Cable perforation ignition detonation device

Abstract

The utility model relates to the technical field of oil logging perforation, and discloses a cable perforation ignition detonating device which comprises a detonating gun head with the upper end used for being connected with a magnetic locator and the lower end used for being connected with a perforating gun, and the upper end of the detonating gun head is provided with an internal thread; the upper end of the ignition head is used for being connected with a magnetic locator, the lower end of the ignition head is provided with an external thread matched with the internal thread and at least one sealing groove used for installing a sealing ring, and the sealing ring is used for sealing a gap between the detonating gun head and the ignition head. Compared with knocking installation in the prior art, the ignition head and the detonating gun head are in threaded connection, connection is tight, installation is convenient, the risk that a detonator is detonated by sparks possibly caused by knocking installation of the ignition head is avoided, and safety is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well logging perforation, and more specifically, to a cable perforation ignition and initiation device. Background Art

[0002] Cable perforation is a commonly used perforation method in the perforation completion method. When in use, first, the perforating charges and detonating cords are installed on the cartridge rack, the detonating cord and the detonator are connected, and one lead wire of the detonator is grounded through the cartridge rack and the other lead wire passes through the initiation gun head; then the initiation gun head is installed on the perforating gun and the lead wire is connected to the lower end of the igniter head; then the igniter head is tapped and installed into the initiation gun head; finally, the igniter and the initiation gun head are inserted into the magnetic locator, and the cable connected to the magnetic locator is lowered to the target layer.

[0003] However, the above cable perforation process has the following problems:

[0004] First, the igniter head and the initiation gun head are tightly sealed. When installing the igniter head, it is necessary to tap the base of the igniter head with a hammer to install it into the initiation gun head. The base of the igniter head is usually made of steel. If a metal hammer is directly used to tap, it is easy to generate sparks, which may accidentally detonate the detonator and cause an explosion on the ground. While a wooden hammer or a rubber hammer will weaken the impact force of the tap. Not only is it necessary to use greater force to tap the igniter head, but also the wooden hammer or rubber hammer is easily damaged.

[0005] Second, after the installation of the initiation gun head is completed, the detonator lead wire is connected to the igniter head. Since the space between the initiation gun head and the igniter head is narrow, it is very easy to squeeze the lead wire when installing the igniter head, resulting in ignition failure.

[0006] In summary, how to achieve the smooth and fast assembly of the ignition and initiation device is an urgent problem to be solved by those skilled in the art at present. Content of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a cable perforation ignition and initiation device, in which the igniter head and the initiation gun head are threadedly connected, with tight connection and convenient assembly, and effectively avoiding the risk of spark detonation of the detonator caused by tapping and installing the igniter head, and having strong safety and reliability.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A cable perforation ignition and initiation device, comprising:

[0010] An initiation gun head, the upper end of which is used to connect with a magnetic locator, the lower end of which is used to connect with a perforating gun, and an internal thread is provided at the upper end of the initiation gun head;

[0011] The ignition head has its upper end for connecting with the magnetic locator, and its lower end is provided with an external thread that mates with the internal thread and at least one sealing groove for installing a sealing ring. The sealing ring is used to seal the gap between the detonating gun head and the ignition head.

[0012] Preferably, an observation window communicating with the central through hole is provided in the middle of the detonating gun head, and a detachable plugging member is arranged in the observation window.

[0013] Preferably, the observation window is a round hole, and the axis of the observation window is perpendicular to the axis of the central through hole.

[0014] Preferably, the outer end face of the observation window for communicating with the outer peripheral surface of the detonating gun head is a horizontal plane.

[0015] Preferably, the plugging member includes a sealing plug. The sealing plug is threadedly connected to the observation window, and a sealing ring is arranged between the sealing plug and the observation window.

[0016] Preferably, after the sealing plug is threadedly installed in the observation window, the outer end face of the sealing plug is flush with the outer peripheral surface of the detonating gun head, and a fitting hole for cooperating with a wrench is provided on the outer end face of the sealing plug.

[0017] Preferably, the sealing groove is provided at one end of the external thread of the ignition head relatively close to the connection head, and the number of the sealing grooves is two.

[0018] Preferably, the sealing groove is provided at one end of the external thread of the ignition head relatively close to the connection head, and the sealing groove is arranged between the external thread and the ignition head base of the ignition head.

[0019] Preferably, the ignition head base of the ignition head is provided with at least two first fitting holes for plugging and cooperating with a hook wrench. After the hook wrench is inserted into the first fitting holes, the hook wrench can drive the ignition head to rotate.

[0020] Preferably, the outer peripheral part of the detonating gun head is provided with at least two second fitting holes for plugging and cooperating with a hook wrench. After the hook wrench is inserted into the second fitting holes, the hook wrench can drive the detonating gun head to rotate.

[0021] For the cable perforation ignition and detonation device provided by the present utility model, the ignition head and the detonating gun head are threadedly connected. Compared with the prior art of knocking installation, not only the connection is tight, but also the installation is convenient. Moreover, the risk of spark detonating the detonator caused by knocking the ignition head is avoided, and the safety is significantly improved. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0023] Figure 1 It is a schematic structural diagram of a specific embodiment of the cable perforating ignition and detonating device provided by the present invention.

[0024] Reference numerals:

[0025] 1 - Detonating gun head; 11 - Internal thread; 12 - Observation window; 2 - Ignition head; 21 - Ignition head base; 211 - First mating hole; 22 - External thread; 23 - Sealing groove; 24 - Wiring head; 3 - Sealing plug; 31 - Mating hole; 4 - Sealing ring. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] The core of the present invention is to provide a cable perforating ignition and detonating device. The ignition head and the detonating gun head are thread - connected, with a tight connection, convenient assembly, and effectively avoiding the risk of detonating the detonator due to sparks caused by knocking and installing the ignition head, and having strong safety and reliability.

[0028] The cable perforating ignition and detonating device provided by the present invention includes:

[0029] A detonating gun head 1, the upper end of which is used to connect with a magnetic locator and the lower end is used to connect with a perforating gun, and the upper end of the detonating gun head 1 is provided with an internal thread;

[0030] An ignition head 2, the upper end of which is used to connect with a magnetic locator, and the lower end is provided with an external thread 22 that mates with the internal thread and at least one sealing groove 23 for installing a sealing ring, and the sealing ring is used to seal the gap between the detonating gun head 1 and the ignition head 2.

[0031] Both ends of the detonating gun head 1 are connected to the magnetic locator and the perforating gun respectively, and it can adopt common detachable connection methods such as thread connection and snap connection; please refer to Figure 1, the upper end of the primer head 1 is provided with an external thread for threaded connection with the magnetic locator, and the lower end of the primer head 1 is provided with an external thread for threaded connection with the perforating gun.

[0032] The primer head 1 is provided with a central through hole axially penetrating therethrough. The central through hole is usually arranged as a stepped hole. A detonator head 2 is sleeved inside the central through hole on the side close to the upper end, and a detonator is installed on the side close to the lower end of the central through hole. The specific shape and size of the central through hole are determined by checking and calculating according to the structures and sizes of the detonator head 2 and the detonator in actual production and in combination with the design strength requirements of the primer head 1.

[0033] The detonator head 2 is installed at the upper end of the primer head 1. An internal thread 11 is provided on the side of the central through hole close to the upper end, and an external thread 22 matching the internal thread 11 is provided at the lower end of the detonator head 2. The detonator head 2 and the primer head 1 are threadedly connected, which not only has a tight connection, but also is convenient for installation, and further avoids the risk of detonating the detonator caused by knocking and installing the detonator head 2, and the safety is significantly improved.

[0034] The dimensions such as the pitch and length of the internal thread 11 and the external thread 22 are determined according to the design connection strength requirements of the detonator head 2 and the primer head 1 in actual production, and will not be elaborated here.

[0035] In order to better seal the primer head 1 and the detonator head 2, a sealing groove 23 for installing a sealing ring is provided at the lower end of the detonator head 2, and the gap between the central through hole and the outer peripheral surface of the detonator head 2 is sealed by the sealing ring.

[0036] The above-mentioned sealing groove 23 can be provided at one end of the external thread 22 relatively close to the primer head 1 during assembly, that is, one end of the external thread 22 relatively close to the connection head 24; it can also be provided at one end of the external thread 22 relatively far from the primer head 1 during assembly, that is, one end of the external thread 22 relatively far from the connection head 24. At this time, the sealing groove 23 needs to be provided between the external thread 22 and the detonator head base 21 of the detonator head 2; of course, the above-mentioned sealing groove 23 can also be provided at both ends of the external thread 22.

[0037] The number of the sealing grooves 23 is not limited, but is limited by the length of the detonator head 2 itself, and is mostly set to one or two. The size of the sealing groove 23 and the interval between two adjacent sealing grooves 23 are determined according to the sealing design requirements in actual production and the size of the detonator head 2.

[0038] For example, please refer to Figure 1 , the detonator head 2 is provided with a sealing groove 23 at one end of the external thread 22 relatively close to the connection head 24. The number of the sealing grooves 23 is two. The design of two layers of sealing rings can further improve the sealing performance between the detonator head 2 and the primer head 1.

[0039] During assembly, connect one end of the lead wire of the detonator to the cartridge rack for grounding, and pass the other end of the lead wire through the central through-hole of the detonating gun head 1. Gently tug the lead wire by hand to ensure that the lead wire is not pinched. Install the detonating gun head 1 on the perforating gun. Connect a wire to the terminal 24 of the ignition head 2, and connect the lead wire and the above-mentioned wire. Install a sealing ring in the sealing groove 23 of the ignition head 2, and apply a sealing grease such as silicone grease on the outside of the sealing ring. Screw the ignition head 2 to install the ignition head 2 into the central through-hole of the detonating gun head 1. Finally, connect the ignition head 2 and the magnetic locator, and the detonating gun head 1 and the magnetic locator in sequence, and sleeve the ignition head 2 and the detonating gun head 1 in the magnetic locator.

[0040] In this embodiment, the ignition head 2 and the detonating gun head 1 are threadedly connected. Compared with the prior art of percussion installation, not only is the connection tight, but it is also convenient for installation, and more importantly, it avoids the risk of detonating the detonator due to sparks caused by percussion installation of the ignition head 2, and the safety is significantly improved.

[0041] On the basis of the above embodiment, an observation window 12 communicating with the central through-hole can be provided in the middle of the detonating gun head 1, and a detachable plugging member is provided in the observation window 12.

[0042] Among them, the observation window 12 is used to lead out the lead wire of the detonator and the wire of the ignition head 2 for connection and observation, so as to avoid pinching the lead wire or wire when the ignition head 2 is installed in the detonating gun head 1.

[0043] The shape of the observation window 12 is not limited. For the convenience of processing the observation window 12, the observation window 12 is usually set as a round hole perpendicular to the outer peripheral surface of the detonating gun head 1, and the axis of the observation window 12 is perpendicular to the axis of the central through-hole. For the convenience of drilling operation on the circumferential surface, a horizontal machining surface can be provided on the outer peripheral part of the detonating gun head 1, and then the observation window 12 is machined on the horizontal machining surface. Therefore, the outer end surface of the observation window 12 for communicating with the outer peripheral surface of the detonating gun head 1 is a horizontal plane.

[0044] The size of the observation window 12 is determined according to the operating space required for actual production, so as to smoothly lead out the lead wire and the wire, and be able to smoothly put them back into the central through-hole after the two are connected.

[0045] The plugging member is used to plug the observation window 12 after wiring, so as to ensure the normal operation of the subsequent ignition and detonation processes. To ensure the connection stability after plugging, the plugging member and the observation window 12 can be threadedly connected or snap-connected.

[0046] During assembly, connect one end of the lead wire of the detonator to the cartridge rack for grounding, and pass the other end of the lead wire through the central through-hole of the detonating gun head 1. Gently tug the lead wire by hand to ensure that the lead wire is not pinched. Install the detonating gun head 1 on the perforating gun, and take out the lead wire at the observation window 12. Connect a wire to the terminal 24 of the ignition head 2, pass the wire through the central through-hole of the detonating gun head 1, and take out the lead wire at the observation window 12. Install a sealing ring in the sealing groove 23 of the ignition head 2, apply a sealing grease such as silicone grease on the outside of the sealing ring, and screw the ignition head 2 to install the ignition head 2 into the central through-hole of the detonating gun head 1. Connect the lead wire and the wire led out from the observation window 12, wrap them with electrical tape and plug them back into the central through-hole of the detonating gun head 1. Apply a sealing grease such as silicone grease on the outside of the plugging member, install the plugging member into the observation window 12 to seal the observation window 12. Finally, connect the ignition head 2 and the magnetic locator, and the detonating gun head 1 and the magnetic locator in sequence, and sleeve both the ignition head 2 and the detonating gun head 1 inside the magnetic locator.

[0047] In this embodiment, lead out the lead wire of the detonator and the wire of the ignition head 2 outside the observation window 12 for connection, and put the connected wire harness back into the central through-hole of the detonating gun head 1 after the ignition head 2 is installed in place, effectively avoiding pinching the lead wire or the wire when installing the ignition head 2, and further avoiding the ignition failure problem caused by the wire pinching problem, with high assembly quality.

[0048] Preferably, the plugging member may include a sealing plug 3, the sealing plug 3 is threadedly connected to the observation window 12, and a sealing ring 4 is provided between the sealing plug 3 and the observation window 12.

[0049] The above threaded connection structure is not only simple in structure and convenient for the processing of the detonating gun head 1, but also tightly connected and not easy to loosen; the sealing ring 4 further enhances the connection sealing performance between the two.

[0050] Please refer to Figure 1 , after the sealing plug 3 is threadedly installed on the observation window 12, the outer end face of the sealing plug 3 is flush with the outer peripheral surface of the detonating gun head 1. A mating hole 31 for cooperating with a wrench is provided on the outer end face of the sealing plug 3. Through the above mating hole 31, the wrench can drive the sealing plug 3 to rotate, thereby tightening or loosening the sealing plug 3.

[0051] On the basis of the above embodiment, in order to ensure that the ignition head 2 is screwed in place and for convenience and labor saving, it can be set that the ignition head base 21 of the ignition head 2 is provided with at least two first mating holes 211 for plugging and cooperating with a hook wrench. After the hook wrench is inserted into the first mating holes 211, the hook wrench can drive the ignition head 2 to rotate.

[0052] Please refer to Figure 1, the first mating hole 211 is provided on the ignition head base 21, at a relatively far distance from the external thread 22, which not only reserves sufficient operating space for the hook wrench but also avoids the close distance between the two affecting the machining quality and strength of the external thread 22.

[0053] Since the hook wrench is usually provided with two hooks, the number of the corresponding first mating holes 211 is at least two, and the angle between at least two first mating holes 211 is the same as the angle between the corresponding two hooks.

[0054] Specifically, it can be set that the ignition head base 21 is provided with two first mating holes 211, and the angle between the two first mating holes 211 is 180°, or it can be set that the ignition head base 21 is provided with four first mating holes 211, and the angle between adjacent two first mating holes 211 is 90°. Therefore, the first mating holes 211 are evenly distributed along the circumferential direction of the ignition head base 21.

[0055] On the basis of the above embodiments, considering that the detonating gun head 1 is threadedly connected to the perforating gun and the magnetic locator, and the size of the detonating gun head 1 is large and it is relatively difficult to rotate manually. To ensure the assembly stability, a second mating hole for plug-in cooperation with the hook wrench can be provided on the outer peripheral part of the detonating gun head 1. The number of the second mating holes is at least two. After the hook wrench is inserted into the second mating hole, the hook wrench can drive the detonating gun head 1 to rotate.

[0056] The shape and size of the second mating hole are determined according to the model of the mating hook wrench, and the model of the hook wrench needs to be determined according to the size of the detonating gun head 1, especially the outer diameter of the detonating gun head 1;

[0057] The above second mating hole can be arranged at the same axial position as the observation window 12, which not only facilitates the alignment process during machining but also can reduce the influence of the through observation window 12 on the center of gravity of the detonating gun head 1.

[0058] It should be noted that the first and second in the first mating hole 211 and the second mating hole mentioned in this application document are only used to distinguish the different positions and do not contain the limitation of the order.

[0059] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0060] The above has introduced in detail the cable perforating ignition and initiation device provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A cable perforating ignition and initiation device, characterized in that, Comprising: A detonating gun head (1), the upper end of which is used to connect with a magnetic locator and the lower end is used to connect with a perforating gun, and an internal thread (11) is provided at the upper end of the detonating gun head (1); An ignition head (2), the upper end of which is used to connect with the magnetic locator, an external thread (22) matching with the internal thread (11) and at least one sealing groove (23) for installing a sealing ring are provided at the lower end, and the sealing ring is used to seal the gap between the detonating gun head (1) and the ignition head (2).

2. The cable perforating ignition and initiation device according to claim 1, characterized in that, An observation window (12) communicating with a central through hole is provided in the middle of the detonating gun head (1), and a detachable plugging member is provided in the observation window (12).

3. The cable perforating ignition and initiation device according to claim 2, characterized in that, The observation window (12) is a round hole, and the axis of the observation window (12) is perpendicular to the axis of the central through hole.

4. The cable perforating ignition and initiation device according to claim 2, characterized in that, The outer end face of the observation window (12) for communicating with the outer peripheral surface of the detonating gun head (1) is a horizontal plane.

5. The cable perforating ignition and initiation device according to claim 2, characterized in that, The plugging member includes a sealing plug (3), the sealing plug (3) is threadedly connected with the observation window (12), and a sealing ring (4) is provided between the sealing plug (3) and the observation window (12).

6. The cable perforating ignition and initiation device according to claim 5, characterized in that, After the sealing plug (3) is threadedly installed in the observation window (12), the outer end face of the sealing plug (3) is flush with the outer peripheral surface of the detonating gun head (1), and a fitting hole for cooperating with a wrench is provided on the outer end face of the sealing plug (3).

7. The cable perforating ignition and initiation device according to any one of claims 1-6, characterized in that, The sealing groove (23) is provided at one end of the external thread (22) of the ignition head (2) relatively close to the terminal head (24), and the number of the sealing grooves (23) is two.

8. The cable perforating ignition and initiation device according to any one of claims 1-6, characterized in that, The sealing groove (23) is provided at one end of the external thread (22) of the ignition head (2) relatively close to the terminal head (24), and the sealing groove (23) is provided between the external thread (22) and the ignition head base (21) of the ignition head (2).

9. The cable perforating ignition and initiation device according to any one of claims 2-6, characterized in that A first fitting hole (211) for plugging and cooperating with a hook wrench is provided on the ignition head base (21) of the ignition head (2), the number of the first fitting holes (211) is at least two, and after the hook wrench is inserted into the first fitting hole (211), the hook wrench can drive the ignition head (2) to rotate.

10. The cable perforating ignition and initiation device according to claim 9, characterized in that, A second fitting hole for plugging and cooperating with a hook wrench is provided on the outer peripheral part of the detonating gun head (1), the number of the second fitting holes is at least two, and after the hook wrench is inserted into the second fitting hole, the hook wrench can drive the detonating gun head (1) to rotate.

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