RU60973U1 - PACKER - Google Patents

Abstract

The proposal relates to the oil industry, namely to a downhole device for multiple interval testing of a pipe string in a well. The packer consists of a barrel with a curly groove on the outer surface with alternating axial short and long sections. A self-sealing cuff is installed on top of the barrel, under which the support is located. Under the support on the barrel, a sealing element is arranged sequentially, made in the form of a self-sealing cuff that does not let the cone pass from top to bottom. On the trunk below the cone with the possibility of axial movement is a clip with a guide pin. The guide pin is located in the aforementioned shaped groove of the barrel. The ring around the circumference is equipped with spring centralizers and slips, respectively spring-loaded outward and inward in the radial direction by means of spring plates. A tip is rigidly attached to the upper end of the barrel. The tip on top is equipped with radial holes, above which a plug is provided, equipped with a radial pin. A glass is movably mounted in the load from below, which is put on the tip and hermetically seals its radial openings, which are made with the possibility of opening when moving the tip down relative to the glass. On the outer surface of the glass, through axial grooves are made, in which the radial pin of the tip cap is placed. Above the through axial grooves of the glass, radial channels are made, constantly communicating the internal space of the glass with the external space. An additional load is movably installed in the trunk from below, above which lower radial channels are made in the trunk. The lower ends of the load and the barrel are provided with thrust threads, into which the upper ends of the glass and the additional load are respectively screwed, equipped with mating threads. The load and the additional load have the possibility of deviation relative to the axis of the packer during the descent and ascent. The axial short and long sections of the figured groove are interconnected by a closed figured section so that with axial reciprocating movement of the cage relative to the barrel, the guide pin will be located, then in the axial short section - transport position, then - in the axial long section of the figured groove - working position.

The proposed packer has small dimensions and weight, in addition, it is cheap to manufacture, and therefore the cost of the packer is reduced, and the expansion of its functionality allows for crimping pipes in small diameter columns, and the hinge connection with the packer of cargo and additional cargo allows avoiding jamming of the packer in a pipe string during hoisting operations. 2 ill. for 1 liter

Description

The proposal relates to the oil industry, namely to a downhole device for multiple interval testing of a pipe string in a well.

Known packer (certificate for utility model No. 29090 IPC 7 E 21 B 33/12, publ. Bull. No. 12 of 04/27/2003), including a barrel with a curly 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 connected to it, a guide pin placed in a figured groove and connected to the ring mounted in the cage along its circumference these are spring loaded springs in the radial direction, while 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, moreover, the rod is connected to a load having a camera in the lower part, in communication with the column space of the well through radial holes and with the inner space of the rod through an axial a bank covered by a non-return valve, a rope is used as a means for raising and lowering.

The closest in technical essence to the proposed is the packer (patent for utility model No. 37763 IPC 7 E 21 B 33/12, publ. Bull. No. 13 dated 05/10/2004), including a barrel with a figured groove on the outer surface with alternating 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 with a guide pin, which is placed in a curly groove, slips installed in the cage along its circumference, spring-loaded in in the opposite direction, a self-sealing cuff mounted on the barrel above the support, a tip rigidly connected to the barrel through which a rod with radial holes located above the tip is passed, the rod being made with an annular ledge below that interacts with the tip and is connected to a load having a camera in the lower part, communicated with the inner space of the rod by means of an axial channel blocked by a check valve, and the load is additionally equipped from below with a sleeve rigidly connected to it, having Other channels corresponding

radial channels of the rod, and below the conical surface, made with the possibility of interaction with the inner surface of the self-sealing cuff, while the outer diameter of the sleeve is larger than the diameter of the self-sealing cuff in the transport position, and the figured groove is closed on one side of the outer surface of the barrel.

Both analog and prototype have common design flaws:

- firstly, the metal consumption and a large number of technologically complex parts leading to high manufacturing costs and, as a consequence, the cost of the packer design as a whole;

- secondly, limited functionality, since it is not possible for the packer to work in columns of a small diameter;

- thirdly, the load is rigidly connected to the packer barrel and does not deviate from the axis of the barrel, which during tripping operations in the well leads to jamming of the packer in the pipe string, due to the contact of the lower end of the packer with the inner walls of the compression string, especially with a large cargo length.

The technical task of the utility model is to reduce the cost of manufacturing the packer, as well as expanding its functionality, namely, crimping in small diameter columns with the possibility of deflecting the load relative to the wellbore during the hoisting operations of the packer in the well.

The technical problem is solved by the proposed packer, including a barrel with a curly groove on the outer surface with short and long longitudinal sections, a support rigidly connected to the barrel, a sealing element sequentially located under it and a cone mounted on the barrel with the possibility of axial movement of the clip with a guide pin, which is placed in a curly groove, centralizers and slips installed in a holder around its circumference, spring-loaded respectively outward and inward in the radial direction, self-sealing mange the one mounted on the barrel above the support, the tip rigidly connected to the barrel located on top of the barrel and the load, while the longitudinal short and long sections of the figured groove are interconnected by a closed figured section so that when the axial reciprocating movement of the cage relative to the barrel, the guide pin it will be located either in the short axial section - the transport position, then - in the long axial section of the curly groove - the working position.

What is new is that the sealing element is made in the form of a self-sealing cuff that does not pass from top to bottom, and the tip from above is equipped with radial holes, above which there is a plug equipped with a radial pin,

at the same time, the glass is movably mounted in the load from below, the glass is put on the tip and hermetically seals its radial holes, which are made with the possibility of opening when moving the tip down relative to the glass, and on the outer surface of the glass there are made through axial grooves under the radial pin of the tip cap, while above the axial through grooves of the cup, radial channels are made, constantly communicating the inner space of the cup with the outer space, and the bottom of the barrel is movably mounted flax additional load, above which the lower radial channels are made in the barrel, while the lower ends of the load and the barrel are provided with stop threads, into which respectively the upper ends of the glass and additional load are screwed, equipped with mating threads, and the load and additional load can deviate relative to the axis of the packer during the hoisting operations.

Figure 1 - shows the proposed packer in longitudinal section.

Figure 2 - scan shaped groove made on the outer surface of the barrel.

The packer consists of a barrel 1 (see figure 1) with a curly groove 2 on the outer surface with alternating axial short 3 (see figure 2) and long 4 sections. On top of the barrel 1 is installed a self-sealing cuff 5, under which there is a support 6. (see figure 1). Under the support 6 on the barrel 1, a sealing element 7 is sequentially arranged, made in the form of a self-sealing sleeve that does not let the cone 8 pass from top to bottom. On the barrel 1 below the cone 8, a sleeve 9 with a guide pin 10 is axially movable. The guide pin 10 is located in the aforementioned shaped groove 2 of the barrel 1. The cage 9 is provided around the circumference with spring centralizers 11 and slips 12, spring-loaded respectively outward and inward in the radial direction by means of spring plates 13. To the upper end of the barrel 1 rail a tip 14 is simply attached. The tip 14 is equipped with radial holes 15 above, a plug 16 provided with a radial pin 17. A cup 19 is movably mounted in the load 18 from the bottom. The cup 19 is mounted on the tip 14 and hermetically seals its radial holes 15, which are made opening when moving the tip 14 down relative to the glass 19.

On the outer surface of the cup 19, through axial grooves 20 are made, in which a radial pin 7 of the plug 16 of the tip 14 is placed. Above the through axial grooves 20 in the cup 19 are made radial channels 21, which constantly communicate the inner space 22 of the cup 19 with the outer space (in FIG. 1 and 2 not shown).

An additional load 23 is movably mounted in the barrel 1 from below, above which lower radial channels 24 are made in the barrel 1.

The lower ends of the load 18 and the barrel 1 are provided with stop threads 25 and 26, into which the upper ends of the cup 19 and the additional load 23 are respectively screwed, equipped with mating threads 27 and 28. The load 18 and the additional load 23 can deviate relative to the axis of the packer during descent and lifting.

Axial short 3 (see Fig. 2) and long 4 sections of the figured groove 2 are interconnected by a closed figured section 29 so that when the axial reciprocating movement of the cage 9 relative to the barrel 1, the guide pin 10 will be located, then in the axial short section 3 - transport position, then - in the axial long section 4 of the figured groove 2 - the working position.

Unauthorized fluid flows on mating surfaces are excluded by sealing elements 30, 31.

The packer works as follows.

At the wellhead, the guide pin 10 of the cage 9 (see figure 2) is installed in the axial short section 3 of the figured groove 2 - transport position.

Then, into the threaded threads 25 and 26, respectively, made at the lower ends of the load 18 and the barrel 1, the corresponding upper ends of the cup 19 and the additional load 23, equipped with mating threads 27 and 28, are screwed to the end of the threads.

Next, the packer on the rope 32 (see Fig. 1) is lowered into the pipe string (not shown in Figs. 1 and 2) in the interval where it is necessary to pressure test, while the load 18 and the additional load 25 are prevented by the buoyancy force that occurs after immersion the packer under the liquid level in the pipe string.

During the descent of the packer, the load 18 and the additional load 23 deviate from the axis of the packer, which prevents jamming of the latter during the descent process, and the spring centralizers 11 of the cage 9, spring-loaded outward, are in constant contact with the walls of the pipe string. The liquid located in the well during the descent of the packer freely flows from bottom to top through the lower radial channels 24 of the barrel 1 into the inner space of the barrel 1 and then through the radial holes 15 of the tip 14 into the outer space above the packer, since the cup 19 does not overlap the radial holes 15 of the tip 14, wherein the radial pin 17 of the plug 16 of the tip 14 is abutted in the lower ends of the through axial grooves 20 of the glass 19.

Having reached the required crimping interval, the pipe string is filled with process fluid. Next, the packer is lifted about 1 meter up and down, as a result of the operation, the guide pin 10 (see figure 2) moves when lifting

from the upper part of the axial short section 3 to its lower part and then through the lower part of the closed figured section 29 to the lower part of the axial long section 4 of the figured groove 2, and then (when lowering) the guide pin 10 moves from the bottom of the axial long section 4 of the figured groove 2 in its upper part.

At the same time, the packer, with the exception of parts 9, 10, 11, 12 and 13 (see FIG. 1), which remain stationary due to the contact of the spring centralizers 11 of the holder 9 with the walls of the pipe string (not shown in FIGS. 1 and 2), moves relative to parts 9, 10, 11, 12 and 13, first up and then down.

The upward movement of the guide pin 10 from the lower part of the axial long section 4 of the figured groove 2 to its upper part continues until the slips 12 of the cage 9 are radially spring-loaded inward by means of spring plates 13 that come into contact with the cone 8 which is rigidly connected to the barrel 1 After interacting with the cone 8, the slips 12 of the cage 9 under the action of the weight of the packer diverge in the radial direction and are pressed against the walls of the tested pipe string (not shown in FIGS. 1, 2), fixing the barrel 1 motionless. at the packer’s hands, first the cup 19 with the load 18 is lowered down relative to the fixed caps 16 with the tip 14 rigidly connected to the barrel 1, while the load 18 by means of sealing elements 30 and 31 hermetically seals the radial holes 15 of the tip 14, while the radial pin 17 abuts against the top end face of through axial grooves 20 cups 19.

Then the well is filled with process fluid and the wellhead is sealed. Using a pump unit (not shown in Figures 1, 2), the pressure inside the pressure-tested pipe string is raised to the required pressure, which acts on the self-sealing sleeve 5 from above, and the higher the pressure of pressure testing the pipe string, the more pressure is applied to the self-sealing sleeve 5, the more it is pressed self-sealing cuff 5 to the walls of the tested pipe string. The self-sealing cuff 7 performs a safety role and eliminates the passage of liquid from the top down in the event of leakage in the self-sealing cuff 5. Having established the degree of tightness of the pipe string, the pressure is relieved and the packer is raised to a height of about 1 m by the rope 32 and lowered.

At the same time, at the beginning of the lift, only the load 18 with the glass 19 rises, and all other parts of the packer remain in place. In the process of lifting the load 18 with the glass 19, the radial holes 15 of the tip 14 are opened, and the process fluid located above the packer through the aforementioned radial holes 15 of the tip 14 rushes into the barrel 1 and then through the lower radial holes 26 of the barrel 1

goes into the outer space under the packer. The lifting of the load 18 with the cup 19 continues until the radial pin 17 of the plug 16 of the tip 14 abuts against the upper ends of the through axial grooves 20 of the cup 19, while the radial channels 21 constantly communicating the inner space 22 of the cup 19 with the outer space of the packer exclude " pistoning "of the load 18 with the glass 19 during their axial movement relative to the plug 16 with a tip 14.

With the further lifting of the packer upward, the load 18 with the cup 19 by means of a radial pin 17 pulls the plug 16 with the tip 14, which, in turn, is rigidly connected to the barrel 1 and causes the latter to move.

The packer through the rope 32 continues to lift upward, while the guide pin 10 moves relative to the upwardly moving barrel 1, from the upper part of the axial long section 4 of the figured groove 2 (see figure 2) to the upper part of the closed figured section 29, and then when the descent moves from the upper part of the closed figure section 29 to the upper part of the axial short section 3 of the figure groove 2, moving the packer from the working position to the transport one.

In this case, the packer, with the exception of parts 9, 10, 11, 12 and 13 (see FIG. 1), which remain stationary due to the contact of the spring centralizers 11 of the holder 9 with the walls of the pipe string, moves relative to parts 9, 10, 11, 12 and 13 down and then up. In the process of lifting the packer, the liquid above the packer freely flows from top to bottom through the open radial holes 15 of the tip 14 through the inner space of the barrel 1 and then through the lower radial channels 24 of the barrel 1.

Further, the packer can be moved to another interval of the well for crimping the pipe string or removed to the surface, while the load 18 and the additional load 23 deviate from the axis of the packer to prevent jamming of the latter in the compressed pipe string.

The proposed packer has small dimensions and weight, in addition, it is cheap to manufacture, and therefore the cost of the packer is reduced, and the expansion of its functionality allows for crimping pipes in small diameter columns, and the hinge connection with the packer of cargo and additional cargo allows avoiding jamming of the packer in a pipe string during hoisting operations.

Claims (1)

A packer including a barrel with a figured groove on the outer surface with short and long longitudinal sections, a support rigidly connected to the barrel, a sealing element sequentially located under it and a cone mounted on the barrel with the possibility of axial movement of the clip with a guide pin, which is placed in the figured groove, centralizers and slips installed in the cage along its circumference, spring-loaded respectively outward and inward in the radial direction, self-sealing cuff mounted on the barrel above the support, rigidly o the tip connected to the barrel located on top of the barrel and the load, while the longitudinal short and long sections of the figured groove are connected to each other by a closed figured section so that with axial reciprocating movement of the clip relative to the barrel, the guide pin will be located then in the short axial section - transport position, then in the long axial section of the figured groove - the working position, characterized in that the sealing element is made in the form of a self-sealing cuff that does not pass from top to bottom and the tip on top is equipped with radial holes, above which there is a plug equipped with a radial pin, while the glass is movably mounted in the load from the bottom, while the glass is put on the tip and hermetically seals its radial holes, which can open when the tip moves downward relative to the glass, moreover, on the outer surface of the cup, axial grooves are made under the radial pin of the cap of the tip, while radial channel is made above the axial grooves of the cup constantly communicating the inner space of the glass with the outer space, moreover, an additional load is movably installed in the barrel below, above which the lower radial channels are made in the barrel, while the lower ends of the load and the barrel are provided with stop threads, into which the upper ends of the glass and additional load are respectively screwed, equipped with mating threads, the load and additional load being able to deviate relative to the axis of the packer during tripping operations.