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Solid phase motion in intermittent vertical flow

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 28 July 2014

Published on 13 August 2013

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Authors:

N.T. Filimonenko, Cand. Sci. (Tech.), State Higher Educational Institution “Donetsk National Technical University”, Senior Lecturer of the Department of Technology and Techniques of Prospecting, Donetsk, Ukraine

A.A Kozhevnikov, Dr. Sci. (Tech.), State Higher Educational Institution “National Mining University”, Professor of the Department of Technology Prospecting of Mineral Deposits, Dnipropetrovsk, Ukraine

Abstract:

Purpose. To substantiate the implementation of the most important function of drilling fluid, bottomhole cleaning and sludge removal by rising current during intermittent irrigating of drill hole by means of submersible vacuum displacement pumpset. We already have scientific substantiation of this possibility only for stationary flow. The influence of the intermittent flow on the process of solids content carrying and its localization in the well hydraulic circuit is poorly studied.

Methodology. The research is based on the fundamental principles of the theory of solids content transportation by vertical flow of fluid. The study provides for determination of correlation between the process of sludge removal by rising intermittent current and operating parameters of the submersible vacuum pumpset.

Findings. We have formulated the criteria for rising intermittent current solids content division on two parts, sedimentating and carried up, by fractions and by stream length. We have proved that the sludge formed at the end of the active stage of the first operation cycle of the submersible vacuum pumpset will be carried up during subsequent active stages. Thus, the sludging-up of well does not appear during its irrigation with implementation of submersible vacuum pumpset.

Originality. For the first time we have determined the functional connection of the intermittent flow solid content fractions fineness and parameters of the carrying flow and submersible vacuum pumpset operation cycle.

Practical value. The possibility of application of the promising technology of pulse well irrigation by means of submersible vacuum pumpset appears. It can reduce costs of the drilling operations followed by the fluid loss.

References:

1. Криль С.И. Критические режимы гидравлического трубопроводного транспорта твердых материалов / С.И. Криль // Гидромеханика. – 1992. –Вып. 45. – С. 88–94.

Kril, S.I. (1992), “Critical behavior of hydraulic pipeline transportation of hard materials”, Gidromekhanika, Issue 45, pp. 88–94.

2. Филимоненко Н.Т. Методическое пособие по расчету параметров рабочего цикла пульсационного насоса и технологии бурения с его применением / Филимоненко Н.Т.  – Донецк: Изд-во „Вебер“ (Донецкое отделение), 2009. – 70 с.

Filimonenko, N.T. (2009), Metodicheskoye posobiye po raschetu parametrov rabochego tsykla pulsatsyonnogo nasosa i tekhnologii bureniya s ego primeneniyem [Operating Instructions on Calculation of Pulsating Pump Operational Cycle Parameters and Drilling Technology with Its Application], Veber, Donetsk, Ukraine.

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2014-07-24  350.68 KB  856

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