A soluble perforating gun

Abstract

The present invention discloses a soluble perforating gun, belonging to the technical field of drilling and completion equipment. The gun includes an upper buffer short circuit and a lower buffer short circuit, and is characterized by further comprising an automatic control short circuit, a detonator short circuit, and a perforating short circuit. One end of the automatic control short circuit is connected to the upper buffer short circuit, and the other end of the automatic control short circuit is connected to the detonator short circuit. One end of the perforating short circuit is connected to the detonator short circuit, and the other end of the perforating short circuit is connected to the lower buffer short circuit. The automatic control short circuit includes an outer shell and a magnetic locator chip, a battery, a single-chip microcomputer, a pressure sensor, a power distributor, and an ignition circuit located within the outer shell. The battery is connected to the single-chip microcomputer, and the single-chip microcomputer is electrically connected to the pressure sensor, the power distributor, and the magnetic locator chip, respectively. The ignition circuit is connected to the power distributor. The present invention can provide low-cost, rapid perforating operations for casing perforation completion, is convenient to use, and has high time efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling and completion equipment, and in particular to a soluble perforating gun. Background Art

[0002] Casing perforation completion is to use a drill bit to drill through the oil layer to the designed well depth, then lower the oil layer casing to the bottom of the oil layer and inject cement to cement the well, and finally transport the perforating gun to the target layer to perforate. The perforating bullet penetrates the oil layer casing, cement sheath and penetrates the oil layer to a certain depth, thereby opening a channel for oil and gas to flow into the wellbore.

[0003] Cased perforation completions typically utilize either cable-conveyed or tubing-conveyed perforating techniques to deliver the perforating guns. The cable-conveyed technique uses a cable to transport the gun to the target formation. After depth calibration, the cable transmits the ignition signal to initiate perforation. Tubing-conveyed perforating uses tubing to connect the perforating guns to form a rigidly connected string. The guns are then transported to the target formation, and after depth calibration, radioactivity or magnetic positioning curves are measured within the tubing. A pressure initiator is then used to initiate perforation.

[0004] The Chinese patent document with publication number CN218182578U and publication date December 30, 2022 discloses a multifunctional perforating gun and downhole tool dual-control short circuit, including a connecting device housing, one end of the interior of the connecting device housing is embedded with a lower single-core contact female head, one end of the interior of the lower single-core contact female head close to the middle of the connecting device housing is plugged with an electrical connection and a sealed cabin, the other end of the interior of the lower single-core contact female head is plugged with a lower single-core contact male head by the outside of the connecting device housing, and the other end of the interior of the lower single-core contact female head is embedded with a threaded ring, the threaded ring The left side of the ring is connected to a straight three-contact female connector arranged inside the coupling device housing, the right side of the threaded ring is inserted with a straight three-contact male connector, the left end of the straight three-contact male connector extends into the interior of the straight three-contact female connector, the interior of the coupling device housing is provided with a three-core electrical connection plug located on the left side of the straight three-contact female connector, the interior of the coupling device housing is provided with a straight three-contact female connector frame located on the sides of the three-core electrical connection plug, the straight three-contact female connector and the straight three-contact female connector, and the middle part of the coupling device housing is provided with a wired selection electronic chip upper chip and a wired selection electronic chip lower chip.

[0005] The patent document discloses a multifunctional perforating gun and downhole tool with dual-control short-circuit technology. Through electrical connections and a sealed chamber, the system provides continuous and stable pressure protection and shock absorption for both the loading and unloading of wired selective firing electronic chips, ensuring their reuse. However, the process is complex and time-consuming, and complex engineering issues are costly to resolve. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a soluble perforating gun, which can provide low-cost and rapid perforating operations for casing perforation completion, is easy to use and has high time efficiency.

[0007] The present invention is achieved through the following technical solutions:

[0008] A soluble perforating gun includes an upper buffer short circuit and a lower buffer short circuit, and is characterized in that it also includes an automatic control short circuit, a detonator short circuit and a perforating short circuit, one end of the automatic control short circuit is connected to the upper buffer short circuit, the other end of the automatic control short circuit is connected to the detonator short circuit, one end of the perforating short circuit is connected to the detonator short circuit, and the other end of the perforating short circuit is connected to the lower buffer short circuit, the automatic control short circuit includes an outer shell and a magnetic locator chip, a battery, a single-chip microcomputer, a pressure sensor, a power distributor and an ignition circuit located therein, the battery is connected to the single-chip microcomputer, the single-chip microcomputer is electrically connected to the pressure sensor, the power distributor and the magnetic locator chip respectively, and the ignition circuit is connected to the power distributor.

[0009] The detonator short circuit comprises a shell, an electric detonator and a detonator fixing frame, the detonator fixing frame is fixed on the inner wall of the shell, the electric detonator is fixed on the detonator fixing frame, and the electric detonator is electrically connected to the ignition circuit.

[0010] The electric detonator comprises an ignition spring and a contact pin.

[0011] The perforating short circuit includes a shell and a detonating cord, a support ring, a perforating bullet, a bullet rack and a positioning ring located inside the shell. The support ring is arranged at one end of the shell, and the positioning ring is arranged at the other end of the shell. One end of the detonating cord is connected to the electric detonator, and the other end of the detonating cord passes through the support ring and is connected to the perforating bullet.

[0012] The bomb rack is located between the support ring and the positioning ring.

[0013] One end of the bomb rack is clamped on the support ring, and the other end of the bomb rack is clamped on the positioning ring.

[0014] The outer shell of the automatic control short circuit is coated with a coating formed by ceramics and fiber polymer.

[0015] The shell of the detonator short circuit is coated with a coating formed by ceramic and fiber polymer.

[0016] The outer shell of the perforated short circuit is coated with a coating formed by ceramic and fiber polymer.

[0017] The lower buffer short link comprises an open end and a closed end. The lower buffer short link is clamped on the perforating short link, and the open end of the lower buffer short link contacts the positioning ring.

[0018] The beneficial effects of the present invention are mainly manifested in the following aspects:

[0019] 1. In the present invention, one end of the automatic control short circuit is connected to the upper buffer short circuit, the other end of the automatic control short circuit is connected to the detonator short circuit, one end of the perforating short circuit is connected to the detonator short circuit, and the other end of the perforating short circuit is connected to the lower buffer short circuit. The automatic control short circuit includes an outer shell and a magnetic locator chip, a battery, a single-chip microcomputer, a pressure sensor, a power distributor and an ignition circuit located inside the outer shell. The battery is connected to the single-chip microcomputer, the single-chip microcomputer is electrically connected to the pressure sensor, the power distributor and the magnetic locator chip respectively, and the ignition circuit is connected to the power distributor. Compared with the existing technology, it can provide low-cost and rapid perforating operations for casing perforating completion, is easy to use, and has high timeliness.

[0020] 2. The present invention can slow down the transmission speed of the soluble perforating gun under the action of gravity by arranging the upper buffer short circuit and the lower buffer short circuit, and has a good buffering effect.

[0021] 3. In the present invention, the outer shell of the automatic control short circuit is coated with a coating formed by ceramics and fiber polymers, which can delay the dissolution rate of the automatic control short circuit before perforation.

[0022] 4. In the present invention, the shell of the detonator short circuit is coated with a coating formed by ceramics and fiber polymers, which can delay the dissolution rate of the detonator short circuit before perforating.

[0023] 5. In the present invention, the outer shell of the perforation short circuit is coated with a coating formed by ceramics and fiber polymers, which can slow down the dissolution rate of the perforation short circuit before perforation.

[0024] 6. The present invention can achieve the goal of eliminating the need to remove the perforating gun after perforation is completed. After a few days, the perforating gun will self-decompose into flowable and degradable products and return to the surface along with the drilling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, wherein:

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the automatic control short circuit of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a short-circuited detonator according to the present invention;

[0029] Figure 4 This is a structural diagram of the perforation short circuit of the present invention;

[0030] Markings in the figure: 1. Upper buffer short circuit; 2. Automatic control short circuit; 3. Detonator short circuit; 4. Perforator short circuit; 5. Lower buffer short circuit; 6. Magnetic locator chip; 7. Battery; 8. Single-chip microcomputer; 9. Pressure sensor; 10. Power distributor; 11. Ignition circuit; 12. Electric detonator; 13. Detonator fixing bracket; 14. Detonating cord; 15. Support ring; 16. Perforator bullet; 17. Bullet rack; 18. Positioning ring. DETAILED DESCRIPTION

[0031] Example 1

[0032] See also Figure 1 A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0033] This embodiment is the most basic implementation method. One end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5. The automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip computer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located in the outer shell. The battery 7 is connected to the single-chip computer 8, and the single-chip computer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively. The ignition circuit 11 is connected to the power distributor 10. Compared with the existing technology, it can provide low-cost and rapid perforating operations for casing perforating completion, which is convenient to use and has high timeliness.

[0034] Example 2

[0035] See also Figure 1-Figure 3A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0036] Preferably, the detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0037] This embodiment is a preferred implementation method. By providing the upper buffer short circuit 1 and the lower buffer short circuit 5, the transmission speed of the soluble perforating gun under the action of gravity can be slowed down, and a good buffering effect is achieved.

[0038] Example 3

[0039] See also Figure 1-Figure 4 A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0040] The detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0041] The electric detonator 12 includes an ignition spring and a contact pin.

[0042] Further preferably, the perforating short circuit 4 includes a shell and a detonating cord 14, a support ring 15, a perforating charge 16, a charge rack 17 and a positioning ring 18 located inside the shell. The support ring 15 is arranged at one end of the shell, and the positioning ring 18 is arranged at the other end of the shell. One end of the detonating cord 14 is connected to the electric detonator 12, and the other end of the detonating cord 14 passes through the support ring 15 and is connected to the perforating charge 16.

[0043] Example 4

[0044] See also Figure 1-Figure 4 A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0045] The detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0046] The electric detonator 12 includes an ignition spring and a contact pin.

[0047] The perforating short circuit 4 includes a shell and a detonating cord 14, a support ring 15, a perforating charge 16, a charge rack 17 and a positioning ring 18 located inside the shell. The support ring 15 is arranged at one end of the shell, and the positioning ring 18 is arranged at the other end of the shell. One end of the detonating cord 14 is connected to the electric detonator 12, and the other end of the detonating cord 14 passes through the support ring 15 and is connected to the perforating charge 16.

[0048] The bomb rack 17 is located between the support ring 15 and the positioning ring 18 .

[0049] One end of the bomb rack 17 is clamped on the support ring 15 , and the other end of the bomb rack 17 is clamped on the positioning ring 18 .

[0050] The outer shell of the automatic control short circuit 2 is coated with a coating formed by ceramic and fiber polymer.

[0051] This embodiment is another preferred implementation. The outer shell of the automatic control short circuit 2 is coated with a coating formed by ceramic and fiber polymer, which can slow down the dissolution rate of the automatic control short circuit 2 before perforation.

[0052] Example 5

[0053] See also Figure 1-Figure 4 A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0054] The detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0055] The electric detonator 12 includes an ignition spring and a contact pin.

[0056] The perforating short circuit 4 includes a shell and a detonating cord 14, a support ring 15, a perforating charge 16, a charge rack 17 and a positioning ring 18 located inside the shell. The support ring 15 is arranged at one end of the shell, and the positioning ring 18 is arranged at the other end of the shell. One end of the detonating cord 14 is connected to the electric detonator 12, and the other end of the detonating cord 14 passes through the support ring 15 and is connected to the perforating charge 16.

[0057] The bomb rack 17 is located between the support ring 15 and the positioning ring 18 .

[0058] One end of the bomb rack 17 is clamped on the support ring 15 , and the other end of the bomb rack 17 is clamped on the positioning ring 18 .

[0059] The outer shell of the automatic control short circuit 2 is coated with a coating formed by ceramic and fiber polymer.

[0060] The shell of the detonator short link 3 is coated with a coating formed by ceramic and fiber polymer.

[0061] This embodiment is another preferred implementation manner. The shell of the detonator short 3 is coated with a coating formed by ceramic and fiber polymer, which can delay the dissolution rate of the detonator short 3 before perforating.

[0062] Example 6

[0063] See also Figure 1-Figure 4A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0064] The detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0065] The electric detonator 12 includes an ignition spring and a contact pin.

[0066] The perforating short circuit 4 includes a shell and a detonating cord 14, a support ring 15, a perforating charge 16, a charge rack 17 and a positioning ring 18 located inside the shell. The support ring 15 is arranged at one end of the shell, and the positioning ring 18 is arranged at the other end of the shell. One end of the detonating cord 14 is connected to the electric detonator 12, and the other end of the detonating cord 14 passes through the support ring 15 and is connected to the perforating charge 16.

[0067] The bomb rack 17 is located between the support ring 15 and the positioning ring 18 .

[0068] One end of the bomb rack 17 is clamped on the support ring 15 , and the other end of the bomb rack 17 is clamped on the positioning ring 18 .

[0069] More preferably, the outer shell of the automatic control short circuit 2 is coated with a coating formed by ceramic and fiber polymer.

[0070] The shell of the detonator short link 3 is coated with a coating formed by ceramic and fiber polymer.

[0071] The outer shell of the perforation short circuit 4 is coated with a coating formed by ceramic and fiber polymer.

[0072] This embodiment is another preferred implementation. The outer shell of the perforating short circuit 4 is coated with a coating formed by ceramic and fiber polymer, which can slow down the dissolution rate of the perforating short circuit 4 before perforating.

[0073] Example 7

[0074] See also Figure 1-Figure 4A soluble perforating gun includes an upper buffer short circuit 1, a lower buffer short circuit 5, an automatic control short circuit 2, a detonator short circuit 3 and a perforating short circuit 4, one end of the automatic control short circuit 2 is connected to the upper buffer short circuit 1, and the other end of the automatic control short circuit 2 is connected to the detonator short circuit 3, one end of the perforating short circuit 4 is connected to the detonator short circuit 3, and the other end of the perforating short circuit 4 is connected to the lower buffer short circuit 5, the automatic control short circuit 2 includes an outer shell and a magnetic locator chip 6, a battery 7, a single-chip microcomputer 8, a pressure sensor 9, a power distributor 10 and an ignition circuit 11 located therein, the battery 7 is connected to the single-chip microcomputer 8, the single-chip microcomputer 8 is electrically connected to the pressure sensor 9, the power distributor 10 and the magnetic locator chip 6 respectively, and the ignition circuit 11 is connected to the power distributor 10.

[0075] The detonator short circuit 3 includes a shell, an electric detonator 12 and a detonator fixing frame 13 . The detonator fixing frame 13 is fixed on the inner wall of the shell. The electric detonator 12 is fixed on the detonator fixing frame 13 . The electric detonator 12 is electrically connected to the ignition circuit 11 .

[0076] The electric detonator 12 includes an ignition spring and a contact pin.

[0077] The perforating short circuit 4 includes a shell and a detonating cord 14, a support ring 15, a perforating charge 16, a charge rack 17 and a positioning ring 18 located inside the shell. The support ring 15 is arranged at one end of the shell, and the positioning ring 18 is arranged at the other end of the shell. One end of the detonating cord 14 is connected to the electric detonator 12, and the other end of the detonating cord 14 passes through the support ring 15 and is connected to the perforating charge 16.

[0078] The bomb rack 17 is located between the support ring 15 and the positioning ring 18 .

[0079] One end of the bomb rack 17 is clamped on the support ring 15 , and the other end of the bomb rack 17 is clamped on the positioning ring 18 .

[0080] The outer shell of the automatic control short circuit 2 is coated with a coating formed by ceramic and fiber polymer.

[0081] The shell of the detonator short link 3 is coated with a coating formed by ceramic and fiber polymer.

[0082] The outer shell of the perforation short circuit 4 is coated with a coating formed by ceramic and fiber polymer.

[0083] The lower buffer short circuit 5 includes an open end and a closed end. The lower buffer short circuit 5 is clamped on the perforating short circuit 4 , and the open end of the lower buffer short circuit 5 is in contact with the positioning ring 18 .

[0084] This embodiment is the best implementation method, which can achieve the goal that after perforating is completed, there is no need to remove the perforating gun. After a few days, it will self-decompose into flowable and degradable products and return to the surface with the drilling fluid.

[0085] The working principle of the present invention is as follows:

[0086] After the soluble perforating gun is dropped into the well, the battery 7 supplies power to the single-chip microcomputer 8, which in real time detects the well pressure detected by the pressure sensor 9. When the pressure exceeds the set depth calibration pressure, the single-chip microcomputer 8 controls the power distributor 10 to supply power to the magnetic locator chip 6, which starts depth calibration. The single-chip microcomputer 8 processes the signal from the magnetic locator chip 6 in real time. Once it detects that the soluble perforating gun has reached the target layer, the single-chip microcomputer 8 controls the power distributor 10 to instruct the ignition circuit 11 to supply power to the electric detonator 12, detonating the detonating cord 14 and then the perforating charge 16, completing automatic ignition and perforation.

[0087] The entire shell material of the soluble perforating gun is made of aluminum, calcium or magnesium metal and added with trace amounts of silicon, copper, manganese, zinc, indium, lithium, gallium or bismuth metal, so that after perforating, the soluble perforating gun will decompose into flowable degradation products under the action of the well fluid and return to the ground with the drilling fluid.

Claims

1. A soluble perforating gun, comprising an upper buffer short circuit (1) and a lower buffer short circuit (5), characterized in that: It also includes an automatic control short circuit (2), a detonator short circuit (3) and a perforation short circuit (4), one end of the automatic control short circuit (2) is connected to the upper buffer short circuit (1), the other end of the automatic control short circuit (2) is connected to the detonator short circuit (3), one end of the perforation short circuit (4) is connected to the detonator short circuit (3), and the other end of the perforation short circuit (4) is connected to the lower buffer short circuit (5), the automatic control short circuit (2) includes an outer shell and a magnetic locator chip (6), a battery (7), a single chip microcomputer (8), a pressure sensor (9), a power distributor (10) and an ignition circuit (11) located in the outer shell, the battery (7) is connected to the single chip microcomputer (8), the single chip microcomputer (8) is electrically connected to the pressure sensor (9), the power distributor (10) and the magnetic locator chip (6), respectively, and the ignition circuit (11) is connected to the power distributor (10); The detonator short circuit (3) comprises a shell, an electric detonator (12) and a detonator fixing frame (13), the detonator fixing frame (13) is fixed to the inner wall of the shell, the electric detonator (12) is fixed to the detonator fixing frame (13), and the electric detonator (12) is electrically connected to the ignition circuit (11); The electric detonator (12) includes an ignition spring and a contact pin; the single chip microcomputer (8) detects the well pressure detected by the pressure sensor (9) in real time. When the pressure exceeds the set depth calibration pressure, the single chip microcomputer (8) controls the power distributor (10) to supply power to the magnetic locator chip (6), and the magnetic locator chip (6) starts depth calibration.

2. The soluble perforating gun according to claim 1, characterized in that: The perforating short circuit (4) comprises a shell and a detonating cord (14), a support ring (15), a perforating charge (16), a charge rack (17) and a positioning ring (18) located inside the shell. The support ring (15) is arranged at one end of the shell, and the positioning ring (18) is arranged at the other end of the shell. One end of the detonating cord (14) is connected to the electric detonator (12), and the other end of the detonating cord (14) passes through the support ring (15) and is connected to the perforating charge (16).

3. The soluble perforating gun according to claim 2, characterized in that: The bomb rack (17) is located between the support ring (15) and the positioning ring (18).

4. The soluble perforating gun according to claim 3, characterized in that: One end of the bomb rack (17) is clamped on the support ring (15), and the other end of the bomb rack (17) is clamped on the positioning ring (18).

5. The soluble perforating gun according to claim 1, characterized in that: The outer shell of the automatic control short circuit (2) is coated with a coating formed by ceramic and fiber polymer.

6. The soluble perforating gun according to claim 1, characterized in that: The shell of the detonator short circuit (3) is coated with a coating formed by ceramic and fiber polymer.

7. The soluble perforating gun according to claim 1, characterized in that: The outer shell of the perforated short circuit (4) is coated with a coating formed by ceramic and fiber polymer.

8. The soluble perforating gun according to claim 2, characterized in that: The lower buffer short circuit (5) comprises an open end and a closed end. The lower buffer short circuit (5) is clamped on the perforating short circuit (4), and the open end of the lower buffer short circuit (5) is in contact with the positioning ring (18).

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