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Underground jam releasing structure and underground jam releasing method

A sealing body and channel technology, used in wellbore/well components, wellbore/well valve devices, earth-moving drilling, etc., can solve problems such as nozzle jamming, affecting the normal production of oil and water wells, etc., and improve reliability. , restore production capacity, the effect of broad application prospects

Active Publication Date: 2021-07-13
CHINA OILFIELD SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the long-term working process of the downhole flow control valve, the faucet is likely to be blocked due to fouling and blockage of bottom-hole pollutants, and the fluid channel will be closed. The formation fluid will not be able to enter the wellbore of the production well, affecting the normal production of oil and water wells.

Method used

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  • Underground jam releasing structure and underground jam releasing method
  • Underground jam releasing structure and underground jam releasing method
  • Underground jam releasing structure and underground jam releasing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The embodiment of the present application provides an underground jamming structure, such as Figure 1 to Figure 4 As shown, the downhole jam release structure includes a pipe string base 1, a regulating valve assembly and a separation device; the pipe string base 1 is provided with a first passage 12 and a second passage 14, and the pipe string base 1 is also provided with a first opening 11 and the second opening 13, the fluid enters the second passage 14 through the first opening 11, the first passage 12, and the second opening 13 in turn; the regulating valve assembly includes a regulating valve 21, and the regulating valve 21 includes a valve body 211 and is arranged on the valve The lower sealing body 213 at the bottom of the body 211, the lower sealing body 213 is set to extend into the first passage 12 and can move in the first passage 12 to close or open the first passage 12; between the valve body 211 and the lower sealing body 213 A separation device is provi...

Embodiment 2

[0053] The downhole jam-releasing structure provided in the embodiment of the present application is the same as the main structure 63 in the first embodiment, and only the differences between the two are described here. The main difference between the downhole jam release structure provided in the embodiment of the present application and the first embodiment lies in the structure of the regulating valve 21 .

[0054] In an exemplary embodiment, a third sealing body is provided on the valve body 211, and the third sealing body is arranged between the upper sealing body 212 and the lower sealing body 213; after the lower sealing body 213 falls off from the valve body 211, The third sealing body is used to close or open the first channel 12 .

[0055] A third sealing body is provided to replace the lower sealing body 213 after the lower sealing body 213 is blasted off. When the fluid channel needs to be closed, the third sealing body is located between the first opening 11 and ...

Embodiment 3

[0059] The embodiment of the present application provides a kind of downhole solution method, the downhole solution method uses the downhole jamming solution structure in embodiment 1 or embodiment 2, comprises the following steps:

[0060] Measure the current value of the circuit where the drive motor 24 is located: the voltage can be sampled through a 1Ω resistor connected between the drive circuit and the motor, and the voltage on the resistor is measured by the voltage measurement module, and the voltage value is equal to the current value, such as Figure 5 shown.

[0061] When the current value reaches the first set value, drive the motor 24 to control the regulating valve 21 to go up and down to confirm whether the regulating valve 21 is in a stuck state: judge whether the regulating valve 21 is in a locked state by the current value, when the current value is greater than When the current is twice the normal working current, it means that the regulating valve 21 has be...

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Abstract

The invention discloses an underground jam releasing structure and an underground jam releasing method. The underground jam releasing structure comprises a tubular column base body, an adjusting valve assembly and a separating device; a first channel and a second channel are arranged in the tubular column base body; a first opening and a second opening are further formed in the tubular column base body; fluid enters the second channel through the first opening, the first channel and the second opening in sequence; the adjusting valve assembly comprises an adjusting valve; the adjusting valve comprises a valve body and a lower sealing body arranged on the lower portion of the valve body; the lower sealing body is arranged to stretch into the first channel and can move in the first channel so as to close or open the first channel; the separating device is arranged between the valve body and the lower sealing body; and the separating device acts to enable the lower sealing body to fall off from the valve body. According to the underground jam releasing structure provided by the embodiment of the invention, the fluid channel can be reopened under the condition that the adjusting valve is jammed.

Description

technical field [0001] The present application relates to but not limited to the downhole jam release technology, in particular, an downhole jam release structure and a downhole jam release method. Background technique [0002] In recent years, although the application scale of intelligent injection-production technology in Bohai Oilfield has continued to expand, the application failure rate of the overall process is high. Among them, the stuck water distribution / production tool regulating valve is a very important cause of failure. Block the fluid channel between the formation and the wellbore, affecting the normal production of oil and water wells. [0003] The downhole flow regulating valve is a key tool to realize the layered production of oil and water wells, which can realize the fine control of the layered flow rate and help to improve the oilfield development effect. During the long-term working process of the downhole flow control valve, the faucet is likely to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/06E21B31/107E21B43/20E21B47/00
CPCE21B34/066E21B31/107E21B43/20E21B47/00Y02E10/10
Inventor 李翔杨树坤赵广渊郭宏峰季公明杜晓霞孙希康
Owner CHINA OILFIELD SERVICES
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