A perforating device for well completion

A technology of passing through holes and hoses, which is applied in wellbore/well components, production fluid, earthwork drilling and mining, etc. It can solve the problems of limited jet rock breaking effect and insufficient communication range of channels, etc., and achieves small space occupation and simple structure Effect of compactness and lengthening hole depth

Active Publication Date: 2021-06-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the communication range of the tunnel is still far from enough, and the effect of jet rock breaking is limited

Method used

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  • A perforating device for well completion
  • A perforating device for well completion
  • A perforating device for well completion

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0033] Such as Figure 1 to Figure 8 In the embodiment showing the perforating device for well completion operation, the perforating device for well completion operation is mainly used in the field of well completion and production stimulation of petroleum carbonate reservoirs. The perforating device for well completion includes a casing 1 and a nozzle assembly 2. One end of the nozzle assembly 2 is set in the casing 1;

[0034] In this embodiment, the nozzle assembly 2 includes a spray hose 21 and a combined spray head 22 . Wherein, there are a plurality of spray hoses 21, and the multiple spray hoses 21 are sheathed in turn, and the spray hoses 21 are stretched out step by step under the action of hydraulic traction to drill into the reservoir to implement po...

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Abstract

The invention provides a perforating device for well completion, which includes a casing and a nozzle assembly, one end of the nozzle assembly is arranged in the casing, and the other end protrudes from the casing, and the nozzle assembly includes a plurality of The sheathed spray hose, and the combined spray head arranged at the spray end of the spray hose, the combined spray head includes a plurality of split blocks connected to the spray hose in one-to-one correspondence, and the adjacent spray hose passes through the split The shear nails between the blocks are limited; between the adjacent spray hoses, there is a limit assembly that cooperates with the outer tube when the inner tube stretches out to the end of the outer tube. The invention has the advantages of increasing the oil drainage area of ​​the reservoir, simple structure, convenient operation and the like.

Description

technical field [0001] The invention relates to the field of downhole well completion tools, in particular to a perforating device for well completion operations. Background technique [0002] Opening up oil flow channels is an important process in oil extraction. The existing way to open up the oil flow channel is to use shaped projectile perforation. The compaction zone pollution caused by this perforation method cannot be overcome, and the effective permeability of the reservoir is greatly reduced, which is extremely unfavorable to crude oil production. In order to solve the above-mentioned technical problems, the existing method is to use high-pressure water jet perforation, which can produce a certain length of tunnel. However, the communication range of the channel is still far from enough, and the effect of jet rock breaking is limited. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/114E21B43/119
CPCE21B43/114E21B43/119
Inventor 戴文潮赵晨熙程光明邹传元朱和明
Owner CHINA PETROLEUM & CHEM CORP
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