Perforating bullet improving tunnel flow conductivity

A technology of diversion capacity and perforating bullets, which is applied in the direction of warheads, ammunition, projectiles, etc., can solve problems such as clogging of pestle body, increase of small debris between particles, and decrease of average permeability, so as to reduce clogging, increase production capacity, The effect of increasing the channel conductivity

Pending Publication Date: 2017-05-31
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology

However, the inventors found that the inner wall of the perforation tunnel formed by the existing energy-concentrating perforation process is easily formed after being eroded by high-temperature (2000∼5000°C) and high-pressure (thousands to tens of thousands of MPa) metal jets. The inner particles are broken, the number of large particles decreases, and the small debris between particles increases greatly. The large pores with good connectivity will be replaced by a large number of small pores. Many pore throats are bl

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  • Perforating bullet improving tunnel flow conductivity

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Embodiment Construction

[0015] The invention provides a perforating charge that improves the flow conductivity of the tunnel. The perforating charge can remove the perforation compaction zone and reduce the clogging of the perforating pestle in the process of forming the perforation tunnel, so as to realize clean perforation and increase Pore ​​conductivity, the effect of improving the productivity of oil and gas wells.

[0016] Embodiments of the present invention will be described in detail below in conjunction with the following drawings.

[0017] Specifically, such as figure 1 As shown, a perforating charge that improves the flow conductivity of the channel includes an internal projectile body 1, and the projectile body 1 is provided with an energetic material liner 2 and an energy-gathering perforating liner 3. The energetic material liner 2 and the Explosives 4 are also filled between the inner cavities of the missile body 1 .

[0018] Wherein, the top section of the inner cavity of the proje...

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Abstract

The invention relates to the technical field of support equipment of mine construction and particularly relates to a perforating bullet improving the tunnel flow conductivity. In a perforation tunnel forming process, the perforating bullet can remove the perforation compaction zone and reduce the blocking of a perforation slug; and with the effects of cleaning the perforation, improving the tunnel flow conductivity and increasing the oil/gas well capacity, the perforating bullet improving the tunnel flow conductivity comprises a bullet body, an energetic material liner integrated by tight compaction in the bullet body and a shaped charge perforation liner, wherein explosive fills the space between the energetic material liner and the bullet body inner cavity; the top end of the bullet body inner cavity is of an arc-shaped section, and the inner wall of the bullet body inner cavity except the arch-shaped top end is of a reducing step shape; the energetic material liner and the shaped charge perforation liner are of a single-taper angle variable-wall thickness structure; and the outer taper angle of the top end of the shaped charge perforation liner is the same as the inner taper angle of the top end of the energetic material liner.

Description

technical field [0001] The invention relates to the technical field of supporting equipment for mine construction, in particular to a perforating charge for improving the flow guiding capacity of a tunnel. Background technique [0002] As the most commonly used completion technology for oil and gas well exploration and development in this field at home and abroad, the energy-concentrating perforation technology crushes the liner through the energy-gathering effect (also called the Monroe effect) produced by the detonation of explosives, thereby converging on its axis to form a well. The high-temperature, high-pressure, and high-speed energy-gathering metal jet penetrates the perforating gun, casing, cement sheath and penetrates into the oil and gas production layer to form a circulation channel (ie, perforation tunnel) that communicates the wellbore and the oil and gas production layer. However, the inventors found that the inner wall of the perforation tunnel formed by the ...

Claims

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Application Information

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IPC IPC(8): E21B43/116F42B12/10
CPCE21B43/11F42B12/10
Inventor 张脉全刘云刚朱建新张志强庄金勇刘增周波赵金文张学瑞马文华刘云兰
Owner CHINA PETROCHEMICAL CORP
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