SU1430498A1 - Arrangement for setting a patch in well - Google Patents

Description

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The invention relates to the operation of wells, namely, devices used in; 1 l overlap of damage to the casing or industrial fluid treatment zone.

The purpose of the invention is to simplify the design of the device and the technology of its use in the well.

FIG. 1 shows a device tO: for installing a plaster in a well in the transport position; in fig. 2 - the same, when installing the plaster in the | saddle column; in fig. 3 - the same, after unpacking and partial pen-15 | down the device; in fig. 4- the same, with the final installation of the patch in the casing.

The device for installing plastigr in the well (Fig. 1) consists of a composite body 20, a packer element 2 rigidly fixed with an upper end to the body with a crimping mandrel 3. A lower end of the packer; the element is rigidly fixed with a 25 crimping mandrel 4 on step sleeve 5, movable relative to the housing 1. The internal cavity of the housing is blocked by a plug 6, between

the body of the sleeve 7 is located 7. In the through radial (holes) grooves 8, plugs 6 are placed

 9, interacting with the sleeve; 7 by means of springs 10. The sleeve 7 is telescopically interconnected with the lower 35 movable end section of the packer element with the help of rod 11. The plaster 12 is delivered to a predetermined wellbore interval or into the casing interval 13 for germatization 40 of the hole 14 on the string for - pine-compressor pipes connected to housing 1.

FIG. 1-4, the valve located above, through which the inner cavity of the tubing string is filled and emptied, and the second packing unit of the device for installing 50 a patch of arbitrary length in one cycle of its deformation by excessive internal pressure, when the end

Gshastigr parts are deformed by two sealing elements, and the middle part by liquid through a valve.

The device for the installation of the reservoir in the well works as follows.

After the device is lowered with a plaster 12. An internal pressure is created in the device through the tubing string at a predetermined interval of the casing 13. When creating a calculated excess internal pressure, the packer element 2 deforms into the region of large plastic deformations a part of the patch 12, pressing the latter; to the casing 13. The movable lower end portion of the packer element 2 together with the stepped sleeve 5 will move upwards and, therefore, the sleeve 7 will also move up telescopically connected to the movable end section of the packer element by means of the rod 11. The excess internal pressure in the tubing string is discharged and the device is moved down (see FIG. 3) so that the packer element 2 is located in the interval of the undeformed ring section patch 12. Step sleeve 5 with the bottom end section attached to it 2 and connected to it, the ha 11 will move freely downwards, and the sleeve 7 will move downward until it interacts with the bottom end with the stops 9. The plate 12 is held in the column 13 due to residual plastic deformations, providing their required contact stress between the adhesive and the casing. When the estimated excess internal pressure is re-created in the device (see FIG. 4), the packer element 2 deforms the lower end portion of the patch 12 to the inner surface of the casing 13. After the excess internal pressure in the tubing string has been released, the device is removed from the well and prepared the descent and installation of the next plate.

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Claims (1)

DEVICE FOR INSTALLING A PLASTER IN A WELL, comprising a hollow body with through radial holes and at least one packer element mounted on it, an expandable patch and a patch fixation unit containing a sleeve and spring-loaded stops interacting with it, characterized in that, in order to simplify the design devices and technologies of its use ·? Bani, in the well between the plug and the outer surface of the housing an annular gap in which a sleeve assembly fixation plaster _f wherein a cap is provided with through radial openings to accommodate the stops, and the lower end of the packer element is mounted for limited axial movement and contact with the hub fixing assembly plas- § cap on the lower end of the housing, tyry. fie. ( C £ ABOUT