RU29090U1 - Packer - Google Patents

Description

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The proposal relates to the oil and gas industry and can be used in oil and gas wells for interval testing of their trunks.

A packer is known that contains a barrel with an annular groove on the outer surface, a support rigidly connected to the barrel, a pressure sealing element and a cone, a clip and slips installed therein, spring-loaded relative to the clip in the radial direction (1).

The disadvantage of this device is its unreliability in operation due to the fact that during unpacking by means of axial movement, the clips with slips are rotated around its axis, and since after a long time the packer is in the working position, the clips always jam, when they are rotated, they break. In this case, the packer is jammed in the column, an emergency situation is created.

The closest in technical essence to the proposed one is a packer, including a barrel with a figured groove on the outer surface with evenly spaced alternating longitudinal short and long sections, a support rigidly connected to the barrel, a pressure sealing element located under it and a cone mounted on the barrel with the possibility of axial movement a clip and a ring connected to it, a guide pin placed in a figured groove and

Device object

MKI6E21VZZ / 12 Packer

connected to the ring, installed in a ferrule around its circumference, tires, spring-loaded in the radial direction (2). The disadvantages of the packer are:

- the use of tubing for its descent into the well is an expensive undertaking, the descent and lifting of which takes a considerable amount of time;

the need to create a large load on the sealing element, which cannot be done at shallow depths;

-low reliability of sealing, due to the fact that under the influence of pressure from below on the sealing element, bending of the tubing and stragging of the sealing element is possible and, thereby, loss of sealing.

The objective of the proposal is to create a packer, ensuring its reliable sealing and allowing it to save significant material resources.

This problem is solved by the proposed poker, including a barrel with a figured groove on the outer surface with evenly spaced alternating longitudinal short and long sections, a support rigidly connected to the barrel, a pressure sealing element located under it and a cone mounted on the barrel with the possibility of axial movement of the cage and connected to her ring, a guide pin, placed in a figured groove and connected to the ring, slips installed in a clip around its circumference, spring-loaded in a radial direction phenomenon.

What is new is that the packer is equipped with a self-sealing sleeve installed on the barrel above the support and a tip rigidly connected to it, through which a rod is made, made with an annular ledge below, interacting with the tip, and radial holes located above the tip, and the rod is connected to the load having a camera at the bottom communicated with

the columned space of the well through radial holes and with an internal

the space of the rod by means of an axial channel blocked by a check valve; as a means for lifting and lowering use a rope.

In FIG. 1 shows the proposed packer in longitudinal section.

In FIG. 2 - scan of the shape and direction of the curly groove of the packer barrel.

The packer contains a barrel 1 with a figured groove 2 on the outer surface with evenly spaced, alternating longitudinal short and long sections. On the barrel, with the possibility of axial movement, a cage 3 is installed, connected below with a ring 4 connected to a guide pin 5 located in a figured groove 2. In the upper part of the cage 3, spring-loaded slips 6 with a locking element 7 are installed.

On the barrel 1 there is a support including a stop 8 and a locking screw 9, below which a sealing element 10 with a cone 11 is installed, and a self-sealing sleeve 12 above. A tip 13 is rigidly connected to the barrel at the top, through which a rod 14 with an annular ledge 15 at the bottom and radial holes 16 located above the tip 13.

The rod 14 is connected to a load 17 having a chamber 18 in communication with the column space of the well by means of radial holes 19 and with the interior of the rod by means of an axial channel 20 blocked by a check valve 21.

The packer works as follows.

His rope 22 is lowered into the well to the required depth. Then raise about 1 m up and again lower. As a result of this, the pin 5 from the short section of the curly groove 2 moves to the long section (before the packer is lowered into the well, the pin is installed in the short section of the groove 2 as shown in Fig. 2). With further downward movement, parts 3, 4, 5 and 6 remain in place, as the springs 23 press the smooth part of the slips 6 to the walls of the casing, and the details

1, 8, 9, 10, 11, 12, 13, 14 ... they move down until the cone 11 rests against the slips 6. Under the influence of the weight of the load 17 (2-3 tubing pipes can be used as cargo ) the slips 6 will diverge in the radial direction until the gear part comes into contact with the casing. Then the wellhead is sealed and pressure is raised inside the casing, under the influence of which the self-sealing sleeve 12 will push down the parts 1, 8, 9, 10 and 11, as a result of which the cone 11 will act on the slips 6 with even greater force, thereby strengthening the fixation of the packer in well, and the cuff 10 under the action of the load is compressed, reliably blocking the annular space of the well. Having established the degree of tightness of the well, the pressure is relieved and the packer is raised to a height of 1 m. In this case, the rod 14 rises, rests against the tip and acts on the barrel 1, which also rises, the sleeve 10 will take its initial position, and the cone 11 will disengage from the slips 6. The packer is again lowered, the finger 5 moves from a long section of the figured groove 2 to a short one, after which it receives the transport position and can be transferred to another interval of the well.

The proposed packer descends on the rope, which allows you to quickly test several intervals of the well and save a significant amount of time. The use of a self-sealing cuff and the possibility of creating pressure from above provide high and reliable sealing of annular space, including at shallow depths.

Information used

1.Analog. A.S. No. 1686128, MKIE 21 V 33/12, 1991.

2. The prototype. RF patent No. 2139408, MKI E 21 B 33 / 12.1999.

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Claims (1)

A packer including a barrel with a figured groove on the outer surface with evenly spaced alternating longitudinal short and long sections, a support rigidly connected to the barrel, a pressurizing sealing element located under it and a cone mounted on the barrel with the possibility of axial movement of the cage and a ring guiding it a pin placed in a figured groove and connected to a ring, slips installed in a ferrule around its circumference, spring-loaded in the radial direction, characterized in that it is equipped with a sealing cuff mounted on the barrel above the support and rigidly connected with a tip through which a rod is passed, made with an annular ledge below, interacting with the tip, and radial holes located above the tip, and the rod is connected to a load having a camera in the lower part, communicated with the column space of the well by means of radial holes and with the internal space of the rod by means of an axial channel blocked by a check valve as a means for raising and lowering use the rope.