The company has been innovating for over 25 years. The result of which was the creation of more than 30 patented inventions that are at the stage of implementation or are successfully applied in production. The enterprise carries out research and development work on the development and manufacture of prototypes of new pumping and compression equipment, as well as work on improving or optimizing the units of machines and assemblies. New formulations of rubber compounds are being created and production technologies are being improved. Innovative technologies are being mastered, which make it possible to meet the high requirements of customers, including the implementation of import substitution.
Gerotor pump
In view of the fall in world crude oil prices, the oil companies face the challenges of the most complete extraction of hydrocarbon raw materials and reduction in the cost of production. Most of the fields in Russia have reached the late stage of development with falling oil recovery. Therefore, the technology of cluster drilling with access to horizontal wells is being developed intensively. However, the build-up rate of such wells causes problems in using the existing submersible units with centrifugal pumps with considerable length because of the low pressure of the operating stages.
The large length of submersible centrifugal pumps (ESP) and screw pumps (EPCP) does not allow to mount the pre-assembled plant (pump + electric motor), that prevents
the use of advanced tripping technologies such as coiled tubing. In addition, in case of a low-yield fund, as well as in case of wells with high viscosity, the ESP units have low energy efficiency, especially for small diameter dimensions.
Fig. 1. Section of the gerotor pump GPN4-50-2000
For this reason, the development of submersible pumping units with the following features is of relevance currently:
• high pump head per unit length;
• work capacity at low production rates, below 5 m3/d.;
• small diametrical overall dimensions;
• high efficiency in the calculated range of rotation and feed rates;
• energy efficiency for viscous media;
• ability to operate at high temperatures (up to +572 °F/+300 °C)
The most suitable type of submersible equipment that satisfies this requirements, are
volumetric pumps with metal or ceramic working bodies, are displacement pumps with metal or ceramic working bodies.
Among various designs of displacement-action pumps, are gerotor type pumps, that are most compact.
In view of the simplicity of the geometry of the working bodies of the gerotor pair of the pump, depending on the technical requirements, there is a process-related possibility for manufacturing the components of this type of pumps from various materials (metal, ceramic, polymer, etc.).
The analysis of kinematics of the gerotor profile has revealed the possibility of minimum sliding of the contacting surfaces. Using this principle the specialists of REAM-RTI LLC in cooperation with Bauman MSTU,
Ph.D. Fedorenko V.I. [1, 2] the gerotor profile of working stages has been calculated and optimized, the design has been developed and the submersible pumps GPN4-50-2000 have been manufactured [3]. The pump section of this pump consists of 4 gerotor working stages (Fig. 1). Assembly of the pump section and GPN4-50-2000 pump assembly are shown in Fig. 2.
Bench and borehole tests (Figure 3) of GPN4-50-2000 gerotor pumps have shown the working capacity of the design based on non-lubricating medium (water), the estimated production rate has been confirmed, as well as the high degree of wear resistance of the gerotor engagement profiles. Currently, the work to optimize the friction pairs of the pump is under way.
GPN4-50-2000 pumps at the pressure head of 721.78 yd/660 m section and its length only 30.7 in/
780 mm, provide a supply 10 - 80 m3/day in the rotation frequency range 10 - 50 Hz. Positive results ensure further development of the discipline of displacement pumps of the gerotor type for oil production.
