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Improving the efficiency of foamgenerating devices of pump-circulative systems of drilling sets

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Category: Mining

Last Updated on 04 August 2016

Published on 04 August 2016

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Authors:

M.M.Liakh, Cand. Sc. (Tech.), Prof., Ivano-Frankivsk National Technical University of Oil and Gas, m. Ivano-Frankivsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.М.Savyk, Cand. Sc. (Tech.), Assoc. Prof., Poltava National Technical University, m. Poltava, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

P.О.Molchanov, Cand. Sc. (Tech.), Assoc. Prof, Poltava National Technical University, m. Poltava, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Increasing efficiency of foamgenerating devices of pump-circulating systems of drilling sets. The purpose is achieved through implementation of the following tasks:

- the carrying-out of the analysis and selective choice of theoretical and experimental results, geometrical parameters, work modes of foamgenerating devices;

- the development and explanation of rational schemes of equipment strip and devices for cleaning oil and gas wells with foam.

Methodology includes:

- the analysis of conditions and experience of exploitation of different constructive peculiarities of devices and equipment of pump-circulating systems for cleaning wells with foam;

- the mathematical modelling of foam formation in ejection foamgenerating device using the laws of energy balance, flow continuity, conservation of momentum, Laplace criterion, Weber and Mach’s figures and Lishevs-kiy’s equation;

- the computing modelling of foamgenerating device was performed with the purpose of optimizing its internal constructive elements;

- the experimental definition of main parameters and work modes, considering the construction change of foamgenerating device.

Findings. Theoretical research studies has been carried out to reveal and define the influence of the most im-portant factors and optimal geometrical parameters and work modes of foamgenerating devices have been selected which provided the highest efficiency of well cleaning with foams. Experimental research studies have been carried out to define the connection between the geometrical shapes, parameters, work modes of foamgenerating devices and the efficiency of foam formation.

Originality. The theoretical and experimental research studies of fluid streaming, air and their mixture through constructive elements of the equipment allow revealing the regularities of connection of the efficiency of foam formation and parameters and work modes of foamgenerating devices.

During the research:

- connection between the quality of foam formation and constructive peculiarities of detached elements of foamgenerating device was defined;

- there were advanced mathematical models of motion streams of fluid, air and foam through constructive elements of foamgenerating device and detached elements of equipment of pump-circulating system ;

- analytic dependences of motion of fluid, air and foam streams and the work efficiency of foamgenerating devices on their constructive peculiarities were explained theoretically and experimentally;

- the method of choosing the optimal constructive shapes of elements in foamgenerating devices that influence the formation of fluid, air and foam streams has been explained scientifically.

Practical value. Due to the performed theoretical and experimental research studies, we have defined the rational geometrical shapes and parameters, set the optimal work modes of foamgenerating devices, which are the basic for creating new high efficient foamgenerating devices. We have suggested a row of methods and instrumen-talities of constructive and technological character for booming the efficiency of well cleaning with foam solution. The results have been used during the development of pump-circulating system for well cleaning with foam solution.

Reference / Список літератури

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