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Antifreezing wedge-shaped gate valve for oil field

A wedge-shaped gate and oil field technology, which is applied in the direction of sliding valves, valve devices, engine components, etc., can solve the problems of gate valve shell cracking, environmental pollution, gate valve damage, etc., and achieve the effect of simple structure and avoiding excessive pressure

Active Publication Date: 2015-11-11
徐占有
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature is low, the water in the gate cavity will expand due to freezing. As the temperature continues to decrease, the expanded volume will gradually increase. When the gate valve housing can withstand the design yield strength, the gate valve The shell cracks or breaks at the root of the thread (stress concentration point), causing damage to the gate valve
Not only pollute the environment, but also affect production

Method used

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  • Antifreezing wedge-shaped gate valve for oil field
  • Antifreezing wedge-shaped gate valve for oil field

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Embodiment Construction

[0011] The technical scheme of the present invention will be further described below in conjunction with accompanying drawing, but should not be construed as limiting the present invention:

[0012] figure 1 It is a structural schematic diagram of the present invention, figure 2 Yes figure 1 Partially enlarged schematic diagram, as shown in the figure, an antifreeze wedge gate valve for oil field, including valve body 1, valve stem 2 and gate plate 3, valve stem 2 is located inside valve body 1, valve stem 2 and valve body 1 Between them is the gate cavity 4, and the end of the valve stem 2 is connected with the gate 3. The valve stem 2 is provided with a channel one 5, which is T-shaped or L-shaped, and the transverse branch in the channel one 5 communicates with the gate chamber 4. There is a cavity 6 longitudinally in the center of the gate 3, and the cavity 6 is divided into two parts, a thick section and a thin section, from top to bottom. The cavity 6 is sequentially...

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Abstract

The invention relates to an antifreezing wedge-shaped gate valve for an oil field. A series of channels are formed in a valve rod and a gate, so that a gate cavity can be communicated with a pipeline under a certain condition; and in such a way, under the effects of volume expansion and pressure increase caused by icing inside the gate cavity, ice and water mixture can re-enter the pipeline from the gate cavity. The antifreezing wedge-shaped gate valve for an oil field has the advantage that the structure is simple; and the problem that the valve is subjected to fracture failure due to volume expansion caused by icing inside the gate cavity under a low temperature in the prior art is solved.

Description

technical field [0001] The invention belongs to the field of oilfield equipment and relates to an antifreeze wedge gate valve for oilfields. Background technique [0002] The temperature in winter in the north is low, so the gate valves of oil and water wells often freeze and crack in low temperature environments. When the gate valve is opened, the internal gate cavity will enter the high-pressure pipeline medium, and when it is closed again, the internal high-pressure medium will remain in the gate cavity and cannot be discharged. When the temperature is low, the water in the gate cavity will expand due to freezing. As the temperature continues to decrease, the expanded volume will gradually increase. When the gate valve housing can withstand the design yield strength, the gate valve The shell cracks or breaks at the root of the thread (stress concentration point), causing damage to the gate valve. Not only pollute the environment, but also affect production. Therefore, ...

Claims

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Application Information

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IPC IPC(8): F16K3/12F16K3/30F16K3/312F16K3/34
CPCF16K3/12F16K3/30F16K3/312F16K3/34
Inventor 徐占有
Owner 徐占有