Downhole performance testing device for punching bomb

Abstract

The utility model discloses a punching bullet downhole performance testing device which comprises a cable, a perforation bridle, a three-parameter logging instrument, a perforator and a target bin which are sequentially connected from top to bottom, the top end face of the target bin is provided with a positioning hole, a punching bullet is installed in the positioning hole, the bottom end face of the target bin is provided with an installation hole, and the installation hole is communicated with the perforation bridle. An upper target piece, a lower target piece and a punching bullet which are arranged up and down are mounted in the mounting hole, the upper target piece and the lower target piece are coaxially arranged, an isolation plate is arranged between the bottom of the positioning hole and the top of the mounting hole, the thickness of the isolation plate is equal to the wall thickness of the perforator for the construction well, a detonator and a detonating cord are arranged in the perforator, and the detonator is connected with the punching bullet through the detonating cord. The hole diameter of the punching bullet in an underground oil pipe and the penetration depth of the punching bullet in a casing pipe are truly reflected, the accuracy of a detection result is improved, normal use of equipment is guaranteed, and the reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well perforation technology, and in particular to a downhole performance testing device for a perforating bullet. Background Technology

[0002] In response to the rapid decline in production and even cessation of production due to fluid accumulation in some wells in acidic gas fields of the Sichuan Basin after water breakthrough, gas lift is currently an effective technology for inducing flow and continuous drainage of fluid-accumulating gas wells. However, gas lift cannot be implemented if the production tubing is not equipped with a gas lift valve. Operating the production tubing requires well control operations, which are not only costly but also extremely difficult and risky. Conventional drainage and gas production technologies are not feasible. Therefore, this paper proposes to establish annular air lift channels by drilling holes in the tubing through perforation operations, serving as gas injection and drainage channels.

[0003] Therefore, it is necessary to understand the diameter of the tubing orifice and the damage to the casing after the perforation operation. If the perforating projectile penetrates the casing, the consequences are extremely serious, causing severe situations such as pressure buildup in the annulus between the casing and the formation, and hydrogen sulfide leakage in the wellbore, which can directly lead to the abandonment of the production well. Currently, the performance of perforating projectiles is mainly tested by measuring the perforation data by firing the projectile at a steel target on the ground. This method cannot accurately reflect the perforation diameter of the projectile inside the downhole tubing or the penetration depth within the casing.

[0004] Therefore, accurately determining the diameter of the tubing hole and the extent of casing damage after punching operations is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a downhole performance testing device for perforating projectiles, which is delivered to a preset position downhole via cable to accurately reflect the perforation diameter of the perforating projectile in the downhole tubing and the penetration depth in the casing.

[0006] To solve the above-mentioned technical problems, this utility model provides a downhole performance testing device for perforating projectiles, comprising a cable, a perforating bridle, a three-parameter logging instrument, a perforator, and a target chamber connected sequentially from top to bottom. A positioning hole is provided on the top surface of the target chamber, and a perforating projectile is installed inside the positioning hole. An installation hole is provided on the bottom surface of the target chamber, and an upper target component and a lower target component are installed inside the installation hole. The perforating projectile, the upper target component, and the lower target component are coaxially arranged. An isolation plate is provided between the bottom of the positioning hole and the top of the installation hole. The thickness of the isolation plate is equal to the wall thickness of the perforator used in the drilling well. A detonator and a detonating cord are provided inside the perforator, and the detonator is connected to the perforating projectile through the detonating cord.

[0007] Preferably, a pressure plate for pressing the punch spring is installed at the top opening of the positioning hole, and an avoidance hole is provided in the center of the pressure plate.

[0008] Preferably, the upper target is an arc-shaped plate with its top groove facing the isolation plate, and the lower target is a cylinder with its bottom end connected to the bottom opening of the mounting hole, and the top end of the cylinder pressing against the bottom protrusion of the arc-shaped plate.

[0009] Preferably, a simulated hole is provided at the center of the top surface of the cylinder, and the depth of the simulated hole is equal to the gap between the downhole tubing and the casing of the construction well.

[0010] Preferably, the cylinder has a plurality of connecting holes arranged around its center, and the connecting holes axially penetrate the cylinder.

[0011] Preferably, the upper target is an alloy component, and the lower target is a casing steel grade material component.

[0012] Preferably, the perforator includes a perforating gun and a gun head mounted on the top of the perforating gun, and the target chamber is located at the bottom of the perforating gun.

[0013] Preferably, a detonator fixing frame is provided inside the gun head, the detonator is installed in the detonator fixing frame, and a detonating cord fixing frame is provided inside the sleeve, with the detonating cord wound around the detonating cord fixing frame.

[0014] Preferably, the bottom end of the perforating horse bridle is threaded to the top end of the three-parameter logging instrument, the bottom end of the three-parameter logging instrument is threaded to the top end of the perforator, the bottom end of the perforator is threaded to the target chamber, and the lower target is threaded to the mounting hole.

[0015] Preferably, a seal is provided at the connection point.

[0016] This utility model provides a downhole performance testing device for perforating projectiles, comprising, from top to bottom, a cable, a perforating bridle, a three-parameter logging instrument, a perforator, and a target chamber. A positioning hole is provided on the top surface of the target chamber, and a perforating projectile is installed inside the positioning hole. An installation hole is provided on the bottom surface of the target chamber, and an upper target component and a lower target component are installed inside the installation hole. The perforating projectile, the upper target component, and the lower target component are coaxially arranged. An isolation plate is provided between the bottom of the positioning hole and the top of the installation hole. The thickness of the isolation plate is equal to the wall thickness of the perforator used in the drilling well. A detonator and a detonating cord are provided inside the perforator, and the detonator is connected to the perforating projectile through the detonating cord.

[0017] In use, the entire perforation projectile downhole performance testing device is transported to the preset position downhole via cable. Parameters such as depth, temperature, and pressure are determined by measuring data using a three-parameter logging tool. A detonator is detonated via a cable on the surface, igniting the perforation projectile. After detonation, the entire perforation projectile downhole performance testing device is pulled out of the wellhead via cable. On the surface, the perforation diameter on the upper target and the penetration depth on the lower target are measured, accurately reflecting the actual perforation of the perforation projectile in the tubing and casing. This provides a true representation of the perforation diameter in the tubing and the penetration depth in the casing. The device is simple to use, rationally designed, and low-cost, reflecting the real working conditions in the perforation environment of oil and gas wells, improving the accuracy of testing results, ensuring normal equipment operation, and enhancing reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the perforator and target chamber in a specific embodiment of the perforating projectile downhole performance testing device provided by this utility model.

[0019] Figure 2 This is a schematic diagram of the target chamber in a specific embodiment of the perforated projectile downhole performance testing device provided by this utility model.

[0020] Figure 3 This is a schematic diagram of the overall structure of a specific embodiment of the downhole performance testing device for perforated bullets provided by this utility model.

[0021] Among them, cable 1, perforating bridle 2, three-parameter logging instrument 3, perforator 4, perforating gun 41, gun head 42, detonator 43, detonating cord 44, target chamber 5, positioning hole 51, punching bullet 52, mounting hole 53, isolation plate 54, upper target 55, lower target 56, simulation hole 561, connecting hole 562, pressure plate 57. Detailed Implementation

[0022] The core of this utility model is to provide a downhole performance testing device for perforating projectiles, which is transported to a preset position downhole via cable to accurately reflect the perforation diameter of the perforating projectile in the downhole tubing and the penetration depth in the casing.

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the perforator and target chamber in a specific embodiment of the perforating projectile downhole performance testing device provided by this utility model. Figure 2 This is a schematic diagram of the target chamber in a specific embodiment of the perforated projectile downhole performance testing device provided by this utility model. Figure 3 This is a schematic diagram of the overall structure of a specific embodiment of the downhole performance testing device for perforated bullets provided by this utility model.

[0025] This utility model provides a downhole performance testing device for perforating projectiles, comprising, from top to bottom, a cable 1, a perforating bridle 2, a three-parameter logging instrument 3, a perforator 4, and a target chamber 5. The three-parameter logging instrument 3 acquires downhole parameters such as depth, temperature, and pressure, and obtains environmental information about the device's location. The perforator 4 contains a detonator 43 and a detonating cord 44. The detonator 43 is connected to the perforating projectile 52 in the target chamber 5 via the detonating cord 44. The cable 1 passes through the components to trigger the detonator 43, which in turn triggers the perforating projectile 52. The ignition wire of the detonator 43 is connected to the bottom of the three-parameter logging instrument 3 via a sealing assembly, then connects to the perforating bridle 2 via the internal circuitry of the three-parameter logging instrument 3, and finally extends to the surface via the cable 1.

[0026] The top surface of the target chamber 5 is provided with a positioning hole 51, and a punching projectile 52 is installed in the positioning hole 51. The bottom surface of the target chamber 5 is provided with a mounting hole 53, and an upper target component 55 and a lower target component 56 arranged vertically are installed in the mounting hole 53. The positioning hole 51 and the mounting hole 53 are arranged coaxially, and thus the punching projectile 52, the upper target component 55 and the lower target component 56 are arranged coaxially. The positioning hole 51 and the mounting hole 53 are isolated from each other, that is, an isolation plate 54 is provided between the bottom of the positioning hole 51 and the top of the mounting hole 53. The thickness of the isolation plate 54 is equal to the wall thickness of the perforator for the construction well.

[0027] In use, the entire perforation projectile downhole performance testing device is transported to the preset position downhole via cable 1. The depth, temperature, and pressure parameters are determined by measuring data using the three-parameter logging tool 3. The detonator 43 is detonated via cable 1 on the surface, which in turn detonates the perforation projectile 52. After detonation, the entire perforation projectile downhole performance testing device is pulled out of the wellhead via cable 1. On the surface, the perforation diameter of the perforation projectile 52 on the upper target 55 and the penetration depth on the lower target 56 are measured. This accurately reflects the actual perforation of the perforation projectile 52 in the tubing and casing, providing a true representation of the perforation diameter and penetration depth of the perforation projectile 52 in the downhole tubing. The device is simple to use, rationally designed, and low-cost. It reflects the real working conditions under perforation environments in oil and gas wells, improving the accuracy of test results, ensuring normal equipment operation, and enhancing reliability.

[0028] Specifically, to ensure stable installation of the perforating projectile 52, the depth of the positioning hole 51 depends on the height of the perforating projectile 52. A pressure plate 57 is installed at the top opening of the positioning hole 51, and a clearance hole is provided in the center of the pressure plate 57. The perforating projectile 52 is fixed in the positioning hole 51 by the pressure plate 57, preventing the orientation of the perforating projectile 52 from changing during the well-running process and preventing the launch orientation of the perforating projectile 52 from deviating from the set orientation. The pressure plate 57 is connected to the top surface of the target chamber 5 by bolts. Of course, other connection methods can also be used, all of which are within the protection scope of this utility model.

[0029] In the perforated projectile downhole performance testing device provided in the specific embodiment of this utility model, the upper target 55 is specifically an arc-shaped plate with the top groove of the arc-shaped plate facing the isolation plate 54, and the lower target 56 is specifically a cylinder with a stepped shaft structure. The upper diameter is slightly smaller than the lower diameter, so that the lower part of the outer periphery of the cylinder is connected to the bottom opening of the mounting hole 53. There is a certain gap between the upper part of the outer periphery of the cylinder and the inner wall of the mounting hole 53, and the top of the cylinder presses against the bottom protrusion of the arc-shaped plate.

[0030] Furthermore, when there is no gap between the downhole tubing and casing in the construction well, the bottom protrusion of the arc-shaped plate is pressed between the top ends of the cylinder. When there is a gap between the downhole tubing and casing in the construction well, a simulated hole 561 is provided at the center of the top surface of the cylinder. The depth of the simulated hole 561 is equal to the gap value between the downhole tubing and casing in the construction well. The bottom protrusion of the arc-shaped plate presses against the top opening of the simulated hole 561 to adapt to different downhole environments.

[0031] Preferably, the cylinder is provided with a plurality of connecting holes 562 arranged around the center. The connecting holes 562 penetrate the cylinder axially, so that the target chamber 4 is connected to the fluid surface in the well. This can truly reflect the actual perforation of the perforating bullet in the tubing and casing. The upper target part 55 is an alloy part, and the lower target part 56 is a part of the corresponding casing steel grade material. Two or more connecting holes 562 can be provided, or the number and layout of the connecting holes 562 can be adjusted according to the situation. The material of each component is also within the protection scope of this utility model.

[0032] The perforator 4 includes a perforating gun 41 and a gun head 42 mounted on the top of the perforating gun 41, with a target chamber 5 mounted on the bottom of the perforating gun 41. Specifically, the bottom of the gun head 42 extends into the upper opening of the perforating gun 41, and the top of the target chamber 5 extends into the lower opening of the perforating gun 41. A detonator holder is provided inside the gun head 42, a detonator 43 is mounted on the detonator holder, a detonating cord holder is provided inside the sleeve, and a detonating cord 44 is wound around the detonating cord holder.

[0033] Based on the perforation shell downhole performance testing device provided in the above specific embodiments, the bottom end of the perforation horse bridle 2 is connected to the top end of the three-parameter logging instrument 3 by a thread, the bottom end of the three-parameter logging instrument 3 is connected to the top end of the perforator 4 by a thread, the bottom end of the perforator 4 is connected to the target chamber 5 by a thread, and the lower target 56 is connected to the mounting hole 53 by a thread. At the same time, a sealing element is provided at the connection, and a sealing ring is provided as a matching element.

[0034] The above provides a detailed description of the downhole performance testing device for perforated bullets provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A downhole performance testing device for a punched out well, characterized in that, The utility model provides a kind of target storehouse, including cable (1) connected in turn from top to bottom, perforating horse collar (2), three-parameter logging instrument (3), perforator (4) and target storehouse (5), the top end surface of the target storehouse (5) is provided with positioning hole (51), punch bullet (52) is installed in the positioning hole (51), the bottom end surface of the target storehouse (5) is provided with mounting hole (53), upper target piece (55) and lower target piece (56) are installed in the mounting hole (53) and arranged in up and down, the punch bullet (52), the upper target piece (55) and the lower target piece (56) are coaxially arranged, the bottom of the positioning hole (51) and the top of the mounting hole (53) are provided with isolation plate (54), the thickness of the isolation plate (54) is equal to the wall thickness of perforator for construction well, the perforator (4) is provided with detonator (43) and detonating cord (44), the detonator (43) is connected the punch bullet (52) by the detonating cord (44).

2. The downhole performance testing device of claim 1, wherein, The top end opening of the positioning hole (51) is provided with a pressing plate (57) for pressing the punch bullet (52), and the center of the pressing plate (57) is provided with an avoiding hole.

3. The downhole performance testing device of claim 1, wherein, The upper target piece (55) is specifically an arc-shaped plate, and the top end groove of the arc-shaped plate faces the isolation plate (54); the lower target piece (56) is specifically a cylinder, the outer periphery of the bottom end of the cylinder is connected to the bottom end opening of the mounting hole (53), and the top end of the cylinder presses the bottom end protrusion of the arc-shaped plate.

4. The downhole performance testing device of claim 3, wherein, A simulation hole (561) is arranged at the center of the top end surface of the cylinder, and the depth of the simulation hole (561) is equal to the gap value between the downhole tubing and the casing of the construction well.

5. The downhole performance testing device of claim 4, wherein, A plurality of communication holes (562) are arranged around the center in the cylinder, and the communication holes (562) axially penetrate the cylinder.

6. The downhole performance testing device of claim 5, wherein, The upper target piece (55) is an alloy piece, and the lower target piece (56) is a casing steel grade material piece.

7. The downhole performance testing apparatus of claim 6, wherein, The perforator (4) includes a perforating gun (41) and a gun head (42) mounted at the top end of the perforating gun (41), and the target storehouse (5) is mounted at the bottom end of the perforating gun (41).

8. The downhole performance testing device of claim 7, wherein, The gun head (42) is provided with a detonator fixing frame, the detonator (43) is mounted on the detonator fixing frame, the detonating cord (44) is wound on the detonating cord fixing frame.

9. The downhole performance testing apparatus of any one of claims 1 to 8, wherein, The bottom end of the perforating horse collar (2) is connected to the top end of the three-parameter logging instrument (3) by screwing, the bottom end of the three-parameter logging instrument (3) is connected to the top end of the perforator (4) by screwing, the bottom end of the perforator (4) is connected to the target storehouse (5) by screwing, and the lower target piece (56) is connected to the mounting hole (53) by screwing.

10. The downhole performance testing apparatus of claim 9, wherein, A sealing element is arranged at the connection.

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