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Expansion composite perforating gun

A technology of compound perforating and perforating charges, applied in the field of expanding compound perforating guns, can solve the problems of perforation pollution, affecting the permeability of the formation around the wellbore, and achieve the effect of improving the permeability and expanding the perforation channel.

Inactive Publication Date: 2015-08-19
DAQING HONGXIANGYU TECH
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  • Abstract
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Problems solved by technology

[0002] Perforation operation is a crucial link in oilfield exploration and development. Perforation operation is completed by perforating gun. To form a fluid channel connecting the wellbore and the oil and gas production layer, conventional shaped energy perforating guns are commonly used in oil fields. Although this type of gun greatly improves the perforating efficiency, the high temperature and high pressure of the shaped energy perforating bullet will squeeze around the tunnel. The formation of compaction zones caused by perforation contamination seriously affected the permeability of formations around the wellbore

Method used

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  • Expansion composite perforating gun

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[0008] specific implementation plan

[0009] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0010] As shown in the figure, the expansion compound perforating gun consists of an upper positioning plate 1, a positioning pin 2, a return spring 3, a bullet holder 4, an inner and outer blind hole gun body 5, a capacity expansion and synergistic medicine box 6, a perforating bullet 7, and a lower positioning plate 8; the upper positioning plate 1 and the lower positioning plate 8 are respectively connected with the bomb holder 4 through screws, and the expansion and efficiency booster cartridge 6 is placed on the front end of the perforating charge 7 and fixed on the corresponding hole position of the bomb holder 4. 4 As the carrier of the perforating bullet 7, it not only determines the phase and hole density of the perforator, but also determines the shockproof reliability and performance stability of the perforator...

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Abstract

The invention provides an expansion composite perforating gun, and belongs to the technical field of oilfield exploration and development. The expansion composite perforating gun eliminates serious formation contamination, improves the perfection degree of perforation and increases oil gas well capacity. According to the technical scheme, the expansion composite perforating gun is composed of a gun carrier, an inner and outer blind hole gun body, an expansion and efficacy-improving gunpowder box and a perforating bullet. The expansion and efficacy-improving gunpowder box is mounted at the front end of the perforating bullet, after a perforator detonates a penetrating hole, gunpowder is combusted, high-energy particle carrier waves and high-energy impact waves generated by the gunpowder are expanded and are used for acting on a perforated tunnel within microsecond time, the perforated tunnel is extended and expanded, and therefore the purpose of perforated tunnel expansion is achieved. The perforating depth and the pressed crack length can be beyond the range of a pollution zone, so that the penetrating quality of the immediate vicinity of a wellbore is improved, and the flow conductivity of a stratum is improved.

Description

technical field [0001] The invention belongs to the technical field of oilfield exploration and development, and in particular relates to a special device for perforation, volume expansion and efficiency enhancement in the perforation completion process-a volume expansion composite perforating gun. Background technique [0002] Perforation operation is a crucial link in oilfield exploration and development. Perforation operation is completed by perforating gun. To form a fluid channel connecting the wellbore and the oil and gas production layer, conventional shaped energy perforating guns are commonly used in oil fields. Although this type of gun greatly improves the perforating efficiency, the high temperature and high pressure of the shaped energy perforating bullet will squeeze around the tunnel. The formation of compaction zones caused by perforation contamination seriously affected the permeability of formations around the wellbore. How to decontaminate the formation d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/116
CPCE21B43/116
Inventor 禹栽星黄国全韩宏波张淑荣
Owner DAQING HONGXIANGYU TECH
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