Arrow-shaped check valve

A check valve and arrow-shaped technology, which is applied in the direction of wellbore/well valve devices, wellbore/well components, earthwork drilling and production, etc., can solve unfavorable drilling operations, affect the service life of arrow-shaped check valves, and affect the spring Life and other issues, to achieve the effect of compact structure, long service life and extended service life

Inactive Publication Date: 2018-11-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This affects the life of the spring, which is not conducive to drilling operations and affects the life of the arrow check valve

Method used

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  • Arrow-shaped check valve
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] As shown in the figure, this embodiment provides an arrow-shaped check valve, which includes an upper valve body 1 and a lower valve body 4. Through holes are provided on the upper and lower valve bodies, and a cone-cylindrical surface is provided at the lower end of the upper valve body 1. The upper end of the lower valve body is provided with an inverted cone inner hole matched with the cone cylinder surface, and the two are connected by threads. A fixed seat 3 is arranged in the lower valve body 4, and a valve core 2 is arranged on the fixed seat 3. The lower end of the valve core 2 and the fixed seat are axially slidingly connected through an axial sliding mechanism. The upper end of the upper end is provided with a flow hole structure, and a sealing mechanism is arranged under the flow hole structure. The upper end of the valve core is arranged with the sealing ...

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Abstract

The invention discloses an arrow-shaped check valve comprising an upper valve body and a lower valve body. The upper valve body and the lower valve body are both provided with through holes. A fixingseat is arranged in the lower valve body. A valve element is arranged on the fixing seat. The arrow-shaped check valve is characterized in that the lower end of the valve element and the fixing seat are axially and slidably connected through an axial sliding mechanism, a circulating hole structure is arranged at the upper end of the valve element, a sealing mechanism is arranged on the lower portion of the circulating hole structure, the upper end of the valve element is matched with a sealing hole formed in the upper valve body, the sealing mechanism and the sealing hole are matched in a sealed mode, and a liquid flow channel structure is arranged on the fixing seat. The arrow-shaped check valve has the advantages of compact structure, convenient mounting and demounting, long service lifeand the like, the circulating hole structure is arranged at the upper end of the valve element, the circulating area of well drilling fluid in an inner cavity of the check valve is increased under the premise that the external dimension of the arrow-shaped check valve is not increased, the energy loss is reduced, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a novel arrow-shaped check valve, which is mainly used in the field of blowout prevention tools and equipment in oil and gas exploitation, and belongs to petroleum drilling machinery and equipment. Background technique [0002] The arrow-shaped check valve is one of the commonly used anti-blowout tools in the drilling tool, which is installed on the drill string. Once a well kick or blowout occurs in the drilling operation, under the action of the high-pressure oil and gas layer or the pressure of the reverse circulation drilling fluid, the arrow-shaped valve core moves up quickly to fit and seal with the valve seat, blocking the drilling tool channel in time to prevent continuous well kick and blowout. Blowout. The disadvantages of arrow check valves in the prior art are: [0003] The existing arrow-shaped check valve has many consumable parts and is difficult to install, which also affects the service life of the arrow-shap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/02
CPCE21B34/02E21B2200/05
Inventor 宋春生江友亮刘鹏
Owner WUHAN UNIV OF TECH
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