SU1640376A1 - Displacement gas lift - Google Patents

Abstract

The invention relates to the technique of oil extraction and is intended to install a periodic gas lift. The purpose of the invention is to increase efficiency by reducing the consumption of the working agent. The elevator contains a replacement chamber (K) 1 with elements for communication with the shank 2 and the column 3 of elevator pipes equipped with starting valves 4 , sequentially placed at its height, the packer 5, located on the shank 2 under K 1, the operating start-up and - improving the efficiency by reducing the consumption of the working agent. The drawing shows the replacement lift equipment circuit. The replacement lift for periodic operation of gas-lift wells is a social valve 6 located above the pack 5 below K 1, check valves 7 and 8, one of which is placed in the shank 2 under the working starting valve 6, and the other in K 1 above the working starting valve 6 "The elevator has concentrically located in the upper part of K 1 and connected 9 hydraulically connected to the column 3 elevator pipes 10 openings for the passage of the well production and with the saddle 11 under it. The check ball valve 8 is interoperable with the saddle 11 and forms an annular gap for the passage of the production of K 1 replacement well into the column 3 of lift pipes When filling K 1 with production of a well, gas from the annular space through the working starting valve 6 enters K 1, raises the ball up to the stop 8, the saddle 11 and displaces the liquid through the radial holes 10 to the surface “After lifting the entire liquid column, the pressure in K 1 decreases, the ball starts up, accumulation mode begins. Then the process is repeated 1 silt; whale replacement chamber 1 with elements for connection with tail 2 and column 3 of lift pipes, equipped with starting valves 4, successively placed along its height, park 5, placed on the shank 2 under the replacement chamber 1, the operating starting valve 6, located above the packer ohm 5 under the replacement chamber 1, check valves 7 and 8, one of (A)

Description

which is located in the shank 2 under the working starting valve 6, and the other in the replacement chamber 1 above the operating inlet valve 6. Replacement lift. Also provided concentrically located in the upper part of the replacement chamber 1 and hydraulically communicated and connected to the column 3 of elevator pipes 9 with radial orifices 10 for the passage of production of the well and with a saddle; 11 beneath it; the check ball valve 8 is installed with the possibility of interaction with the saddle 11 and forms an annular gap for the passage of the production of the well from the replacement chamber 1 in column 3 lift pipes „

The replacement lift works as follows.

After the device is lowered into the well, the annular space is filled with a working agent, and the products coming from the reservoir through the check valve 7 accumulate in the replacement chamber 1, creating hydrostatic pressure due to the height of the liquid column on the working start valve 6 "Then the latter opens and the gas passes from the annular space into the replacement chamber 1, takes with it a hollow ball of the check valve 8, which acts as a piston when it moves upwards along the replacement chamber 1 and displaces the liquid in the lift column 3 In this case, the working agent has flow around the hollow ball of the valve 8, creates turbulence in the fluid flow between the wall of the replacement chamber 1 and the hollow ball, and forces the 3 lift pipes flowing down the column 3 upwards when the hollow ball 8 reaches the seat 11, it closes it. The working agent passes through α-radial orifices 10 into the column 3 of elevator tubes and forces the liquid to the surface. The displacement of fluid from chamber 1 into the column of elevator pipes occurs at a speed of 1.2-1.5 m / s. When the entire liquid column from the elevator pipes 3 is displaced into the discharge line, the well goes into the purge mode, the pressure inside the column 3 drops, and the operating start valve 6 closes, therefore, a period of accumulation occurs. 0 When the hydrostatic pressure of the liquid column accumulated in chamber 1. becomes greater than the setting pressure of working start valve 6, the latter opens and the cycle repeats

Claims (1)

Invention Formula Replacement elevator for periodic operation of a gas-lift well containing a replacement chamber with elements for communication with a shank and with a string of lift pipes, equipped with starting valves, sequentially placed along its height, a packer placed on the shank under the replacement chamber, a working starting valve located above the packer under the replacement chamber, non-return ball valves, one of which is located in the shank of iodine by the working starting valve, and the other in the replacement chamber above the working starting valve, differing that, in order to increase the efficiency of its operation by reducing the consumption of the working agent, it is provided with a radial orifice nozzle with a radial bore for transporting the well and a saddle below it, concentrically placed in the upper part of the replacement chamber , wherein the check ball valve is installed with the possibility of interaction with the saddle and forms an annular gap for the passage of production of the well from the replacement chamber to the tubing string "