Catridge shape cover, perforating bullet shell and ultra-deep penetrating perforating bullet

Abstract

The invention relates to a catridge shape cover, a perforating bullet shell and an ultra-deep penetrating perforating bullet. The catridge shape cover has a wall thickness-varying structure composed of an inner conical surface and an outer conical surface; an inner bus and an outer bus are formed by randomly combining multiple sections of line segments; each of the line segments comprises a straight line and a quadric curve; a conical and curve surface multi-sectional combined wall thickness-varying structure is adopted as the structure of the catridge shape cover, so that the sufficient long and thin state of a formed jet flow is ensured and the middle breakage is prevented; the bus of the inner wall of the perforating bullet shell is formed by connecting a plurality of straight lines; the slopes of the adjacent straight lines are different; the bus of the inner wall of another perforating bullet shell is formed by connecting straight and arc curved line segments; the perforating bullet comprises the catridge shape cover and the perforating bullet shell; the perforating bullet has a small-dose loading structure; compared with the large-dose loading structure design, the small-dose loading structure combined with whole structure optimal design has the advantages that the ultra-deep penetrating perforating effect is achieved and the safety of perforating equipment operation is greatly increased.

Description

technical field [0001] The invention relates to the technology of energy-shaping perforating charges, in particular to a novel liner and ultra-deep penetrating perforating charges. Background technique [0002] In the process of oil production, perforation penetration is the biggest factor affecting the production rate of oil wells. It has been proved that increasing the perforation depth of perforating bullets can greatly improve the perforation effect, reduce fracturing pressure, expand the communication area of ​​oil layers, increase Oil and gas well production. [0003] Currently, assembly The average penetration depth of the perforating bullets of the perforating gun on the API19B concrete target is about 600mm. The average penetration depth of the perforating bullets of the perforating gun on the API19B concrete target is about 730mm. The average penetration of the perforating bullets of the perforating gun on the API19B concrete target is about 850mm. In the pr...

AI Technical Summary

Problems solved by technology

In the prior art, in order to increase the penetration depth of the projectile, the method of increasing the diameter of the charge cover (charge) and increasing the charge amount is usually adopted. Some data show that the charge amount of a certain type of perforating charge has reached 80g, but this method The effect is limited, and at the same time, it brings many disadvantages, such as the decrease of gun loading density, the use of larger size perforating guns, and the increased risk of bombing guns, etc.

A large number of experiments have proved that the method of increasing the diameter of the liner (charge) and increasing the amount of charge to increase the perforation penetration cannot meet the comprehensive performance requirements

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