The Underwater Behavior of Oil and Gas Jets and Plumes

At production of pipes of type 13Cr grade steel used at development of oil and gas deposits in areas with aggressive environment, intensive wear of instrument takes place, first of all, piercing mill mandrels. Factors, influencing the resistivity of the piercing mandrels considered, including chemical composition of the material, the mandrel is made of and its design. Based on industrial experience it was shown, that chrome content in the mandrel material practically does not affect on the increase of its resistivity, since the formed thin protective oxides having high melting temperature, are quickly failed and practically are not restored in the process of piercing. To increase the resistivity of piercing mandrels at production of casing tubes of type 13Cr grade steel, a work was accomplished to select a new material for their manufacturing. The chemical composition of steel presented, which was traditionally used for piercing mandrels manufacturing, as well as a steel grade proposed to increase their resistivity. First, molybdenum content was increased, which increases the characteristics of steel strength and ductility at high temperatures and results in grain refining. Second, tungsten content was also increased, which forms carbides in the steel resulting in an increase of its hardness and “red resistivity”, as well as in preventing grains growth during heating. Third, cobalt content was also increased, which increases heat resistivity and shock loads resistivity. The three elements increase enabled to increase the mandrels resistivity by two times. Results of mandrel test of steel 20ХН2МВ3КБ presented, the mandrel having corrugation on the working cone surface, which enabled to reach the resistivity growth to 12 passes without significant change of instrument cost. Microstructure of mandrels made of steels 20Х2Н4МФА and 20ХН2МВ3КБ shown. Application of the centering pin of special design was tested, which provided forming of a rounding edge on the front billet ends, eliminated undercut of mandrel external surface in the process of secondary billet grip and increase the service life of the piercing mill mandrels. At production of seamless pipes of martensite class type 13Cr stainless steels having L80 group of strength, an increase of piercing mandrel resistivity was reached by more than four times, which together with other technical solutions enabled to increase the hourly productivity of the hot rolling section of Volzhsky pipe plant ТПА 159-426 line by more than two times.

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From accounting to report: Digitalization of college and related issues

Informatics and Education ◽

10.32517/0234-0453-2020-35-3-16-25 ◽

2020 ◽

pp. 16-25

Author(s):

D. N. Butorin

Keyword(s):

Information Systems ◽

Vocational Education ◽

Professional Education ◽

Vocational Training ◽

Oil And Gas ◽

Information Service ◽

Accounting System ◽

Educational Organization ◽

Job Tasks ◽

Digital Services

The article discusses the process of the digitalization of the educational organization of secondary vocational education. When automating routine processes, at some point, problems may arise in the transition from solving local accounting problems to submitting regulated reports. Often, digitalization becomes the only possible solution to the problems of combining the performance of job tasks based on data from various departments. This is especially evident when implementing integration with external federal information systems. The development of digital services for students with the help of the information service “NaLentu!” (”Go to a Class!”) is shown. Based on it, the mailing of the schedule, the “digital student’s record-book”, and the order of documents are implemented. It is described how one of the federal systems became the reason for the digitalization of processes in social accounting, the appointment and accrual of grants. The problems of the implementation of the accounting system on the part of employees, in particular, the perception by some of them of digitalization as a threat to their interests, are indicated. Further automation trends after the implementation of information systems in the decision of the central tasks of the educational organization are demonstrated. The stages of the introduction of information systems for accounting for vocational training and additional professional education are described, the analysis of the results of their implementation on the basis of College of Oil and Gas in Achinsk is given.

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