SU1397624A1 - Pump unit - Google Patents

Abstract

The invention relates to pump construction and m. used in downhole oil production. The purpose of the invention is to increase the efficiency of the pump. The cylinder 4 of the actuator is located inside the cylinder 12 of the pump 2 with the formation of a variable obg camera over the working unit 10 of the chamber 17. The injection cavity (NP) 13 communicates with the production channel 7 through the discharge valve 15 installed in the piston and the chamber 17. When the porgans 10 and 3 move together, the volume of the NL changes. As a result, the pumped liquid is either squeezed into the discharge line 9 from the petroleum pipe, or flows into the chamber 17. I Il.

Description

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The invention relates to a pump engineering technique and can be used, in particular, in downhole pumped oil production.

The aim of the invention is to increase efficiency.

The drawing shows a schematic diagram of a pump installation.

The pumping unit contains an installed Novy in the lower part of the column 1 of pipes of a hydraulically driven submersible pump 2, the drive piston 3 of which is located in the pilot saw 4 of a drive with the formation of a perportaveous drive cavity 5 and a sub piston cavity 6 of the battery, and the over piston drive cavity 5 is hydraulically communicated through the productive channel 7 with a periodic pressure source 8 and through a switching element (not shown) with a discharge line 9.

The working piston 10 is connected by a rod 11 with a driving piston 3 and is located in the pump pilin 12 with the formation of the discharge cavity 13 communicated through the suction and discharge valves 14 and 15 respectively with the annulus 16 and the production channel 1,

The cylinder 4 of the actuator is located inside the centrifugal 12 of the pump 2 to form a variable volume chamber 17 above the working piston, the pressure cavity 13 communicating with the production channel 7 through the discharge valve 15 and the variable volume chamber 17 installed in the working piston 10.

Pump installation works as follows.

During the period when the source 8 of a periodic pressure creates in the production channel 7 an increase in pressure, the driving piston and the working piston 10 and 3 move downward together.

The volume of the injection cavity 13 is reduced, while the suction valve 14 is closed and the injection valve 15 is opened, and the pumped liquid from the discharge cavity 13 through the discharge valve in the working piston 10 flows into the variable volume chamber 17.

At the same time there is a decrease in the volume of the piston lanes.

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these 6 batteries and the accumulation of energy of compression, for example, gaseous medium.

After the intermittent creation of pressure by the pressure source 8 in the productive channel 7 of increasing pressure ceases, the driving piston and the working piston 10 and 3 move upward using the accumulated compression energy contained in the piston cavity 6 of the medium.

The volume of the injection cavity 13 increases, while the discharge valve 15 closes and the suction valve 14 opens, and the pumped liquid from the annular space 16 flows through the suction valve into the discharge cavity 13o. At the same time, a switching element opens, for example, a limit valve (not shown), and the pumped liquid from the production channel 7 is displaced into the discharge line 9. Next, the cycle of the pump unit is repeated.

The use of the invention makes it possible to significantly increase the efficiency of a pumping unit by increasing its productivity and more efficiently using the energy of a periodic pressure source.

Claims (1)

Invention Formula Pump installation containing a hydraulically driven submersible pump installed in the lower part of the Piping, whose drive piston is located in the drive cylinder with the formation of a piston drive cavity and a battery piston cavity, and the piston drive cavity is hydraulically communicated through the production channel with a source of periodic pressure and through a switchable element - with a discharge line, the working piston is connected by a rod with a drive piston and is located in the pump cylinder with the formation the discharge cavity communicated through the suction and discharge valves, respectively, with the annulus space, and the main ventilation and productive channel, characterized in that, in order to improve the working efficiency. 313976244 The cylinder of the drive is located inside the Qi-communicated with the productive channel of the pump cylinder with the alternating pressure valve and re-volumetric valve installed in the working piston with the barrel piston of the chamber, and the discharge volume of the cylinder is installed above the section.