CN102383766A - Self-heating natural gas hydrate preventing device - Google Patents
Self-heating natural gas hydrate preventing device Download PDFInfo
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- CN102383766A CN102383766A CN2011103130484A CN201110313048A CN102383766A CN 102383766 A CN102383766 A CN 102383766A CN 2011103130484 A CN2011103130484 A CN 2011103130484A CN 201110313048 A CN201110313048 A CN 201110313048A CN 102383766 A CN102383766 A CN 102383766A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a self-heating natural gas hydrate preventing device used for preventing the generation of natural gas hydrate, which can maintain the safety production of a gas well and improve the collection ratio of gas reservoir. The technical scheme is as follows: the device consists of a generating system, an electric heating system and a fixing system in a pipeline; impellers are concentrically arranged on a rotating shaft, partition plates are arranged between the adjacent impellers for division, the rotating shaft is connected with a generator and a overspeed protection device, and a gas inlet is arranged below the partition plates; a lead led out from the generating system is connected with an overheat protection device and a heating resistance wire screen, and a gas outlet is installed above the heating resistance wire screen; and a shell is installed outside the generating system and the electric heating system, a fishing head is installed at the top end of the shell, a sealing rubber ring is arranged in a gap between the shell and the wall of a shaft oil pipe, and an upper slip and a lower slip are installed between the device and the shaft oil pipe. The self-heating natural gas hydrate preventing device works by depending on stratum gas, heats continuously and stably, has obvious effects on increasing yield and saving energy, conducts the fishing operation by adopting steel wires, is convenient to operate and manage and can be applicable to production wells of natural gas.
Description
Technical field
The present invention relates to a kind of generation that is used to prevent and treat natural gas well pit shaft internal cause gas hydrates and can stop up the spontaneous heating preventing and controlling natural gas hydrate device of pit shaft.
Background technology
In the gas extraction process, natural gas is flowed in the pit shaft by the stratum, arrives ground through pit shaft.In this process, the temperature of natural gas fluid constantly reduces in pit shaft, and when gas temperature was lower than hydrate generation temperature, gas hydrates can generate in pit shaft, can stop up pit shaft when serious.
The method that control gas well pit shaft gas hydrates commonly used generate mainly contains chemical inhibitor injection method and downhole choke method.The chemical inhibitor injection method is to inject chemical agent by ground to suppress the generation of gas hydrates at pit shaft, needs regularly to inject, and has shortcomings such as cost is big, operation is dangerous, not enough safety and environmental protection.The downhole choke technology is a gas after the heat energy heating throttling of dependence stratum; Compound generates in case harness the river; But for the bigger gas well of flow, the heat source insufficiency that the stratum provides is to be heated to safe temperature with wellbore fluids at short notice, and this moment, pit shaft was prone to form the hydrate obstruction.
The present invention is converted into electric energy with gas kinetic energy in the pit shaft, utilizes natural gas fluid in the Electrothermic wire heating pit shaft again, has reached the purpose that control pit shaft gas hydrates generate.When the present invention uses separately, need not ground electric energy or injected material are provided, easy to operate, safety and environmental protection, energy conservation.The present invention also can use with chemical inhibitor injection method or downhole choke method simultaneously, to improve the effect of control gas hydrates.
Through the document investigation, the report of thinking, product, process design method and the theoretical basis research relevant aspect the generation of control gas hydrates with spontaneous-heating type preventing and controlling natural gas hydrate device and method.
Summary of the invention
The objective of the invention is: in order to safeguard the gas well safety in production and to improve gas deposit recovery efficiency; Utilization flows to the gas energy of pit shaft from the stratum; Prevent the generation of pit shaft gas hydrates, reduce well head pressure simultaneously, the spy provides a kind of spontaneous-heating type preventing and controlling natural gas hydrate device.
For achieving the above object, the present invention adopts following technical scheme: spontaneous-heating type preventing and controlling natural gas hydrate device, form by electricity generation system, electric heating system and pipeline internal fixation system; Electricity generation system is made up of overspeed protection device, generator, impeller, dividing plate, axis of rotation, air inlet port, is equipped with 4-12 impeller concentric arrangement, and impeller is installed on the axis of rotation; 4-12 dividing plate of peace separated between impeller, and axis of rotation is connected with generator, and axis of rotation is connected with overspeed protection device again; Prevent when being used to generate electricity that wheel speed is too fast, gas gets into electricity generation system inside by air inlet port, and air inlet port is installed in nethermost dividing plate below; Gas promotes wheel rotation; Impeller drives generator and produces electric energy, and electric energy is through lead input electric heating system, and gas flows into electric heating system through air guide channel; Electric heating system is made up of gas outlet, heating resistor silk screen and overtemperature protection system, takes over thermel protection device by the connecting wire that electricity generation system picks out, and is connected with the heating resistor silk screen again; The heating resistor silk screen is filled in electric heating system inside; Too high when heating resistor silk screen temperature, overtemperature protection system automatic disconnection heating resistor silk screen is connected with conductor wire, thereby protection heating resistor silk screen is because overheated and damage; It is inner that gas gets into electric heating system via air guide channel; Pass electric heating system from heating resistor silk screen space, the gas after being heated is discharged by the gas outlet, and the gas outlet is installed in heating resistance wire side on the net; The pipeline internal fixation system is made up of fishing head, sealing rubber ring, upper slips, lower slips and housing; Housing is installed in electricity generation system and electric heating system is outside; Housing is with electricity generation system and electric heating system parcel, and fishing head is installed on the housing top, is used for Unit Installation and dismounting; Sealing rubber ring is arranged on the gap of housing and pit shaft oil pipe, and upper slips and lower slips will install fixing inner with the pit shaft oil pipe; Be provided with air guide channel between electricity generation system and electric heating system.
The architectural feature of spontaneous-heating type preventing and controlling natural gas hydrate device is that front end is an electricity generation system, utilizes to get into its gas inside kinetic energy generating.The rear end is an electric heating system, utilizes electricity generation system to generate the gas that the electric energy heating is passed through.The pipeline internal fixation system is with electricity generation system and electric heating system parcel, and fishing head is put on the housing top, is used for Unit Installation and dismounting, and sealing rubber ring is used for packing housing and pit shaft oil pipe gap, and upper slips and lower slips will install fixing inner with pit shaft.
The course of work of the present invention is: spontaneous-heating type preventing and controlling natural gas hydrate device is converted into electric energy with gas kinetic energy in the pit shaft, utilizes natural gas fluid in the Electrothermic wire heating pit shaft again, has reached the purpose that control pit shaft gas hydrates generate.Device is thrown in by steel wire and is installed to the pit shaft assigned address, is fixed in tube inner wall.Housing and pit shaft oil pipe gap force the interior gas of pit shaft inner by the air inlet port inflow device.Gas promotes wheel rotation, and the driven in rotation axle rotates thereupon, generator work output electric energy.Electric energy is through lead input electric heating system, and gas flows into electric heating system through air guide channel, passes electric heating system from heating resistor silk screen space, passes electric heating system from heating resistor silk screen space, and the gas after being heated is discharged by the gas outlet.Therebetween, overspeed protection device prevents that wheel rotation is too fast, and overtemperature protection system prevents the overheated damage of heating resistor silk screen.Install once input, can begin to heat wellbore gas, the control gas hydrates generate, and need not human intervention, and are heating and continuous stable, need not import energy, and the Increasing Production and Energy Saving effect is remarkable.Device also can use with chemical inhibitor injection method or downhole choke method simultaneously, to improve the effect of control gas hydrates.When needing this device of dismounting, adopt wire Launching and Bailing.
The course of work of spontaneous-heating type preventing and controlling natural gas hydrate device is characterised in that device utilizes pipeline internal fixation system closure casing and pit shaft oil pipe gap, forces the interior gas of pit shaft inner by the air inlet port inflow device.Gas promotes wheel rotation, and the driven in rotation axle rotates thereupon, generator work output electric energy.Electric energy is through lead input electric heating system, and gas flows into electric heating system through air guide channel, passes electric heating system from heating resistor silk screen space, passes electric heating system from heating resistor silk screen space, and the gas after being heated is discharged by the gas outlet.Therebetween, overspeed protection device prevents that wheel rotation is too fast, and overtemperature protection system prevents the overheated damage of heating resistor silk screen.The present invention also can be used to prevent and treat the generation of gas hydrates in well head throttling place and gas transmission line.
Compared with prior art, the present invention has following beneficial effect: (1) has heating and continuous stable advantage; (2) rely on stratum gas work, the Increasing Production and Energy Saving effect is remarkable, improves system effectiveness greatly; (3) do not need ground energy input equipment or reagent injection device; (4) adopt the wire Launching and Bailing operation, convenient operation and management is used for gas production.
Description of drawings
Fig. 1 is the structural representation of spontaneous-heating type preventing and controlling natural gas hydrate device of the present invention.
Among the figure: 1, pit shaft oil pipe, 2, fishing head, 3, the gas outlet, 4, sealing rubber ring; 5, upper slips, 6, the heating resistor silk screen, 7, overtemperature protection system, 8, air guide channel; 9, overspeed protection device, 10, generator, 11, impeller, 12, lower slips; 13, dividing plate, 14, axis of rotation, 15, housing, 16, air inlet port.
The specific embodiment
" oil pipe, daily output 20,000 sides' natural gas gas well spontaneous-heating type preventing and controlling natural gas hydrate device is an example, and the present invention is done further explain to be applicable to 3-1/2 with one.In conjunction with accompanying drawing the present invention is described further.
Consult Fig. 1.Spontaneous-heating type preventing and controlling natural gas hydrate device is made up of electricity generation system, electric heating system and pipeline internal fixation system, and electricity generation system is made up of overspeed protection device 9, generator 10, impeller 11, dividing plate 13, axis of rotation 14, air inlet port 16; 4 impeller 11 concentric arrangement; Separated by dividing plate 13 each other, and be connected with generator 10 with axis of rotation 14, axis of rotation 14 is connected with overspeed protection device 9 simultaneously; Prevent when being used to generate electricity that impeller 11 rotating speeds are too fast; Gas gets into electricity generation system inside by air inlet port 16, promotes impeller 11 and rotates, and impeller drives generator 10 and produces electric energy; Electric energy is through lead input electric heating system, and gas flows into electric heating system through air guide channel 8; Electric heating system is made up of gas outlet 3, heating resistor silk screen 6 and overtemperature protection system 7.The lead that is picked out by electricity generation system is connected with heating resistor silk screen 6 via overtemperature protection system 7; Heating resistor silk screen 6 is filled in electric heating system inside, and too high when heating resistor silk screen 6 temperature, overtemperature protection system 7 automatic disconnection heating resistor silk screens 6 are connected with conductor wire; Thereby protection heating resistor silk screen 6 is because overheated and damage; It is inner that gas gets into electric heating system via air guide channel 8, passes electric heating system from heating resistor silk screen 6 spaces, and the gas after being heated is discharged by gas outlet 3; The pipeline internal fixation system is made up of fishing head 2, sealing rubber ring 4, upper slips 5, lower slips 12 and housing 15; Housing 15 is with electricity generation system and electric heating system parcel; Fishing head 2 is put on housing 15 tops; Be used for Unit Installation and dismounting, sealing rubber ring 4 is used for packing housing 15 and pit shaft oil pipe 1 gap, and upper slips 5 will install fixing inner with pit shaft with lower slips 12.
Spontaneous-heating type preventing and controlling natural gas hydrate device is converted into electric energy with gas kinetic energy in the pit shaft, utilizes natural gas fluid in the Electrothermic wire heating pit shaft again, has reached the purpose that control pit shaft gas hydrates generate.Spontaneous-heating type preventing and controlling natural gas hydrate device utilizes pipeline internal fixation system closure casing 15 and pit shaft oil pipe 1 gap, forces the interior gas of pit shaft inner by air inlet port 16 inflow devices.Gas promotes impeller 11 and rotates, and driven in rotation axle 14 rotates thereupon, generator 10 work output electric energy.Electric energy is through lead input electric heating system, and gas flows into electric heating system through air guide channel 8, passes electric heating system from heating resistor silk screen 6 spaces, passes electric heating system from heating resistor silk screen 6 spaces, and the gas after being heated is discharged by gas outlet 3.Therebetween, overspeed protection device 9 prevents that wheel rotation is too fast, and overtemperature protection system 7 prevents the 6 overheated damages of heating resistor silk screen.
Claims (1)
1. spontaneous-heating type preventing and controlling natural gas hydrate device; Be made up of electricity generation system, electric heating system and pipeline internal fixation system, it is characterized in that: heat-generating system is installed in the device front end, is made up of overspeed protection device, generator, impeller, dividing plate, axis of rotation, air inlet port; Be equipped with 4-12 impeller (11) concentric arrangement; Impeller (11) is installed on the axis of rotation (14), 4-12 dividing plate (13) is installed between the impeller is separated, and axis of rotation (14) is connected with generator (10); Axis of rotation (14) is connected with overspeed protection device (9) again, and air inlet port (16) is installed in nethermost dividing plate below; Electric heating system is in the device rear end; Constitute by gas outlet, heating resistor silk screen and overtemperature protection system; Connecting wire by above-mentioned electricity generation system picks out is taken over thermel protection device (7); Connect heating resistor silk screen (6) again, heating resistor silk screen (6) is filled in electric heating system inside, and gas outlet (3) are installed in heating resistor silk screen (6) top; The pipeline internal fixation system is made up of fishing head, sealing rubber ring, upper slips, lower slips and housing; Housing (15) is installed in electricity generation system and electric heating system is outside; With electricity generation system and electric heating system parcel; Fishing head (2) is installed on housing (15) top; Sealing rubber ring (4) is arranged on the space between housing (15) and the pit shaft oil pipe (1), and upper slips (5) is installed between device top and pit shaft oil pipe (1), and lower slips (12) is installed between device bottom and pit shaft oil pipe (1); Be provided with air guide channel (8) between electricity generation system and electric heating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103130484A CN102383766B (en) | 2011-10-17 | 2011-10-17 | Self-heating natural gas hydrate preventing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103130484A CN102383766B (en) | 2011-10-17 | 2011-10-17 | Self-heating natural gas hydrate preventing device |
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| CN102383766A true CN102383766A (en) | 2012-03-21 |
| CN102383766B CN102383766B (en) | 2013-11-27 |
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| CN2011103130484A Expired - Fee Related CN102383766B (en) | 2011-10-17 | 2011-10-17 | Self-heating natural gas hydrate preventing device |
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Cited By (9)
| 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 |
| CN104343416A (en) * | 2014-10-24 | 2015-02-11 | 中国石油大学(华东) | Deep water gas well test system and test method |
| CN104453785A (en) * | 2014-10-21 | 2015-03-25 | 西南石油大学 | Pneumatic heating device preventing hydrates from being generated at throttling part of gas well |
| CN106015940A (en) * | 2016-07-12 | 2016-10-12 | 青岛科技大学 | Intelligent no-consumption crude oil boost device and method |
| CN108351074A (en) * | 2015-09-16 | 2018-07-31 | 沙特阿拉伯石油公司 | Self energizing formula pipeline hydrate prevention system |
| CN112505161A (en) * | 2020-12-01 | 2021-03-16 | 西南石油大学 | Device and method for measuring content and precipitation amount of aromatic hydrocarbon substances in natural gas |
| CN112539042A (en) * | 2020-12-21 | 2021-03-23 | 吉林大学 | Device and method for inhibiting generation of hydrate in shaft by automatic early warning and heating |
| CN114109314A (en) * | 2021-11-25 | 2022-03-01 | 西南石油大学 | Device for monitoring, preventing and treating hydrate in throttle well |
| US11448060B2 (en) | 2020-03-27 | 2022-09-20 | Saudi Arabian Oil Company | Method and system for monitoring and preventing hydrate formations |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046922U (en) * | 1989-04-11 | 1989-11-01 | 四川石油管理局川中矿区油气勘探开发研究所 | Fish-able type bridge plug sealer |
| CN2299150Y (en) * | 1997-09-03 | 1998-12-02 | 孙平 | Non-source magnetic and electrical conversion device for petroleum extraction and transport |
| DE10203469A1 (en) * | 2001-01-25 | 2002-08-01 | Ralf Oberste | Wind energy to mechanical energy conversion process involves taking heated air out via shaft containing rotating devices and heat exchangers |
| CN201013526Y (en) * | 2007-03-01 | 2008-01-30 | 中国海洋石油总公司 | Down-hole turbogenerator |
| CN201083112Y (en) * | 2007-08-29 | 2008-07-09 | 辽宁华孚石油高科技股份有限公司 | Wind electricity oil well and pipeline heat tracing device |
| CN201269096Y (en) * | 2008-10-15 | 2009-07-08 | 中国石化集团胜利石油管理局钻井工艺研究院 | Down-hole electric generating apparatus |
| CN102203522A (en) * | 2008-08-22 | 2011-09-28 | 尼古拉·莱克 | Self contained in-ground geothermal generator |
-
2011
- 2011-10-17 CN CN2011103130484A patent/CN102383766B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046922U (en) * | 1989-04-11 | 1989-11-01 | 四川石油管理局川中矿区油气勘探开发研究所 | Fish-able type bridge plug sealer |
| CN2299150Y (en) * | 1997-09-03 | 1998-12-02 | 孙平 | Non-source magnetic and electrical conversion device for petroleum extraction and transport |
| DE10203469A1 (en) * | 2001-01-25 | 2002-08-01 | Ralf Oberste | Wind energy to mechanical energy conversion process involves taking heated air out via shaft containing rotating devices and heat exchangers |
| CN201013526Y (en) * | 2007-03-01 | 2008-01-30 | 中国海洋石油总公司 | Down-hole turbogenerator |
| CN201083112Y (en) * | 2007-08-29 | 2008-07-09 | 辽宁华孚石油高科技股份有限公司 | Wind electricity oil well and pipeline heat tracing device |
| CN102203522A (en) * | 2008-08-22 | 2011-09-28 | 尼古拉·莱克 | Self contained in-ground geothermal generator |
| CN201269096Y (en) * | 2008-10-15 | 2009-07-08 | 中国石化集团胜利石油管理局钻井工艺研究院 | Down-hole electric generating apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 郭平等: "《天然气水合物气藏开发》", 31 August 2006, 石油工业出版社 * |
Cited By (12)
| 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 |
| CN104453785A (en) * | 2014-10-21 | 2015-03-25 | 西南石油大学 | Pneumatic heating device preventing hydrates from being generated at throttling part of gas well |
| CN104343416A (en) * | 2014-10-24 | 2015-02-11 | 中国石油大学(华东) | Deep water gas well test system and test method |
| CN108351074A (en) * | 2015-09-16 | 2018-07-31 | 沙特阿拉伯石油公司 | Self energizing formula pipeline hydrate prevention system |
| CN106015940A (en) * | 2016-07-12 | 2016-10-12 | 青岛科技大学 | Intelligent no-consumption crude oil boost device and method |
| US11448060B2 (en) | 2020-03-27 | 2022-09-20 | Saudi Arabian Oil Company | Method and system for monitoring and preventing hydrate formations |
| CN112505161A (en) * | 2020-12-01 | 2021-03-16 | 西南石油大学 | Device and method for measuring content and precipitation amount of aromatic hydrocarbon substances in natural gas |
| CN112539042A (en) * | 2020-12-21 | 2021-03-23 | 吉林大学 | Device and method for inhibiting generation of hydrate in shaft by automatic early warning and heating |
| CN112539042B (en) * | 2020-12-21 | 2023-12-15 | 吉林大学 | Device and method for automatically pre-warning, heating and inhibiting generation of shaft hydrate |
| CN114109314A (en) * | 2021-11-25 | 2022-03-01 | 西南石油大学 | Device for monitoring, preventing and treating hydrate in throttle well |
| CN114109314B (en) * | 2021-11-25 | 2022-06-17 | 西南石油大学 | Device for monitoring, preventing and treating hydrate in throttle well |
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| CN102383766B (en) | 2013-11-27 |
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