RU97166U1 - DEVICE FOR LIFTING PLASTIC LIQUID - Google Patents

Abstract

 1. A device for raising the reservoir fluid, consisting of a casing string, an elevator string, located in the elevator string of the accumulation chambers and check valves located at the bottom of the accumulation chambers, diaphragm pumps, each of which includes a pump chamber, an auxiliary chamber and an elastic diaphragm separating them and also a check valve located at the bottom of each diaphragm pump, characterized in that it contains lines for supplying gas to the even and odd auxiliary chambers of the diaphragm agmennyh pumps, wherein one of the gas supply lines connected to the even and the other - to the odd sub-chamber diaphragm pumps. ! 2. The device for raising the reservoir fluid according to claim 1, characterized in that an end valve is installed at the lower end of the lift column to lower the pressure in the pump chamber, stabilize it and raise the reservoir fluid from the well when the gas pressure in the supply line is less than the reservoir.

Description

The utility model relates to the field of production of formation fluid from wells and can be used in the operation of water and oil pumping wells.

Known substitution elevator for the periodic operation of a gas lift well (A.S. No. 1640376). The replacement elevator also contains a replacement chamber associated with a column of elevator pipes equipped with start valves. The replacement chamber contains check ball replacement valves. The rise of the oil column occurs cyclically by periodically supplying gas from the annulus through the start-up valve at a pressure higher than the reservoir pressure. The disadvantage of this known device is the need to supply gas at a pressure in excess of the reservoir, i.e. use a powerful compressor on the surface and the need to put a packer at the bottom of the well.

The closest (prototype) invention is the "Method and device for lifting formation fluid" (No. 2282019).

The device for raising the reservoir fluid consists of an elevator column for raising the reservoir fluid, replacement chambers and check valves in the replacement chambers, characterized in that it further comprises lines for supplying gas, the elevator column along the entire height consists of even and odd replacement chambers with located above them accumulation chambers, separated from the replacement chambers by check valves. The disadvantage of this device is that there is a mixing of gas and liquid.

The purpose of the utility model is to eliminate the mixing of gas and liquid when lifting liquid from the well.

Device for lifting formation fluid, consists of a casing string and an elevator string. In the elevator column there are accumulation chambers with check valves located at the bottom of the accumulation chambers, as well as diaphragm pumps, each of which includes a pump and auxiliary chambers and an elastic diaphragm separating them. At the bottom of each diaphragm pump is a check valve. The device contains lines for supplying gas to the even and odd auxiliary chambers of the diaphragm pumps, while one of the gas supply lines is connected to the even and the other to the odd auxiliary chambers of the diaphragm pumps. At the lower end of the elevator string, an end valve is installed to lower the pressure in the pump chamber, stabilize it and raise the formation fluid from the well when the gas pressure in the supply line is less than the formation pressure.

The proposed device for raising the reservoir fluid are illustrated in the drawing.

In the casing 1 there is an elevator string 2 in which there is a device for raising the reservoir fluid, consisting of lines 13 and 14 for supplying gas to even 10 and odd 9 auxiliary chambers of diaphragm pumps. The diaphragm 11 divides the auxiliary chambers 9, 10 pump chambers 7, 8, respectively. Moreover, the pump chamber 7 is odd, and the pump chamber 8 is even. Pump chambers 7 and 8 contain a check valve 12. Above pump chambers 7 and 8, accumulation chambers 3 and 4 are located. In their lower part there is a check valve 5. At the end of the column of elevator pipes there is an end valve 15. The entire column of elevator pipes 2 is composed of sections of the same type. The number of sections depends on the depth of the well (bedding of formation fluid).

A device for lifting formation fluid works as follows. After lowering the device into the well, the formation fluid does not enter the column of lift pipes 2 due to the end valve 15 at the end of the column of lift pipes 2 and the pressure in the gas supply lines 13 and 14. When the gas pressure approaches atmospheric pressure in the odd gas supply line 13, the end valve 15 opens and the reservoir fluid through the intake check valve 12 enters the lower (odd) pump chamber 7. Upon reaching the lower odd auxiliary chamber 9 and through the diaphragm 11 in the odd pump chamber 7 pressure less than the operating pressure in the lines 13 and 14 of the gas supply, the end valve 15 is closed. Into the odd line 13 of the gas supply begins the flow of gas under pressure. The use of the end valve 15 allows pumping a column of formation fluid at a gas pressure from line 13 less than the reservoir, while lifting the column of formation fluid through the check valve 5 into the accumulation chamber 3, while the check valve 12 is closed. After lifting the column of formation fluid into an odd accumulation chamber 3, the pressure in the odd line 13 of the gas supply is brought closer to atmospheric and the formation fluid through the end valve 15 and the receiving check valve 12 again enters the lower odd pumping chamber Yeru 7, the cycle repeats. When the accumulation chamber 3 is filled with reservoir fluid, it begins to flow into the upper (even) pump chamber 8 in a similar manner, from which the reservoir fluid is pumped higher under the action of gas pressure from the even gas supply line 14. Thus, by alternately supplying and lowering the gas pressure in the gas supply lines 13 and 14, the formation fluid rises to the surface, while the pressure below the reservoir is used to raise the formation fluid through the use of end valve 15. This allows you to use gas to lift fluid from the well at low pressure relative to the pressure of the reservoir fluid. In this case, gas does not come into contact with the pumped liquid, since the auxiliary chambers and pump chambers are separated by an elastic diaphragm.

The proposed device for raising the reservoir fluid allows you to use when lifting the reservoir fluid from great depths, the pressure of the associated pelvis or a compressor of low power.

Claims (2)

1. A device for raising the reservoir fluid, consisting of a casing string, an elevator string, located in the elevator string of the accumulation chambers and check valves located at the bottom of the accumulation chambers, diaphragm pumps, each of which includes a pump chamber, an auxiliary chamber and an elastic diaphragm separating them and also a check valve located at the bottom of each diaphragm pump, characterized in that it contains lines for supplying gas to the even and odd auxiliary chambers of the diaphragm agmennyh pumps, wherein one of the gas supply lines connected to the even and the other - to the odd sub-chamber diaphragm pumps. 2. The device for raising the reservoir fluid according to claim 1, characterized in that an end valve is installed at the lower end of the lift column to lower the pressure in the pump chamber, stabilize it and raise the reservoir fluid from the well when the gas pressure in the supply line is less than the reservoir.