RU222342U1 - DEVICE FOR MOVEMENT OF CYLINDRICAL CELLS IN PRODUCTION COLUMNS - Google Patents

Abstract

The utility model relates to the oil industry, in particular to equipment for operating an oil or gas well, and is designed to move sliding sleeves inside a production string. The technical result of the claimed technical solution is to increase the reliability of the device for moving cylindrical liners in production columns due to the device for moving cylindrical liners in production columns, characterized by the fact that it contains crackers placed around the axis of the device with external hooks and end grooves, and also made with the possibility of axial displacement of the piston and rod relative to each other; levers are installed on the piston and rod opposite each other with the ability to rotate relative to their attachment points in planes containing the axis of the device; the free ends of the levers are placed in the end grooves of the crackers and secured in them with the possibility of rotation, while the device contains additional pairs of levers installed on the piston with the possibility of rotation relative to their coaxial attachment points; the free ends of the additional levers are fixed with the possibility of rotation, coaxial with the ends of the levers connecting the rod and the block.

Description

The device relates to the oil industry, in particular to equipment for operating an oil or gas well, and is designed to move sliding sleeves inside the production string.

The closest in technical essence is the “DEVICE FOR MOVEMENT OF CYLINDRICAL CASES IN PRODUCTION COLUMNS” according to utility model patent No. 214990, dated 10/27/2022, published 11/23/2022, IPC E21B43/00, characterized by the fact that it contains a tubular rod; a tubular piston with the end of a tubular sleeve rigidly fixed on its outer surface is mounted on the rod with the possibility of axial movement; at the opposite end of the tubular sleeve there is a head with an axial hole rigidly fixed through which the rod is passed with the possibility of axial movement; the rod has a compacted thickening that covers the lumen of the tubular sleeve; an annular cavity is formed between the compacted thickening on the rod and the piston, which communicates through the holes with the cavity of the rod; a spring is located between the sealed thickening on the rod and the head; Pairs of levers equipped with nuts with external hooks are installed on the piston and rod.

When the known device is activated during its transition to the open state, the cracker may deviate from the plane containing the axis of the device. The possibility of deviation is due to the low rigidity of the sleeve gripping unit, which includes levers and a cracker, as well as a significant number of backlash gaps, determined by technological tolerances for the manufacture of elements of the gripping unit. The larger the diameter of the serviced production column, the greater the displacement of the cracker relative to the plane containing the axis of the device can be. Deviation of the cracker from the calculated position can create conditions under which movement of the sleeve will be impossible.

The objective of the proposed technical solution is to increase the accuracy of the positioning of the cracker in the open operating state of the device for moving cylindrical sleeves in production columns.

The problem was solved by a device for moving cylindrical liners in production columns, characterized in that it contains crackers with external hooks and end grooves placed around the axis of the device, as well as a piston and rod configured to be axially displaced relative to each other; levers are installed on the piston and rod opposite each other with the ability to rotate relative to their attachment points in planes containing the axis of the device; the free ends of the levers are placed in the end grooves of the crackers and secured in them with the possibility of rotation, while the device contains additional pairs of levers installed on the piston with the possibility of rotation relative to their coaxial attachment points; the free ends of the additional levers are fixed with the possibility of rotation, coaxial with the axes of rotation of the ends of the levers connecting the rod and the block.

The essence of the technical solution is illustrated by drawings, where in FIG. 1 is a cross-section of a device for moving cylindrical liners in production columns in a closed state, FIG. 2 - sleeve pickup unit in the open operating state of the device for moving cylindrical sleeves in production columns.

In fig. 1 shows: device 1 for moving cylindrical sleeves, tubular rod 2, tubular piston 3, tubular sleeve 4, head 5, sealed thickening 6, annular cavity 7, holes 8, rod cavity 9, spring 10, levers 11, crackers 12, external hooks 13, fitting 14, end grooves 15, additional levers 16.

The device for moving cylindrical sleeves in production columns is designed as follows.

Device 1 contains a tubular rod 2, on which a sealed thickening 6 is made. Optionally, the rod 2 can be made of several longitudinally connected parts. A tubular piston 3 is mounted on the tubular rod 2 with the possibility of axial movement. The tubular piston 3 is mounted on the rod 2 to form an annular cavity 7 located between the thickening 6 of the rod 2 and the end of the tubular piston 3. Through holes 8 are made in the wall of the tubular rod 2, through which the annular cavity 7 communicates with the cavity 9 of the rod 2. The cavity 7 is isolated from the external environment by a tubular sleeve 4. One of the ends of the tubular sleeve 4 is rigidly fixed on the outer surface of the tubular piston 3. The fixation of the tubular sleeve 4 relative to the piston 3 is carried out by any method known from the prior art, for example, using a welded or threaded connection. The opposite end of the tubular sleeve 4 is rigidly fixed on the outer surface of the head 5 with an axial hole. Fixation of the tubular sleeve 4 relative to the head 5 is carried out by any method known from the prior art, for example, using a welded or threaded connection. A rod 2 is passed through the axial hole of the head 5. The rod 2 is located in the axial hole of the head 5 with the possibility of its axial movement. The head 5 is installed on the rod 2 with the formation of an annular cavity between the end of the head 5 and the sealed thickening 6 of the tubular rod 2. A spring 10 is installed in the cavity between the thickening 6 and the head 5. The stiffness of the spring 10 determines the level of the threshold pressure of the working medium in the cavity 9 at which the device 1 takes the open position. The thickening 6 and the tubular piston 3 are made sealed and block the lumen of the tubular sleeve 4, which avoids unregulated leakage of the working medium from the annular cavity 7. Levers 11 are installed on the piston 3 and rod 2 opposite each other. Levers 11 are installed with the ability to rotate relative to their attachment points in the planes containing the axis of the device 1. The pairs of levers 11 are made mechanically connected to each other by means of crackers 12. The crackers 12 contain end grooves 15. Optionally, the crackers 12 are made symmetrical relative to the plane containing the axis of the device 1. The free ends of the levers 11 are placed in the end grooves 15 There are 12 crackers and they are fixed in them with the possibility of rotation. Placing the free ends of the levers 11 in the grooves 15 allows the movement of the block 12 in the plane containing the axis of the device 1. The block 12 contains external hooks 13, designed for contact with the mating surface of the moved sleeve. The external hooks 13 are oriented in the direction from the axis of the device 1. The pairs of levers 11 are installed in such a way that in the closed position of the device 1, with the spring 10 uncompressed, the external hooks 13 do not extend beyond the cross-sectional dimensions of the tubular sleeve 4. The pairs of levers 11 are installed in such a way that that when the distance between the axes of their attachment to the rod 2 and the piston 3 decreases, the crackers 12 move radially in the direction from the axis of the device 1 in a plane containing the axis of the device 1. The device 1 contains additional pairs of levers 16 mounted on the piston 3 with the possibility of rotation relative to their coaxial attachment points. The free ends of the additional levers 16 are made fixed with the possibility of rotation, coaxial with the ends of the levers 11 connecting the rod 2 and the block 12. Optionally, device 1 can be equipped with a fitting 14 installed in the cavity 9 of the rod 2. The diameter of the axial hole of the fitting 14 determines the required flow rate working environment to achieve a threshold level of pressure in cavity 9. The diameter of the axial hole of the fitting 14 is selected based on the characteristics of the equipment installed at the wellhead.

A device for moving cylindrical sleeves in production columns is used as follows.

Device 1 is attached to the end of the tubing string and lowered into the well to the required depth. When device 1 reaches the required depth at which the crackers 12 are located inside the cavity of the moving sleeve, the flow rate of the working medium is increased. Due to an increase in the flow rate of the medium, the pressure in the cavity 9 of the rod 2 increases. When the threshold pressure value is reached, the annular cavity 7 begins to expand, overcoming the resistance of the spring 10. When the cavity 7 expands, the tubular piston 3, tubular sleeve 4 and head 5 are displaced relative to the rod 2 in the direction of the fitting 14 When the piston 3 moves in the direction of the fitting 14, the distance between the axes of fastening the pairs of levers 11 is reduced, as a result of which the crackers 12 move radially in the direction from the axis of the device 1 to the inner surface of the sleeve. Simultaneously with the process of spatial transformation of the sleeve gripping unit, which includes levers 11 and a block 12, pairs of additional levers 16 are rotated. The external hooks 13 located on the block 12 come into contact with the mating surface of the moved sleeve. Device 1 takes the open position. For more reliable fixation of the sleeve on the hooks 13, the pressure in the cavity 9 can be further increased. Without reducing the pressure, device 1 is moved together with the cylindrical sleeve in the required direction. When the sleeve reaches the required position, the flow rate of the working medium is reduced, thus lowering the pressure in the cavity 9. Under the force of the spring 10, the head 5, the tubular sleeve 4 and the tubular piston 3 are displaced relative to the tubular rod 2 in the direction from the fitting 14. When the piston 3 moves in the direction from the fitting 14, the distance between the axes of fastening of the levers 11 increases and the crackers 12 move radially in the direction of the axis of the device 1, which thus assumes a closed position. Then device 1 is moved to the next sleeve or raised to the wellhead.

The use of additional levers 16 increases the rigidity of the sleeve gripping unit, which includes levers 11 and the block 12, in the open operating state of the device 1. Increasing the rigidity of the sleeve gripping assembly reduces the possible spatial deviation of the block 12 from the plane containing the axis of the device 1. Increasing the positioning accuracy of the block 12 reduces the likelihood of a situation with an abnormal arrangement of crackers in space, in which moving the sleeve becomes impossible. Reducing the likelihood of an emergency situation occurring during operation of device 1 increases the reliability of its operation.

The technical result of the claimed technical solution is to increase the reliability of the device for moving cylindrical liners in production columns due to the device for moving cylindrical liners in production columns, characterized by the fact that it contains crackers placed around the axis of the device with external hooks and end grooves, and also made with the possibility of axial displacement of the piston and rod relative to each other; levers are installed on the piston and rod opposite each other with the ability to rotate relative to their attachment points in planes containing the axis of the device; the free ends of the levers are placed in the end grooves of the crackers and secured in them with the possibility of rotation, while the device contains additional pairs of levers installed on the piston with the possibility of rotation relative to their coaxial attachment points; the free ends of the additional levers are fixed with the possibility of rotation, coaxial with the ends of the levers connecting the rod and the block.

Claims (1)

A device for moving cylindrical sleeves in production columns, characterized in that it contains crackers placed around the axis of the device with external hooks and end grooves, as well as a piston and rod configured to be axially displaced relative to each other; levers are installed on the piston and rod opposite each other with the ability to rotate relative to their attachment points in planes containing the axis of the device; the free ends of the levers are placed in the end grooves of the crackers and secured in them with the possibility of rotation, characterized in that it contains additional pairs of levers installed on the piston with the possibility of rotation relative to their coaxial attachment points; the free ends of the additional levers are fixed with the possibility of rotation, coaxial with the ends of the levers connecting the rod and the block.