CN101787862A - Blockage removal method and device for microwave hydrate for gas well - Google Patents
Blockage removal method and device for microwave hydrate for gas well Download PDFInfo
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- CN101787862A CN101787862A CN201010105837A CN201010105837A CN101787862A CN 101787862 A CN101787862 A CN 101787862A CN 201010105837 A CN201010105837 A CN 201010105837A CN 201010105837 A CN201010105837 A CN 201010105837A CN 101787862 A CN101787862 A CN 101787862A
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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:
The present invention relates to a kind of natural gas gas well and carbon dioxide gas well water compound and freeze method for removing blockage and equipment when blocking up.
Background technology:
Natural gas gas well and the production of carbon dioxide gas well all exist hydrate to freeze stifled phenomenon.In a large amount of gas field of China or contain in the development process of gas area, annual the situation that gas well freezes stifled closing well because of hydrate all appears to some extent, and bring certain difficulty for the gas well production management.
By physicochemical characteristic and phase state analysis thereof, and the ice in natural gas gas well and the carbon dioxide gas well manufacturing process is blocked up difficult problem root analyze, and saturated vapour phase critical parameters are analyzed and researched natural gas and carbon dioxide.Water and natural gas or titanium dioxide hydrate merge with forming process extremely complicated, natural gas gas well and carbon dioxide gas well be phase-state change in process of production, solid-liquid is covert, supercritical phase and gas-liquid in a disguised form can exist simultaneously, but it is covert that these phase-state change all are heat absorptions, the capital reduces gas well hydrate temperature, under certain pressure, temperature is lower than to be contained in hydrate water vapour or aqueous water formation solid ice, attached on the borehole wall and make the local well head generation throttle effect that directly diminishes, node temperature is sharply descended, and flow velocity reduces influence and produces.Well head directly diminishes and the further aggravation of throttle effect, makes local gatherings the such as solidliquid mixture of hydrate, forms and stops up.
Existing solution .1. adopts the water jacket furnace heating on well head or gas transmission line; 2. in gas well, add inhibitor such as methyl alcohol; 3. rely on the underground heat on stratum that carbon dioxide is heated; 4. the oil pipe gas production is changed into sleeve pipe gas production mode.But all have big for environment pollution, problem such as difficulty of construction is big, and cost is high.
Because being two O-H, the molecular structure of hydrone is about 105 ° of angle V font structures (different its angles of states of matter are slightly different), and very high frequency electromagnetic wave has selectivity heating property and penetrability, under the very high frequency electromagnetic wave radiation of CF and intensity, cause the electromagnetic viscosimeter effect of hydrone, increase the motion of hydrate molecule, cause the generation of heat.Obtain energy excitation and produce strong vibration, temperature is improved, change the state of hydrate.Because being two O-H keys, the molecular structure of hydrone is 105 ° of angle V font structures (different these angles of states of matter are slightly different), and very high frequency electromagnetic wave has selectivity heating property and penetrability, under the very high frequency electromagnetic wave radiation of CF and intensity, cause the electromagnetic viscosimeter effect of hydrone, increase the motion of molecule, cause the generation of heat.Obtain energy excitation and produce strong vibration, temperature is improved, change the state of water.
Summary of the invention:
The purpose of this invention is to provide a kind of gas well microwave hydrate method for removing blockage and equipment, utilize microwave electromagnetic waves to have selectivity heating property and penetrability, under the very high frequency electromagnetic wave radiation of CF and intensity, cause the electromagnetic viscosimeter effect of hydrate molecule, increase the motion of hydrate molecule, cause the generation of heat, can heat hydrate quickly and evenly, the very little efficient of heat waste is high.
Above-mentioned purpose realizes by following technical scheme:
Gas well microwave hydrate method for removing blockage, this method is: adopt the high-frequency microwave power source, import in the well casing by the wave head conduit, and make wall casing form waveguide channels, the microwave electromagnetic waves sealing is sent to hydrate freezes stifled point, make and freeze stifled node and obtain high-frequency electromagnetic wave excitation and obtain energy and improve temperature and dissolving, freeze stifled thereby solve hydrate.
Gas well microwave hydrate de-plugging equipment, its composition comprises: electric control box and microwave power supply, described electric control box and microwave power supply connect high power CW ripple microwave generator, described high power CW ripple microwave generator connects circulator, described circulator connects waveguide coaxial converter A, absorbing load and wave detector, described Waveguide coaxial converter A connects waveguide switch B by coaxial cable, described waveguide switch B connects magic T power splitter, described magic T power splitter respectively with wave head conduit A and wave head conduit B, described wave head conduit A is connected driver and tuner square tube with the wave head conduit, described driver and tuner square tube connect the wave head pedestal and produce tree.
Beneficial effect of the present invention:
1. the present invention adopts microwave method releasing hydrate to freeze and prevents the wherein formation of hydrate.Utilize microwave electromagnetic waves to have selectivity heating property and penetrability, under the very high frequency electromagnetic wave radiation of CF and intensity, cause the electromagnetic viscosimeter effect of hydrate molecule, increase the motion of molecule, cause the generation of heat.Obtain energy excitation and produce strong vibration, temperature is improved, thereby change the state of hydrate.Temperature is collective's performance of a large amount of molecular thermalmotions on the statistical significance.Utilize the gas medium heat characteristic of microwave and the penetrability of gas medium, can Fast Heating hydrate molecule and homogeneous heating.Also have the selectivity heating property, promptly the material of medium extraction gas or liquid is had the penetrability and the bad thermal conductivity of gas medium, and the hydrate molecule is had strong effect, can heat hydrate quickly and evenly just because of the high-frequency microwave electromagnetic wave.So carry out microwave radiation heating hydrate medium is whole heating, promptly heat simultaneously the inside and outside, and not to aerogenesis medium and container heating on every side, the very little efficient of heat waste is high.
2. present device installation and maintenance simple in structure are convenient, and the Jing Shu change is few during installation.
3. easily electromagnetic wave shielding is got up not loss, non-environmental-pollution.
4. can realize concentrating and monitor, control automatically and operated from a distance.
5. automatic discontinuous work or continuous operation can be set.
6. adopt equal-pressure method to improve anti-high-pressure.
7. adopt the function modoularization design.
8. running cost is cheap.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is rear elevations of driver and tuner square tube in the accompanying drawing 1.
Accompanying drawing 3 is fundamental diagrams of the present invention.
The specific embodiment:
Embodiment 1:
Gas well microwave hydrate method for removing blockage, this method is: adopt the high-frequency microwave power source, import in the well casing by the wave head conduit, and make wall casing form waveguide channels, the microwave electromagnetic waves sealing is sent to hydrate freezes stifled point, make and freeze stifled node and obtain high-frequency electromagnetic wave excitation and obtain energy and improve temperature and dissolving, freeze stifled thereby solve hydrate.
Embodiment 2:
Gas well microwave hydrate de-plugging equipment, its composition comprises: electric control box and microwave power supply 1, described electric control box and microwave power supply connect high power CW ripple microwave generator 2, described high power CW ripple microwave generator connects circulator 3, described circulator connects waveguide coaxial converter A4, absorbing load and wave detector 5, described Waveguide coaxial converter A connects waveguide switch B7 by coaxial cable 6, described waveguide switch B connects magic T power splitter 8, described magic T power splitter respectively with wave head conduit A9 and wave head conduit B10, described wave head conduit A is connected driver and tuner square tube 11 with the wave head conduit, described driver and tuner square tube connect the wave head pedestal and produce tree 12.
High power CW ripple microwave generator, it is a vacuum ceramic diode that places the stationary magnetic field in essence.Electronics interacts with the electromagnetic field of high frequency under the control of orthogonal stationary magnetic field and steady electric field in the pipe, is transformed into microwave energy obtain energy from steady electric field, thereby reaches the purpose that produces microwave energy.
The round tube that the wave head conduit mainly is made up of the metal hollow waveguide.Its main pattern is TE11, TE01 and TM01.The λ c of TE11 mould is 3.41R, but because so there is the polarization degenerate mode in the TE11 mould can not be as the mode of operation of long-distance transmissions; The λ c of TE01 mould is 1.64R, and it only exists
Component and on tube wall the Hz magnetic-field component, so the present invention adopts it to come the groundwork pattern of resonator the most, simultaneously as the transmission mode of operation; The λ c of TM01 mould is 2.62R, and only there is the Ez component in it and on tube wall
Magnetic-field component is so the present invention adopts it to come to transmit mode of operation as the microwave energy master the most.
The operating principle of wave head conduit is: microwave source has excited the microwave of TE10 mould in the square wave pezzer's catheter,mushroom cathete, the microwave mode converter is gone into spherical coupler to microwave and feed that the microwave of TE10 mould converts circular waveguide TM01 mould to, in the microwave cavity of forming jointly by the circular waveguide part and the christmas tree vertical tube of mode converter, encouraged the microwave of TM01 pattern.The present invention opens a circular hole by in end face central authorities of TE01n mode resonant cavity, connects the cut-off waveguide of an equal diameter, suitable length, when inserting dielectric resonator in the cut-off waveguide, makes to contain the medium section TE01 mould is transmitting state.Import in the well casing by waveguide and coupler, and make wall casing form waveguide channels.
The wave head pedestal is this equipment and the important and unique coupling part of production tree, the wave head pedestal fits calculating through complicated computer mould, the present invention designs and is guaranteeing to strive both meeting the requirement at scene on the microwave property basis, reduces difficulty of processing most probably and reduces cost.Wherein, focus is to make up neither an influence production and a shaft mouth operation, and the test of flexibility and changeability and the application test platform of application again, it is big to replace difficulty of processing with this, the spherical couplers that cost height and yield rate are low, laboratory principle and functional study and experiment, on-the-spot paractical research and experiment.
Control power supply and switchbox mainly comprise electrical distribution system, control system and high-pressure and low-pressure power conversion system.Electrical distribution system is the main energy sources source, except for coolant pump, illuminating lamp and control system provide the power supply, also provides power supply for high-voltage power supply converting system.Control system is mainly carried out Based Intelligent Control to entire equipment, as the sequential control of the high pressure of microwave source and low pressure, fault detect and the control of protection etc. automatically.The high-pressure and low-pressure power conversion system, being mainly used to provides anode high voltage power supply, pre-thermoelectric generator and electromagnetic circuit control for microwave source.
Electric control box reaches the electric flux that auto-control operation and relevant voltage are provided with the high power CW ripple microwave generator system of being connected to, and provides special voltage and corresponding electric flux for high power CW ripple microwave generator simultaneously.High power CW ripple microwave generator produces the High-Power Microwave bundle, and this microbeam walks to coaxial cable by circulator through waveguide coaxial converter; And harmful microwave reflection walks to absorbing load through circulator and absorbs, and does not return high power CW ripple microwave generator; Wave detector is used for monitoring the power of back wave, and Adjustment System is mated; Microbeam by circulator and waveguide coaxial converter walks to other end waveguide coaxial converter and magic T power splitter through coaxial cable, power splitter is divided into two microbeam, goes wave head conduit A and wave head conduit B respectively to encourage square tube driver and tuner square tube assembly jointly; The microwave that is energized in square tube passes through this assembly in the wave head pedestal, because the wave head pedestal is connected with producing to set, this electromagnetic wave that is energized is then by producing tree, and by connected production gas well well casing, reach the High-Power Microwave bundle is introduced in the gas well, excite and freeze stifled hydrate, produce phase-state change, remove to freeze and block up and prevent to freeze stifled purpose.
Claims (2)
1. gas well microwave hydrate method for removing blockage, it is characterized in that: this method is: adopt the high-frequency microwave power source, import in the well casing by the wave head conduit, and make wall casing form waveguide channels, microwave electromagnetic waves is sent to hydrate freezes stifled point, make and freeze stifled node and obtain high-frequency electromagnetic wave excitation and obtain energy and improve temperature and dissolving, freeze stifled thereby solve hydrate.
2. gas well microwave hydrate de-plugging equipment, its composition comprises: electric control box and microwave power supply, it is characterized in that: described electric control box and microwave power supply connect high power CW ripple microwave generator, described high power CW ripple microwave generator connects circulator, described circulator connects waveguide coaxial converter A, absorbing load and wave detector, described Waveguide coaxial converter A connects waveguide switch B by coaxial cable, described waveguide switch B connects magic T power splitter, described magic T power splitter respectively with wave head conduit A and wave head conduit B, described wave head conduit A is connected driver and tuner square tube with the wave head conduit, described driver and tuner square tube connect the wave head pedestal and produce tree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010105837A CN101787862A (en) | 2010-02-04 | 2010-02-04 | Blockage removal method and device for microwave hydrate for gas well |
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| CN201010105837A CN101787862A (en) | 2010-02-04 | 2010-02-04 | Blockage removal method and device for microwave hydrate for gas well |
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| CN101787862A true CN101787862A (en) | 2010-07-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088623A (en) * | 2014-06-19 | 2014-10-08 | 中国石油大学(华东) | Automatic hydrate preventing device for deep water gas well test and preventing method |
| CN106884628A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Joint underground heat and CO2Replacement exploitation Gas Hydrate In Sea Areas method and system |
| CN107387022A (en) * | 2017-09-11 | 2017-11-24 | 山东聊城金泰节能科技有限公司 | A kind of gas well Special electromagnetic circulation tubing and casing anti-block apparatus and its application |
| CN109212353A (en) * | 2018-09-26 | 2019-01-15 | 西南应用磁学研究所 | The waveguide junction circulator power test method of low-power source demand |
| CN110863797A (en) * | 2018-08-28 | 2020-03-06 | 中国石油化工股份有限公司 | Natural gas well gas production tree circulating heating device and using method thereof |
| CN115434693A (en) * | 2022-10-13 | 2022-12-06 | 重庆大学 | Device and method for measuring blockage position of hydrate in shaft and removing blockage |
| RU2804358C1 (en) * | 2022-10-28 | 2023-09-28 | Общество с ограниченной ответственностью "Газпром трансгаз Томск" (ООО "Газпром трансгаз Томск") | Method for removing hydrate plugs in pipelines |
-
2010
- 2010-02-04 CN CN201010105837A patent/CN101787862A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088623A (en) * | 2014-06-19 | 2014-10-08 | 中国石油大学(华东) | Automatic hydrate preventing device for deep water gas well test and preventing method |
| CN104088623B (en) * | 2014-06-19 | 2015-05-27 | 中国石油大学(华东) | Automatic hydrate preventing device for deep water gas well test and preventing method |
| CN106884628A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Joint underground heat and CO2Replacement exploitation Gas Hydrate In Sea Areas method and system |
| CN107387022A (en) * | 2017-09-11 | 2017-11-24 | 山东聊城金泰节能科技有限公司 | A kind of gas well Special electromagnetic circulation tubing and casing anti-block apparatus and its application |
| CN110863797A (en) * | 2018-08-28 | 2020-03-06 | 中国石油化工股份有限公司 | Natural gas well gas production tree circulating heating device and using method thereof |
| CN110863797B (en) * | 2018-08-28 | 2023-09-26 | 中国石油化工股份有限公司 | Natural gas well gas production tree circulation heating device and application method thereof |
| CN109212353A (en) * | 2018-09-26 | 2019-01-15 | 西南应用磁学研究所 | The waveguide junction circulator power test method of low-power source demand |
| CN109212353B (en) * | 2018-09-26 | 2021-01-26 | 西南应用磁学研究所 | Waveguide circulator power test method with low power source requirement |
| CN115434693A (en) * | 2022-10-13 | 2022-12-06 | 重庆大学 | Device and method for measuring blockage position of hydrate in shaft and removing blockage |
| RU2804358C1 (en) * | 2022-10-28 | 2023-09-28 | Общество с ограниченной ответственностью "Газпром трансгаз Томск" (ООО "Газпром трансгаз Томск") | Method for removing hydrate plugs in pipelines |
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Application publication date: 20100728 |