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Ball shape flow limit valve and its use in liquid transport pipeline

A technology for conveying pipelines and restricting valves, which is applied to spherical restricting valves and its application in liquid conveying pipelines, can solve the problems of difficult inspection and replacement of components, small flow range, wellhead back pressure, etc., so as to achieve cost saving, Wide current limiting range and good sealing performance

Inactive Publication Date: 2008-04-23
大庆工大技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adjusted flow range of this device is relatively small, and it is not easy to check and replace components after each flow passage is blocked, and it is easy to cause back pressure at the wellhead during the process of disassembling the components, resulting in backflow phenomenon

Method used

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  • Ball shape flow limit valve and its use in liquid transport pipeline
  • Ball shape flow limit valve and its use in liquid transport pipeline
  • Ball shape flow limit valve and its use in liquid transport pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] see figure 1 and figure 2 , the spherical restrictor valve of this embodiment includes a valve body 1, a spherical valve core 2 and a valve stem 5, a through valve cavity is formed in the valve body 1, and the spherical valve core 2 is installed in the valve cavity of the valve body 1 , and the valve cavity is divided into liquid inlet hole 3 and liquid outlet hole 4. The valve stem 5 is rotatably mounted on the valve body 1, and a handle 6 is installed on the valve stem 5. Turning the handle 6 can drive the spherical valve core 2 to rotate between the open position and the cut-off position. A protruding boss is formed radially inward on the inner wall of the inner hole of the spherical valve core 2 near the end of the liquid outlet hole 4, forming a shoulder shape. A flow-limiting element 7 is fixed in the inner hole with a larger inner diameter of the spherical valve core 2, and the flow-limiting element 7 is a hollow cylinder. The formed boss is fixed, and the ot...

Embodiment 2

[0028] see Figure 4 , the rest of this embodiment is the same as Embodiment 1, except that the flow limiting element 7 used is a hollow cylinder with a shoulder corresponding to the boss structure on the inner hole of the spherical valve core 2, the limiting One end of the flow element 7 close to the liquid inlet hole 3 is also fixed with one to two fixed snap rings 9, and can also be fixed with other fixed structures such as sealing rings, and the other end is fixed by the boss on the spherical valve core 2.

Embodiment 3

[0030] see Figure 5 , the rest of this embodiment is the same as Embodiment 1, the difference is that there is no forming boss in the inner hole of the spherical valve core 2, which is a cylindrical hole with the same diameter of the inner hole; the flow limiting element 7 used is still a hollow cylinder body, at this moment both ends of the flow limiting element 7 are fixed with the fixed snap ring 9 that is stuck on the inner wall of the inner hole of the spherical valve core 2, and can also be fixed with other fixed structures such as sealing rings or back caps. When checking or replacing the current limiting element 7, it is only necessary to take out the fixing structures such as the fixing snap ring 9 at one end of the liquid inlet hole 3, instead of taking out the fixing structures such as the fixing snap ring 9 at the other end.

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Abstract

The present invention discloses a kind of ball-shaped flow limit valve and its use in liquid transport pipeline. The ball-shaped flow limit valve includes one valve body with inside valve cavity communicated to the liquid inlet and liquid outlet formed in the valve body; one spherical valve core inside the valve cavity and with inner hole for communicating the liquid inlet and the liquid outlet; one valve rod mounted on the valve body to control the valve core rotation between one cut-off position and one communication position; and one flow limiting element inside the valve core hole. The ball-shaped flow limit valve has the flow limiting element with different aperture and thus different flow limiting range, and the flow limiting element may be checked or replaced easily in high efficiency and low cost.

Description

technical field [0001] The invention relates to a spherical flow limiting valve and its application in liquid delivery pipelines, in particular to a spherical flow limiting valve for controlling the water mixing volume of a single well or single ring and its application in the oil well water mixing pipeline. Background technique [0002] At present, in the production process of the oil field, in order to ensure the production of the oil well, improve the oil production efficiency and reduce the production cost, it is necessary to add water to the oil well. For the multi-branch parallel water mixing process, there is a problem that the water mixing amount of each oil well is unequal due to the pressure difference in the delivery pipeline of each branch, resulting in excessive water mixing of some oil wells, while other oil wells are due to water mixing. Insufficient water volume leads to ultra-high back pressure at the wellhead and clogging of pipelines. In the actual product...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/10E21B43/20
Inventor 陈继昌
Owner 大庆工大技术有限公司