SU1740622A1 - Device for protecting packer from aggressive liquid - Google Patents

Abstract

This invention relates to the petroleum industry. The purpose of the invention is to increase the reliability of the device while reducing the consumption of inert liquid and eliminate its mixing with aggressive liquid. The device contains a container 1 of concentric pipes 2 and 3, bottom 4 and cover 5, filled with an inert liquid with a specific gravity lower than the proportion of aggressive liquid. In cover 5 there is a fitting 6 with a hydraulic lock 7, and in bottom 4 a fitting 8 with a plug 9 from destructive material in an aggressive environment. After the column with the packer and the device placed below the packer is lowered, the packer is seated and a corrosive treatment fluid is pumped into the well below the packer, which dissolves the plug 9, enters the container and forces the inert liquid out of it. annular space. The ikert liquid rises under the packer and protects it from the action of aggressive liquid. 1 hp f-ly, 2 silt

Description

This invention relates to the petroleum industry.

The purpose of the invention is to increase the reliability of the device while reducing the consumption of inert liquid and eliminate its mixing with aggressive liquid.

This is achieved by the fact that the nozzle placed in the lid of the container of the device is equipped with a water seal, and an additional nozzle with an opening blocked by a stopper is placed in the bottom, the plug being made of a material destroying in aggressive liquid.

FIG. Figure 1 shows the layout of the device in the well after the packer is seated; in fig. 2 is a longitudinal section of the device

The device (Fig. 2) contains a container 1 consisting of concentric pipes 2 and 3. bottom 4 and cover 5. In lid 5 there is a fitting 6 with a hydraulic lock 7, and in the bottom 4 - fitting 8 with a stopper from a material destroying it in an aggressive environment , for example zinc, attached to the nozzle 8 by a nut 10.

The device works as follows.

Before descending, the container 1 is filled with an inert liquid, the density of which is less than the density of an aggressive liquid. The device is installed on the column below the packer and the column is lowered into the well. Gid2

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The valve 7 ensures that the pressure in the container 1 is equalized with the annular pressure, prevents the container 1 from slipping during the descent into the well and pressing the pack and premature displacement of the inert fluid with the well liquid.

After the string is lowered into the well, the packer is pumped and pumped into the well below packer 11, which, in addition to the direct destination treatment, dissolves the plug 9, enters the bottom of container 1 and displaces the lighter inert liquid through the hydraulic block 7 into the annulus. The inert fluid rises under the packer 11 into the annular space 12 and isolates the packer 11 from aggressive fluid.

Claims (2)

1. A device to protect the packer from aggressive liquid containing a container of two concentrically placed relative to each other pipes with a bottom and a lid and a fitting installed in the lid, characterized in that, in order to increase the reliability of the device while reducing consumption an inert liquid and excluding its mixing with an aggressive liquid, it is provided with a hydraulic lock placed in the lid and an additional fitting with a stopper that is installed in the bottom with the possibility plug it with a stopper. 2. Device pop. 1, characterized in that the plug is made of a material that breaks down in an aggressive liquid. AND -I am Y- - 5 1 3