RU2683725C1 - Detonation transmission unit - Google Patents

Abstract

FIELD: mining.SUBSTANCE: invention relates to the drilling and blasting operations in various wells and, in particular, oil or gas wells of various types and can be used in devices for the transmission of detonation of cumulative perforators. Detonation transmission unit contains a frame, an adapter, a detonating cord, a transfer charge, a booster sleeve, a frame sleeve with an annular protrusion, and contacts. Inventive device further comprises a rotary sleeve with the ability to install into the frame sleeve by axial movement to the annular protrusion and turning around its axis and securing the rotary sleeve due to the protrusions on the rotary sleeve in the frame sleeve, the shape of the hole on the frame sleeve repeats the shape of the end of the sleeve; sleeve-latch with the ability to install on the charge transfer and fixation on the cone-shaped protrusions of the rotary sleeve; extension sleeve and insulator sleeve.EFFECT: claimed invention allows to increase the reliability of the transmission of detonation from the booster (DTU) to the booster (DTU) due to their guaranteed coaxial arrangement during assembly.8 cl, 6 dwg, 1 tbl

Description

The invention relates to conducting perforating and blasting operations in various wells and, in particular, oil or gas wells of various types and can be used in devices for transmitting detonation of cumulative perforators.

The prior art multifunction booster sleeve for perforation systems, containing a cylindrical part with an axial hole for installing a booster, having on one side a collet clamp having an external conical part, and on the other a cover with a central hole and a shoulder, a nut with an internal conical part, screwed onto the threaded section, and in the axial hole of the cylindrical part of the sleeve there is a second flange for stopping the booster, and from the side opposite the nut, on the cylindrical section a second threaded section is inserted onto which the cover is screwed (RU 174197 U1, CL ЕВВ 43/117, publ. 06.10.2017).

The disadvantage of this technical solution is the design complexity, a sufficiently large number of mating parts and the need to install a booster of the same diameter.

The claimed invention has a simpler design, as well as fewer mating parts. As a result, the installation of a booster on a detonating cord is simplified. The claimed invention allows the use of boosters of various diameters.

The closest analogue to the claimed invention is a knock transfer unit (UPD), comprising a frame, an adapter, a detonating cord, a booster, a booster sleeve, which is made in the form of a disk and a cylindrical part with an axial hole for placing the booster, while the adapter has a through axis along the longitudinal axis an internal hole with a cylindrical groove for accommodating the booster sleeve and the detonating cord, while additionally equipped with a detonating cord, booster, booster sleeve, frame sleeve, while the boosters are installed s on detonating cords, the additional booster sleeve is made in the form of a disk and a cylindrical part with an axial hole to accommodate the additional booster and is placed in the inner hole of the frame sleeve from the side of the cylindrical groove on the end of the frame sleeve to accommodate the disk, and a recess is made on the end side of the adapter, forming a cylindrical guide inside it, and at the end of the sleeve of the frame in contact with the end side of the adapter, a groove is made with an external diameter equal to the diameter at the recess, and on the outside on the middle part of the carcass sleeve, an annular thickening is made, which is integral with the carcass sleeve (RU 2386793 C1, cl. ЕВВ 43/117, publ. 04/20/2010).

The disadvantage of the closest analogue is the complexity of the equipment of the knock transmission unit of the cumulative perforator.

The difference between the claimed invention and the closest analogue is that the claimed invention further comprises a rotary sleeve with the possibility of installation in the frame sleeve by axial movement to an annular protrusion and rotation around its axis and mounting the rotary sleeve due to protrusions on the rotary sleeve in the frame sleeve, hole shape on the sleeve of the frame repeats the shape of the end face of the sleeve rotary; latch sleeve with the possibility of installing on the transfer gear and fixing on the conical protrusions of the rotary sleeve; extension sleeve and insulating sleeve, as well as by installing snap-on bushings from the upper and lower frame along a single base of the central hole and adapter. This eliminates the axial displacement of the transfer charges and increases the reliability of the transmission of detonation.

The task to be solved by the claimed invention is the creation of a highly reliable knot transmission unit for the cumulative perforator.

The problem, which is claimed by the claimed invention, is solved by means of a knock transmission unit comprising a frame, an adapter, a detonating cord, a transfer charge, a booster sleeve, a frame sleeve with an annular protrusion, which further comprises a rotary sleeve with the possibility of installation in the frame sleeve by axial movement until the annular protrusion and rotation around its axis and the mounting of the rotary sleeve due to the protrusions on the rotary sleeve in the frame sleeve, repeating the hole shape on the frame sleeve repeating T shape pivot end of the sleeve; latch sleeve with the possibility of installing on the transfer gear and fixing on the conical protrusions of the rotary sleeve; extension sleeve and insulator sleeve.

The shape of the protrusions on the rotary sleeve form an angle Y ° with the plane of the end face of the annular protrusion, the range of which is from 3 ° to 20 °.

The number of protrusions on the rotary sleeve varies from 1 to 4.

The position of the transfer charge is limited by the protrusion of the rotary sleeve on one side and the protrusion of the latch sleeve on the other.

The centering of the transfer charge in the adapter is provided by the ribs of the latch sleeve.

The diameter of the ribs of the latch sleeve k varies from 12 to 50 mm, but does not exceed the diameter of the hole in the adapter D.

The latch bushings are centered on the center hole of the adapter with a diameter of D.

The latch bushings during assembly are guided into the central hole of the adapter along the tapered guide of the adapter.

The contacts and the sleeve-insulator provide the transit of the electrical circuit.

The invention is illustrated by figures, where:

FIG. 1 - View of the slewing sleeve in 7 projections;

FIG. 2 - View of the sleeve of the frame in 2 projections;

FIG. 3 - View of the latch sleeve in 4 projections;

FIG. 4 - View of the extension sleeve in 2 projections;

FIG. 5 - Installation diagram in a perforator;

FIG. 6 - Installation diagram with the possibility of transit of an electric circuit between sections of a perforator.

The following notation is used in the figures:

1 - Swivel sleeve;

2 - Frame sleeve;

3 - Ring ledge;

4 - Lugs of the rotary sleeve;

5 - Frame sleeve bore;

6 - The end face of the rotary sleeve;

7 - Cone-shaped protrusions;

8 - The latch sleeve;

9 - Extension sleeve;

10 - Windows of the latch sleeve and extension sleeve;

11 - grooves;

12 - Detonating cord;

13 - Adapter;

14 - Transfer charge (UPD);

15 - The protrusion of the rotary sleeve;

16 - The protrusion of the sleeve-latch;

17 - Ribs of the sleeve-latch;

18 - an electric wire;

19 - Contacts;

20 - Sleeve-insulator;

21 - Cone guide adapter

The rotary sleeve 1 (Fig. 1) is installed in the sleeve of the frame 2 (Fig. 2) by axial movement to the annular protrusion 3 and rotation around its axis. The rotary 1 sleeve in the sleeve of the frame 2 is fastened due to the shape of the projections 4 on the sleeve 1, forming an angle of Y ° (range of values from 3 ° to 20 °) with the plane of the end face of the annular projection 3. The number of projections 4 varies from 1 to 4 pieces .

The shape of the hole 5 on the sleeve of the frame 2 repeats the shape of the end face 6 of the sleeve of the rotary 1. The possibility of rotation of the sleeve of the rotary 1 relative to the sleeve of the frame is carried out due to sizes c, e, f (Fig. 1), while the size c is guaranteed to be larger than the thickness S of the sleeve of the frame 2, and size e is guaranteed to be smaller than size S. Size f provides preliminary rotation of sleeve 1 without locking. A protrusion shape 3 without dimension f is also permitted.

The conical protrusions 7 in FIG. 1, forming an angle β relative to the rotary sleeve 1 are designed to fix the sleeve-latch 8 (Fig. 3) and extension sleeve 9 (Fig. 4).

The locking sleeve-latch 8 on the rotary sleeve 1 is provided with a size k (Fig. 1), which is equal to or greater than the diameter D1 of the sleeve-latch 8. During fixing, the distance k between the conical protrusions 7 decreases due to the groove 11, then the conical protrusions 7 coincide with windows 10, the position of which relative to the protrusions 7 is determined by the size g. Geometrical dimensions may vary according to table 1.

The extension sleeve 9 is designed to set the desired length.

The set of parts 1, 8 and 9 in the assembly form a booster sleeve (UPD).

The thickness of the frame sleeve S is from 2 to 20 mm. Determines the reliability of the fixation of the booster sleeve (UPD) in the frame.

The diameter of the booster sleeve (diameter of the hole in the adapter) D eliminates the possibility of accumulation of the remains of the booster sleeve in the adapter.

Booster sleeve length from 75 to 300 mm. Determines the reliability of the detonation transmission and the possibility of accumulation of the remains of the booster sleeve in the adapter.

The booster sleeve (UPD) is designed for the transit of the ballistic circuit of the detonating cord 12 between the sections of the perforator in the adapter 13 and for fixing the charge of the transfer 14 (Fig. 5, 6).

The assembly of the detonation transmission unit is carried out in the following order: the detonating cord 1 is put on the detonating cord 12 passing through the carcass bushing 2 and fixed in the carcass bushing 2. Next, the detonating cord 12 is cut to the amount necessary to set the transfer charge 14. After transferring the charge to the transfer 14 puts on the sleeve-latch 8 and is fixed on the conical protrusions 7 of the rotary sleeve 1. The charge position of the transfer 14 is limited by the protrusion 15 (Fig. 1) on the one hand and the protrusion 16 (Fig. 3) of the sleeve-latch 8 on the other side ony.

The centering of the charge of the transfer 14 in the adapter 13 is provided by the ribs 17 (Fig. 3). The diameter of the ribs 17 varies from 12 to 50 mm, but does not exceed the diameter in the adapter 13.

If it is necessary to transit the electric circuit with an electric wire 18 between the sections of the perforator (Fig. 6), contacts 19 are used, which are installed in the bushing-insulator 20.

To facilitate assembly on the adapter 13, conical guides of the adapter 21 are made.

The advantages of the claimed invention are:

- convenience and simplicity of equipment;

- the absence of the need for accurate measurement of the length of the detonating cord before trimming for subsequent compression of the booster (UPD);

- improving the reliability of the transfer of detonation from the booster (UPD) to the booster (UPD), due to their guaranteed coaxial arrangement during assembly, which is ensured by installing the booster bushings (UPD) on a single base - the central hole of the adapter. And also due to the fixation of the compressed booster (UPD) inside the booster sleeve, which eliminates the influence of the human factor on the reliability of knock transmission;

- the exception of the accumulation of the remains of the booster sleeve in the adapter hole due to the configuration of the cutouts on the carcass bushings made of sheet material, in conjunction with a central through hole, of a certain diameter, in the adapter. This in turn facilitates the preparation of the adapter for reuse.

Claims (8)

1. The knock transmission unit comprising a frame, an adapter, a detonating cord, a transfer charge, a booster sleeve, a frame sleeve with an annular protrusion, contacts, characterized in that it further comprises a rotary sleeve with the possibility of installation in the frame sleeve by axial movement to the annular protrusion and rotation around its axis and fixing the rotary sleeve due to the protrusions on the rotary sleeve in the frame sleeve, the shape of the hole on the frame sleeve repeats the shape of the end face of the rotary sleeve; latch sleeve with the possibility of installing on the transfer gear and fixing on the conical protrusions of the rotary sleeve; extension sleeve and insulator sleeve. 2. The knock transmission unit according to claim 1, characterized in that the shape of the protrusions on the rotary sleeve form an angle Y ° with the plane of the end face of the annular protrusion, the range of which is from 3 ° to 20 °. 3. The knock transmission unit according to claim 1, characterized in that the number of protrusions on the rotary sleeve varies from 1 to 4. 4. The knock transmission unit according to claim 1, characterized in that the position of the transfer charge is limited by the protrusion of the rotary sleeve on one side and the protrusion of the latch sleeve on the other. 5. The knock transmission unit according to claim 1, characterized in that the centering of the transfer charge in the adapter is provided by the ribs of the latch sleeve. 6. The knock transmission unit according to claim 5, characterized in that the diameter of the ribs of the latch sleeve varies from 12 to 50 mm, but does not exceed the diameter of the hole in the adapter. 7. The knock transmission unit according to claim 1, characterized in that the latch bushings during assembly are guided into the central hole of the adapter along the conical guide of the adapter. 8. The knock transmission unit according to claim 1, characterized in that the contacts and the sleeve-insulator provide transit of the electrical circuit.

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