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Perm’, Russia

Antipina N.A.,Novomet Perm CJSC | Peshcherenko S.N.,Perm National Research Polytechnic Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

A simulation model of workflow for submersible hydro cyclones was developed. It is established that increasing of the separation ratio k with the growthof the flow rate Q is explained by the growth of centrifugal forces acting onthe mechanical particles. Growth ends when large-scale vortices form in the area of the stream turning to 180 degrees as flow rate Q continues to increase. Therefore, the dependence k(Q) is non-monotonic in general. It is shown that separation ratio can be improved by changing the length of the vortex chamber through decreasing vortex formation in the area of flow turn. The criterion of hydrodynamic similarity for the submersible hydro cyclones is suggested. Source


Peshcherenko S.N.,Perm National Research Polytechnic Institute | Poshvin E.V.,Novomet Perm CJSC | Fadeikin A.S.,Novomet Perm CJSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

Method of workflow simulation submersible induction motors based on the Maxwell's equations solution was developed. Performance of some typical motors was calculated. Developed method allows to calculate the limits of increasing the efficiency of modern submersible induction motors by increasing the filling factor of stator slots, reducing the magnetic stator iron losses and reducing rotor-stator gap to values close to the maximum allowable. Source


Gizatullin R.R.,Novomet Perm CJSC | Poshvin E.V.,Novomet Perm CJSC | Peshcherenko S.N.,Perm National Research Polytechnic Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

Currently valve submersible electric motors find more and more application in oil recovery by vane pumps. Their advantages over traditionally used asynchronous electric motors are as follows: higher efficiency, greater range of shaft speed, higher reliability. One of the design features of the valve electric motors is the possibility of increasing the rotor - stator clearance, as it can be increased while maintaining the original strength of the magnetic field due to changes in the magnets radial thickness. Typically at electric motors calculating the empirical relationships are used, which taking into account the total mechanical losses as viscous friction in the rotor - stator clearance, and friction in the bearings. These relationships are obtained by bench testing samples of already existing electric motors. It is clear that at the design of new products these relationships can't be used. Therefore, at designing new submersible electric motors another approach is required, allowing to calculate the losses based on the supposed construction. In this paper we propose a method of numerical calculation of viscous friction losses in the rotor-stator clearance of valve submersible electric motors by means of computational fluid dynamics. The technique has been tested on three types of flows: laminar axial-symmetric, laminar Taylor and developed turbulent. The calculation of rotor - stator clearance effect on viscous losses for valve submersible electric motor PED63-117 in the frequency range from 3000 to 10000 min-1 was fulfilled. It is determined, that at frequencies up to 5000 min-1 viscous losses lead to inessential efficiency reduction (less than 0.5 %), but at high frequencies it reaches 5 %. Source


Ermakova A.S.,Novomet Perm CJSC | Poshvin E.V.,Novomet Perm CJSC | Peshcherenko S.N.,Perm National Research Polytechnic Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

The technique of selecting safe conditions of submersible motors operation, based on a simulation model of its thermal regime by the methods of computational fluid dynamics is suggested. The correspondence of calculated data to the results of the thermal bench test is shown. By means of commonly used today programs of selection electrical centrifugal pump units for wells borehole fluid properties, required for the transfer the technique on the operating conditions, are determined. Examples of the calculation of the critical speeds of the cooling fluid for a number of submersible motors are given. Source

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