Calculation of pressure and power characteristics on water of a tapered pump

UDK: 622.276.53
DOI: 10.24887/0028-2448-2023-12-143-146
Key words: tapered pump, negative pump head zone, electric submersible pump (ESP)operation zone, optimization of ESP operation, selection of pumping equipment
Authors: A.I. Sorokin (Novomet-Perm JSC, RF, Perm), I.V. Zolotarev (Novomet-Perm JSC, RF, Perm; Perm State University, RF, Perm), D.A. Polenkov (Novomet-Perm JSC, RF, Perm)

Optimal pumping equipment arrangement is one of the key tasks in the modern oil industry. The article considers the characteristics of a tapered pump. The conclusions are made that can be used in the selection of equipment. It is noted that the equipment is not always optimally matched to the well. Situations arise when any section of the pump starts operating outside the operating range, especially for non-standard equipment layouts such as a tapered pump. The performance of the tapered pump section in the negative pump head zone is studied insufficiently. This is the main reason for carrying out experiments and clarifying calculation algorithms. Experimental confirmation of the characteristics of a tapered pump as an algebraic sum of the characteristics of each section is provided. The authors describe a research of the characteristics of a tapered pump manufactured by Novomet-Perm, both in the positive and negative pump head zone at various frequencies. Also the operation of the upper section beyond the right boundary was analyzed. During the analysis it was found that in certain operating modes, processes occur that reduce the performance of equipment. In some situations, the deterioration of the installation increases. This type of operation is undesirable, because it leads to decrease in service life and should be avoided. The article provides recommendations on how these undesirable modes can be avoided for different frequencies and pumps.

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