RU69914U1 - COUPLING FOR REPAIR WORKS IN A WELL - Google Patents

Abstract

The utility model can be used in the oil industry, namely in the field of repair and insulation work on the bottom-hole zone of oil wells equipped with a packer during construction, operation, and completion of wells. The purpose of the utility model is to improve the quality and reliability of repair and insulation works in the well. The goal is achieved by the fact that the over-packer part of the special coupling is fixed to the pipe lowered into the well, the hole communicates with the cavity of the under-packer part of the special coupling, inserted into the central hole of the packer, and on the side cylindrical walls at opposite angles there are choke sleeves that communicate with the cavities through the holes, and the sub-packer part of the special coupling is fixed to the pipe, which is lowered further into the well. Using the utility model allows to increase efficiency by increasing various operations without the use of various additional devices. 1 p. Fs, 1 ill.

Description

The utility model “Special couplings for repair work in the well” refers to the oil industry, namely, to the field of repair and insulation work on the bottom-hole zone of an oil well equipped with a packer during construction, operation, and also when completing wells.

During the development of multilayer fields, annular flows can occur due to the creation of high pressure drops on the productive formations during the operation of the wells, differentiation of the current reservoir pressures between oil and water-saturated formations.

When carrying out repair and insulation works in the bottom-hole zone of oil wells, a packer is installed on the filling pipe to isolate the bottom-hole zone from the well. When a well passes through two or more layers, several packers are installed that isolate each of the layers.

A pipe bend is known, including a shaped connecting part, in which pipe elements are connected at an angle through existing openings, and the shaped part is made in the form of a sleeve placed on its side cylindrical walls (1).

A device for cement wells is made of filling pipes with a packer, and the remaining sub-packer part of the filling pipes is made of easily destructible and easily drilled material (2).

The disadvantage is the limitation of the possibility of combining operations during repair and insulation works that require cable connection of electric submersible equipment to the under-packer zone.

A device for stepwise casing cementing

in the well, including an upper sleeve located on the lower part of the washing pipe, the internal cavities of the washing pipes being connected to each other, a cementing sleeve is installed in the casing string above the upper sleeve, having through holes that are blocked by the gate in the transport position (3).

The disadvantage is that during repair work in the interval of two layers, a packer is installed through which it is difficult to provide reliable stepwise cementing of the casing in the well.

Due to these drawbacks, known devices are used only for specific operations and cannot be used to increase efficiency, since the packers used do not have free space to seal additional devices.

Thus, the problem arose of increasing the efficiency and reliability of repair and insulation works in the well, without the use of bulky devices and interchangeable devices.

The purpose of the utility model is to improve the quality and reliability of repair and insulation works in the well.

The target technical result is achieved by the fact that:

an over-packer special coupling (1), fixed on the thread of the pipe lowered into the well, is in communication with the cavity of the under-packer part of the special coupling (11);

the over-packer part of the special coupling (1) and the under-packer part of the special coupling (11) are inserted into the central hole of the packer and connected by a tapered thread, and on the side cylindrical walls at opposite angles there are nipple bushings with an internal thread;

the nozzle bushings are in communication with the cavities of the above-packer and sub-packer parts, where the axes of their holes coincide;

the under-packer part of the special coupling (11) is fixed on the thread of the pipe being lowered

further into the well.

Special couplings for repair work in the well are used as follows:

- when a packer equipped with special couplings is installed in the well, an electric cable or cable-cable or special cable-hose is introduced from the annular or annular space through the fitting sleeve of the over-packer part of the special coupling, passes through the over-packer and under-packer cavities and is led outside the special coupling into the annular or annular space before connection with the executive elements of the technological process;

- supply of various compositions, process fluids, etc. it is carried out through pipes fixed to the special coupling, through holes communicating the overpacker part of the special coupling (1) with the subpacker part (11).

Thus, the proposed utility model allows to improve the quality and reliability of repair and insulation works in the well. In this case, the technical result is achieved without installing any additional devices for the packer, which has limited dimensions. Using the proposed utility model can increase efficiency by increasing various operations in the well, for example, requiring a special cable-hose to pass through the packer, combining the supply of active chemical compositions and electric current to the well.

Information sources

1. Patent for utility model N 54412, IPC F16L 47/00, 2000.

2. A.S. N186918, IPC Е21В 39/20, 1966.

3. Patent for utility model N 51662, IPC Е21В 33/14, 2006.

Claims (1)

The coupling for repair work in the well, including the over-packer and under-packer parts, the cavities of which are connected by openings, characterized in that on the side cylindrical walls at opposite angles there are choke sleeves, the openings of which communicate with the cavities of the packer and under-packer parts of the coupling.