Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51318-11358-Microstructural Control for Sour Service Drill Pipe Riser

Picture for Microstructural Control for Sour Service Drill Pipe Riser
Available for download

Results of the testing qualification process, which was co-developed by the involved companies, to meet mechanical properties in the weld line region and microstructures that make the DPR suitable for operations in H2S enriched environments.

Product Number: 51318-11358-SG
Author: Rodrigo Barreto / Rodrigo Spadinger / João Santos / Ricardo Rodrigues / Robert Badrak / William Howie / Annelise Zeemann / Guilherme Emygdio / Carlos Henrique Fontes
Publication Date: 2018
Industry: Oil and Gas Production
$0.00
$20.00
$20.00

Drillpipe risers (DPR) constructed with high sulfide stress cracking (SSC) resistance are designed and fabricated to suit subsea completion and early production operations in sour environments (H2S). Early production operations typically include extended well testing (EWT), which is required to evaluate production characteristics. The riser string, among other components, is composed of drillpipe riser joints. The DPR joint manufacturing process includes welding a tool joint with a pipe body via rotary friction. The tool joint is a forged, quenched and tempered high strength low alloy steel piece with threaded connectors. The pipe body is a high strength low alloy seamless tube with upset ends, which are also fully quenched and tempered. After the friction weld process, the heat affected zone (HAZ) of the weld is heat treated to meet material properties and performance requirements.

Performance requirements in sour service wells include material low hardness which is difficult to obtain on high strength quenched and tempered steel, especially on a weld zone. With this challenge in mind, a DPR manufacturer engineered a superior combination of chemistry, friction welding conditions, and heat treatment parameters that are designed to meet both mechanical and SSC resistance requirements for sour service.

This paper presents the results of the testing qualification process, which was co-developed together by the involved companies, using joints with extremely accurate thermal cycles control and chemistry balance, to meet mechanical properties in the weld line region and microstructures that make the DPR suitable for operations in H2S enriched environments. The post welding heat treatment (PWHT) variables were critical, since tiny variations resulted in major differences among samples. Each sample was evaluated through optical microscopy (OM) and scanning electron microscopy (SEM), mechanical testing and SSC resistance test according NACE TM0177. The temperatures and time limits for the PWHT cycles associated with the tempering effects on the microstructure were determinant to maintain optimal performance in the H2S test.

Drillpipe risers (DPR) constructed with high sulfide stress cracking (SSC) resistance are designed and fabricated to suit subsea completion and early production operations in sour environments (H2S). Early production operations typically include extended well testing (EWT), which is required to evaluate production characteristics. The riser string, among other components, is composed of drillpipe riser joints. The DPR joint manufacturing process includes welding a tool joint with a pipe body via rotary friction. The tool joint is a forged, quenched and tempered high strength low alloy steel piece with threaded connectors. The pipe body is a high strength low alloy seamless tube with upset ends, which are also fully quenched and tempered. After the friction weld process, the heat affected zone (HAZ) of the weld is heat treated to meet material properties and performance requirements.

Performance requirements in sour service wells include material low hardness which is difficult to obtain on high strength quenched and tempered steel, especially on a weld zone. With this challenge in mind, a DPR manufacturer engineered a superior combination of chemistry, friction welding conditions, and heat treatment parameters that are designed to meet both mechanical and SSC resistance requirements for sour service.

This paper presents the results of the testing qualification process, which was co-developed together by the involved companies, using joints with extremely accurate thermal cycles control and chemistry balance, to meet mechanical properties in the weld line region and microstructures that make the DPR suitable for operations in H2S enriched environments. The post welding heat treatment (PWHT) variables were critical, since tiny variations resulted in major differences among samples. Each sample was evaluated through optical microscopy (OM) and scanning electron microscopy (SEM), mechanical testing and SSC resistance test according NACE TM0177. The temperatures and time limits for the PWHT cycles associated with the tempering effects on the microstructure were determinant to maintain optimal performance in the H2S test.

Product tags
Also Purchased
Picture for Comparison of resistance to cathode with resistance to ground in the marine environment
Available for download

51318-11352-Comparison of resistance to cathode with resistance to ground in the marine environment

Product Number: 51318-11352-SG
Author: John Baynham / Tim Froome
Publication Date: 2018
$20.00

This paper investigates resistance through the electrolyte between the anode surfaces and the surfaces of the cathode, using techniques which include polarisation effects on the cathode surfaces.
Picture for Scale And Corrosion Control Mechanisms for Condensate Feedwater and Boilers in Industrial Systems
Available for download

51318-11361-Scale And Corrosion Control Mechanisms for Condensate Feedwater and Boilers in Industrial Systems

Product Number: 51318-11361-SG
Author: John A. Kelly / Chad D. Frierson / Andrew C. Doak
Publication Date: 2018
$20.00

Pertinent mechanisms of scale and deposition control processes as well as the sources of contaminants are discussed. Methods of prevention and control parameters are demonstrated with laboratory and field results.
Picture for Electrochemical Measurements of Steel Corrosion for Modeling H2 Generation
Available for download

51318-11370-Electrochemical Measurements of Steel Corrosion for Modeling H2 Generation

Product Number: 51318-11370-SG
Author: V.K. Gattu / W.L. Ebert / N. Tehrani / J.E. Indacochea
Publication Date: 2018
$20.00

We are using electrochemical methods to measure the corrosion rates of low alloy steels, stainless steels, and Zircaloy-4 that can be used to represent H2 generation rates under the range of Eh-pH conditions that could occur in a disposal system.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support