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Lined-cavity charge with consistent punching aperture rule and hole depth

A perforating bullet and regular technology, applied in the field of perforating bullets, can solve problems such as poor hole depth consistency and irregular perforation aperture, and achieve the effect of increasing utilization rate, increasing initial energy and speed, and improving perforation index

Inactive Publication Date: 2011-08-17
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of irregular perforation aperture and poor consistency of hole depth in the existing technology

Method used

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  • Lined-cavity charge with consistent punching aperture rule and hole depth
  • Lined-cavity charge with consistent punching aperture rule and hole depth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Next, a shaped charge with regular perforation diameter and consistent hole depth according to the present invention will be described in detail below with reference to the accompanying drawings.

[0016] As shown in the figure, an energy-shaping perforating charge with regular perforation diameter and consistent hole depth mainly includes a projectile body 1; The volume and the effective utilization rate of explosives; the lower part adopts the stepped diameter reduction method 3, which increases sequentially from the top to the bottom. After two linear diameter reductions, it becomes a fixed inner diameter at the bottom, eliminating the impact of harmful shock waves on the jet. A reflective groove structure 4 is opened on the inner wall of the body cavity. The reflective grooves are set on the arc top of the body cavity, the circular arc surface of the stepped diameter reduction in the middle, and the 1 / 4-1 / 3 below the mouth. Set several circles and have a concave ar...

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PUM

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Abstract

The invention discloses a lined-cavity charge with a consistent punching aperture rule and a consistent hole depth. The lined-cavity charge mainly comprises a charge body; and a reflection groove is formed on the inner wall of an inner cavity of the charge body. An inner cavity of a lined-cavity charge shell has a structure of combination of a reflection groove and arc top type and stepped reducing; the reflection groove is formed on the stepped reducing part; and the utilization rate of main explosive load is increased, so that detonation waves act in the axial direction through a reflection interface during transferring and are enhanced, the initial energy and speed of the detonation waves are improved, and punching indexes of the lined-cavity charge are improved. The influence of harmful detonation waves is effectively reduced, the detonation power and jet speed are improved, the effect of the consistent punching aperture rule and the consistent hole depth are guaranteed, and better punching indexes are reached. The lined-cavity charge has a simple structure and a reasonable design and is easy to implement.

Description

technical field [0001] The invention relates to a perforating charge, in particular to a shaped energy perforating charge with regular perforation diameter and consistent hole depth. Background technique [0002] At present, after casing is run in oil fields, energy-concentrated perforators are used to penetrate the casing, cement sheath, and pollution zone of the downhole closed oil and gas production layer, and go deep into the oil and gas layer to complete the well, so as to achieve the purpose of oil production, gas production and water injection. The main function of the perforator perforation is the shaped charge, and its jet penetration index has the most direct and important contribution to the communication of oil and gas production layers. Oil well productivity has far-reaching implications. During the laboratory target shooting test with shaped energy perforating bullets, problems such as irregular perforation aperture and poor consistency of hole depth were foun...

Claims

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Application Information

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IPC IPC(8): E21B43/117
Inventor 运华云李雪张林张脉全刘云刚张峰王峰徐文新赵云涛
Owner CHINA PETROCHEMICAL CORP