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A composite perforating gun

A compound perforating and perforating gun technology, which is applied in wellbore/well components, production fluid, earthwork drilling and production, etc. It can solve the problems of low production efficiency, easy leakage, low sealing and pressure bearing performance of perforating guns in blind holes, etc. To solve the problem, to achieve the effect of convenient operation, increase of seepage area, and improvement of perforation effect

Active Publication Date: 2021-06-08
任丘市泰浩石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in the current blind hole perforating guns. For example, the inner blind holes are directly mirrored on the inner wall of the perforating gun. This method requires special equipment and the production efficiency is extremely low.
Another example is to drill a through hole on the gun body wall first and then weld or glue the blocking piece. The internal blind hole perforating gun processed by this method has low sealing and pressure bearing performance and is easy to leak

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as Figure 1-7 As shown, a new composite perforating gun includes a gun head 1, a perforating gun body 5, and a gun tail 8. A number of blind holes 4 are opened on the surface of the perforating gun body 5, and a bullet rack 9 is arranged inside the perforating gun body 5. , the loading hole 6 provided on the surface of the bullet holder 9 corresponds to the blind hole 4, the blind hole 4 is in the shape of an inverted cone, and the inclined surface of the blind hole 4 is fixedly connected with a symmetrical block 14, between the symmetrical blocks 14 A baffle 13 is plugged in, and an O-ring 12 is provided at the contact position between the baffle 13 and the inclined surface of the blind hole 4 . The blind hole on the surface of the perforating gun corresponds to the loading hole. The blind hole has good sealing and pressure relief through the above design. At the same time, there is a baffle plate thinner than the gun body in the blind hole. This area is relative...

Embodiment 2

[0032] Such as Figure 1-7 As shown, in the actual use of a new compound perforating gun, the perforating gun is assembled, and the perforating gun is transported to the area to be detonated through the cable 1, and the detonator is detonated, and the perforating charge 10 will crush the blind The baffle plate 13 in the hole 4 passes through the blind hole 4 to realize perforation. After detonating the perforating charge 10, the detonation is converted into combustion through the detonation joint 21, and the flame generated by the detonation joint 21 ignites the central hole of the fracturing powder 22 The high-temperature ignition powder 20 inside, the high temperature generated by the ignition powder 20 causes the fracturing powder to burn 22, the amount of the powder is not limited, the gas produced by the powder will be directly sprayed into the formation, so that the formation around the wellbore will generate multiple lines that are not affected by the formation minimum ...

Embodiment 3

[0034] Select the perforating gun of the present invention (test group) and the common same type perforating gun (control group) on the market, the outer diameter of the two groups of perforating guns, the bullet length of the perforating bullet, the outer cone angle of the bullet, and the charge amount Parameters such as perforation density and perforation density are the same. The two groups of perforating guns are transported to the location where detonation is required underground. The data of blasting height, penetration depth, and burr height in blind holes, the experimental results are provided by the attached Figure 5 , 6 , as shown in Table 7:

[0035] According to attached Figure 5 , 6 From the data shown in , 7, it can be clearly seen that the experimental results of the perforating gun of the present invention in blasting height, penetration depth, and burr height in blind holes are obviously better than common perforating guns of the same type on the market. ...

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Abstract

The invention provides a novel composite perforating gun, which belongs to the technical field of oilfield well completion, and includes a gun head, a perforating gun body, and a gun tail. A number of blind holes are opened on the surface of the perforating gun body, and a bullet rack is arranged inside the perforating gun body. , the loading hole opened on the surface of the bullet rack corresponds to the blind hole, the blind hole is in the shape of an inverted cone, and symmetrical blocks are fixed on the inclined surface of the blind hole, and baffles are inserted between the symmetrical blocks. An O-ring is provided at the contact position between the plate and the inclined surface of the blind hole. The invention can better fix the perforating bullet in the charging hole, which ensures the stability of the perforating gun. The design of the blind hole can effectively increase the explosion height of the perforating bullet in the gun body, which is beneficial to improve the safety of the perforating bullet. Penetrating deep, the perforating gun has no burr after detonation, the gun hole does not deform, and it can effectively reduce formation pollution.

Description

technical field [0001] The invention belongs to the technical field of oilfield well completion, and in particular relates to a novel composite perforating gun. Background technique [0002] Perforation operation is a crucial link in oilfield exploration and development. Perforation operation is completed by perforating gun. To form a fluid channel that communicates the wellbore and the oil and gas production layer, conventional shaped energy perforating guns are commonly used in oil fields. [0003] The shaped energy perforator is mainly used for perforating oil and gas wells, and the perforating gun is the main part of the shaped energy perforator. At present, due to the increasing volume of perforating bullets, the explosion height in the gun body is getting smaller and smaller, which affects the improvement of the penetration depth of perforating bullets. Therefore, various forms of blind hole perforating guns have appeared in recent years. However, there are many defe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/116E21B43/119
CPCE21B43/116E21B43/119
Inventor 李华赵方琪杜衍青齐颜平张祥梅李瑞张俊郝信辉杜珊周丽冰
Owner 任丘市泰浩石油科技有限公司
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