Perforator provided with built-in detonating cord extrusion-type bullet fixing component

Abstract

The invention relates to a perforator provided with a built-in detonating cord extrusion-type bullet fixing component. Under the combined action of a bullet fixing sleeve and bullet fixing holes in a bullet frame pipe, reliable fixation of a conventional perforating bullet in a manner of down-extrusion and up-compression is realized, the fixation mode of the perforating bullet in the bullet frame pipe of a conventional perforator is changed, the problem that height of burst inside a gun cannot be fully utilized during fixing the perforating bullet is solved, explosion unreliability caused by the fact that a detonating cord is worn by abrasion of the detonating cord and the inner wall of a gun body is avoided by the built-in mounting mode of the detonating cord, abrasion of the detonating cord and the inner wall of the perforating gun is avoided, and firmness in fixing the perforating bullet is increased. By the structure, the height of burst inside the gun of the perforating bullet can be effectively increased, and stability performance of the detonating cord and the perforating bullet is improved. The perforator is compact in structure, simple and convenient to operate and good in field application effect.

Description

technical field [0001] The invention relates to the field of oil and natural gas exploitation operations, and mainly relates to blasting equipment in the perforation operation of oil and gas wells in the oil industry, in particular to a perforator adopting a built-in detonating cord extrusion type solid bullet assembly. Background technique [0002] In the process of exploration and development of oil and gas fields, perforation is an important operation link, and perforator is a kind of equipment widely used in perforation operation. An important part of the perforator is the bullet holder tube. The bullet holder tube is the part that fixes the perforating charge. The characteristics of the bullet holder tube determine the parameters that have a great influence on the perforation effect, such as the perforation phase and the internal explosion height of the perforating charge. Generally speaking, perforating bullets work under the condition of small explosion height and ar...

AI Technical Summary

Problems solved by technology

This method of fixing bullets tends to make the perforating bullets not centered, easy to eccentric, and the fixation is not firm, so it is difficult to reach the maximum explosion height of the perforating bullet loading gun.

In addition, due to the assembly method in which the detonating cord is wound on the magazine tube, when the magazine tube is vibrated, friction between the detonating cord and the inner wall of the gun body is likely to occur, and even the detonating cord will be worn out, resulting in unreliable detonation transmission.

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