Magnetoelectric detonator for perforating oil and gas wells

Abstract

A kind of oil and gas well perforating detonation magnetoelectric detonator, it is related to a kind of civil magnetoelectric detonator, including wire, safety plug, thimble, sealing plug, protective sleeve, electrode column, electrode steel ring, winding primary coil of magnetic ring, magnetic ring, aluminium sleeve, winding secondary coil of magnetic ring, rubber plug, ignition head, basic detonator, its characterized in that, protective sleeve and product inner magnetic ring primary coil one end are communicated by aluminium sleeve, constitute product negative pole;Electrode column and magnetic ring primary coil other end are welded together, constitute product positive pole;Positive and negative pole pass through thimble, wire and safety plug and form short-circuit structure;There is annular cavity between protective sleeve and basic detonator, safety device is equipped, and the lead-out detonating cord in perforating gun is inserted into annular cavity and overlapped with basic detonator.

Description

Technical Field

[0001] This utility model relates to a civilian magnetic detonator, and in particular to a magnetic detonator for initiating perforation in oil and gas wells. Background Technology

[0002] Currently, the magnetoelectric detonators used in oil fields are all long-legged types. They need to be straightened by another rubber component inside the gun head, and the leg needs to be connected by hand, which is cumbersome and unsafe. Due to the special internal space design of the gun, there is an urgent need for a magnetoelectric detonator with a single-angle contact structure that can be directly inserted into the gun and supported by a rubber component such as an outer sealing plug and protective sleeve. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetoelectric detonator for initiating perforation in oil and gas wells. The protective sleeve and one end of the primary coil of the inner magnetic ring are connected via an aluminum sleeve, forming the negative electrode. The electrode post is welded to the other end of the primary coil, forming the positive electrode. A short-circuit safety design, consisting of a pin, wire, and safety plug, eliminates the hazards of static electricity to the human body and ensures product safety.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A magnetoelectric detonator for initiating perforation in oil and gas wells includes a conductor, a safety plug, a pin, a sealing plug, a protective sleeve, an electrode post, an electrode steel ring, a primary coil wound with a magnetic ring, a magnetic ring, an aluminum sleeve, a secondary coil wound with a magnetic ring, a rubber plug, an ignition head, and a base detonator. The protective sleeve is connected to one end of the primary coil of the magnetic ring within the product via the aluminum sleeve, forming the negative electrode. The electrode post is welded to the other end of the primary coil of the magnetic ring, forming the positive electrode. The positive and negative electrodes are short-circuited by the pin, conductor, and safety plug. An annular cavity exists between the protective sleeve and the base detonator, equipped with a safety device. A detonating cord led out from the perforation gun is inserted into the annular cavity and overlaps with the base detonator.

[0006] The aforementioned magnetoelectric detonator for perforation initiation of oil and gas wells has an electrode post welded to one end of the primary coil wire of the magnetic ring as the positive pole, and the other end of the coil, after the insulation is removed, reliably contacts the inner wall of the aluminum casing under the pressure of the sealing plug.

[0007] In the aforementioned magnetic detonator for perforation initiation of oil and gas wells, after the electrode steel ring and protective sleeve are installed together, one end of the steel wire of the electrode steel ring is bent into the inner hole of the protective sleeve and makes close contact with the outer wall of the aluminum sleeve.

[0008] The aforementioned magnetoelectric detonator for perforation initiation of oil and gas wells has an electrode steel ring whose other end is bent outward at the outer end of the protective sleeve and perpendicular to the cylindrical surface of the protective sleeve. The bent end of the steel wire can make close contact with the inner wall of the gun head during use.

[0009] The aforementioned magnetic detonator for perforation initiation of oil and gas wells has a rubber plug with two parallel through holes. The two ends of the secondary coil wire of the magnetic ring pass through the two holes of the rubber plug and are pushed into the small-diameter hole of the aluminum sleeve. The plug is tightened with a closing tool to form an ignition component bridge plug. Bridge wires are welded to the bridge leg wires of the bridge plug and ignition powder is applied to them.

[0010] The aforementioned magnetic detonator for perforation initiation of oil and gas wells has one end of the conductor welded to the pin, the pin inserted into the safety plug, the safety plug inserted into the hole of the sealing plug, the pin in contact with the electrode post (positive pole), and the other end of the conductor wrapped around the electrode steel ring (negative pole) to form a short circuit.

[0011] The advantages and effects of this utility model are:

[0012] This invention eliminates the harmful effects of static electricity on detonators, eliminating the need for manual connection of wires and facilitating oil well perforation operations. The protective sleeve and one end of the primary coil of the inner magnetic ring are connected via an aluminum sleeve, forming the negative electrode. The electrode post is welded to the other end of the primary coil, forming the positive electrode. A short-circuit safety design, consisting of a pin, wire, and safety plug, eliminates the hazards of static electricity and ensures product safety. An annular cavity exists between the protective sleeve and the base detonator. During use, the safety device is removed, and the detonating cord led from the perforating gun is inserted into the annular cavity to connect with the base detonator. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Components in the diagram: 1. Wire; 2. Safety plug; 3. Pin; 4. Sealing plug; 5. Protective sleeve; 6. Electrode post; 7. Electrode steel ring; 8. Primary coil with wound magnetic ring; 9. Magnetic ring; 10. Aluminum sleeve; 11. Secondary coil with wound magnetic ring; 12. Rubber plug; 13. Ignition plug; 14. Basic detonator. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0016] Figure 1As shown, the countersunk short-circuit structure of the magnetoelectric detonator includes a wire 1, a safety plug 2, a pin 3, a sealing plug 4, a protective sleeve 5, an electrode post 6, an electrode steel ring 7, a primary coil wound with a magnetic ring 8, a magnetic ring 9, an aluminum sleeve 10, a secondary coil wound with a magnetic ring 11, rubber 12, a plug ignition head 13, and a base detonator 14. The protective sleeve and one end of the primary coil of the magnetic ring inside the product are connected through the aluminum sleeve to form the negative electrode of the product. The electrode post and the other end of the primary coil of the magnetic ring are welded together to form the positive electrode of the product. The positive and negative electrodes form a short-circuit structure through the pin, the wire, and the safety plug. There is an annular cavity between the protective sleeve and the base detonator, which is equipped with a safety device. The detonating cord led out from the perforation gun is inserted into the annular cavity and overlaps with the base detonator.

[0017] This novel magnetoelectric detonator features a coaxial, single-leg countersunk head structure. The sealing plug 4 has a 12.5mm gap between its end faces, preventing human hand contact with the electrode post 6. The electrode post 6 is welded to one end of the primary coil 8 of the magnetic ring, serving as the positive electrode. The other end of the coil, after removing its insulation, reliably contacts the inner wall of the aluminum sleeve 10 under the pressure of the sealing plug 4. After the electrode steel ring 7 is installed with the protective sleeve 5, one end of the steel wire of the electrode steel ring 7 is bent into the inner hole of the protective sleeve 5, making tight contact with the outer wall of the aluminum sleeve 10. The other end of the electrode steel ring 7 is bent outwards at the outer end of the protective sleeve 5, perpendicular to the cylindrical surface of the protective sleeve 5. The bent end of the steel wire can make tight contact with the inner wall of the detonator head during use, increasing conductivity reliability. The rubber plug 12 has two parallel through holes. The two ends of the secondary coil 11 of the magnetic ring pass through the two holes of the rubber plug 12 and are pushed into the small-diameter hole of the aluminum sleeve 10. A closing tool is used to tighten the plug, forming a bridge plug for the ignition component. Bridge wires are welded to the bridge leg wires of the bridge plug, and ignition powder is applied. Finally, one end of the wire 1 is welded to the ejector pin 3, the ejector pin 3 is inserted into the safety plug 2, and the safety plug is inserted into the hole of the sealing plug 4, so that the ejector pin is in contact with the electrode post 6 (positive pole), and the other end of the wire is wrapped around the electrode steel ring 7 (negative pole) to form a short circuit and ensure product safety. There is an annular cavity between the base detonator 14 and the protective sleeve 5. During the perforation operation, the safety device consisting of the ejector pin, wire and safety plug is pulled out, and the detonating cord led out from the perforation gun is inserted into the annular cavity to overlap with the base detonator 14, so as to achieve reliable detonation.

[0018] During assembly, two wires are wound around the magnetic ring 9 with a specific turns ratio, distinguishing the primary and secondary electrodes by different colors. The electrode post 6 is inserted into the sealing plug 4. The primary coil 8, wound around the magnetic ring, is then welded at one end to the electrode post as the positive electrode. The other end, after removing the insulation, is led out from the large-diameter end of the aluminum sleeve 10 and finally connected to the electrode steel ring 7 outside the protective sleeve, becoming the negative electrode. The secondary coil 11, wound around the magnetic ring, is passed through the small-diameter end of the aluminum sleeve and tightened to form the plug ignition head 13. The plug ignition head 13 is inserted into the base detonator 14 and tightened. Then, the entire component with the tightened base detonator is pushed into the protective sleeve 5 and into place. Finally, the safety plug 2 is inserted into the hole of the sealing plug, making the ejector pin 3 contact the positive electrode post 6, and the wire 1 is wound around the negative electrode steel ring 7, creating a short circuit and ensuring product safety.

[0019] The working process of this utility model is as follows: the electrode posts and spring electrode steel rings connected to the two ends of the primary coil of the magnetic ring are used as the input electrodes for product detonation. After the safety plug is removed and power is applied, the coil of the magnetic ring induces the electrical energy to be converted into magnetic energy and then into electrical energy, which finally detonates the basic detonator.

Claims

1. A magnetoelectric detonator for perforation initiation in oil and gas wells, comprising a conductor, a safety plug, a pin, a sealing plug, a protective sleeve, an electrode post, an electrode steel ring, a primary coil wound with a magnetic ring, a magnetic ring, an aluminum sleeve, a secondary coil wound with a magnetic ring, a rubber plug, an ignition head, and a basic detonator, characterized in that, The protective sleeve is connected to one end of the primary coil of the magnetic ring inside the product through an aluminum sleeve, forming the negative electrode of the product; the electrode post is welded to the other end of the primary coil of the magnetic ring, forming the positive electrode of the product; the positive and negative electrodes form a short-circuit structure through a pin, wire and safety plug; there is an annular cavity between the protective sleeve and the base detonator, which is equipped with a safety device, and the detonating cord led out from the perforating gun is inserted into the annular cavity and connected to the base detonator.

2. The magnetoelectric detonator for perforation initiation of oil and gas wells according to claim 1, characterized in that, The electrode post (6) is welded to one end of the wire of the primary coil (8) of the magnetic ring as the positive pole, and the other end of the coil is reliably in contact with the inner wall of the aluminum sleeve (10) after the insulation is removed and the sealing plug (4) is squeezed.

3. The magnetoelectric detonator for perforation initiation of oil and gas wells according to claim 1, characterized in that, After the electrode steel ring (7) and the protective sleeve (5) are installed together, the steel wire at one end of the electrode steel ring (7) is bent into the inner hole of the protective sleeve (5) and comes into close contact with the outer wall of the aluminum sleeve (10).

4. The magnetoelectric detonator for perforation initiation of oil and gas wells according to claim 1, characterized in that, The other end of the electrode steel ring (7) is bent outward at the outer end of the protective sleeve (5) and perpendicular to the cylindrical surface of the protective sleeve (5). The bent end of the steel wire can be in close contact with the inner wall of the gun head during use.

5. The magnetoelectric detonator for perforation initiation of oil and gas wells according to claim 1, characterized in that, The rubber plug (12) has two parallel through holes. The two ends of the wire of the secondary coil (11) of the magnetic ring pass through the two holes of the rubber plug (12) and are pushed into the small diameter hole of the aluminum sleeve (10). The plug is tightened with a closing tool to form an ignition component bridge plug. Bridge wires are welded on the bridge leg wires of the bridge plug and ignition powder is applied.

6. The magnetoelectric detonator for perforation initiation of oil and gas wells according to claim 1, characterized in that, One end of the wire (1) is welded to the ejector pin (3), the ejector pin (3) is inserted into the safety plug (2), the safety plug is inserted into the hole of the sealing plug (4), the ejector pin is in contact with the electrode post (6), and the other end of the wire is wrapped around the electrode steel ring (7) to form a short circuit.

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