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High performance double charge perforating charge

A perforating bullet and high-performance technology, which can be used in wellbore/well components, production fluid, earthwork drilling and mining, etc., and can solve problems such as defects in explosive energy utilization

Active Publication Date: 2020-08-11
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-performance double-charged perforating bullet to overcome the defects of the energy utilization rate of explosives in the existing perforating bullet charging technology

Method used

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  • High performance double charge perforating charge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, the explosive is composed of auxiliary explosive HMX and main explosive HNS. The auxiliary explosive HMX has a mass of 4g and a layer thickness of 2mm. The auxiliary explosive is distributed in the hemispherical cavity of the shell; It is 34g. The maximum head velocity of the double-charge perforating bullet jet is: 6411m / s, which is 8.3% higher than the original design; the maximum kinetic energy of the double-charge perforating bullet cover is 2.6×10 10 µj; 11.4% higher than the original design.

Embodiment 2

[0045] Such as figure 2 As shown, the explosive is composed of auxiliary explosive HMX and main explosive HNS. The auxiliary explosive HMX has a mass of 6g and a layer thickness of 2mm. HNS mass is 32g. The maximum head velocity of the double-charge perforating bullet jet is: 7092m / s, which is 19.9% ​​higher than the original design; the maximum kinetic energy of the double-charge perforating bullet cover is 3.22×10 10 µj; 37.8% higher than the original design.

Embodiment 3

[0047] Such as image 3 As shown, the explosive is composed of auxiliary explosive HMX and main explosive HNS. The auxiliary explosive HMX has a mass of 8g and a layer thickness of 2mm. HNS mass is 30g. The maximum head velocity of the double-charge perforating bullet jet is: 7143m / s, which is 20.8% higher than the original design; the maximum kinetic energy of the double-charge perforating bullet cover is 3.65×10 10 µj; 56.5% higher than the original design.

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Abstract

The invention relates to the technical field of petroleum exploration and development, in particular to a high-performance double-layer explosive charging perforating bullet. The high-performance double layer explosive charging perforating bullet includes a shell body, auxiliary explosive, main explosive and a shaped charge cover. The shell body is composed of an upper circular table section and alower cylindrical section. An inner cavity of the shell body is formed by four sections of a cylindrical explosion transmission hole, a hemisphere cavity, a circular table cavity and a cylindrical cavity which are connected with one another in sequence. A cavity between the shell body and the shaped charge cover. forms the outer shape of the auxiliary explosive and the inner shape of the main explosive. Through a small quantity of high explosive velocity auxiliary explosive, the sequence of propagation of explosion in sequence from the end of initiation of explosion of original main explosiveis changed; the whole main explosive is excited almost simultaneously; the pressing cross angle of effects of the main explosive to the shaped charge cover. is greatly improved; energy of the original main explosive in low explosive velocity is activated; the maximum head speed of the high-performance double-layer explosive charging perforating bullet is 6-30% higher than the maximum head speed of an original design; the largest kinetic energy of the shaped charge cover is increased by 10-60%; and the use ratio of the explosive is improved and the perforating capacity of the perforating bullet is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a high-performance double-charge perforating bullet. Background technique [0002] In the perforation operation to improve the productivity of oil and gas wells, the performance of the perforator is very important and even plays a decisive role. The penetration index of the perforator is one of the most important perforation parameters that affect the productivity of oil and gas wells. Increasing the perforation depth can establish better oil and gas production channels in the perforated interval to achieve the purpose of increasing the productivity of oil and gas wells. [0003] The perforating charge consists of three parts: explosive, liner and casing. Among them, the explosives are the work done by the perforating bullets and the energy source of the detonation perforation. At present, the main explosives of the conventional perforating bullets ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/119E21B43/116
Inventor 贺建磊徐志国石前吕畅朱爱秋
Owner BC P INC CHINA NAT PETROLEUM CORP
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