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Petroleum oil perforation gun

A technology of perforating guns and petroleum, which is applied in the direction of exploitation fluid, wellbore/well components, earthwork drilling and production, etc., and can solve problems such as unreasonable structural design of petroleum perforating guns

Inactive Publication Date: 2007-08-29
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of unreasonable structure design of the above-mentioned petroleum perforating gun, and provide a kind of petroleum perforating gun with reasonable structure design

Method used

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  • Petroleum oil perforation gun

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Embodiment Construction

[0010] Referring to Fig. 1, the oil perforating gun of the present invention is composed of a gun head 1, a gun tail 2, a gun body 3, a perforating charge 4, a bullet rack 5, and a wire 6, wherein the gun head 1, the gun tail 2 are located at both ends of the gun body 3, the perforating charges 4 are fixed by the bullet holder 5 and placed in the gun body 3, the wires 6 are connected with each perforating charge 4 and lead out from the gun head 1, and the side wall of the gun body 3 A blind hole 7 is opened at the position relative to the launch port of the perforating charge 4, and it is characterized in that the structural size of the petroleum perforating gun conforms to the following formula:

[0011] p s =0.92σ s ln(b / a)

[0012] where p s is the maximum chamber pressure that the petroleum perforating gun can withstand when firing (the actual chamber pressure can be determined by the loading conditions), in Mpa, when the chamber pressure reaches this value, the petrole...

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Abstract

This invention discloses an oil perforating gun, which comprises gun head, gun tail, gun body, gun perforation bullet, bullet rack and wire; wherein the gun head and gun tail are in the two ends of the gun body, and the gun perforation bullet is fixed by the bullet rack in the gun body; the wire is connected with each gun perforation bullet and lead out from the gun head, and in the lateral wall of the gun body corresponding to the launching port it has a blind hole; the structure dimension of the oil perforating gun is computed by the formula: psú¢0.92ªÊsln(b / a), wherein the PS is the maximum gun pressure of the gun when firing, unit (MPa), ªÊs is the yield limit if the material, unit (MPa), a is the inner radius of the gun body, b is the outer radium of the gun body. By said invention, users can estimate the maximum bearing capability or the structure wall thickness of several types of oil perforating gun.

Description

technical field [0001] The invention relates to a petroleum perforating gun. Background technique [0002] After the oil production well is drilled, the interconnected seamless steel pipes are run into the wellbore, which is called casing. Then cement is injected between the well wall and the casing for cementing. When the cementing is completed, the oil and gas layers and the well wall are also sealed off. To produce oil, the perforating gun loaded with perforating bullets must be lowered to the oil-bearing layer along the casing, perforated around, and the casing and cement casing are shot through and injected into the oil layer, so that the crude oil can pass through. The shot channel flows into the casing, which is the perforating operation. The perforation of oil wells is a very important completion operation. The quality of perforation operations directly affects the oil production rate and production costs of oil wells. Accidents in perforation operations often bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/116
Inventor 韩秀清董小刚邹宽城
Owner CHANGCHUN UNIV OF TECH