The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform

Ionut Lambrescu - One of the best experts on this subject based on the ideXlab platform.

  • Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation
    Energies, 2021
    Co-Authors: Andrei Dumitrescu, Mihail Minescu, Alin Dinita, Ionut Lambrescu
    Abstract:

    Pipe corrosion is a frequent phenomenon, and if repairs are delayed it could lead to environmental damage. Drilling activities can expand only when sufficient surface transportation capacity for the produced fluids exists and thus good maintenance of the transportation system is important. Furthermore, the technology presented herein can be easily upgraded as a repair solution for surface casing section below the casing head, which have been repeatedly reported as being highly corroded for older wells. This paper presents the results of the research work carried out by the authors in order to evaluate the design methods of the Modern Composite Material systems used to repair steel pipes carrying hydrocarbons upon which local metal loss defects (generated by corrosion and/or erosion processes) have been detected. The pipe repair technologies consisting of the application of Composite Material wraps (made of a polymeric matrix and reinforcing fabric) are perceived as being advantageous alternative solutions for substituting the conventional technologies, which require welding operations to be performed in the corroded pipe areas. The performance and the design methods of the Composite repair systems have been investigated by evaluating the reinforcement effects (the restoration level of the damaged pipe mechanical strength) generated by the applied Composite wraps as a function of their geometry and mechanical properties. To that purpose, numerical models based on finite elements (previously developed by the authors and certified by comparing them with the results of several experimental programs performed within our university) have been used. The calculation methods proposed in literature (among which a method previously proposed by the authors) to define the Composite wrap dimensions (thickness and length) for a given pipe have been compared to the numerical results in order to select the most adequate solution for the design of the Composite repair system. The influence in the design process of the defect orientation and of its width has also been investigated.

Andrei Dumitrescu - One of the best experts on this subject based on the ideXlab platform.

  • Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation
    Energies, 2021
    Co-Authors: Andrei Dumitrescu, Mihail Minescu, Alin Dinita, Ionut Lambrescu
    Abstract:

    Pipe corrosion is a frequent phenomenon, and if repairs are delayed it could lead to environmental damage. Drilling activities can expand only when sufficient surface transportation capacity for the produced fluids exists and thus good maintenance of the transportation system is important. Furthermore, the technology presented herein can be easily upgraded as a repair solution for surface casing section below the casing head, which have been repeatedly reported as being highly corroded for older wells. This paper presents the results of the research work carried out by the authors in order to evaluate the design methods of the Modern Composite Material systems used to repair steel pipes carrying hydrocarbons upon which local metal loss defects (generated by corrosion and/or erosion processes) have been detected. The pipe repair technologies consisting of the application of Composite Material wraps (made of a polymeric matrix and reinforcing fabric) are perceived as being advantageous alternative solutions for substituting the conventional technologies, which require welding operations to be performed in the corroded pipe areas. The performance and the design methods of the Composite repair systems have been investigated by evaluating the reinforcement effects (the restoration level of the damaged pipe mechanical strength) generated by the applied Composite wraps as a function of their geometry and mechanical properties. To that purpose, numerical models based on finite elements (previously developed by the authors and certified by comparing them with the results of several experimental programs performed within our university) have been used. The calculation methods proposed in literature (among which a method previously proposed by the authors) to define the Composite wrap dimensions (thickness and length) for a given pipe have been compared to the numerical results in order to select the most adequate solution for the design of the Composite repair system. The influence in the design process of the defect orientation and of its width has also been investigated.

Mihail Minescu - One of the best experts on this subject based on the ideXlab platform.

  • Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation
    Energies, 2021
    Co-Authors: Andrei Dumitrescu, Mihail Minescu, Alin Dinita, Ionut Lambrescu
    Abstract:

    Pipe corrosion is a frequent phenomenon, and if repairs are delayed it could lead to environmental damage. Drilling activities can expand only when sufficient surface transportation capacity for the produced fluids exists and thus good maintenance of the transportation system is important. Furthermore, the technology presented herein can be easily upgraded as a repair solution for surface casing section below the casing head, which have been repeatedly reported as being highly corroded for older wells. This paper presents the results of the research work carried out by the authors in order to evaluate the design methods of the Modern Composite Material systems used to repair steel pipes carrying hydrocarbons upon which local metal loss defects (generated by corrosion and/or erosion processes) have been detected. The pipe repair technologies consisting of the application of Composite Material wraps (made of a polymeric matrix and reinforcing fabric) are perceived as being advantageous alternative solutions for substituting the conventional technologies, which require welding operations to be performed in the corroded pipe areas. The performance and the design methods of the Composite repair systems have been investigated by evaluating the reinforcement effects (the restoration level of the damaged pipe mechanical strength) generated by the applied Composite wraps as a function of their geometry and mechanical properties. To that purpose, numerical models based on finite elements (previously developed by the authors and certified by comparing them with the results of several experimental programs performed within our university) have been used. The calculation methods proposed in literature (among which a method previously proposed by the authors) to define the Composite wrap dimensions (thickness and length) for a given pipe have been compared to the numerical results in order to select the most adequate solution for the design of the Composite repair system. The influence in the design process of the defect orientation and of its width has also been investigated.

Alin Dinita - One of the best experts on this subject based on the ideXlab platform.

  • Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation
    Energies, 2021
    Co-Authors: Andrei Dumitrescu, Mihail Minescu, Alin Dinita, Ionut Lambrescu
    Abstract:

    Pipe corrosion is a frequent phenomenon, and if repairs are delayed it could lead to environmental damage. Drilling activities can expand only when sufficient surface transportation capacity for the produced fluids exists and thus good maintenance of the transportation system is important. Furthermore, the technology presented herein can be easily upgraded as a repair solution for surface casing section below the casing head, which have been repeatedly reported as being highly corroded for older wells. This paper presents the results of the research work carried out by the authors in order to evaluate the design methods of the Modern Composite Material systems used to repair steel pipes carrying hydrocarbons upon which local metal loss defects (generated by corrosion and/or erosion processes) have been detected. The pipe repair technologies consisting of the application of Composite Material wraps (made of a polymeric matrix and reinforcing fabric) are perceived as being advantageous alternative solutions for substituting the conventional technologies, which require welding operations to be performed in the corroded pipe areas. The performance and the design methods of the Composite repair systems have been investigated by evaluating the reinforcement effects (the restoration level of the damaged pipe mechanical strength) generated by the applied Composite wraps as a function of their geometry and mechanical properties. To that purpose, numerical models based on finite elements (previously developed by the authors and certified by comparing them with the results of several experimental programs performed within our university) have been used. The calculation methods proposed in literature (among which a method previously proposed by the authors) to define the Composite wrap dimensions (thickness and length) for a given pipe have been compared to the numerical results in order to select the most adequate solution for the design of the Composite repair system. The influence in the design process of the defect orientation and of its width has also been investigated.

Pavel V. Matyukhin - One of the best experts on this subject based on the ideXlab platform.

  • Modification of the Hematite Filling Surface of New Composition Material during High Pressure Testing
    Solid State Phenomena, 2018
    Co-Authors: Pavel V. Matyukhin
    Abstract:

    The paper presents the results of the researches on structure modifications of the surface of iron-ore hematite concentrate under the pressure up to 20000 MPa with the use of Modern research method – scanning electron microscopy. Hematite iron-ore concentrate (hematite) is the filling for the newest Composite Material which can be used in the domain of nuclear building. Such Composite Material has the same aluminum containing matrix in its base and it contains significant amount of such filling. This Modern Composite Material can be used for engineer structures that can experience high pressure even in extreme cases (fires, sharp dynamic load and strikes). The images of the surface of hematite particles under the pressure of 5000 MPa, 10000 MPa, 15000 MPa and 20000 MPa were studied.