SU1406359A1 - Liquid pumping apparatus - Google Patents

Abstract

The invention relates to the oil and gas industry and allows to increase the reliability of operation of the device in open hole wells. The device includes a housing 1 with annular partitions 2, mounted in case 1 a rod 3 with a saddle, upper 4 and lower 5 pistons, forming with working partitions 2 a working chamber (K) 8 and upper 6 and lower 7 power K. They are communicated by radial channels 14 in the housing 1 with annular space

Description

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Ibom and mounted in the stem wall respectively above and below the saddle. Channel 14 communicates with the annular space | the piston cavity K 6, and K 8 communicates through the suction 13 | And the pressure 12 valves installed in the wall of the rod 3, respectively (above and below the saddle. And I channel 14 communicates with the annular jCTpaHCTBOM pro-piston cavity 15. | Under the action of overpressure

rod 3 with pistons 4 and 5 is moved down. Fluid from K 6 and 7 is forced into the annulus. By increasing the volume of K 8, a suction of the formation fluid is provided. When relieving pressure, rod 3 rises, and K 6, 7 are filled with fluid from the annulus. The reservoir fluid is displaced from K 8 into the cavity of the rod above the saddle 11. 1 sludge.

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The invention relates to the oil and gas industry, and specifically to devices for testing wells by inducing an influx from the plastic into the cavity of the pipe string.

The purpose of the invention is to increase the reliability of operation of the device in non-cased wells.

I The drawing shows the device cut.

The device for pumping a liquid comprises a housing 1 with annular partitions 2, mounted in the housing I a rod 3 with an upper 4 and lower 5 pistons forming with the septa: the upper 6 and lower 7 power AND 8 working chambers, front 9 s sensor 1, lowered into the well (not shown) on the cable 10, the saddle 11, made in the rod with the possibility of installing a projectile, pressure 12 and 13 suction valves installed in the wall of the rod, respectively above and below the saddle. In the device case there are radial channels 14, which connect the lower power chamber and the sub piston cavity 15 of the upper power chamber with annular space (not shown). The body also has a sub 16 for connecting the device to a drill string (not shown) and a sub 17 for connecting the device to a packer assembly (not shown).

The device for pumping liquid works as follows.

The device is lowered into the well on the drill pipe without projectile 9 with a packer assembly attached

to the lower sub 17, while the rod 3 due to the imbalance of the forces acting on it, is in its extreme upper position. After opening the interval under test, drilling is suspended, the well is washed and packaged. Next, a hole d 9 with sensors, which is mounted in the saddle 11, is lowered into the well on the cable 10.

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After installation of the projectile in the pipe string, an overpressure is created, under the action of which the rod 3 with pistons 4 and 5 is moved to the extreme lower position. At the same time, the volume of the force chambers 6 and 7 decreases and the liquid from them through the radial channels 14 is displaced into the annulus, and the volume of the working chamber

5 8 is increased, and under the action of the resulting vacuum, the produced fluid is sucked into the working chamber through the suction valve 13.

0 Next, the overpressure in the pipe string is removed and the rod 3 with pistons 4 and 5, due to the imbalance of the forces acting on it, moves to the uppermost

5 position. At the same time, the force chambers 6 and 7 are refilled with fluid from the annular space, and the reservoir fluid is forced out of the working chamber 8 through the Kjranan 12 supercharger into the stem cavity above the saddle 1.

Subsequently, the liquid is pumped out in the sequence indicated above. In the process of pumping fluid, current reservoir parameters information is transmitted from the projectile 9 with sensors via cable 10 to the surface.

Claims (1)

Invention Formula A device for pumping out a fluid, comprising a housing with annular partitions, a stem installed in the housing with upper and lower pistons forming a working chamber with upper walls and an upper chamber and the BOTTOM power chambers communicated by radial channels 1406359 lams in the housing with annular space, projectile with sensors, suction and discharge valves that communicate the working chamber with the internal cavity of the stem, about a hl and h and higher reliability of the device in open boreholes, it provided with a seat made in the rod with the ability to install a projectile in it and move the rod during pressure above it, with the pressure and suction valves installed in the stem wall respectively above and below the saddle, and the radial channel of the upper force chamber communicates with the annular space podporshnevuyu cavity.