SU1222887A1 - Well sucker-rod pumping plant - Google Patents

Description

2. Installation under item 1, characterized in that the columns of the production and pump tubes at the wellhead are equipped with a column

one

The invention relates to a technique of oil production, in particular, to well pumping sump units, and can be used in the oil and gas industry when pumping formation fluids with high gas factors from wells.

The purpose of the invention is to increase the reliability of operation and improve operating conditions.

The drawing schematically shows a borehole pumping unit, shear, view.

The proposed installation includes a pump 1, the plunger 2 of which is connected with the column rods 3, and the cylinder 4 - with the column of pumping pipes 5, the mouth seal 6 with the faceplate 7 and the hollow piston 8 placed in the cylinder 9, with the piston cavity 10 communicated through check valves 11 and 12 with a column of pumping pipes 5 and an annular space 13 formed by columns of operational 14 and pumping pipes 5. A check valve 11 connecting the above-piston cavity 10 with the pumping pipes 5 is installed in the upper part of the piston 8 with the possibility of its blocking course after upward, and the over piston cavity 10 of the cylinder 9, the cavity of the wellhead seal 6 and the discharge line 15 are directly hydraulically connected to each other.

The installation is equipped with two additional sealed cavities 16 and 17, continuing respectively the cavities of the column of pumping pipes 5 and the annulus 13, the latter is equipped with a pipeline 18 that connects it with the cavity of the wellhead epiploon 6 above the faceplate 7, and the check valve 11 that informs the piston cavity 10 with annulus 13, installed in said pipeline 18. A check valve 19 is installed in flow line 15.

The columns of the production 14 and pump 5 pipes at the wellhead (not indicated) are provided with a column flange 20, with additional sealed cavities 16 and G / located between the column flange 20 and the faceplate 7. Pipeline 18 is one

VNIIPI Order 1687/34 Circulation 586 Subscription

Branch PPP "Patent, Uzhgorod, st. Projects, 4

flange, with additional hermetic cavity located between the column flange and faceplate.

at its end it is connected with the cavity of the wellhead gland 6 above the faceplate 7, and the other with the annular space above the column flange 20 below the faceplate 7. The rocking machine 21 serves as a drive for a well pumping unit.

The proposed borehole pumping unit operates as follows.

During the course of the balancer (not indicated)

the pumping unit 21 downwards the check valve I on the pipe 18 opens, and the check valve 19 of the discharge line 15 is closed, and from the annulus 13 gas through an additional sealed cavity 17 enters the upper part of the cavity of the pump tubes 5 above the piston 8 of the mouth gland b and an additional hermetic cavity 16. At the same time, the discharge valve (not indicated) of pump 1 and the check valve 12 in piston 8 are opened, and the formation fluid of the well (ke is shown) from the leaky cavity of cylinder 4 of pump 1 pumps c into pumping pipes 5, as well as into the over-piston cavity 10 of the cylinder 9 of the wellhead seal and then through an additional sealed cavity 16 into the discharge line 15.

During the course of the balance of the pumping unit 21 upwardly, the suction valve (not marked) of the pump I opens, and the formation fluid from the well enters the sub-piston cavity of the cylinder 4 of the pump 1.

At the same time, the discharge valve of pump 1 and check valves 11 and 12, located respectively on line 15 and in piston 8, are closed, and the formation fluid and portion of annular gas that have entered the cavity of pump tubes 5, piston shaft 10 and piston line 10. during the previous stroke of the balance of the pumping unit, they are compressed under the pressure of the upwardly moving piston 8. As a result, the check valve 19 in the flow line 15 is opened, and the mixture of formation fluid and annular gas is injected into the flow line 15 and further transported to discharge ny item of fishing where it is produced separation.

Claims (2)

1. A downhole sucker-rod installation comprising a pump, a plunger of which is connected to a rod string, and a cylinder to a pump tubing string, a wellhead stuffing box with a faceplate and a hollow piston located in a cylinder, the over-piston cavity of which is communicated through check valves with the pump tubing string and annular space formed by columns of production and pump pipes, the check valve connecting the over-piston cavity with the pump pipes installed in the upper part of the piston with the possibility of its overlap during the after upward, and the piston cavity of the cylinder, the cavity of the stuffing box and the flow line are directly hydraulically interconnected, characterized in that, in order to increase reliability and improve operating conditions, it is equipped with two additional sealed cavities that extend the cavity of the pump pipe string and the annulus, the latter is equipped with a pipe-g wire connecting it with the cavity. ⁴ wellhead seal above the faceplate, and a check valve communicating the over-piston cavity with the annulus is installed in the specified pipeline. | > 2. Installation according to π. 1, characterized in that the columns of production and pump pipes at the wellhead are provided with a column flange, with additional sealing cavities located between the column flange and the faceplate.