Deep well petroleum perforating bullet

Abstract

The utility model discloses a deep well petroleum perforating bullet, relates to perforating bullet technical field, including perforating bullet body, lengthening spacing subassembly and explosion-proof subassembly, perforating bullet body includes perforating bullet upper casing and perforating bullet lower casing, lengthening spacing subassembly one end is connected with the perforating bullet upper casing, and the other end is connected with the perforating bullet lower casing, and the explosion-proof subassembly is connected with the perforating bullet upper casing and the perforating bullet lower casing. The perforating bullet body is arranged in the anti-explosion assembly, the anti-explosion assembly comprises an anti-explosion barrel and an anti-explosion cover, different perforating requirements are met by adjusting the volume in the perforating bullet, the perforating bullet is wrapped by arranging the anti-explosion barrel and the anti-explosion cover, and the anti-explosion effect is achieved. And the problem that the debris falls to the bottom of the perforation and the perforation is blocked can be solved while the debris is prevented from being sputtered to other parts in the casing pipe in a large area.

Description

Technical Field

[0001] This utility model relates to the field of perforation projectile technology, and in particular to a deep well oil perforation projectile. Background Technology

[0002] Currently, perforation in oil and gas wells is a key technology in oil exploration and development. The role of perforating projectiles is to penetrate the casing and cement sheath of the target layer in the well and penetrate deep into the target layer to form an effective seepage channel between the target layer and the wellbore, ensuring that the oil and gas well obtains the due production capacity.

[0003] The internal space of existing perforating ammunition casings is fixed, and the space within the perforating ammunition casing structure cannot be adjusted according to usage needs. Therefore, in order to meet different perforation requirements, it is necessary to prepare multiple perforating ammunitions of different models. Secondly, the jet of the propellant liner is sprayed in a fixed space, which can easily cause the propellant liner and thinner parts of the cartridge case to break. The broken metal will splash towards other parts of the casing inside the well under the impact force. In severe cases, it can easily cause large-area fractures in parts of the casing outside the perforation. Utility Model Content

[0004] The purpose of this invention is to provide a deep-well oil perforation projectile to solve at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deep well oil perforation projectile, comprising a perforation projectile body, an extended limiting component, and an explosion-proof component. The perforation projectile body includes an upper perforation projectile shell and a lower perforation projectile shell. The outer wall of the upper perforation projectile shell near the bottom is recessed inward to form a first concave ring, and the inner wall of the lower perforation projectile shell is recessed outward to form a second concave ring. The first concave ring and the second concave ring are matched. The extended limiting component is symmetrically arranged on both sides of the perforation projectile body. One end of the extended limiting component is connected to the upper perforation projectile shell, and the other end is connected to the lower perforation projectile shell. The perforation projectile body is disposed inside the explosion-proof component. The explosion-proof component includes an explosion-proof barrel and an explosion-proof cover, and the explosion-proof cover is threadedly connected to the explosion-proof barrel.

[0006] Preferably, the extended limiting assembly includes a fixed shell, a threaded rod, and a T-shaped slider. The fixed shell has a connecting block near the top on the side facing the projectile body. The side wall of the fixed shell below the connecting block has a limiting groove. The inner two side walls of the fixed shell each have a sliding groove. The threaded rod is inserted into the fixed shell from the top. Bearings are embedded in both the top and bottom walls of the fixed shell, and the bearings are fixedly sleeved near the two ends of the threaded rod. A knob is fixedly connected to the end of the threaded rod outside the fixed shell. The T-shaped slider has a threaded hole that is threadedly connected to the threaded rod inside the fixed shell. The two ends of the sliding wall of the T-shaped slider are slidably connected to the corresponding sliding grooves. The connecting wall of the T-shaped slider passes through the limiting groove and is fixedly connected to an arc plate. The arc plate is embedded in the lower shell of the projectile and matches the shell surface of the lower shell of the projectile.

[0007] Preferably, the range of movement of the lower casing of the perforated projectile driven by the arc plate will not exceed the extension height of the first concave ring.

[0008] Preferably, the top of the perforating projectile casing is provided with a detonating cord.

[0009] Preferably, a shaped charge liner is provided on the bottom wall of the lower casing of the perforated projectile.

[0010] Preferably, the explosion-proof barrel is symmetrically provided with slots that match the fixed shell, the inner wall of the explosion-proof barrel is provided with equally spaced resistance-increasing protrusions, the top of the outer wall of the explosion-proof barrel is provided with an external threaded ring, the top of the explosion-proof cover is provided with an opening that is larger than the top of the upper shell of the perforated bullet, and the bottom of the explosion-proof cover is provided with an internal threaded ring that matches the external threaded ring. When the explosion-proof cover is tightened on the explosion-proof barrel, the inner wall of the explosion-proof cover fits against the outer wall of the upper shell of the perforated bullet.

[0011] Preferably, the explosion-proof barrel and explosion-proof cover are made of high-strength metal material.

[0012] Preferably, the explosion-proof barrel has a mounting plate at the bottom and mounting holes are arranged in an array on the mounting plate.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. Simultaneously rotating two knobs in the same direction drives the threaded rod to rotate. The slide groove and the limiting groove limit the T-shaped slider, causing the T-shaped slider to move the arc plate. This causes the upper shell of the perforating bullet to extend from the lower shell of the perforating bullet, increasing the space inside the perforating bullet. By adjusting the space inside the perforating bullet, different perforation needs can be met, eliminating the need to prepare multiple different types of perforating bullets and improving economic efficiency.

[0015] 2. By installing an explosion-proof barrel and explosion-proof cover to enclose the perforating bullet, when the perforating bullet detonates, the fragments generated after the bullet casing and shaped charge liner break will be trapped inside the explosion-proof device, preventing the fragments from splashing onto other parts of the casing over a large area, thus protecting the safety of other parts. At the same time, the debris will be trapped inside the explosion-proof components, reducing the problem of debris falling to the bottom of the perforation hole and causing blockage, thus avoiding affecting the normal use of the perforation hole and greatly improving the practicality of the perforating bullet. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the explosion-proof cover of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the explosion-proof barrel of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the upper shell and lower shell of the perforating projectile of this utility model;

[0019] Figure 4 This is a cross-sectional view of the upper casing and lower casing of the perforating projectile of this utility model;

[0020] Figure 5 This is a cross-sectional view of the explosion-proof cover and explosion-proof barrel of this utility model;

[0021] Figure 6 This is a cross-sectional view of the fixing shell of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the T-shaped slider of this utility model;

[0023] Figure 8 This utility model Figure 6 Enlarged view of point A.

[0024] In the diagram: 1. Upper casing of the perforating projectile; 2. Explosion-proof cover; 3. Explosion-proof barrel; 4. Mounting hole; 5. Mounting plate; 6. External threaded ring; 7. Slot; 8. Detonating cord; 9. First concave ring; 10. Lower casing of the perforating projectile; 11. Molten charge liner; 12. Slide groove; 13. Second concave ring; 14. Fixed shell; 15. Knob; 16. Arc plate; 17. Resistance-increasing protrusion; 18. Internal threaded ring; 19. Connecting block; 20. Bearing; 21. T-shaped slider; 22. Threaded rod; 23. Limiting groove; 24. Threaded hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figure 1-8 The diagram shows a deep well oil perforation projectile, comprising a perforation projectile body, an extended limiting assembly, and an explosion-proof assembly. The perforation projectile body includes an upper perforation projectile shell 1 and a lower perforation projectile shell 10. The outer wall of the upper perforation projectile shell 1 near the bottom is recessed inward to form a first concave ring 9, and the inner wall of the lower perforation projectile shell 10 is recessed outward to form a second concave ring 13. The first concave ring 9 and the second concave ring 13 are matched. The extended limiting assembly is symmetrically arranged on both sides of the perforation projectile body. One end of the extended limiting assembly is connected to the upper perforation projectile shell 1, and the other end is connected to the lower perforation projectile shell 10. The perforation projectile body is disposed inside the explosion-proof assembly, which includes an explosion-proof barrel 3 and an explosion-proof cover 2. The explosion-proof cover 2 is threadedly connected to the explosion-proof barrel 3.

[0027] When it is necessary to adjust the volume inside the perforating projectile, turn both knobs 15 in the same direction simultaneously. The knobs 15 drive the two threaded rods 22 to rotate. Since the T-shaped slider 21 is limited by the sliding groove 12 and the limiting groove 23, under the action of the threaded hole 24, the rotation of the threaded rods 22 causes the T-shaped slider 21 to move downward along the sliding groove 12 and the limiting groove 23. This causes the T-shaped slider 21 to drive the arc plate 16 to move, causing the lower shell 10 of the perforating projectile to move downward. The first concave ring 9 of the upper shell 1 of the perforating projectile and the second concave ring 13 of the lower shell 10 of the perforating projectile are misaligned, causing the upper shell 1 of the perforating projectile to... The body extends, thereby increasing the volume inside the perforating bullet. The fixing shells 14 on both sides of the perforating bullet are aligned with the slots 7 on the explosion-proof barrel 3, and the perforating bullet is inserted into the explosion-proof barrel 3. The friction-increasing protrusions 17 can increase the friction with the upper shell 1 and the lower shell 10 of the perforating bullet, so that the perforating bullet is fixed inside the explosion-proof barrel 3. Then, the internal thread ring 18 on the explosion-proof cover 2 is tightened onto the external thread ring 6 on the explosion-proof barrel 3 to fix the explosion-proof cover 2, thereby completing the overall fixation of the perforating bullet. Finally, the device is installed inside the perforating gun by using fixing bolts through the mounting holes 4 on the mounting plate 5.

[0028] The extended limiting assembly includes a fixed housing 14, a threaded rod 22, and a T-shaped slider 21. A connecting block 19 is located near the top of the fixed housing 14 on the side facing the projectile body. A limiting groove 23 is provided on the side wall of the fixed housing 14 below the connecting block 19. Sliding grooves 12 are provided on both inner side walls of the fixed housing 14. The threaded rod 22 is inserted into the fixed housing 14 from the top. Bearings 20 are embedded in both the top and bottom walls of the fixed housing 14, and the bearings 20 are fixedly sleeved near both ends of the threaded rod 22. The ends of the threaded rod 22 are fixed outside the fixed housing 14. A knob 15 is fixedly connected. A threaded hole 24 is provided on the T-shaped slider 21 and the threaded hole 24 is threadedly connected to the threaded rod 22 inside the fixed shell 14. The two ends of the sliding wall of the T-shaped slider 21 are slidably connected to the corresponding sliding grooves 12. The connecting wall of the T-shaped slider 21 passes through the limiting groove 23 and is fixedly connected to an arc plate 16. The arc plate 16 is embedded in the lower shell 10 of the perforating bullet and matches the shell surface of the lower shell 10. The range of movement of the lower shell 10 driven by the arc plate 16 will not exceed the extension height of the first concave ring 9.

[0029] Simultaneously, the knobs 15 on both sides are turned in the same direction, and the bearing 20 facilitates the rotation of the threaded rod 22. The T-shaped slider 21 is limited by the sliding groove 12 and the limiting groove 23. The rotation of the threaded rod 22 will drive the T-shaped slider 21 to move along the sliding groove 12 and the limiting groove 23. The T-shaped slider 21 then drives the arc plate 16 to move, and the arc plate 16 thereby drives the lower housing 10 of the perforating bullet to move. At this time, the first concave ring 9 of the upper housing 1 of the perforating bullet and the second concave ring 13 on the lower housing 10 of the perforating bullet are misaligned and separated, so that the first concave ring 9 slowly extends from the second concave ring 13, thereby increasing the volume inside the perforating bullet.

[0030] The upper casing 1 of the perforating projectile is provided with a detonating cord 8 at the top, and the lower casing 10 of the perforating projectile is provided with a shaped charge liner 11 on the inner bottom wall.

[0031] The detonating cord 8 is used to detonate the explosive inside the perforating shell. When the perforating shell explodes, the shaped charge liner 11 will form a high-speed metal jet under the action of the high temperature, high pressure and detonation wave generated by the explosion, which will be used to extract oil from the well.

[0032] The explosion-proof barrel 3 has symmetrical slots 7 that match the fixed shell 14 inside. The inner wall of the explosion-proof barrel 3 has equally spaced resistance-increasing protrusions 17. The top of the outer wall of the explosion-proof barrel 3 has an external thread ring 6. The top of the explosion-proof cover 2 has an opening that is larger than the top of the upper shell 1 of the perforated bullet. The bottom of the explosion-proof cover 2 has an internal thread ring 18 that matches the external thread ring 6. When the explosion-proof cover 2 is tightened on the explosion-proof barrel 3, the inner wall of the explosion-proof cover 2 fits against the outer wall of the upper shell 1 of the perforated bullet. The explosion-proof barrel 3 and the explosion-proof cover 2 are made of high-strength metal material. The bottom of the explosion-proof barrel 3 has a mounting plate 5 and an array of mounting holes 4 on the mounting plate 5.

[0033] After aligning the fixed shells 14 on both sides of the perforating bullet with the slots 7 on the explosion-proof barrel 3, insert the perforating bullet into the explosion-proof barrel 3. The friction-increasing protrusions 17 increase the friction between the upper shell 1 and the lower shell 10 of the perforating bullet, thereby firmly fixing the perforating bullet inside the explosion-proof barrel 3. Then, screw the inner thread ring 18 of the explosion-proof cover 2 into the outer thread ring 6 on the explosion-proof barrel 3. After tightening the explosion-proof cover 2, the explosion-proof cover 2 fits against the outer wall of the upper shell 1 of the perforating bullet, further limiting and fixing the perforating bullet. Finally, use the fixing bolts to install the entire device into the perforating gun through the mounting holes 4 on the mounting plate 5 to complete the installation. The explosion-proof barrel 3 and the explosion-proof cover 2 are made of high-strength metal material to prevent the explosion-proof barrel 3 and the explosion-proof cover 2 from cracking due to the impact of the broken fragments of the perforating bullet.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deep-well oil perforation projectile, characterized in that: The device includes a perforating projectile body, an extended limiting assembly, and an explosion-proof assembly. The perforating projectile body includes an upper shell (1) and a lower shell (10). The outer wall of the upper shell (1) near the bottom is recessed inward to form a first concave ring (9). The inner wall of the lower shell (10) is recessed outward to form a second concave ring (13). The first concave ring (9) and the second concave ring (13) are matched. The extended limiting assembly is symmetrically arranged on both sides of the perforating projectile body. One end of the extended limiting assembly is connected to the upper shell (1) and the other end is connected to the lower shell (10). The perforating projectile body is disposed inside the explosion-proof assembly. The explosion-proof assembly includes an explosion-proof barrel (3) and an explosion-proof cover (2). The explosion-proof cover (2) is threaded onto the explosion-proof barrel (3).

2. The deep-well oil perforation projectile according to claim 1, characterized in that: The extended limiting assembly includes a fixed shell (14), a threaded rod (22), and a T-shaped slider (21). The fixed shell (14) has a connecting block (19) near the top on the side facing the projectile body. The side wall of the fixed shell (14) below the connecting block (19) has a limiting groove (23). The inner two side walls of the fixed shell (14) are respectively provided with sliding grooves (12). The threaded rod (22) is inserted into the fixed shell (14) from the top. The top and bottom walls of the fixed shell (14) are both embedded with bearings (20), and the bearings (20) are fixedly sleeved near the two ends of the threaded rod (22). At the position, a knob (15) is fixedly connected to the end of the threaded rod (22) outside the fixed shell (14). The T-shaped slider (21) is provided with a threaded hole (24) and the threaded hole (24) is threadedly connected to the threaded rod (22) inside the fixed shell (14). The two ends of the sliding wall of the T-shaped slider (21) are slidably connected to the corresponding sliding groove (12). The connecting wall of the T-shaped slider (21) passes through the limiting groove (23) and is fixedly connected to an arc plate (16). The arc plate (16) is embedded in the lower shell of the perforated bullet (10) and matches the shell surface of the lower shell of the perforated bullet (10).

3. The deep-well oil perforation projectile according to claim 2, characterized in that: The arc plate (16) will cause the lower casing (10) of the perforating bullet to move within a range that does not exceed the height of the extension of the first concave ring (9).

4. The deep-well oil perforation projectile according to claim 1, characterized in that: The top of the upper casing (1) of the perforating projectile is provided with a detonating cord (8).

5. A deep-well oil perforation projectile according to claim 1, characterized in that: The inner bottom wall of the lower casing (10) of the perforating projectile is provided with a shaped charge liner (11).

6. A deep-well oil perforation projectile according to claim 1, characterized in that: The explosion-proof barrel (3) is symmetrically provided with slots (7) that match the fixed shell (14). The inner wall of the explosion-proof barrel (3) is provided with resistance-increasing protrusions (17) at equal intervals. The top of the outer wall of the explosion-proof barrel (3) is provided with an external thread ring (6). The top of the explosion-proof cover (2) is provided with an opening that is larger than the top of the upper shell (1) of the perforated bullet. The bottom of the explosion-proof cover (2) is provided with an internal thread ring (18) that matches the external thread ring (6). When the explosion-proof cover (2) is tightened on the explosion-proof barrel (3), the inner wall of the explosion-proof cover (2) is in contact with the outer wall of the upper shell (1) of the perforated bullet.

7. A deep-well oil perforation projectile according to claim 6, characterized in that: The explosion-proof barrel (3) and explosion-proof cover (2) are made of high-strength metal material.

8. A deep-well oil perforation projectile according to claim 1, characterized in that: The explosion-proof barrel (3) has an installation plate (5) at the bottom and an array of installation holes (4) on the installation plate (5).

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