RU35821U1 - DEVICE FOR PROCESSING LAYERS IN A WELL - Google Patents

Description

OBJECT-DEVICE Device for processing formations in a well

The proposal relates to the oil industry, namely, devices for separating formations in a well by separately injecting various reagents into them.

A device for pumping reagents into a well is known (a.s. No. 1295800, MKI E 21 B 33/12, 1985), including a barrel with two rows of radial holes, a spring loaded differential sleeve with two rows of radial holes placed on it, rigidly connected with the lower part of the barrel and the bottom of the body, which is thickened from below, with rows of radial holes, a stepped sleeve and a sealing element mounted on the body, the upper end portion of which is fixed to the stepped sleeve.

The disadvantage of this device is the design complexity and low reliability of its operation, due to the mobility of the upper stepped sleeve down, which complicates the lifting of the device and its relocation in the well due to periodic compression of the sealing element into the accordion.

The closest in technical essence to the proposed is a device (AS JVbl714080, MKI 5 E 21 VZZ / 12, 1992) for injecting reagents into a well containing a packer including a housing and an elastic cuff, a disconnector including a shaft equipped with radial channels and spool.

The disadvantages of the device are:

- design complexity due to the presence of a large number of nodes and parts;

MPK7E21VZZ / 12

If you need to upload to another layer, you need to unpack the equipment and install it again in a new place.

As a rule, when reagents are pumped into the strata, after their treatment, the latter are cleaned of dirt, sludge and asphalt-paraffin deposits. This is done by lowering the level, for example by swabbing. To carry out this operation, the known device must be lifted from the well, lower the tubing string (tubing) with a swab to the surface. When processing two layers, it is necessary to lower the equipment four times, and this takes a large amount of time and, therefore, material resources.

The objective of the utility model is to develop a device with a simpler design, which allows to process two layers in one run of the equipment into the well and thereby save a significant amount of time and reduce material costs.

The problem is solved by the proposed device containing a packer, comprising a housing and an elastic cuff, disconnector, including a barrel equipped with radial channels and a spool.

What is new is that the packer body is made upstream and provided with a bypass valve from below, passing from top to bottom, with radial channels made in the lower part of the body communicating the inside of the packer with a sub-packer space.

Also new is the fact that the spool of the disconnector is located inside its trunk and connected to it by shear elements, it is equipped with a seating seat for a ball that is discharged into the device before processing the second layer.

It is also new that the upper part of the disconnector barrel is provided with an emphasis on the outside, in addition to which, on its outer surface, bushings and a tip are connected, interconnected by shear elements and forming a hydraulic chamber, the tip being rested against the bottom and pushed by the sleeve from above. An analysis of known similar solutions allows us to conclude that there are no

them signs similar to the distinctive signs in the claimed device, i.e. on the compliance of the proposed solutions to the criteria of "novelty and" industrial applicability.

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

Figure 2 is a scan of the shape and direction of the curly groove of the packer body.

The proposed device consists of a packer and disconnector.

The packer comprises a housing 1 (see Fig. 1) with a curly groove 2 on the outer surface (see Fig. 2) with evenly spaced alternating longitudinal, short and long sections. On the housing 1, with the possibility of axial movement, a holder 3 is mounted, connected below with a ring 4, connected to a guide pin 5, placed in a figured groove 2. In the upper part of the holder 3, spring-loaded slips 6 with a locking element 7 are installed. On the case 1 there is a lower support 8, elastic cuff 9 and upper support 10, rigidly connected to the housing 1 (an independent application has been compiled and sent to FIPS).

A bypass valve 11 is installed in the lower end of the housing 1, which passes from top to bottom, in addition, radial channels 12 are made in the lower part of the housing 1, communicating the under-packer space with the inside of the packer (not shown in Fig.).

A disconnector barrel 13 connected to the upper support 10 of the packer is provided with radial channels 14. A spool 15 is mounted concentrically inside the trunk 13 opposite the radial channels 14. The spool 15 is connected to the barrel 13 by shear elements 16. A seating seat 17 is located in the upper part of the spool 15.

On the outer part of the barrel 13 there is a tip 18 and a sleeve 19 interconnected by shear elements 20, in addition, the tip 18 with its lower part is abutted against an emphasis 21, which is made in the upper outer part of the barrel 1, and is clamped on top by a sleeve 22, which in turn is screwed to the top of the barrel 1.

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The tip 18 n of the sleeve 19 form a hydraulic chamber 23.

The mating surfaces of the device are provided with sealing elements 24.

The device operates as follows.

It is assembled on the tubing string 25 and drained into the well to the required depth and installed between the layers that need to be processed. Then the device is lifted about 1 meter up and again lowered. As a result of this, the pin 5 from the short section of the curly groove 2 moves to the long section (before the device is lowered into the well, the pin 5 is installed in the short section of the groove 2 as shown in Fig. 2). With further mixing down details 3,4,5,6 remain in place, since the springs 26 press the smooth part of the slips 6 to the casing walls

columns (not shown in FIG.), and parts 1,8,9,10 move down until

the conical part of the lower unor 8 will not abut against the slips 6. Under the influence of the weight of the tubing string 25, the slips 6 will diverge in the radial direction until the gear part comes into contact with the casing, and the elastic sleeve 9 is compressed under the action of the load, reliably blocking the annulus of the well.

After that proceed to the processing of the lower layer. For this, the reagent along the tubing string 25 through the internal spaces of the spool 15, housing 1 and radial channels 12 is pumped into the lower layer and left for reaction. After a certain time, swabbing is carried out by lowering the level.

Then proceed to the processing of the upper layer. To do this, throw a ball 27 into the tubing string 25, which sits on the seat 17 and overlaps the central channel 28 of the spool 15. In the tubing string 25, the pressure is increased, as a result of which the shear elements 16 are destroyed. The spool 15 starts to move downward, while the radial channels 14 open. When moving down the spool 15 with ball 27, the bypass valve 11 passes liquid from top to bottom. In parallel with the movement of the slide valve 15 downward, the liquid enters the hydraulic chamber 23, and the slide valve 15 continues to move down until

its end does not rest against the lower end of the cornea 1, as a result of which the radial channels 12 of the housing 1 are closed.

Then they continue to increase the pressure in the hydraulic chamber 23 until the shear elements 20 are destroyed, after which the sleeve 18 lowers down and sits on the end face of the upper support 10 of the housing 1, as a result of which the radial channels 14 are connected; they enclose the inner space of the packer with an overpacker space ( In Fig. Not shown).

After that, along the tubing string 25 through the barrel 13, the radial channels 14 inject the reagent into the upper layer and leave for reaction. After a certain time, as well as in the lower layer, swabbing is performed by lowering the level.

After processing the second layer, the tubing string 25 is raised by about 1 meter, while the packer body 1 also rises, the lower stop 8 disengages from the slips 6, the load on the cuff 9 is removed, and it takes its original position. The device is again lowered, the pin 5 moves from a long section of the figured groove 2 (see Figure 2) to a short one, after which the equipment receives a transport position and can be moved to another interval of the well or raised to the surface.

The proposed device is more advanced in design than the known one and allows both processing of two layers and their cleaning in one descent of equipment.

When using the known device for drainage; to carry out the indicated complex of operations, it will be necessary to lower the equipment into the well several times.

Ultimately, the proposed device will save a large amount of time for carrying out these works and dramatically reduce the cost of their implementation.

Claims (3)

1. A device for treating formations in a well, comprising a packer including a body and an elastic sleeve, a disconnector including a barrel provided with radial channels, and a spool, characterized in that the packer body is made through and is provided with a bypass valve from the bottom, passing from top to bottom, and radial channels are made in the lower part of the housing, communicating the inner space of the packer with the sub-packer space. 2. The device according to claim 1, characterized in that the disconnector spool is located inside its trunk and connected to it by shear elements, equipped with a seating seat for a ball discharged into the device before processing the second layer. 3. The device according to claims 1 and 2, characterized in that the upper part of the disconnector barrel is provided with an emphasis on the outside, in addition to which on the outer surface there are mounted shear elements and a sleeve and a tip forming a hydraulic chamber, the tip being rested against the bottom and top tightened by the sleeve.