Intelligent water injection device

An intelligent, water injection hole technology, applied in the fields of production fluids, wellbore/well components, earthwork drilling, etc., can solve the problems of low success rate of casting and fishing operations, and achieve the effect of improving water injection efficiency and reducing costs

Active Publication Date: 2015-03-25
重庆峰丽能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly applied to vertical wells, because the structure of inclined wells makes the success rate of the operation of replacing water nozzles very low, and it cannot be used for horizontal wells; therefore, this method is not suitable for inclined wells and horizontal wells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0022] Such as figure 1 As shown, the intelligent water injection device of the present invention includes a driving part, a sliding chamber, a piston part, a water injection part and a shift adjustment part.

[0023] The driving part includes a return spring 12, a control pipeline 1, an oil hole provided on the sealing cylinder 5, and a hydraulic chamber between the inner wall of the sealing cylinder 5 and the outer wall of the central pipe 3. The piston part is driven downward by pressurizing the hydraulic chamber; the piston part is driven upward by the return spring 12 .

[0024] The sliding cavity is composed of an upper joint 2, a sealing cylinder 5, a pressure cap 6, a connecting head 7, a sleeve 8, a driving sleeve 9 and a lower joint 11. The upper joint 2, the sealing cylinder 5, the pressure cap 6, the connection head 7, the sleeve 8, and the lower joint 11 are sequentially connected through threads, and the joints of the pressure cap 6, the connection head 7, and t...

Embodiment ２

[0038] Such as image 3 As shown, when the intelligent water injection device of the present invention is used in multiple layers, the control pipeline 1 of the second-stage intelligent water injection device is provided by the wellhead, and after being pre-buried in the first stage, it passes downward and connects to the sealing cylinder 5 of the second stage; The control pipeline 1 of the three-stage intelligent water injection device is provided by the wellhead. After the first stage is pre-buried, it passes downwards to the second stage, and after continuing to be pre-buried, it passes downwards and connects to the sealing cylinder 5 of the third stage; according to this principle, sequentially analogy.

[0039] During operation, the control of the water injection flow rate of each layer is not affected by other layers, and accurate and independent control can be realized. The specific operation method is the same as that of the single layer in Embodiment 1.

[0040] The ...

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PUM

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Abstract

The invention discloses an intelligent water injection device. The intelligent water injection device comprises a driving part, a sliding cavity, a piston part, a water injection part and a gearshift adjusting part. The driving part drives the piston part to reciprocate along the sliding cavity, the piston part comprises a central pipe provided with a plurality of water injection holes axially distributed, the water injection part is provided with water via holes, and the gearshift adjusting part shifts gears to change the number of the water injection holes communicated with the water via holes so as to control water injection flow of the water injection device. The water injection flow of the water injection device can be adjusted as the water injectivity index of the stratum without throwing and fishing, water injection efficiency is improved, and water injection cost is reduced. The intelligent water injection device is applicable to monolayer and multilayer water injection and to inclined and horizontal wells.

Description

technical field [0001] The invention relates to an intelligent water injection device, in particular to an intelligent water injection device suitable for stratified water injection in inclined wells and horizontal wells. Background technique [0002] In the downhole environment of oil extraction, it is necessary to press the oil out through water injection. The water injection techniques currently used are: general water injection and layered water injection. [0003] In general water injection, each layer is injected with the same flow rate. Due to geological reasons, the water absorption index of each stratum is different, and the filling time will not be uniform when using this method. Therefore, there are fewer and fewer oil wells using this method, and the direction of layered water injection is gradually developed. [0004] In layered water injection, water is injected into different formations at different flow rates through downhole tools such as water distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20
CPCE21B43/20
Inventor 唐文波任峰德殷福森
Owner 重庆峰丽能源技术有限公司
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