SU1204700A1 - Intermittent gas-lift installation - Google Patents

Description

The invention relates to oil production, in particular, to installations for the periodic operation of gas lift wells.

The purpose of the invention is to simplify the design of the installation and to expand the range of operation of the working gas-lift valve due to its inclusion with small columns of liquid in the column of lift pipes,

Figure 1 shows the installation; figure 2 - presents the layout of the working gas-lift valve in an enlarged view.

The installation consists of a check valve 1, a packer 2, a replacement chamber 3, a gas-lift operating valve 4 assembly, gas-starting starting valves 5 and lift 6,

The working gas-lift valve assembly consists of the borehole chamber 7, the backbone chamber 8, the seat 9, the ball-bolt 10, the check valve I1f of the I2 tube connecting the cavity 3 under the working valve with the wellbore chamber 14, on the side surface of which bottom-: below 15 and top 16 holes, and the bottom of the institute’s end is plugged and has a limiter two. 17, float 18, channel 19 in the tubing string, seals 20, partitions 21 and holes 22,

The device works in the following way.

As the fluid enters, the level in the replacement chamber 3 increases, and when the float 18 reaches, the latter pops up, abates against the accumulation chamber and closes the lower opening 15 and channel 19, while due to the cessation of the passage of gas through the tube 18, the pressure in the cavity above the partition 21 gradually increases and, acting on the bellows 8, denotes the ball 10 from the seat 9, and the gas from the annulus through the side openings 22 in the valve body, the check valve fitting 11 enters the replacement chamber 3 through the pipe 12, when displacing STIs in lifts 9 pipes due to local gvdrav1204700

pressure resistances in the replacement chamber 3 and the lift pipes 6 at the level of the channel 19, which helps to keep

I Psesh Bka is in the upper position, i.e. the lower opening 15 and the channel 19 remain closed. After complete displacement of fluid from the displacement chamber into the lift tubes, when gas breaks through into them, the local hydraulic resistance decreases sharply 1 due to the replacement of fluid with gas) and the gas pressure in the lift tubes and the replacement chamber

IS is the same and because of this the float is lowered onto. limit the passage through NNK of Eur 15 and into channel 19. At the same time, the main mass of ha, enters the lift

20 pipes through their lower end and only a small amount (less than IZJ passes through channel 19, so the flow area of this scum is 10 to 13 times less than the flow width; -....

25 formed between shliksich SL .- ,. by saddle 9, After the release -, the adkostk gas outflow rate from the lift pipes to the surface increases sharply, becoming more postulent

3Q it through the reverse AND valve, as a result of which the pressure in the chamber

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Replacement of 3 decreases, to under the day gas in the bellows 3, the ball E is blocked off the saddle 9d, and ;; ITOO COS --- pretty gas. When filling with gas, gas from the chamber is replaced; It is forced into the elevator pipes through channel 19, while gas 5 entering the replacement chamber 3 through the bottom 15 and ayrh: it, 1b holes, free passage :: - yy through channel 19, does not increase .51 pressure s; the cavity over the septum 21 ,,, t aK as the Bepiotaro lphodochny section of the holes 16 is less than sa: Gev: i ;;; and; I have holes 15 and the channel 19 about ilpH which accumulates: - dco. :: t ;: / in the camcorder, the accumulation of iiene; Kp ;; ieieeT is a 15-hole hole 15 kz; & 3, the throat in the cavity above the overlap: th 2: rises and depresses: Kpp) from the ball of the ball 10 from the seat; 9, -YuB-etsk in the Oksaknom ggsr dke,

Replacement of 3 decreases, to under the day gas in the bellows 3, the ball E is blocked off the saddle 9d, and ;; ITOO COS --- pretty gas. When filling with gas, gas from the chamber is replaced; It is forced into the elevator pipes through channel 19, while gas 5 entering the replacement chamber 3 through the bottom 15 and ayrh: it, 1b holes, free passage :: - yy through channel 19, does not increase .51 pressure s; the cavity over the septum 21 ,,, t aK as the Bepiotaro lphodochny section of the holes 16 is less than sa: Gev: i ;;; and; I have holes 15 and the channel 19 about ilpH which accumulates: - dco. :: t ;: / in the camcorder, the accumulation of iiene; Kp ;; ieieeT is a 15-hole hole 15 kz; & 3, the throat in the cavity above the overlap: th 2: rises and depresses: Kpp) from the ball of the ball 10 from the seat; 9, -YuB-etsk in the Oksaknom ggsr dke,

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Claims (1)

INSTALLATION OF A PERIODIC GAS LIFT, including a column of elevator pipes, a packer, a replacement chamber with a receiving valve, start-up gas-lift valves and installed in the borehole chamber, a working gas-lift valve containing a shutter and a seat, the cavity under which is connected to the replacement chamber, characterized in that, for the purpose of simplifying the design of the installation and expanding the operating range of the working gas-lift valve due to its inclusion with small columns of liquid in the column of lift pipes, the installation is equipped with a tube plugged at the bottom, on the lateral surface of which there are upper and lower openings for communicating the borehole chamber with the annulus and the substitution chamber, and a float installed on the tube inside the substitution chamber, and in the lift pipe string a channel is made that hydraulically couples its internal cavity to the substitution chamber, and the float is installed · With the possibility of simultaneous overlapping of the specified channel and the lower hole of the tube. and „.1204700