English

Vol. 8 4, 2018 p 407-411

Pages

Article name, authors, abstract and keyword

407-411

Problems of high-viscosity oil accounting using turbine flowmeter

Alexander Y. Lyapin a, Rustem R. Nurmukhametov b

a Transneft North, JSC, 2/1 A. I. Zeryunov prospect, Ukhta, 169313, Russian Federation
b All-Russian Research Institute of Flow Metering, 7A Vtoraya Azinskaya Str., Kazan, 420088, Russian Federation

DOI: 10.28999/2541-9595-2018-8-4-407-411

Abstract: When measuring the amount of oil using turbine flow transducers in an information processing system (IPS), a calibration curve in the form of constant coefficients in the flow sub-range is traditionally used. This does not always fully contribute to the stability of the metrological characteristics of turbine flow transducers at a change in the oil viscosity, density, temperature, etc. In addition to the above calibration curve in a IPS, it is possible to use a calibration curve in the form of piecewise linear approximation, a polynomial of the second degree of the dependence of the conversion coefficient on the flow rate, or a piecewise parabolic approximation of the dependence of the conversion coefficient on the f/ν ratio. The article is devoted to the analysis of the possibility of applying a calibration curve in the form of piecewise parabolic approximation for turbine flow transducers under conditions of oil viscosity change within an IPS. It is established, that a calibration curve in the form of piecewise parabolic approximation can expand the calibration curve in the viscosity range from 28 to 68 cSt without re-routing of the turbine flow transducers and obtain more stable metrological characteristics of the turbine flow transducers in the intertesting interval. This solution, which does not require significant financial and time input, looks more preferable than switching to mass flow converters, conducting exceptional verifications or changing the description of the type of CQCS.

Keywords: viscosity, calibration characteristic, error, turbine flow transducers, piecewise parabolic approximation.

For citation:
Lyapin A. Y., Nurmukhametov R. R. Problems of high-viscosity oil accounting using turbine flowmeter. Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktovScience & Technologies: Oil and Oil Products Pipeline Transportation. 2018;8(4):407411. DOI: 10.28999/2541-9595-2018-8-4-4-407-411.

References:
[1] Vasserman B. Y. Exploration of hydrocarbon resources of the Timan-Pechora oil and gas province at the beginning of the XXI century. Oil and Gas Geology. 2001;(2):26. (In Russ.)
[2] Miloserdov E. E., Nikolaev A. O. Factors affecting operation of oil metering units and methods for their elimination. Paper presented at the 6th All-Russian Scientific and Technical Conference of Students, Graduate Students and Young Scientists Youth and Science 2010. Krasnoyarsk: Siberian Federal University Publ.; 2011 [accessed 2018 February 05]. http://elib.sfu-kras.ru/handle/2311/3365. (In Russ.)
[3] Kravchenko V., Rikken M. Flow rate measurements using Coriolis flowmeters in cases of a two-phase flow. Control Engineering Russia. 2006. October [accessed 2018 February 01]. URL: http://controlengrussia.com/programmnye-sredstva/izmerenija-raskhoda-s-pomoshchju-koriolisovykh-raskhodomero/. (In Russ.)
[4] Dvorkin V. I. Intralaboratory quality control. Organization of stability control and assessment of the performance measurement process. Industrial Laboratory. 2011;77(6):6068. (In Russ.)
[5] Panfilov S. A., Savanin . S. Analysis of the influence of reliability and stability of metrological characteristics of measuring instruments on the verification interval. Polzunovsky Vestnik. 2013;(2):277280. (In Russ.)
[6] Fatkhutdinov A. S., Slepyan M. A., Zolotukhin E. A., Fathutdinov T. A., Kolvertnov G. Y. Automated accounting of oil and oil products in the course of collection, transportation, and refining. A manual for metrologists. Ufa: Nefteavtomatika Publ.; 1999. P. 7382. (In Russ.)