Novel synergistic shattering perforation series charging device

Abstract

The invention discloses a novel synergistic shattering perforation series charging device and solves the problems that the whole explosive column is detonated simultaneously so an oil well and a perforation gun barrel are damaged due to large generated gas amount and pressure in the conventional synergistic perforation device. The series charging device comprises a perforation gun barrel in which perforating bullets are arranged and outside which a charging explosive column is sleeved; a plurality of explosion proof pads are distributed on the charging explosive column uniformly; the charging explosive column is divided into a plurality of grades by the explosion proof pads; all grades of the charging explosive columns are connected in series through delay shock conducing tubes arranged on the explosion proof pads; one grade of the charging explosive column on the topmost part is used for a special grade of charging and other grades of the charging explosive column are used for common grades of charging; and on the parts of common grades of charging, the charging explosive column opposite to the jet flow direction of the perforating bullets is also provided with an explosion-proof material plate. The charging explosive column of the series charging device is denoted step by step, so more reasonable, effective and progressive synergistic shattering is achieved, and an oil well and the gun barrel are prevented from being damaged. Moreover, the device has a simple structure, is convenient to use, greatly increases the oil pump capacity and gas output and improves mining efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and specifically relates to a novel synergistic shatter perforation serial charge, which is suitable for oil and gas perforation exploitation or re-exploitation, and is especially suitable for poor oil wells and hard medium oil wells in oil and gas layers. Background technique [0002] In the exploitation of oil wells, an oil well is generally drilled above the oil-bearing area, and then the perforating gun barrel with perforating bullets inside is placed in the oil well, the position is calibrated and fixed, and finally the perforating gun barrel is detonated The perforating bullet, after the explosion of the perforating bullet, forms a high-temperature and high-speed metal flow. After the metal flow passes through the perforating gun barrel, it shoots holes in the surrounding formations, so that the oil and gas in the formation can enter the perforating gun barrel through the ho...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that when several perforating charges are detonated, a high-temperature and high-pressure metal flow is formed. When the metal flow passes through the propellant grain, the entire propellant grain will be ignited at the same time. If it is ignited, the amount of gas produced after combustion will be very large, and the gas pressure will also be very high. In the case of a certain downhole space, excessive high-temperature and high-pressure gas may cause damage to the oil well and the gun barrel, affecting the normal production order. On the one hand, the entire grain is ignited at the same time, so that a large amount of high-temperature and high-pressure gas cannot be used reasonably, fully and effectively, which is a waste of energy

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