Downhole fluid one-way conduction high-speed stop valve and using method thereof

A technology of one-way conducting and shut-off valves, which is applied in the direction of wellbore/well valve devices, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of uncontrollable flow rate, oil layer impact damage, and excessive oil output. Achieve the effects of easy construction and installation, weakening hydraulic power, and preventing sand production

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production process, in order to adapt to the actual working conditions, it is necessary to inject or extract the fluid under the condition that the low-speed flow of the oil well fluid is safely controlled. When the existing one-way pilot valve is used, when the fluid velocity increases to the designed critical value, Because there is no corresponding flow rate control structure in the check valve, the flow rate is not easy to be controlled. At this time, the oil layer is easily damaged by impact due to the excessive fluid velocity injected by the water injection well, or the oil reservoir is easily damaged by the excessive fluid velocity injected by the water injection well. Excessive oil production leads to well kick, blowout and other abnormalities

Method used

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  • Downhole fluid one-way conduction high-speed stop valve and using method thereof
  • Downhole fluid one-way conduction high-speed stop valve and using method thereof
  • Downhole fluid one-way conduction high-speed stop valve and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Please refer to Figure 1-Figure 11 As shown, a downhole fluid one-way high-speed cut-off valve includes a central pipe 1, an outer pipe 12 nested outside the central pipe, the central axes of the central pipe 1 and the outer pipe 12 coincide, and the central pipe 1 and the outer pipe 12 A storage space is formed between them, and in the storage space, a multi-stage outer guide tube is nested sequentially from top to bottom on the central tube 1, and the width of the outer guide tube on a single side of the radial section of the outer tube is smaller than that of the central tube. 1 and the distance between the outer tube 12, the place where the outer tube fits in the accommodation space is nested sequentially with the center tube from top to bottom, and a multi-stage inner guide tube is arranged, and the inner guide tube is single in the radial section of the outer tube. The width on the side is smaller than the distance between the central tube 1 and the outer tube 12...

Embodiment 2

[0096] Please refer to Figure 12 As shown, the difference from Embodiment 1 is that in this embodiment, the first-stage outer guide tube 3, the second-stage outer guide tube 6 and the third-stage outer guide tube 9 are automatically attached to the outer tube 12 in the accommodation space. The bottom and top are nested in sequence relative to the central tube, and the first-stage inner guide tube 5, the second-stage inner guide tube 8 and the third-stage inner guide tube 10 are arranged on the central tube in the accommodation space from bottom to top. Secondary nesting settings. The outer circle guide tube 4 and the inner circle guide tube 7 are also reversed and installed in the outer tube 12 . The scheme can be used in oil wells or gas wells to control the production rate of oil and gas layers. When the production rate exceeds the critical value, the production value decreases and the wellhead metering decreases. The injection of killing fluid can quickly enter the oil a...

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Abstract

The invention discloses an underground fluid one-way conduction high-speed stop valve which comprises a center pipe and an outer pipe, a containing space is formed between the center pipe and the outer pipe, a multi-stage outer guide cylinder, a multi-stage inner guide cylinder, an outer circular guide cylinder and an inner circular guide cylinder are further arranged in the containing space, and the upper end of the outer pipe is in positioning connection with the center pipe through an upper gland. The lower end of the outer pipe is connected with the central pipe in a positioning mode through a lower pressing cover, gaps are formed among the inner flow guide cylinder, the outer flow guide cylinder, the outer circular flow guide cylinder and the inner circular flow guide cylinder at intervals, and the gaps form a continuous structure channel in the containing space. The flow velocity is controlled through the flow guide and backflow effects of the continuous structure channel, and oil well exploitation safety is guaranteed. The invention further discloses a method for applying the downhole fluid one-way conduction high-speed stop valve, and the fluid is injected into the stratum through the method. The valve body of the device is free of moving parts, high in reliability and easy to construct and install.

Description

technical field [0001] The invention relates to the technical field of downhole tools for oil exploitation, in particular to a one-way high-speed cut-off valve for downhole fluid and a method for using the same. Background technique [0002] At present, in oil production well fluid-controlled layered water injection and oil production process strings, the one-way valve used in the downhole usually uses a ball or spring to achieve one-way conduction. When the other direction is pressurized, the one-way valve will be blocked. channel, and then realize the functions of preventing anti-spitting sand, well control safety, and ensuring the safety of oil well production. [0003] In the production process, in order to adapt to the actual working conditions, it is necessary to inject or extract the fluid under the condition that the low-speed flow of the oil well fluid is safely controlled. When the existing one-way pilot valve is used, when the fluid velocity increases to the desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/08
CPCE21B34/08
Inventor 钱钦王登庆李德忠韦敏刘艳霞任闽燕聂飞朋贺启强田俊
Owner CHINA PETROLEUM & CHEM CORP
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