Pressure regulating valve

A pressure regulation and pressure technology, applied in the field of pressure regulation valves, can solve problems such as poor reliability and flexibility, heavy labor, and poor regulation effect

Pending Publication Date: 2021-03-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present disclosure provides a pressure regulating valve, which can solve the problems of relatively large pressure regulating operation, poor reliability and flexibility, and poor regulating effect in the related art

Method used

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0047] The casing that is lowered into the oil well is an indispensable pipe for oil exploitation. However, due to phenomena such as well kick or blowout, pressure will be generated in the casing, that is, casing pressure. The size of the casing pressure affects the height of the liquid level (ie, the dynamic liquid level) in the annular space formed by the tubing and the casing in the well to a certain extent, and the height of the dynamic liquid level further affects the production of the oil well. Therefore, it can be determined that reliable control of casing pressure is an effective way to ensure high and stable production of oil wells.

[0048] At present, in order to control the casing pressure, a pressure gauge capable of ...

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Abstract

The invention discloses a pressure regulating valve, and belongs to the field of petroleum engineering. The pressure regulating valve comprises a valve body with a liquid inlet cavity and a liquid outlet cavity, an elastic piece, a valve clack and a valve seat. Due to the fact that the valve clack can be driven by the elastic piece to abut against the valve seat or be broken from the valve seat, the on-off state of the liquid inlet cavity and the liquid outlet cavity can be determined by the relative position relation of the valve clack and the valve seat, and therefore the pressure in a pipecan be automatically adjusted by adopting the pressure adjusting valve. For example, the elastic piece can drive the valve clack to be broken from the valve seat under extrusion of pressure in the pipe, the liquid inlet cavity communicates with the liquid outlet cavity, and pressure relief is completed. By means of the design of the pressure regulating valve, the operation labor amount is greatlyreduced, and the regulating flexibility and reliability are good.

Description

technical field [0001] The disclosure relates to the field of petroleum engineering, in particular to a pressure regulating valve. Background technique [0002] Casing pressure (casing pressure for short) refers to the pressure applied in the annular space of the casing in the well. Reasonable control of the casing pressure can keep the dynamic fluid level at a certain height, thereby ensuring high and stable production of the oil well. [0003] In the related art, in order to control the casing pressure, a pressure gauge for displaying the casing pressure and a valve specially used for adjusting the casing pressure are generally arranged on the casing. The operator can determine the casing pressure by observing the pressure gauge, and can adjust the size of the valve based on the observed casing pressure. For example, when the casing pressure is observed to be small, the valve is increased; when the casing pressure is observed to be large, the valve is adjusted to be small...

Claims

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Application Information

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IPC IPC(8): F16K17/04F16K17/06F16K17/164F16K27/02F16K37/00
CPCF16K17/04F16K17/0486F16K17/06F16K17/164F16K27/02F16K37/0016
Inventor 安洪军王雪松孟晓春俞冬兰刘斌李影张宏波杨钊云王彩娟张清王肇晖
Owner PETROCHINA CO LTD
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