A temperature-resistant and pressure-resistant impact-initiated detonator for perforating oil and gas wells

Abstract

The utility model relates to a kind of oil and gas well perforation temperature-resistant pressure-resistant impact initiation detonator of bulkhead initiation, and the primer (1) is coaxially fixed in primer seat (2), primer seat (2) bottom boss design, it is firm when being beneficial to with base detonator (6) bayonet joint, shell (3) top is designed into the structure of shell and class body integration, it is the protective effect of impact protection to primer (1), and it is the effect of pressure resistance, shell (3) is also equipped with two grooves, when using, can install sealing ring and play the role of pressure resistance, shell (3) side's excitation direction mark (5), it has the effect of reminding, warning to user, the outer thread of inner sleeve (4) is screwed into the inner thread hole of shell (3) bottom, realize product through inner and outer thread screw joint and make primer and shell inner bulkhead top close tightly.When firing pin force impact bulkhead, simultaneously impact primer and lower base detonator, realize product in high temperature and high pressure environment to lower level booster tube's transmission explosion in well.

Description

Technical Field

[0001] This utility model relates to a civilian detonator, and more particularly to a temperature- and pressure-resistant impact detonator for oil and gas well perforation that uses a partition for detonation. Background Technology

[0002] Currently, the high-temperature impact detonators used in oil and gas well perforation operations both domestically and internationally primarily employ a striking pin to detonate the primer. While this meets the requirements for high-temperature environments downhole, the potential for accidental impacts during operation can introduce unpredictable dangers.

[0003] Since collisions are prone to occur during the use of explosives in downhole perforation operations of oil and gas wells, the utility model adopts a baffle design, which can effectively protect the primer fire and solve the dangers caused by possible impacts during operation. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation. This invention aims to improve the temperature and pressure resistance of impact or pressure detonators, enhancing safety during use in complex environments. In this invention, the primer is solidified in the upper hole of the primer seat. The lower end of the primer seat is reliably connected to the base detonator via a bayonet. The ignition component is then placed inside the outer shell from the lower end. A small amount of temperature-resistant adhesive is applied to the outer thread of the inner sleeve, which is then screwed into the lower inner thread of the outer shell until flush with it and cured. This achieves the non-removability of the ignition component. Simultaneously, the through-hole design at the lower end of the inner sleeve facilitates reliable transmission of the detonation to the lower-level detonation tube.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation is disclosed. The detonator includes a primer, a primer seat, an outer shell, an inner sleeve, and a base detonator. The primer is cured in the hole of the primer seat with high-temperature resistant adhesive, and the primer is inserted into the hole of the primer seat with its nozzle facing downwards. The primer is coaxially fixed in position within the primer seat. The bottom of the primer seat has a boss design that is securely snapped into the base detonator. The top of the outer shell is an integral structure of the outer shell and baffle. The outer shell also has two grooves. The firing direction is marked on the side of the outer shell. The external thread of the inner sleeve is screwed into the internal thread hole at the bottom of the outer shell. The primer and the inner baffle of the outer shell are tightly connected by the internal and external threads.

[0007] The aforementioned temperature- and pressure-resistant impact detonator, which detonates via a partition, has a primer component internally filled with a ignition agent.

[0008] The aforementioned temperature and pressure resistant impact detonator, which detonates via a partition, has its joints coated with high-temperature resistant adhesive for curing. The primer seat and the base detonator are connected and fastened by a snap-fit ​​method to form an impact component.

[0009] The aforementioned detonator for perforation of oil and gas wells with a partition-initiated, temperature-resistant, and pressure-resistant impact detonator is described in which the impact component is installed into the housing from the bottom end of the outer shell until the upper end face of the primer seat is tightly attached to the inner partition of the housing. The outer thread of the inner sleeve is coated with high-temperature resistant adhesive and screwed into place from the inner thread hole at the bottom of the outer shell. The upper end face of the primer seat and the end face of the inner partition of the outer shell are tightly connected by screwing in the thread.

[0010] The advantages and effects of this utility model are:

[0011] This invention improves the temperature and pressure resistance of impact or pressure initiators, enhancing safety during use in complex environments. Its structural design includes: an outer shell, an inner sleeve, a primer holder, a primer, and a base detonator. The primer is cured in the upper hole of the primer holder, and the lower end of the primer holder is reliably connected to the base detonator via a bayonet. The ignition component is then placed inside the outer shell from the lower end. A small amount of heat-resistant adhesive is applied to the outer edge of the inner sleeve, which is then screwed into the lower inner thread of the outer shell until flush with it and cured, achieving non-removability of the ignition component. Simultaneously, the through-hole design at the lower end of the inner sleeve facilitates reliable transmission of the detonation to the lower-level detonation tube. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structural composition of this utility model.

[0013] Components shown in the diagram: 1. Primer, 2. Primer holder, 3. Outer shell, 4. Inner sleeve, 5. Excitation direction indicator, 6. Base detonator. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0015] Figure 1 As shown, a temperature- and pressure-resistant impact detonator includes a primer 1, a primer seat 2, a shell 3, an inner sleeve 4, a marking 5, and a base detonator 6. The primer 1 is cured in the hole of the primer seat 2 with high-temperature resistant adhesive, ensuring its coaxial fixation within the primer seat 2. The bottom protrusion design of the primer seat 2 facilitates a secure snap-fit ​​connection with the base detonator 6. The top of the shell 3 is designed as an integrated shell partition, providing impact protection for the primer 1 and pressure resistance. The shell 3 also has two grooves for installing sealing rings during use to enhance pressure resistance. The firing direction marking 5 on the side of the shell 3 serves as a reminder and warning to the user. The external thread of the inner sleeve 4 screws into the internal thread hole at the bottom of the shell 3, achieving a tight connection between the primer and the inner partition through the internal and external threads. When the firing pin impacts the partition, it simultaneously ignites the primer and the lower base detonator, enabling the product to transmit detonation to the lower-level detonating tube in the high-temperature and high-pressure environment underground.

[0016] The primer 1 is a primer component filled with ignition agent, which has the characteristic of immediately igniting the lower-level base detonator upon impact. The primer 1 is inserted into the hole of the primer seat 2 with its opening facing down. High-temperature resistant adhesive is applied to the surrounding seams for curing. The primer seat 2 and the base detonator 6 are connected and fastened by a snap-fit ​​method to form the impact component. The impact component is inserted into the housing from the bottom end of the outer shell until the upper end face of the primer seat 2 is flush with the inner partition of the housing 3. Then, a small amount of high-temperature resistant adhesive is applied to the external thread of the inner sleeve 4 and it is screwed into place through the internal thread hole at the bottom of the outer shell 3, so that the upper end face of the primer seat 2 and the end face of the inner partition of the outer shell 3 are tightly connected by screwing in the threads.

[0017] The working process of this utility model is as follows: In actual application, the product is assembled inside the lower end of the perforation gun connector. The lower stage of the product connects to the detonation tube for oil and gas wells, and the upper end of the connector contains the firing pin assembly and shear pin. When the force applied to the firing pin is large enough, the shear pin is sheared off. After being stressed, the firing pin moves in the direction of the ignition mark and quickly penetrates the partition at the top of the outer shell, thereby impacting and detonating the primer component at the other end through the partition. When the primer component is impacted, the internal propellant instantly converts from kinetic energy to chemical energy, and the interior of the base detonator instantly converts from deflagration to detonation, ultimately achieving reliable detonation of the lower-stage detonation tube after the base detonator is detonated.

Claims

1. A temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation, characterized in that, The detonator includes a primer (1), a primer seat (2), an outer shell (3), an inner sleeve (4), and a base detonator (6). The primer (1) is cured in the hole of the primer seat (2) with high-temperature resistant adhesive. The primer (1) is inserted into the hole of the primer seat (2) with its mouth facing down. The primer (1) is coaxially fixed in the position of the primer seat (2). The bottom of the primer seat (2) has a boss design, which is firmly connected to the base detonator (6). The top of the outer shell (3) is an integral structure of the outer shell partition. The outer shell (3) is also provided with two grooves. The excitation direction on the side of the outer shell (3) is marked (5). The external thread of the inner sleeve (4) is screwed into the internal thread hole at the bottom of the outer shell (3). The primer and the inner partition of the outer shell are tightly connected by the internal and external threads.

2. The temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation as described in claim 1, characterized in that, The primer (1) is a primer component filled with a firing agent.

3. The temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation as described in claim 1, characterized in that, The joint of the detonator is coated with high-temperature resistant adhesive for curing, and the primer seat (2) and the base detonator (6) are connected and fastened by a snap-fit ​​method to form an impact component.

4. The temperature- and pressure-resistant impact detonator for perforation in oil and gas wells with baffle detonation as described in claim 3, characterized in that, The impact component is installed into the housing from the bottom end of the housing until the upper end face of the primer (2) is close to the inner partition of the housing (3). The outer thread of the inner sleeve (4) is coated with high temperature resistant adhesive and screwed into place from the inner thread hole at the bottom of the housing (3). The upper end face of the primer (2) and the end face of the inner partition of the housing (3) are tightly connected by screwing in the thread.

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