Sleeve type composite positioning and shooting angle-fixed perforating device

Abstract

The invention relates to a sleeve type composite positioning and shooting angle-fixed perforating device. The sleeve type composite positioning and shooting angle-fixed perforating device comprises a perforating gun body, a shooting angle-fixed bullet rack, a first middle joint and a second middle joint, wherein the two ends of the perforating gun body are connected with the first middle joint and the second middle joint respectively, the shooting angle-fixed bullet rack is installed in the perforating gun body, perforating bullets are installed on the shooting angle-fixed bullet rack, and the perforating bullets communicate through detonating cords; the perforating gun body is sleeved with a sleeve type bullet barrel, and the two ends of the sleeve type bullet barrel are fixed through the first middle joint and the second middle joint. According to the sleeve type composite positioning and shooting angle-fixed perforating device, the perforating gun body is sleeved with the sleeve type bullet barrel, the explosive loading amount can be increased by nearly 10 times compared with that of conventional composite perforating explosive cake type gunpowder, the limitation of the space of the perforating gun body is eliminated, and the positioning and shooting angle-fixed perforating technology and the fracturing technology can be implemented at the same time.

Description

technical field [0001] The invention belongs to the field of oilfield machinery, and relates to a sleeve-type composite perforating device with fixed orientation and fixed shooting angle. Background technique [0002] In recent years, with the in-depth development of oilfield development, the difficulty of mining has been increasing, and the requirements for perforation technology have become higher and higher. In order to pursue better development effects and greater economic benefits, composite perforation technology has been widely used at home and abroad. The composite perforation technology is an efficient perforation technology that integrates perforation and high-energy gas fracturing. Gas fracturing can improve the conductivity of the formation near the wellbore and improve the effect of perforation completion. [0003] At present, the commonly used composite perforation in China is to put the solid propellant and the perforating charge into the charge frame togeth...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a sleeve-type compound perforating device with fixed orientation and fixed shooting angle, which overcomes the problem that the current fixed perforating device is limited by the space of the bullet rack and the perforating gun body, and it is difficult to realize composite perforation

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