2009009905A (es) | 2010-01-18 |
| WO2008111828A3 (es) | 2009-01-15 |
| NO20093020L (no) | 2010-01-04 |
| CA2680943A1 (en) | 2008-09-18 |
| MX340352B (es) | 2016-07-05 |
| US20080226396A1 (en) | 2008-09-18 |
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