SU1413239A1 - Deep-pumping unit - Google Patents

Abstract

Invention m. used in mechanized oil production. The purpose of the invention is to reduce metal consumption and energy costs. In the well 1 in the lower part of the column 2 tubing is the cylinder 3 submersible pump. At the mouth 4 a flow plunger 6 with a pressure valve 7 is kinematically connected with a mechanical drive 5. Under the plunger 6, a working chamber 8 is formed. from the annulus 11 by the packer 12. The chamber 8 communicates with the space 11 through the suction valve 13 installed in the cylinder 3 below the static liquid level and through the discharge valve 7 and the internal П 14 with the main 15. In the lower a part of cylinder 3 has an overflow opening 16. Between the valves m 13 and the plunger 6 is located the piston 17 with a hollow rod 18 with the possibility of its communication with the chamber 8. The rod 18 is provided with an annular sealing diaphragm 19 with a discharge valve 20. The diaphragm 19 is rigidly connected to the cylinder 3 With obrazovanie.ch above and below the piston 17 of the two chambers 21 and 22 of variable volume. Camera 8 communicates with space 11 through channel 23 through camera 21 and valve 20. Camera 22 communicates through opening 16 and P 10 with the atmosphere. P 10 is filled with liquid above the upper position of the plunger 6, which leads to a reduction in metal consumption for the column Shtang and the associated decrease in the cost of moving the plunger. I il. and cl

Description

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This invention relates to a technique for mechanized oil production.

The aim of the invention is to reduce metal consumption and energy costs.

In the drawing, an example of a deep-pumping installation is shown.

The downhole pumping unit contains a cylinder 3 of a submersible pump in the well 1 in the lower part of the column 2 of the tubing, which houses a mechanical drive 5 which is mounted kinematically with a mechanical actuator 5 installed at the wellhead 4 of the mechanical drive 5 with a discharge valve 7 .vi under the plunger 6 of the working chamber 8.

Coaxial column 2 tubing in the well 1 razmep 1, ene to ad-. A stubborn column of 9 pipes with the formation of an annular cavity 10 between them, which is isolated in the lower part from the annulus 11 by a packer 12.

The working chamber 8 communicates with the annular space 11 through the suction valve 13 installed in chi, chindra 3 below the static level of the pumping fluid. Fluid and through the pressure valve 7 of the plunger 6 and the internal cavity 14 of the column 2 tubing - glove line 15.

In the lower part of the cylinder 3, a bypass hole 16 is made, and between the suction valve 13 and the plunger 6 there is a piston 17 with a hollow brush 18 mounted on the side of the plunger 6 with the possibility of its communication with the working chamber 8 and provided with an annular sealing diaphragm 19, having an additional nipple valve 20.

The diaphragm 19 is rigidly connected to the cylinder 3 with the formation above and below the piston 17 of two chambers 21 and 22 of variable volume.

Plunger 6 is located in cylinder 3 of the static level of the pumped liquid.

The working chamber 8 communicates with the annular space 11 by means of a bypass channel 23 through the upper chamber 21 of variable volume and an additional discharge valve 20.

The variable volume chamber 22 is communicated through the overflow port 16 of the cylinder 3 and the annular cavity 10 with the atmosphere, and the annular cavity 10 is filled with a liquid (not shown) above the level of the extreme upper position of the plunger 6.

Deep pump installation works as follows.

Before starting the installation, the inner cavity 14 of the column 2 of the tubing and the annular cavity 10 is filled with liquid, the latter being filled with liquid

above the level of the extreme upper position of the plunger 6, the internal cavity 14 of the column 2 of the compression-compressor tubes above the plunger 6 is connected to the discharge line 15, and the plunger 6 is in its dead position.

As the plunger 6 moves upward, the discharge valve 7 closes, while the pressure acting on the piston 17 from the side of the lower chamber 22 of the variable

0, due to a decrease in pressure in the working chamber 8, the pressure from the upper chamber 21 of the variable volume becomes less, and the piston 17 in the cylinder 3 moves upwards but with the plunger 6.

When moving up to the bottom 17, the pumped liquid is displaced from the upper chamber 21 of variable volume through the additional discharge valve 20 into the working chamber 8 with the closed suction valve 13 and the liquid enters the lower chamber 22 of variable volume from the annular cavity 10. After reaching the plunger meter 6 its extreme upper position changes the direction of movement of the plunger 6 in the cylinder 3, while the discharge valve 7 opens, the liquid from the working chamber 8 flows into 6, the internal cavity 14 of the column 2 of pump-compressor pipes, the pressure acting on the piston 17 from the bottom chamber 22 of the variable volume, due to an increase in pressure in the working chamber 8 and a decrease in the level of liquid in the annular cavity 10 becomes less than the pressure from the upper chamber 21 variable volume, resulting in the movement of the gun 17 in the cylinder 3 down together with the plunger 6.

When the piston 17 moves downward, the pumped liquid enters the upper chamber 21 of variable volume through the suction valve 13 when the additional valve 20 is closed and the liquid is expelled from the lower chamber 22 of variable volume into the annular cavity 10,

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The height of the possible location of the plunger 6 above the static level of the pumped liquid in the well 1 is mainly determined by the depth of operation of the well 1, its bottom hole pressure, diameter of the main and additional columns 2 and 9, the height of the annular cavity 10 and the condition of ensuring the continuity of the column of the pumped liquid in working chamber 8.

The location of the plunger above the static level of the pumped liquid in the first place leads to a decrease in the metal consumption by Ko. ioHHv rods and related.

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this reduction in the energy costs of moving a punger with a column of rods,

Claims (1)

Invention Formula At the bottom of the cylinder, there is a design hole, characterized in that, in order to reduce metal consumption and energy costs, the installation further comprises a hollow rod piston located in the cylinder between the suction valve and plunger, mounted on the plunger side with the possibility of its communication with a working chamber, equipped with an annular sealing di-Depth-pump unit, containing a cylinder of a submersible pump located in the well in the lower part of the tubing string, the valve is placed kinematically connected with a mechanical fragment installed at the wellhead, which has an additional blower-driven flow plunger with a pressure claian, and the diaphragm is a rigid valve to form an iodine plunger connected to the cylinder to form rum of the working chamber, and placed in a well over and under the piston of two alternating chambers the pump is compaxially coaxial to the column, the ilunger is located in the cylinder spring pipes an additional column 15 is above the static level of the pumped pipe to form a ring-liquid between them, the working chamber communicates with the packer, which is isolated in the lower part from the annulus by a packer, and the working chamber communicates with the annular the tube space through the bypass channel through the upper chamber of variable volume and the additional discharge valve of the diaphragm, the lower chamber of variable volume communicates through the cylinder bypass hole and the annular cavity with the atmosphere, and the annular cavity is filled with liquid above the extreme upper position of the plunger. space through the suction valve installed in the cylinder below the static level of the pumped liquid and through the discharge valve of the plunger and the internal cavity of the tubing string - with the discharge line, and in the lower part of the cylinder there is a progressive hole, which is designed to reduce metal consumption and energy costs, the installation additionally contains a piston with a hollow rod located in the cylinder between the suction valve and the plunger; with the possibility of communication with the working chamber, equipped with an annular sealing diaphragm having an additional injection claian, and the diaphragm of the gesture 0 the tube space through the bypass channel through the upper chamber of variable volume and the additional discharge valve of the diaphragm, the lower chamber of variable volume communicates through the cylinder bypass hole and the annular cavity with the atmosphere, and the annular cavity is filled with liquid above the extreme upper position of the plunger.