SU692980A1 - Packer - Google Patents

Description

I

The invention relates to devices for breaking up a well bore and eliminating absorption in the drilling of oil and gas wells.

A known packer containing a barrel with sealing elements is isolated by thin borehole 1.

However, the device does not allow for the disconnection of a borehole of variable diameter.

Also known is a packer, including a perforated pipe, a cone with dies and sealing elements, between which a spacer is installed with windows 2.

Known packer does not provide reliable sealing of the wellbore of variable diameter. The packer design provides only uniform compression of the sealing elements. If one of the sealing elements is packaged, in the case of a variable diameter well, the second sealing element may not overlap the well.

The aim of the invention is to ensure reliable sealing of the wellbore section of variable diameter.

This is achieved by the fact that the perforated pipe is provided with a sleeve disposed in the expansion pipe, over which a spring is mounted.

The drawing shows the packer.

The packer has a perforated pipe 1, a cone 2 with dies 3, sealing elements 4 and 5, between which a spacer 6 with windows 7 is installed. sealing} of the lean element in relation to which it is installed. The upper and lower sealing elements are enclosed between the spacer 10.

The packer is lowered into the well to the required depth. When the packer is triggered, the plpcs freely move along the surface of the cone 2, without impeding the downward movement of the device. The packer is fixed by lifting the drill string. At the same time, the cone 2 rises together with the column, pushes the blades 3 all the way into the foam of the well. After fixing the packer with

3692980

Further, the ascent of the column is perforated. The loga i is displaced relative to the cone and, acting on the lower spacer washer, compresses the mazhkt. Hey, by expanding the rubber cups of iodine by the action of axial load, the bore s of the well overlaps simultaneously in two intervals. The expansion nozzle 6 with a spring creates the same compressive forces on the pack, pulling cuffs After expelling the squash mixture to the isolated interval of the borehole nakep pb & To release the dies before lifting the device, it is necessary to make several turns of the drill string to the right.

As a result, the detachable adapter 11 having a left-hand thread is disconnected. After this, all parts And, connected by a perforated pipe 1, for example, sealing elements, under the action of gravity fall down. At 70

In this way, the plaipsi is moved along the surface of the cone upwards and simultaneously towards the axis of the mechanism.

Claims (2)

1. USSR author's certificate N 120802, cl. E 21 V 33/12, 1956. 2. Yasashin A. M. and Yakovlev A. I. Testing wells. M., Nedra, 1967, p. 77-79 (prototype).