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Case circular discontinuous energy concentrating jet flow cracker

A concentrated energy jet, discontinuous technology, applied in the direction of mining fluid, wellbore/well components, blasting, etc., to achieve the effects of small vibration, lower production costs, and less priming charge

Inactive Publication Date: 2014-08-13
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no special cutting and fracturing device for forming effective network fractures has been found so far.

Method used

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  • Case circular discontinuous energy concentrating jet flow cracker
  • Case circular discontinuous energy concentrating jet flow cracker
  • Case circular discontinuous energy concentrating jet flow cracker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 with figure 2 , choose a cylindrical aluminum tube with an outer diameter of φ10mm, a wall thickness of 1mm, and a length of 80mm as the cartridge case 3, and press out a tapered groove 4 with a depth of 1.5mm every 13mm on the outer surface of the cartridge case 3, the length of the busbar 2.82mm, cone angle 90°, a total of 5 grooves, 5mm and 10mm are reserved for the lower bottom and upper top respectively. Passivated RDX is used as the explosive 5 in the cartridge case, and the total charge is 6g. Both ends of the cartridge case 3 are provided with threaded structures to facilitate the connection with the cover. There is a through hole in the middle of the upper cover 1, from which the detonating cord 2 as the detonating device is drawn. Internal thread is arranged on the endoporus of last cover 1, and it cooperates with the external thread on the shell hole wall; There is external thread on the outer circle surface of lower cover 6, and it cooperat...

Embodiment 2

[0028] see image 3 , the outer diameter is φ12mm, the wall thickness is 1mm, and the cylindrical copper tube with a length of 80mm is used as the shell 3, and the aluminum block with a through hole in the middle is used as the charge layerer 7, and three lines are pressed on the outer surface of the shell 3. For the semicircular groove 4 of φ4mm, the spacing between the two grooves is 20mm, and 8mm and 12mm are reserved for the lower bottom and the upper top respectively. Titanium ammonium is housed in the shell as charge 5, and the total charge is 3g. Both ends of the cartridge case 3 are provided with threaded structures to facilitate the connection with the cover. There is a through hole in the middle of the upper cover 1, from which the detonating cord 2 as the detonating device is drawn. There is external thread on the outer circular surface of lower cover 6, and it cooperates with the internal thread on the shell hole wall.

[0029] Use the product of this embodiment...

Embodiment 3

[0032] see Figure 4, choose a cylindrical copper tube with an outer diameter of φ16mm, a wall thickness of 1mm, and a length of 320mm as the shell 3, and press a tapered groove 4 with an outer diameter of 4mm and a depth of 1.5mm every 20mm, the length of the busbar is 2.21mm, and the cone top The angle is 60°, 14 in total. With RDX: emulsion explosive = 80%: 20% as the main charge, detonate directly with the nonel.

[0033] Using the 14 rows of casing circumferential discontinuous energy-concentrating jet crackers of this embodiment to carry out a cutting blast simulation test on a cement pier cast in a seamless steel pipe: a deep hole with a diameter of φ25mm and a length of 500mm is processed in the center of the cement pier , 6 deep holes with a diameter of φ25mm and a length of 500mm are processed on a circle with a center diameter of φ70mm, and the diameter of the cement pier is φ310mm and a length of 500mm. Put the above shell circumferential groove explosion shaped ...

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Abstract

The invention belongs to the technical field of engineering blasting and ammunition engineering. A circular discontinuous energy concentrating jet flow cracker comprises a round tube-shaped case, an end cover and a detonating unit; explosives are mounted inside the cavity the round tube-shaped case; the detonating unit is leaded out of the case through a hole formed in the end cover; the outer round surface of the round tube-shaped case is provided with circular grooves which are parallel to one another, and the circular grooves are in a conical or semicircular shape and form circular protrusions in the corresponding shape on the inner wall surface of the cavity of the round tube-shaped case; the width of the circular grooves is 1 / 2-1 / 5 as much as the outer diameter of the case, the length of the generatrix of the conical cross sections or the diameter of the semicircular cross sections of the circular grooves is 1-7 times larger than the thickness of the wall of the case, the apex angle of the conical cross sections is 40-120 degrees, and the distance between the central axises of every two neighboring circular grooves is 1.5-40 times as large as the width of the circular grooves. The circular discontinuous energy concentrating jet flow cracker impacts a target at a high speed through the high-temperature, high-pressure and energy-concentrated discontinuous jet flows which are generated by the case, is simple in structure, convenient to machine and use, small in amounts of explosives used in a single blasting, low in vibration, low in production cost and capable of ensuring the safety and meeting various usage requirements.

Description

Technical field: [0001] The invention belongs to the technical fields of engineering blasting and ammunition engineering. Background technique: [0002] Shaped energy cutter is a new type of technology that utilizes the energy-gathering effect of explosives to cut the target. According to the form of damage to the target, the energy-shaped jet can be divided into energy-focused point jet, line jet and circular jet. The existing concentrated point jets and line jets have been serialized and diversified, and there are many types of products. In terms of circumferential jet flow, CN95242267.0 provides a kind of cutting device suitable for downhole, which includes cutting shell and energy-gathering groove in which explosives are provided with drug-type cover, and the cutting shell is equipped with explosives capable of detonating. Detachable detonator. After the explosion, the energy gathers and acts on the liner, producing a metal fluid with extremely high energy density an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04E21B43/263
Inventor 马宏昊陈伟沈兆武林谋金
Owner UNIV OF SCI & TECH OF CHINA
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