TY - JOUR

T1 - Experimental investigation and numerical simulation of swaging process of tubes for oil country tubular goods

AU - Saberi, Saeid

AU - Reiter, Christian

AU - Winter, Gerald

AU - Klarner, Jürgen

AU - Stockinger, Martin

N1 - Publisher Copyright: © The Author(s) 2024.

PY - 2024/10/1

Y1 - 2024/10/1

N2 - Premium integrated seamless pipes made from high strength low alloy steels are used to produce oil country tubular goods. Operational requirements of these pipes in petroleum industry lead to an adequate tube end connection with better mechanical strength and sealing properties. Therefore a cold swaging process or calibration of pipe end is necessary for the mechanical threading process of the tube. Applications of typical calibration mandrels result in heavy wear due to higher swaging loads and the optimal necessary geometry of end tube could not be achieved. In this study, a new mandrel geometry with a finished surface was developed to modify the pipe end profile and reduce the wear tool. The investigated pipe made from P110- pipe steel was plastically preformed using a cold swaging process. Experimental measurements of the pipe end geometry after swaging process resulted an increase of the inner tube diameter of approximately 4.9% and an outer tube diameter of 3.7% respectively. Furthermore, a rather constant tube wall thickness was also observed. An Abaqus plug-in was developed to characterize the swaging process of pipe ends. The influence of friction between tool and pipe surfaces on the final geometry of pipe ends and residual stresses in pipe ends due to preforming were numerically predicted. The new designed swaging process resulted a better final pipe end geometry and low tool wear during the preforming of pipe end. The presented plug-in in this work could be used for tool optimization and characterization of swaging process of pipes in oil and gas industries.

AB - Premium integrated seamless pipes made from high strength low alloy steels are used to produce oil country tubular goods. Operational requirements of these pipes in petroleum industry lead to an adequate tube end connection with better mechanical strength and sealing properties. Therefore a cold swaging process or calibration of pipe end is necessary for the mechanical threading process of the tube. Applications of typical calibration mandrels result in heavy wear due to higher swaging loads and the optimal necessary geometry of end tube could not be achieved. In this study, a new mandrel geometry with a finished surface was developed to modify the pipe end profile and reduce the wear tool. The investigated pipe made from P110- pipe steel was plastically preformed using a cold swaging process. Experimental measurements of the pipe end geometry after swaging process resulted an increase of the inner tube diameter of approximately 4.9% and an outer tube diameter of 3.7% respectively. Furthermore, a rather constant tube wall thickness was also observed. An Abaqus plug-in was developed to characterize the swaging process of pipe ends. The influence of friction between tool and pipe surfaces on the final geometry of pipe ends and residual stresses in pipe ends due to preforming were numerically predicted. The new designed swaging process resulted a better final pipe end geometry and low tool wear during the preforming of pipe end. The presented plug-in in this work could be used for tool optimization and characterization of swaging process of pipes in oil and gas industries.

KW - Oil country tubular goods

KW - Pipe end connection

KW - Plastic deformation

KW - Quenched tempered pipe steel

KW - Simulation

KW - Swaging process

UR - http://www.scopus.com/inward/record.url?scp=85205348624&partnerID=8YFLogxK

U2 - 10.1007/s12008-024-02119-z

DO - 10.1007/s12008-024-02119-z

M3 - Article

AN - SCOPUS:85205348624

VL - ??? Stand: 27.Jänner 2025

JO - International Journal on Interactive Design and Manufacturing

JF - International Journal on Interactive Design and Manufacturing

SN - 1955-2513

IS - ??? Stand: 27.Jänner 2025

ER -