Blockage removal method and device for microwave hydrate for gas well

A hydrate and microwave technology, applied in earth-moving drilling, wellbore/well components, isolation devices, etc., can solve the problems of large environmental pollution, difficult construction, and high cost, and achieve no environmental pollution, less variation, and uniform heating. Effect

Inactive Publication Date: 2010-07-28
大庆市新中瑞环保有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems such as large environmental pollution, difficult construction, and high cost.

Method used

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  • Blockage removal method and device for microwave hydrate for gas well
  • Blockage removal method and device for microwave hydrate for gas well
  • Blockage removal method and device for microwave hydrate for gas well

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Gas well microwave hydrate plugging removal method, the method is: using a high-frequency microwave power source, leading it into the well pipe through the wave head guide tube, and making the well wall tube form a waveguide channel, sealing and transmitting the microwave electromagnetic wave to the hydrate freezing point, so that the frozen Blocking nodes receive high-frequency electromagnetic radiation to obtain energy to increase temperature and dissolve, thereby solving hydrate freezing blockage.

Embodiment 2

[0025] Gas well microwave hydrate plugging removal equipment, which consists of: an electric control box and a microwave power supply 1, the electric control box and microwave power supply are connected to a high-power continuous wave microwave generator 2, and the high-power continuous wave microwave generator is connected to Circulator 3, said circulator is connected to waveguide coaxial converter A4, absorbing load and wave detector 5, said waveguide coaxial converter A is connected to waveguide converter B7 through coaxial cable 6, said waveguide converter B is connected to the magic T power divider 8, the magic T power divider is connected with the wave head guide A9 and the wave head guide B10 respectively, and the wave head guide A and the wave head guide are connected to the exciter and the tuner square tube 11, The square tubes of the exciter and the tuner are connected to the base of the wave head and the production tree 12 .

[0026] High-power continuous wave micro...

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Abstract

The invention discloses a blockage removal method and a blockage removal device for a microwave hydrate for a gas well. The deicing technology adopted by the conventional natural gas wells and carbon dioxide gas wells is that: 1, a well mouth or a gas pipeline is heated by adopting a water jacket furnace; 2, methanol and other inhibitors are added into the gas wells; 3, the carbon dioxide gas is heated by means of terrestrial heat of the stratum; and 4, an oil pipe gas recovery mode is changed into a sleeve gas recovery mode. The deicing technology has the disadvantages of severe environmental contamination, complex technology, high labor intensity and strict technical requirement. The blockage removal method is that: a high-frequency microwave power source is adopted and is guided into a well tube through a wave head pipeline, and a waveguide channel is formed by the well wall tube; and microwave electromagnetic waves are transmitted to a hydrate freezing blockage point in an enclosing way, so that the freezing blockage point is irradiated by the high-frequency electromagnetic waves, gets energy, raises the temperature and is dissolved. Therefore, the freezing blockage problem of the hydrate is solved. The blockage removal method is used for unfreezing the gas wells.

Description

Technical field: [0001] The invention relates to a blocking removal method and equipment for natural gas wells and carbon dioxide gas wells when hydrates are frozen and blocked. Background technique: [0002] Both natural gas wells and carbon dioxide gas wells have the phenomenon of hydrate freezing and plugging. During the development of a large number of gas fields or gas-bearing areas in my country, gas wells are shut down due to hydrate freezing to varying degrees every year, which brings certain difficulties to the production management of gas wells. [0003] Through the analysis of the physical and chemical characteristics and phase state of natural gas and carbon dioxide, and the root cause of ice blockage in the production process of natural gas wells and carbon dioxide gas wells, the critical parameters of saturated vapor phase were analyzed and studied. The fusion and formation process of water and natural gas or carbon dioxide hydrate is extremely complicated. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B28/00E21B36/00
Inventor 黄圣学赵云峰张丽杰赵国峰张泽滨
Owner 大庆市新中瑞环保有限公司
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