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Design, functions and field of application
Operating element of submersible progressive cavity pump is made up of stator and metal screw.
Clearance – tightness between these parts and type of rubber shall be selected according to a certain operating conditions based on the questionnaire completed by customer.
Questionnaire is a special approved form of "Questionnaire for the selection of PCP system ".
PCPs may be of two designs: ordinary PCP and tandem PCP.
Ordinary PCP contains operating element, flexible and intermediate shafts, supporting module.
Tandem PCP includes two operating elements of different executions (left and right spiral) ensuring double production compared to ordinary PCP.
PCPs are designed for the production of viscous oil.
Pumped-out fluid is made up of oil, associated water and gas.
Features of pumped-out fluid:
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Associated water content at pump intake, % |
not more than 99 |
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Density, kg / m3 |
not more than 1400 |
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PH of associated water |
6,0…8,5 |
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Solids concentration, g / l |
not more than 0,8 |
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Micro-hardness, Moos |
not more than 5 |
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Free gas content at pump intake, % |
not more than 50 |
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Concentration of Hydrogen sulfide, % |
not more than 6 |
| Maximal cinematic viscosity of single-phase fluid that ensures stable pump operation without drop of head and efficiency, m2 / s |
1·10-3 |
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Temperature,°F (°C), depending on the execution |
table 1 |
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Table 1
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Design of pump |
Features of pumped-out fluid |
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Viscosity m2/s, not more than |
Temperature range, °F (°Ñ ) |
A |
4*10-4 |
Up to 104 (40 ) |
V |
6*10-4 |
105 (41) to 176 (80) |
C |
1*10-3 |
177 (81) to 266 (130) |
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Encryption of the pump coding
XÕXX Type of pump design:
EOVN - ordinary PCP
EVN - tandem PCP B Manufactutured by Borets X Pump size group X Capacity, m3/day ÕXXX Nominal head, m ÕÕÕ Design of PCP depending on the features of fluid
Examples of reference designation of PCPs used for placing orders and in business letters:
EOVNB5-4-1200À - Electrical submersible ordinary progressive cavity pump, manufactured by Borets LLC, 5 (406 series) size group, capacity is 4 m3/day, head is 1200 m, design of PCP depending on the features of fluid - A.
EVNB5-8-1500V - Electrical submersible tandem progressive cavity pump, manufactured by Borets LLC, 5 (406 series) size group, capacity is 8 m3/day, head is 1500 m, design of PCP depending on the features of fluid - V. |
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