SU1375797A1 - Device for setting bridge in cased-in well - Google Patents

Abstract

The invention relates to the drilling of wells and improves the operational reliability of the device. It contains the body (K) 1, the elastic container (EC) 7 filled with the tampon mixture, and the release mechanism EK 7 in the form of a controlled lock - latch P On the lateral surface K 1 the rods 5 are mounted and pivotally connected to it 6 at the bottom. At the ends of the EC 7, the upper 9 and lower 10 fasteners (CE) are placed. Upper CE 9 is associated with an EC 7 release mechanism, and CE 10 is placed in slots 6. Moreover, EC 7 is installed in an extended state between the rods 5. Latch -11 is connected to CE 9 and the uss (L

Description

with

ate

In the groove of the rod connected to the K 1 ball retainer with a needle connected to the actuator 3, the lock is opened at a predetermined depth, and the needle is lifted by the actuator 3, which opens the retainer. The rod lowers and the vnop latch 11 disengages from K 1. The latch 11 releases the CE 9. The device then rises, and the SC 10 leaves the slots 6, the rods 5 slip, and the transport part is removed to the surface. adjacent to the wall of the column. 1 hp f-ly, 4 ill.

one

The invention relates to the field of drilling wells, in particular, to devices for installing cut-off bridges during well workover.

The aim of the invention is to increase the operational reliability of the device.

Figure 1 presents the proposed device, a General view; FIG. 2 is view A of FIG. fig. 3 — controlled lock, cut; Fig. 4 shows the position of the controlled lock at the moment when the device operates.

The device comprises a housing 1, a mechanism for releasing an elastic container in the form of a controlled lock 2 with a drive 3 and a cable head 4. On the side surface of the housing there are brackets to which the rods 5 with the slots 6 on the lower end are hinged. In the inner space of the rods placed elastic container 7, filled with a tamping material 8 and provided with a top 9 and bottom 10 fasteners. The element 9 is connected to the latch 11, and the element 10 is connected with the grooves 6. The operated lock 2 is made as connected to the upper fastening element 9 of the front-end 11 mounted in the groove 12 of the Rod 13.

The rod 13 is connected with the housing 1 by a ball retainer 14 having a needle 15 connected to the actuator 3. When the needle 15 interacts with the actuator 3, a ball retainer 14 opens. With the housing 1, the stop 16 of the latch 11 is engaged,

The device works as follows.

ten

One of the ends of the container is sealed (for example, by overturning with a nylon cord), the calculated amount of cementing material is poured into it, and then the second end is sealed. Then, fastening elements — hinges — are installed at the ends of the container (pulled from the same nylon cord) and inserted into the rods. After the fastening element 9 is connected with the latch 11, the container is stretched by the length of the rods (they are 1-2.5 times longer than the container) and in the stretched condition

5 is fixed by the engagement of the fasteners 10 by the grooves 6. When stretched, the outer diameter of the container decreases (it is 5-10 mm larger than the diameter of the casing string) to a value that ensures uninterrupted maneuverability in the well. During the descent process, the rods prevent the container from rubbing against the wall of the column, protecting it from destruction.

The device is transported in the well to a predetermined depth, where the lock is cleared by the electrical signal. For example, the actuator 3 lifts the needle 15, opening the ball retainer 14, and the rod 13 under the action of the expanded container begins to move downwards. When the stop 16 comes out of engagement with the housing 1, the latch flips over (FIG. 4) and releases the fastening element 9. Next, the device is lifted, during which the fastening elements 10 exit the slots 6, the rods 5 slip between the walls of the column and the container, and the transport part is removed to the surface for subsequent use

0

call. Upon release from the transport part of the device, the container is compressed by the action of elastic forces to the diameter of the column and tightly adheres to its wall. The stretching force used to reduce the outer diameter of the container from the initial to the diameter of the column is expended on creating an overpressure inside the container to enable it to expand in the well.

Claims (2)

1. A device for installing a bridge in a cased well, comprising a housing, an elastic container filled with a grouting mixture, and an elastic container releasing mechanism, characterized in that, in order to increase operational reliability, it is equipped with a rod. with grooves in the lower part, mounted on the side surface of the body and hingedly connected with it, and the upper and lower fasteners 1 and elements at the ends of the elastic container, the lower of which are placed in the grooves of the rods, and the upper part is connected with the mechanism for releasing the elastic container, with This mechanism for releasing the elastic container is executed. It is in the form of a controlled lock, and the flexible container is set in an extended state in the space between the rods. 2. The device according to claim 1, characterized in that the controlled lock is made in the form of a latch connected to the upper fastening element, installed in the groove of the rod, connected to the body by a ball retainer with a needle connected to the drive. Fig.Z Figm