RU120998U1 - PACKER WITH VALVE - Google Patents

Abstract

1. A packer with a valve, containing a stem, a sealing element, a body, a sub, a piston with an O-ring, characterized in that a composite sealing element, an upper and a lower cone, are installed on the rod together with the rings, the upper and lower cones are respectively located above and below the cones casings, in the grooves of which, respectively, upper and lower supports are installed, pressed against the rod by springs through the upper and lower stops and washers, and the upper and lower casings are connected respectively to the upper sub and the body, the rod in the upper part is connected to the upper sub, while in the groove the packer body has a key. ! 2. Packer according to claim 1, characterized in that the packer body is connected from below to the lower sub, to which the valve is attached by means of a stop. ! 3. Packer according to claim 1, characterized in that the packer body is connected from below to a mechanical anchor, to the cone of which a valve is attached by means of a stop.

Description

The utility model relates to the oil and gas industry and is intended for the development and operation of oil, gas and injection wells, repair and insulation works and other technological operations, as well as selective treatment of the formation under pressure, interval testing of the production string and the search for leaks using two packers.

A known packer containing a sub, a stem with a central channel, a sealing element, a housing and a locking member installed therein is a valve plate with a sealing ring, springs, an emphasis with flow holes and a nut with which the valve plate is movably fixed (patent No. 1027365, IPC E21B 33/12, publ. 07/07/1983).

The disadvantages of this packer include the ingress of solid particles (sand, sludge) in the seating surface between the spring plate and the valve seat, which leads to a violation of the tightness and erosion of the valve seats. In addition, when creating excessive in-line pressure above the packer, the plate moves down, compressing the spring. As a result, the sub-packer zone communicates with the over-packer and the tightness of the lower packer is violated. The disadvantages of this packer include the fact that under the influence of an aggressive environment, destruction and breaking of the spring are possible. Subsequently, the failure of the packer will be difficult, which will entail an emergency.

Known packer, selected for the prototype, containing a rod, a sealing element, a sub and a housing mounted respectively above and below the sealing element, as well as a piston with a sealing ring that perform the function of a shut-off valve installed in the packer body. The shutoff valve is installed to the lower packer. The shut-off valve is rigidly connected to the housing and the outer diameter of the piston element is not larger than the inner diameter of the rod (patent No.2002033, IPC E21B 33/12, publ. 30.10.1993).

A disadvantage of the known packer is the lack of sliding bearings necessary to prevent the sealing element from flowing into the annular gap between the packer body and the borehole walls. The disadvantages of this packer include the inability to transmit torque to the pipe string or equipment installed under the packer, as well as the inability to keep the packer from moving downward while creating high pressure drops.

The technical result achieved by using this utility model is to increase the efficiency of work carried out in the well, in particular, work related to the selective treatment of formations, interval testing of the production string, the search for leaks using two packers, and the possibility of transmitting torque to the pipe string or equipment installed under the packer, warranty; reliably holding the packer from moving down while creating high pressure drops.

To achieve the technical result in a packer with a valve containing a stem, a sealing element, a housing, a sub, a piston with a sealing ring, according to a utility model, a composite sealing element is installed on the stem together with the rings, the upper and lower cones are placed above and below the cones respectively, upper and lower casings, in the grooves of which are installed upper and lower bearings, pressed to the rod by springs through the upper and lower stops and washers, with the upper and lower casings connecting They are connected with the upper sub and the housing, respectively, the rod in the upper part is connected to the upper sub, while in the groove of the packer housing there is a key.

Also, to achieve the set result in a packer with a valve, according to a utility model, the packer body is connected from below to the lower sub, to which the valve is attached with an emphasis;

the bottom of the packer is connected to a mechanical anchor, to the cone of which a valve is attached using the stop.

Figure 1 presents the packer with the valve. Figure 2 presents the packer with a valve and a mechanical anchor.

The packer includes a composite sealing element 1, mounted in conjunction with the rings 2, upper 3 and lower 4 cones on the rod 5 (figure 1). Above and below the cones 3, 4 are placed, respectively, the upper 6 and lower 7 casings. The upper bearings 8, 9 are installed in the grooves of the upper casing 6. The lower supports 10, 11 are installed in the grooves of the lower casing 7. The upper 8, 9 and lower 10, 11 bearings are pressed against the rod 5 by springs 12 through the upper 13 and lower 14 stops and washers 15 The upper 6 and lower 7 casings are connected, respectively, with the upper sub 16 and the housing 17. The upper part of the rod 5 is screwed to the upper sub 16. The housing 17 is screwed to the lower sub 18. A key 19 is installed in the groove of the packer housing 17 to prevent mutual rotation rod 5 and the housing 17 of the packer relative to each other uga and providing the transmission of torque to the pipe string, or equipment installed below the packer (Fig. not shown).

Inside the packer is installed using the stop 20, screwed into the lower sub 18, the valve. The valve consists of a housing 21, in the upper part of which nuts 22 are installed, a cuff with a washer 23.

If the packer is installed without emphasis on the bottom, the packer is equipped with a mechanical anchor from below. The mechanical anchor consists of a barrel 24, on the upper end of which a cone 25 and a housing 26 are screwed (Fig. 2).

Dies 27 are placed in the grooves of the housing 28 and pressed against the barrel 24 by springs 28. In the grooves of the housing 26 there are spring-loaded trims 29, which are held on the housing 26 by tires 30 using screws 31. A sleeve 32 is mounted on the barrel 24 with the possibility of free rotation. Inside the sleeve 32, a retainer 33 is placed, the end part of which is constantly located inside the figured groove of the barrel 24. A sleeve 32 is placed inside the cap 34 screwed onto the lower part of the housing 26. A valve is installed to the inside of the cone 25 of the mechanical armature with a stop 20. The valve consists of a housing 21, in the upper part of which nuts 22 are installed, a cuff with a washer 23.

Packer with a valve operates as follows.

The packer is lowered into the well on the pipe string to the required depth.

The packer is installed in the well either with emphasis on the face or without emphasis on the face. During tripping operations, the upper 8, 9 and lower 10, 11 supports are pressed against the rod 5. To install the packer in a predetermined interval, the pipe string is unloaded for packing. The sealing elements 1 increase to the inner diameter of the column under the action of a compressive load and seal the under-packer zone from the over-packer. At the same time, the upper 8, 9 and lower 10, 11 bearings move in the radial direction and overlap the annular space between the outer diameter of the upper and lower shells 6.7 and the inner diameter of the production casing.

When packing the well, the valve body 21 enters the stem 5 and isolates the lower cavity of the packer from the upper.

If the packer is installed in the well without emphasis on the bottom, i.e. in the presence of a lower mechanical anchor, its translation into the working position is carried out by axial manipulations of the pipe string in a known manner. The pipe string is raised to a certain height, and then unloaded, while the barrel 24 with the cone 25 are moved down relative to the body parts of the anchor. The cone 25, in contact with the dies 27 and compressing the springs 28, will move the dies 27 in the radial direction until it engages with the walls of the production string.

To transfer the packer to the transport position, the pipe string is lifted. In this case, the upper 8, 9 and lower 10, 11 bearings under the action of the force of the springs 12 are moved to the transport position. The composite sealing element 1 takes its initial position.

If the packer is installed in the well without emphasis on the bottom, i.e. in the presence of a lower mechanical anchor, its translation into the transport position is carried out in a known manner. To do this, raise the pipe string. In this case, the cone 25 and the barrel 24 are moved upward relative to the body parts of the mechanical anchor, freeing the dies 27. The dies 27 are set in the same position by the force of the spring 28.

If necessary, reinstall the packer in the well, the operation is repeated in the above sequence.

Thus, the claimed utility model allows to increase the efficiency of work carried out in the well, in particular, work related to the selective treatment of formations, interval testing of the production string, the search for leaks using two packers, and the possibility of transmitting torque to the pipe string or equipment installed under packer, to ensure reliable retention of the packer from moving down while creating high pressure drops.

Claims (3)

1. A packer with a valve comprising a rod, a sealing element, a housing, a sub, a piston with a sealing ring, characterized in that a composite sealing element, an upper and lower cone are installed on the rod together with the rings, the upper and lower cones are located upper and lower, respectively casings, in the grooves of which are installed upper and lower bearings, pressed to the rod by springs through the upper and lower stops and washers, the upper and lower casings being connected respectively to the upper sub and the housing, the rod the upper part is connected to the upper sub, while there is a key in the groove of the packer body. 2. The packer according to claim 1, characterized in that the packer body is connected to the lower sub from the bottom, to which the valve is attached using the stop. 3. The packer according to claim 1, characterized in that the packer body is connected from below to a mechanical anchor, to the cone of which a valve is attached with an abutment.