Heating control device of gas well annulus pressure relief pipeline

A technology for heating control devices and pressure relief pipelines, which can be applied to valve devices, isolation devices, wellbore/well components, etc.

Pending Publication Date: 2022-04-12
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, if the opening of the pressure relief needle valve is set too small, hydrate will form in the pipeline at the outlet end of the pressure relief needle valve due to the throttling effect inside the pipeline, which will lead to blockage of the pressure relief pipeline
[0004] However, at present, there is no corresponding device that can avoid the formation of hydrate inside the pressure relief pipeline when the pressure relief pipeline is released in the annulus of the gas well.

Method used

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  • Heating control device of gas well annulus pressure relief pipeline
  • Heating control device of gas well annulus pressure relief pipeline
  • Heating control device of gas well annulus pressure relief pipeline

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Embodiment Construction

[0036] 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.

[0037] In order to clearly illustrate the use process of the heating control device for the gas well annulus pressure relief pipeline provided by the embodiment of the present disclosure, first briefly introduce the structure of the gas well annulus pressure relief pipeline.

[0038] figure 1 It is a schematic structural diagram of the heating control device for the gas well annulus pressure relief pipeline provided by the embodiment of the present disclosure, combined with figure 1 , the gas well annulus of the gas well 101 is connected with a pressure relief gate valve 102 at the wellhead end, the outlet end of the pressure relief gate valve 102 communicates with the inlet end of the pressure relief needle valve 100 through the p...

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Abstract

The invention provides a heating control device of a gas well annulus pressure relief pipeline, and belongs to the technical field of natural gas extraction. The heating control device comprises a sensing unit, a heating unit, a temperature controller and a gas analyzer; the sensing unit comprises a first sensing assembly and a second sensing assembly, the first sensing assembly is connected to the inlet end of the pressure relief needle valve, the first sensing assembly is in telecommunication connection with the temperature controller, the second sensing assembly is connected to the outlet end of the pressure relief needle valve, and the second sensing assembly is in telecommunication connection with the temperature controller; the heating unit is located between the first sensing assembly and the inlet end of the pressure relief needle valve, the heating unit is in telecommunication connection with the temperature controller, the gas analyzer is connected to the outlet end of the pressure relief needle valve, and the gas analyzer is in telecommunication connection with the temperature controller. By means of the heating control device, in the gas well annulus pressure relief period, the pressure relief pipeline can be heated in real time, hydrate is prevented from being formed to block the pipeline, and it is ensured that the pressure relief process is safe and controllable.

Description

technical field [0001] The disclosure belongs to the technical field of natural gas exploitation, and in particular relates to a heating control device for an annulus pressure relief pipeline of a gas well. Background technique [0002] The abnormal pressure in the annulus of the Sangao gas well has become a common problem faced by all major oil and gas fields in China. When the annular pressure is higher than the maximum recommended pressure of the annular space, it is necessary to relieve the pressure of the annular space through the on-site emergency pressure relief pipeline. During pressure relief, in order to avoid pollution caused by sulfide discharge in the air, a sulfide combustion pool is connected to the outlet end of the pressure relief pipeline to burn and consume the sulfide. [0003] In the related technology, in order to ensure the safety of the surrounding human settlements and trees when releasing the pressure in the annulus of the gas well, the size of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B36/04E21B34/02E21B47/06E21B47/07E21B49/08
Inventor 汪晓磊刘祥康李玉飞汪传磊朱达江张林王新华
Owner PETROCHINA CO LTD
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