The bypass valve capable of repeating switch

A technology of bypass valve and switch, which is applied in the direction of wellbore/well valve device, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems of long basket length, complex structure, expensive price, etc., and improve drilling efficiency. High efficiency, high sand cleaning efficiency, and improved stability

Active Publication Date: 2017-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The structure is complex, which leads to a long basket length of the bypass valve, which greatly limits the number of times the bypass valve can be opened/closed repeatedly;
[0006] 2. Taking the oil well circulation sub as an example, this tool is expensive and will greatly increase the cost of drilling operations (especially in shallow and medium wells) when used;
[0007] 3. Due to the large fluctuation of dri

Method used

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  • The bypass valve capable of repeating switch
  • The bypass valve capable of repeating switch
  • The bypass valve capable of repeating switch

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Embodiment Construction

[0040] Such as figure 1 The bypass valve that can be switched repeatedly according to the present invention includes a valve body 100 and a valve core 200 that can slide in the valve body 100. The inner cavity of the valve body 100 forms an axially through main channel through the valve core 200, so The valve body 100 is sequentially provided with a bypass hole 101 and an inner ring groove 102 along its axial direction, and the valve core 200 is provided with a connecting channel, and the bypass hole 101 and the main channel are connected to form a bypass channel through the connecting channel. When the inner ring groove 102 and the main channel are connected through the connecting channel, a straight-through flow channel is formed. The valve body 100 is also equipped with a valve core connected to the valve core 200 and can position the valve core 200 to open the bypass channel. The reset mechanism for the position of the runner and straight-through runner.

[0041] Such as ...

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Abstract

The invention relates to a bypass valve capable of repeating switch, including a valve body and a valve core capable of sliding in the valve body. The valve body is formed through a valve core to form an axial through main flow passage, where the valve body is provided with a bypass passage and an inner ring groove in the axial direction of the valve body. The bypass passage is formed when the bypass passage is communicated with the main flow passage through the connection passage, and the through flow passage is formed when the inner ring groove is communicated with the main flow passage through the connection passage. The valve body is also provided with a reset mechanism which is connected to the valve body and that positions the valve body at the time of opening the bypass flow passage and through the flow passage. The bypass valve can greatly improve the stability of the bypass operation and the straight-through operation, and realize the cycle switching between the multi-pass operation and the straight-through operation. It also has the advantages of fast plugging and high sand removal efficiency, and can greatly improve the drilling efficiency.

Description

technical field [0001] The invention relates to an oil / natural gas drilling tool, in particular to a bypass valve which can be switched repeatedly. Background technique [0002] In drilling engineering, the problems of lost circulation and sand settling in the horizontal section of horizontal wells are usually encountered. Among them, lost circulation refers to the occurrence of mud leakage during the drilling process, which will not only seriously endanger the safety of drilling operations, but also greatly interfere with the normal drilling, and even cause the wellbore to be scrapped, causing major Economic losses. Sand settling in the horizontal section of a horizontal well means that during the drilling of the horizontal section of a horizontal well, due to the limited sand-carrying capacity of the mud and the self-weight of the drilling mud, a cuttings layer will often be formed at the bottom of the horizontal section. The accumulation will eventually cause sticking a...

Claims

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Application Information

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IPC IPC(8): E21B34/06
CPCE21B34/06
Inventor 郭治良胡大梁蒋祖军肖国益欧彪严炎诚王希勇朱化蜀李果房舟江波崔靖宇
Owner CHINA PETROLEUM & CHEM CORP
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