CN2126723Y

CN2126723Y - Exhaust oil pump

Info

Publication number: CN2126723Y
Application number: CN 92226951
Authority: CN
Inventors: 马世俊; 郑勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-10
Filing date: 1992-07-10
Publication date: 1993-02-03
Anticipated expiration: 2002-07-10

Abstract

The utility model belongs to a pump used for hoisting the crude oil from the deep place to the ground. To provide a safe oil pump with high efficiency, which is suitable for the oil well with a large fuel-gas ratio, the utility model provides an oil exhaust pump, which is composed of an upper working barrel, an exchanging barrel for gas and liquid, a lower working barrel, a piston, an upper movable one-way valve, a lower movable one-way valve and a fixed one-way valve, wherein, the internal diameter of the exchanging barrel for gas and liquid is larger than the internal diameters of the upper working barrel and the lower working barrel.

Description

Exhaust oil pump

The utility model belongs to from the depths and promotes liquid earthward, particularly promotes the pump of crude oil.

The existing pump that promotes crude oil from the depths earthward is when the big oil well work of oil-gas ratio, because the compressible gas that contains in the crude oil, greatly reduces the efficient of pump, when serious even make pump generation gas lock, cuts off oil pumping.

For a kind of high working efficiency is provided, safe and reliable, be applicable to the oil well pump of the oil well that oil-gas ratio is big, the utility model is proposed.

The utility model by last working barrel, down working barrel, piston, go up mobile one-way valve, down mobile one-way valve, fixedly one-way valve and gas-liquid switching cylinder are formed, the gas-liquid switching cylinder is between the upper and lower working barrel, and the internal diameter of gas-liquid switching cylinder is greater than the internal diameter of upper and lower working barrel.

Owing to have the gas-liquid switching cylinder of internal diameter between the upper and lower working barrel of the present utility model greater than upper and lower working barrel internal diameter, utilize the characteristic of specific gravity of gas less than specific gravity of crude, when piston moves up, the gas come-up that enters down in the gas and oil fluid-mixing in the working barrel chamber is introduced in the gas-liquid switching cylinder chamber, when piston moves down, gas come-up in the gas-liquid switching cylinder chamber is introduced into the working barrel chamber and discharges, and crude oil is discharged through upper and lower mobile one-way valve thereupon.Avoid the inefficiency of the pump that causes because of pressurized gas even cut off the generation of oil pumping situation, thereby reached the purpose of this utility model.

Fig. 1 is the utility model superstructure schematic representation.

Fig. 2 is the utility model substructure schematic representation.

Fig. 3 is fundamental diagram during piston stroking upward in the utility model.

Fig. 4 is fundamental diagram during descent of piston in the utility model.

Below in conjunction with accompanying drawing the utility model is further elaborated.

The utility model by last working barrel 1, gas-liquid switching cylinder 2, down working barrel 3, piston 4, go up mobile one-way valve 5, down mobile one-way valve 6 and fixedly one-way valve 7 form, gas-liquid switching cylinder 2 is between upper and lower working

barrel

1,3, and its internal diameter is greater than upper and lower working barrel internal diameter.Upper and lower mobile one-

way valve

5,6 is installed in the two ends of the cavity 8 of piston 4.

When piston of the present utility model 4 is up, close under the oil pressure effect of upper and lower mobile one-

way valve

5,6 in last working barrel 1, the volume of following working barrel 3 increases, pressure reduces, gas and oil fluid-mixing in the oil reservoir backs down fixedly, and one-way valve 7 enters down in the cavity 9 of working barrel 3, when the cavity 10 of gas-liquid switching cylinder 2 communicated with the cavity 9 of following working barrel 3, the gas that proportion is little was introduced in the cavity 10 of gas-liquid switching cylinder 2, made down in the cavity 9 of working barrel 3 to be full of no gas crude oil.

When piston of the present utility model 4 is descending, cavity 9 volumes of following working barrel 3 dwindle, pressure improves, fixedly one-way valve 7 is closed, mobile one-way valve 6 is opened down, crude oil enters the cavity 8 of piston 4, back down mobile one-way valve 5, enter at last in the cavity 11 of working barrel 1, when the cavity 10 of gas-liquid switching cylinder 2 communicates with the cavity 11 of last working barrel 1, the gas that proportion is little in the cavity 10 is introduced into cavity 11 interior discharges of working barrel 1, and heavy crude oil is retained in the cavity 10 of gas-liquid switching cylinder 2, for next circuit is prepared.

Claims

1, a kind of by last working barrel, down working barrel, piston, go up mobile one-way valve, mobile one-way valve and the fixing oil well pump formed of one-way valve down, it is characterized in that also having the gas-liquid switching cylinder between upper and lower working barrel, the internal diameter of gas-liquid switching cylinder is greater than the internal diameter of upper and lower working barrel.