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Shale reservoir high-pressure self-orientation clustering perforator

A shale reservoir, self-orientation technology, applied in wellbore/well components, production fluid, earthwork drilling and production, etc., can solve problems such as high temperature and difficulty, achieve flexible gun body length, improve overall strength, and set gun The effect of length

Inactive Publication Date: 2022-07-15
大庆华翰邦石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, under the condition of limited underground space, the temperature is high, and the explosion pressure exceeds 140MPa. It is usually difficult to ensure electrical insulation, reliable electrical connection, and isolation of blasting high voltage while realizing ignition control at all levels.

Method used

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  • Shale reservoir high-pressure self-orientation clustering perforator
  • Shale reservoir high-pressure self-orientation clustering perforator
  • Shale reservoir high-pressure self-orientation clustering perforator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] refer to Figure 1-6 As shown in the figure, the present invention discloses a high-pressure self-oriented cluster perforator for shale reservoirs, comprising: a perforating gun 1 and an intermediate joint 2; the intermediate joint 2 is detachably connected between two adjacent perforating guns 1 ; The intermediate joint 2 includes an intermediate joint body 21, a two-way high-pressure sealing plug 22, two first springs 23, two first electrical contacts 24 and two second electrical contacts 25; the two-way high-pressure sealing plug 22 is provided in the intermediate joint The middle part of the inner cavity of the main body 21 is arranged coaxially with the intermediate joint body 21; the two first electrical contacts 24 are arranged on both ends of the inner cavity of the intermediate joint body 21; the two second electrical contacts 25 are arranged on the bidirectional high voltage Both ends of the sealing plug 22 ; a first spring 23 is provided between the first ele...

Embodiment 2

[0062] refer to Figure 1-6 As shown in the figure, the present invention discloses a high-pressure self-oriented cluster perforator for shale reservoirs, comprising: a perforating gun 1 and an intermediate joint 2; the intermediate joint 2 is detachably connected between two adjacent perforating guns 1 ; The intermediate joint 2 includes an intermediate joint body 21, a two-way high-pressure sealing plug 22, two first springs 23, two first electrical contacts 24 and two second electrical contacts 25; the two-way high-pressure sealing plug 22 is provided in the intermediate joint The middle part of the inner cavity of the main body 21 is arranged coaxially with the intermediate joint body 21; the two first electrical contacts 24 are arranged on both ends of the inner cavity of the intermediate joint body 21; the two second electrical contacts 25 are arranged on the bidirectional high voltage Both ends of the sealing plug 22 ; a first spring 23 is provided between the first ele...

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PUM

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Abstract

The shale reservoir high-pressure self-orientation clustering perforator comprises perforating guns and middle connectors, the middle connectors are detachably connected between the adjacent perforating guns, and each middle connector comprises a middle connector body, a bidirectional high-pressure sealing plug, two first springs, two first electric contacts and two second electric contacts. The perforating gun comprises a gun body, a bullet carrier, a bullet carrier eccentric counterweight, a plurality of perforating bullets, a detonating cord, a detonator, an ignition selective firing module and two electric contact pins. The bidirectional high-pressure sealing plug is arranged in the middle connector body, bidirectional high-pressure sealing of the middle connector is achieved, meanwhile, the first electric contacts arranged at the two ends of the middle connector body are electrically communicated with the second electric contacts arranged at the two ends of the bidirectional high-pressure sealing plug through the first springs, and reliable electric connection between adjacent perforating guns is achieved; and high pressure generated by explosion of the perforating guns can be effectively isolated through the combined action of the two-way high-pressure sealing plug and the first spring, and the adjacent perforating guns are prevented from being affected.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a high-pressure self-directional cluster perforator for shale reservoirs. Background technique [0002] After drilling and cementing in oil and gas fields, perforation technology is required to open the casing and cement sheath of the closed oil and gas layers downhole to penetrate into the oil and gas layers, establish a communication channel between the wellbore and the oil and gas layers, and allow the fluid to flow into the wellbore casing. In thin oil layers and fractured oil reservoirs, highly deviated wells, cluster wells, horizontal wells and other special structural wells are mostly used, especially for shale oil, coalbed methane, ultra-low permeability tight oil and gas, etc., which require precise directional perforation and hydraulic pressure. Crack to gain productivity. At present, since most of the shale oil reservoirs are horizontal, the rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/116E21B43/119
CPCE21B43/116E21B43/119
Inventor 马新民葛显宝席岩陈建华毛俊杰谌辰谭忠超孙博王新生于龙史鑫伟关凌峰朱璘许鹏张成宗立民赵龙高峰
Owner 大庆华翰邦石油科技有限公司