Sandstone target perforation and pressure testing device

Abstract

The utility model discloses a kind of sandstone target perforating under pressure testing device, including test cylinder, pressure adapter, and perforating shell body assembly;Sandstone target is built-in in test cylinder;Perforating shell body assembly is sequentially coaxially fixedly connected from left to right shell body, fixed seat and by ren;Shell body, fixed seat and by ren inside are all provided with transverse through and mutually interconnected passage;Second sealing assembly is fixedly arranged in the right side inside test cylinder, and perforating shell body assembly penetrates into second sealing assembly.Perforating shell is provided in the left side inside shell body, and the bullet tail of perforating shell is crimped with detonating cord one end, and detonating cord (305) other end enters by ren inside and is connected with magneto electric detonator.Effectively simulate the perforating bullet in reservoir high temperature, high pressure environment condition simultaneously, reduce the risk of pyrotechnics test, improve safety guarantee and work efficiency, suitable for large-scale use and popularization in industry.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas well perforation technology, and specifically relates to a sandstone target perforation pressure testing device. Background Technology

[0002] Sandstone target perforation is a key technology used in oil extraction to evaluate perforation effectiveness. By evaluating perforation effectiveness through sandstone target perforation, perforation design can be optimized and oil and gas well productivity can be improved.

[0003] In existing technologies, it is difficult to fully simulate the high-temperature and high-pressure environment of downhole drilling on the surface during experiments, making it difficult to quantitatively evaluate the damage to perforated sandstone and thus affecting the accuracy of test results. The inability to accurately test the perforation performance of perforating projectiles under high-temperature and high-pressure reservoir conditions hinders the development of a scientific basis for optimizing perforation design and improving perforation effectiveness. Utility Model Content

[0004] The purpose of this invention is to provide a sandstone target perforation pressure testing device to solve the problem that the lack of such testing devices in the prior art leads to low accuracy of existing testing methods and the inability to accurately test the perforation performance of perforating projectiles under high temperature and high pressure conditions in reservoirs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A sandstone target perforation pressure testing device includes a test cylinder, a pressure inlet adapter and a perforation shell assembly. A sandstone target is fixedly installed inside the test cylinder, and a protective cylinder is provided between the outer wall of the sandstone target and the inner wall of the test cylinder.

[0007] The pressure inlet adapter is coaxially disposed on the left side inside the test cylinder via the first sealing assembly, and the left end of the pressure inlet adapter extends out of the test cylinder.

[0008] The perforating cartridge assembly includes a cartridge case, a mounting base, and a union that are coaxially and fixedly connected from left to right. The cartridge case, mounting base, and union are all provided with transversely penetrating and interconnected channels. A second sealing assembly is fixedly installed on the right side of the inside of the test cylinder. The second sealing assembly has a through hole that matches the outer wall of the mounting base.

[0009] The perforating shell assembly is inserted into the second sealing assembly; the left end face of the shell is in contact with the right end face of the sandstone target; the fixing seat seal is inserted into the through hole of the second sealing assembly; and the union is located outside the test cylinder.

[0010] The cartridge case contains a perforated projectile on the left side. The tail of the perforated projectile is crimped to one end of the detonating cord, and the other end of the detonating cord enters the union and connects to the magnetoelectric detonator.

[0011] This utility model also has the following features:

[0012] Furthermore, an adjustment block is also provided inside the protective cylinder;

[0013] The adjustment block is located between the sandstone target and the pressure adapter.

[0014] Furthermore, the first sealing assembly includes a first sealing ring, the outer wall of which is sealed and fixedly connected to the inner wall of the left end of the test cylinder;

[0015] The first sealing ring is fixedly connected to the right end face of the first sealing ring, and the first sealing plate is provided with an adapter connector. The pressure adapter is fixedly connected to the adapter connector.

[0016] Furthermore, the second sealing assembly includes a second sealing ring, the outer wall of which is sealed and fixedly connected to the inner wall of the right end of the test cylinder;

[0017] The second sealing ring is fixedly connected to the left end face of the second sealing plate, and the second sealing plate has a through hole in the middle that matches the outer wall of the fixed seat.

[0018] Furthermore, it also includes a pressure ring;

[0019] The pressure ring is sealed and fixedly disposed in the annular space between the inner wall of the second sealing ring and the outer wall of the fixed seat.

[0020] Furthermore, a limiting ring is fixedly sleeved on the fixed base;

[0021] The left end face of the pressure ring is in contact with the right end face of the limiting ring.

[0022] Furthermore, the connection between the cartridge case and the fixed base, and between the fixed base and the union, are all plug-in connections;

[0023] A union pressure cap is provided at the connection between the fixed base and the union.

[0024] Furthermore, multiple sealing rings are provided between the outer wall of the first sealing plate and the inner wall of the test cylinder at corresponding positions;

[0025] Multiple sealing rings are provided between the outer wall of the second sealing plate and the inner wall of the test cylinder at corresponding positions.

[0026] Compared with the prior art, this utility model has the following technical effects:

[0027] This utility model relates to a sandstone target perforation pressure testing device designed to meet the experimental requirements of sandstone target perforation. Through a modular design concept and the separation of the perforation projectile and structural components, the device optimizes the product structure. While effectively simulating the high temperature and high pressure environment of the perforation projectile in the reservoir, it reduces the danger of the perforation projectile test, improves safety and work efficiency, and is suitable for large-scale industrial use and promotion. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the overall structure of the sandstone target perforation pressure testing device of this utility model;

[0029] Figure 2 This is a partial structural cross-sectional view of the sandstone target perforation pressure testing device of this utility model;

[0030] Figure 3 This is a cross-sectional view of the perforation shell assembly in this utility model.

[0031] The meanings of the labels in the diagram are as follows:

[0032] 1. Test cylinder; 2. Pressure inlet adapter; 3. Perforation shell assembly; 4. Sandstone target; 5. Protective cylinder; 6. First sealing assembly; 7. Second sealing assembly; 8. Adjusting block; 9. Pressure ring; 10. Limiting ring;

[0033] 301. Cartridge casing; 302. Mounting base; 303. Union; 304. Perforated projectile; 305. Detonating cord; 306. Magnetoelectric detonator; 601. First sealing ring; 602. First sealing plate; 701. Second sealing ring; 702. Second sealing plate. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the magnetic detonator uses a commonly known magnetic detonator.

[0035] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0036] like Figures 1 to 3 As shown, a sandstone target perforation pressure testing device is characterized by comprising a test cylinder 1, a pressure inlet adapter 2, and a perforation shell assembly 3. A sandstone target 4 is fixedly installed inside the test cylinder 1, and a protective cylinder 5 is provided between the outer wall of the sandstone target 4 and the inner wall of the test cylinder 1.

[0037] The pressure inlet adapter 2 is coaxially disposed on the left side inside the test cylinder 1 via the first sealing component 6, and the left end of the pressure inlet adapter 2 extends out of the test cylinder 1.

[0038] The perforating cartridge case assembly 3 includes a cartridge case 301, a fixed base 302, and a union 303 that are coaxially fixedly connected from left to right. The cartridge case 301, the fixed base 302, and the union 303 are all provided with transversely through channels. A second sealing component 7 is fixedly installed on the right side of the inside of the test cylinder 1. The second sealing component 7 is provided with through holes that match the outer wall of the fixed base 302.

[0039] The perforation shell assembly 3 penetrates the second sealing assembly 7; the left end of the shell 301 contacts the sandstone target 4, the second sealing assembly 7 is sealed outside the fixed base 302, and the union 303 is located outside the test cylinder 1.

[0040] A perforated projectile 304 is installed on the left side inside the cartridge case 301. The tail of the perforated projectile 304 is crimped to one end of the detonating cord 305, and the other end of the detonating cord 305 enters the interior of the union 303 and connects to the magnetic detonator 306.

[0041] The perforated cartridge case assembly 3 is an independent module designed according to the structural parameters of the gun string and is a disposable item.

[0042] The sandstone target 4 is made of large columnar Bailey sandstone that meets industry standards. It is mainly used to simulate the actual underground reservoir environment and is an experimental device for testing the perforation effect to evaluate the penetration ability and effect of the perforating projectile in different media.

[0043] As a preferred option, the protective cylinder 5 is also equipped with an adjustment block 8 inside;

[0044] Adjustment block 8 is positioned between sandstone target 4 and pressure inlet adapter 2, and it restricts the movement of sandstone target 4 in the left and right directions. Furthermore, adjustment blocks 8 of different specifications can be selected to meet experimental requirements.

[0045] During the perforation target test, the sandstone target 4 is placed inside the protective cylinder 5 of the test cylinder 1. An adjustment block 8 of appropriate size is selected based on the accommodate length of the sandstone target 4. After installing the first sealing assembly 6 and the second sealing assembly 7, the pressure inlet adapter 2 and the perforation shell assembly 3 are installed.

[0046] One end of the detonating cord 305 is crimped to the tail of the perforating projectile 304, and the other end of the detonating cord 305 is crimped to the magnetic detonator 62. The detonation circuit is then connected to the control room. The test cylinder 1 is heated and pressurized by an external device. After the set temperature and detonation pressure conditions are reached, the detonator is connected to detonate the perforating projectile 304. The perforating projectile 304 penetrates the sandstone target 4, thus completing the perforation test.

[0047] Remove sandstone target 4 and evaluate its penetration depth, aperture, and damage. Use the evaluation results as a theoretical basis to optimize the perforation design and improve the perforation effect.

[0048] Specifically, the first sealing assembly 6 includes a first sealing ring 601, the outer wall of the first sealing ring 601 being sealed and fixedly connected to the inner wall of the left end of the test cylinder 1;

[0049] The first sealing ring 601 is fixedly connected to the right end face of the first sealing plate 602, and the first sealing plate 602 is provided with an adapter connector. The pressure adapter 2 is fixedly connected to the adapter connector.

[0050] The second sealing assembly 7 includes a second sealing ring 701, the outer wall of the second sealing ring 701 is sealed and fixedly connected to the inner wall of the right end of the test cylinder 1;

[0051] The second sealing ring 701 is fixedly connected to the left end face of the second sealing plate 702. The second sealing plate 702 has a through hole in the middle, and the fixing seat 302 is sealed and fixedly inserted into the through hole.

[0052] As a preferred embodiment, it also includes a pressure ring 9;

[0053] The pressure ring 9 is sealed and fixedly installed in the annular space between the inner wall of the second sealing ring 701 and the outer wall of the fixed seat 302, thereby improving the overall structural strength.

[0054] A further preferred embodiment has a limiting ring 10 fixedly sleeved on the fixing base 302;

[0055] The left end face of the pressure ring 9 contacts the right end face of the limiting ring 10, restricting the left and right movement of the pressure ring 9.

[0056] As a preferred embodiment, the connection between the cartridge case 301 and the mounting base 302, and between the mounting base 302 and the union 303, are all plug-in connections.

[0057] A union cap 11 is provided at the connection between the fixed base 302 and the union 303.

[0058] This installation method can prevent the detonating cord 305 and the magnetic detonator 62 from twisting or rotating, thus avoiding unnecessary safety risks.

[0059] As a preferred embodiment, multiple sealing rings are provided between the outer wall of the first sealing plate 602 and the corresponding positions of the inner wall of the test cylinder 1;

[0060] Multiple sealing rings are provided between the outer wall of the second sealing plate 702 and the corresponding position of the inner wall of the test cylinder 1 to improve the sealing performance.

Claims

1. A pressure testing device for perforation of a sandstone target, characterized in that, It includes a test cylinder (1), a pressure adapter (2) and a perforation shell assembly (3). A sandstone target (4) is fixedly installed inside the test cylinder (1), and a protective cylinder (5) is provided between the outer wall of the sandstone target (4) and the inner wall of the test cylinder (1). The pressure inlet adapter (2) is coaxially disposed on the left side inside the test cylinder (1) via the first sealing assembly (6), and the left end of the pressure inlet adapter (2) extends out of the test cylinder (1); The perforating cartridge case assembly (3) includes a cartridge case (301), a fixing seat (302), and a union (303) that are coaxially fixedly connected from left to right. The cartridge case (301), the fixing seat (302), and the union (303) are all provided with transversely penetrating and interconnected channels. The test cylinder (1) is provided with a second sealing assembly (7) fixedly installed on the right side inside. The second sealing assembly (7) is provided with a through hole that matches the outer wall of the fixing seat (302). The perforating shell assembly (3) is inserted into the second sealing assembly (7); the left end face of the shell (301) is in contact with the right end face of the sandstone target (4); the fixing seat (302) seals the through hole inserted into the second sealing assembly (7); the union (303) is located outside the test cylinder (1). The inner left side of the cartridge case (301) is provided with a perforating projectile (304). The tail of the perforating projectile (304) is pressed into one end of the detonating cord (305), and the other end of the detonating cord (305) enters the interior of the union (303) and is connected to the magnetoelectric detonator (306).

2. The sandstone target perforation pressure testing device as described in claim 1, characterized in that, An adjustment block (8) is also provided inside the protective cylinder (5); The adjustment block (8) is located between the sandstone target (4) and the pressure adapter (2).

3. The sandstone target perforation pressure testing device as described in claim 2, characterized in that, The first sealing assembly (6) includes a first sealing ring (601), the outer wall of which is sealed and fixedly connected to the inner wall of the left end of the test cylinder (1); The first sealing ring (601) is fixedly connected to the right end face of the first sealing plate (602), and the first sealing plate (602) is provided with an adapter connector. The pressure adapter (2) is fixedly connected to the adapter connector.

4. The sandstone target perforation pressure testing device as described in claim 3, characterized in that, The second sealing assembly (7) includes a second sealing ring (701), the outer wall of which is sealed and fixedly connected to the inner wall of the right end of the test cylinder (1); The second sealing ring (701) is fixedly connected to the left end face of the second sealing plate (702), and the second sealing plate (702) has a through hole in the middle that matches the outer wall of the fixed seat (302).

5. The sandstone target perforation pressure testing device as described in claim 4, characterized in that, It also includes a pressure ring (9); The pressure ring (9) is sealed and fixedly disposed in the annular space between the inner wall of the second sealing ring (701) and the outer wall of the fixed seat (302).

6. The sandstone target perforation pressure testing device as described in claim 5, characterized in that, A limiting ring (10) is fixedly sleeved on the fixed base (302); The left end face of the pressure ring (9) is in contact with the right end face of the limiting ring (10).

7. The sandstone target perforation pressure testing device as described in claim 1, characterized in that, The connection between the cartridge case (301) and the fixed base (302), and between the fixed base (302) and the union (303) are all plug-in connections; A union cap (11) is provided at the connection between the fixed base (302) and the union (303).

8. The sandstone target perforation pressure testing device as described in claim 4, characterized in that, Multiple sealing rings are provided between the outer wall of the first sealing plate (602) and the inner wall of the test cylinder (1) at corresponding positions; Multiple sealing rings are provided between the outer wall of the second sealing plate (702) and the inner wall of the test cylinder (1) at corresponding positions.

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