CN104632128B - The anti-frozen block system of gas condensate field high pressure flowline - Google Patents
The anti-frozen block system of gas condensate field high pressure flowline Download PDFInfo
- Publication number
- CN104632128B CN104632128B CN201410855572.8A CN201410855572A CN104632128B CN 104632128 B CN104632128 B CN 104632128B CN 201410855572 A CN201410855572 A CN 201410855572A CN 104632128 B CN104632128 B CN 104632128B
- Authority
- CN
- China
- Prior art keywords
- gas
- electric
- pipeline
- high pressure
- heating belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Pipeline Systems (AREA)
Abstract
The invention discloses a kind of anti-frozen block system of gas condensate field high pressure flowline, gather and set including gas well, horizontal separator, vortex high pressure gas expansion machine, electric source connecting box, pipeline electric-heating belt, generator and transformer, horizontal separator connection gas well collection tree and vortex high pressure gas expansion machine, electric source connecting box and pipeline electric-heating belt are provided with outlet conduit and gas pipeline, vortex high pressure gas expansion machine is connected by concentric rotating shafts with generator, generator is connected by output circuit with transformer end of incoming cables, the leading-out terminal of transformer is connected with the electric source connecting box on outlet conduit and gas pipeline respectively by power transmission line, electric source connecting box electrically connects with pipeline electric-heating belt, and provide electric energy for pipeline electric-heating belt.The system is converted into heat energy using the pressure of natural gas itself, finally realizes the purpose of heat-preserving anti-freezing, and does not need extra heating furnace or antifreeze medicament, further saves the energy, whole system is simple in construction, positive effect.
Description
Technical field
The present invention relates to field of new energy technologies, the anti-frozen block system of more particularly to a kind of gas condensate field high pressure flowline
System.
Background technology
Typically during the gas extraction of gas condensate field, because natural gas density and viscosity are small, the coefficient of expansion is big, day
Pressure is high when so gas is mined, sometimes even up to 80MPa, and the pressure of bearing of natural gas line is generally 7.5MPa,
Outside natural gas it is defeated during, natural gas temperature after well head reducing pressure by regulating flow declines, and may form day with the steam of association
Right gas hydrate, causes pipe freezeup.To enable mined natural gas to carry out to collect defeated and will not occur to tie in pipeline
Frost is stifled, it is necessary to well head set simultaneously reducing pressure by regulating flow device and antifreeze deblocking technology device (heating furnace, note alcohol process unit or
Person's tracing belt for pipeline), the pressure of extraction natural gas is down to below the defeated pressure of pipe, while manage defeated temperature and be maintained at gas hydrate synthesis
It is more than temperature.Typically during well head natural gas reducing pressure by regulating flow, throttle the front and rear great pressure difference of generation, and this pressure difference does not all have
It is utilized, causes the waste of the energy.And antifreeze heating furnace technology utilization be treatment plant purification after dry gas, it is necessary to using
Pipeline reverse pumping technique, investment increase；Ethylene glycol need to set retracting device in note alcohol technique, complex process, can increase cost, tradition
Electric tracer heating system also need externally fed, high energy consumption, operating cost increase, above-mentioned three kinds of traditional anti-freezing process all need consumption outside
The energy, it is not convenient enough and economical.
In mature natural gas extraction technology, natural gas extraction pressure energy is not utilized effectively, and in order to anti-
Only the generation of gas hydrates also increases many cost inputs.At present, natural gas extraction pressure utilize and there are two kinds：
(1) to drive generator to be converted to by expanding machine pressure energy outer defeated after electric energy；(2) expanding machine generating set, heat pump are utilized
Expansion power generation and heating are carried out to well head with Environmental Heat Source.But both approaches are required for heating furnace to the pipe before expanding machine
Line is heated to prevent expander outlet frozen block, and what heating process was selected is still external heat source, and not to expander outlet
Pipeline is heated, the tangible danger that pipe freezeup is caused into gas hydrates.Above method, requirement to external heat source compared with
Height, it is affected by environment larger, pipe freezeup is not prevented comprehensively, can not be widely used.
The content of the invention
The present invention is to solve the gathering system of natural gas of traditional approach produces pressure in using natural gas extraction
Simultaneously, it is still necessary to which extra heater is heated to collection pipeline, and expander outlet pipeline is not carried out to heat easy shape
Into the technical problem of pipe freezeup.
In order to solve the above technical problems, the technical solution used in the present invention is：Gas condensate field high pressure flowline is provided
Anti- frozen block system, including gas well collection tree, horizontal separator, the mechanical, electrical source terminal box of vortex high pressure gas expansion, pipeline be electric
Heating tape, generator and transformer, gas well collection tree are connected by outlet pipe with horizontal separator, the bottom of horizontal separator
Blow-off line, one end of outlet conduit and vortex high pressure gas expansion machine that horizontal separator is set by its top are installed
Connection, the other end of vortex high pressure gas expansion machine are provided with gas pipeline, are provided with outlet conduit and gas pipeline
Electric source connecting box and pipeline electric-heating belt, vortex high pressure gas expansion machine are connected by concentric rotating shafts with generator, generator
Be connected by output circuit with transformer end of incoming cables, the leading-out terminal of transformer by power transmission line respectively with outlet conduit and appendix
Electric source connecting box connection on road, electric source connecting box electrically connects with pipeline electric-heating belt, and provides electric energy for pipeline electric-heating belt.
Preferably, in the above-mentioned technical solutions, the outlet pipe between gas well collection tree and vortex high pressure gas expansion machine
On regulating valve is installed.
Preferably, in the above-mentioned technical solutions, blowoff valve is provided with blow-off line.
Preferably, in the above-mentioned technical solutions, pipeline electric-heating belt is arranged on outlet conduit and defeated in the form of laying
In feed channel.
Preferably, in the above-mentioned technical solutions, generator utilizes electricity caused by the pressure difference of vortex high pressure gas expansion machine
Electric source connecting box upper supply tube road electric-heating belt can be linked into use.
The anti-frozen block system of high pressure flowline in gas condensate field provided by the invention, has selected expanding machine, generating set, change
The form that depressor and pipeline electric-heating belt combine, has assembled a complete energy conversion system, and the natural gas of extraction passes through
Horizontal separator separating liquid impurities, vortex high pressure gas expansion machine is subsequently entered, the gas flow of high pressure, which promotes, to be vortexed
Concentric rotating shafts on formula high pressure gas expansion machine rotate, and so as to drive generator to rotate, generator turns the pressure energy of natural gas
Electric energy is changed to, electric current is output to pipeline electric-heating belt, pipeline electric tracing by the electricity that generator is sent after transformer adjusts voltage
Band converts electrical energy into heat energy, for improving the temperature of gas in pipelines, supplements the loss of pipeline interior edge journey heat, it is ensured that pipeline
Temperature, finally realize the job requirement of heat-preserving anti-freezing.The present invention does not need extra heating furnace or antifreeze medicament, further section
The about energy, will not cause any pollution, and whole system is simple in construction, positive effect to environment.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the schematic diagram of the anti-frozen block system of high pressure flowline in gas condensate field provided by the invention.
Embodiment
As shown in figure 1, the anti-frozen block system of high pressure flowline in gas condensate field provided by the invention, including gas well collection tree
1st, horizontal separator 3, vortex high pressure gas expansion machine 5, electric source connecting box 10, pipeline electric-heating belt 11, generator 6 and transformation
Device 7, gas well collection tree 1 are connected by outlet pipe 2 with horizontal separator 3, and the bottom of horizontal separator 3 is provided with blow-off line
9, the outlet conduit 4 that horizontal separator 3 is set by its top connects with one end of vortex high pressure gas expansion machine 5, is vortexed
The other end of formula high pressure gas expansion machine 5 is provided with gas pipeline 8, and being provided with power supply on outlet conduit 4 and gas pipeline 8 connects
Line box 10 and pipeline electric-heating belt 11, vortex high pressure gas expansion machine 5 are connected by concentric rotating shafts 51 with generator 6, are generated electricity
Machine 6 is connected by output circuit 61 with the end of incoming cables of transformer 7, the leading-out terminal of transformer 7 by power transmission line 71 respectively with outlet
Road 4 connects with the electric source connecting box 10 on gas pipeline 8, and electric source connecting box 10 electrically connects with pipeline electric-heating belt 11, and is pipe
Road electric-heating belt 11 provides electric energy.
As a kind of embodiment, on the outlet pipe 2 between gas well collection tree 1 and vortex high pressure gas expansion machine 5
Regulating valve 21 is installed.The setting of regulating valve 21 causes the gas pressure into horizontal separator in suitable scope.
As a kind of embodiment, blowoff valve 91 is provided with blow-off line 9.The setting of blowoff valve 91, facilitate sleeping
Sewage discharge in formula separator 3.As a kind of embodiment, pipeline electric-heating belt 11 is arranged on out in the form of laying
On mouth pipeline 4 and gas pipeline 8.Using the form of laying so that pipeline electric-heating belt 11 is outlet conduit 4 and gas pipeline 8
More abundant during heating, the effect of the anti-frozen block of acquirement is more preferable.
As a kind of embodiment, generator 6 is connect using electric energy caused by the pressure difference of vortex high pressure gas expansion machine 5
Enter to the upper supply tube road electric-heating belt 11 of electric source connecting box 10 and use.Whole system is pipeline electric-heating belt 11 using the energy of itself
There is provided electric energy, it is not necessary to add extra aid, meet the theory of energy-saving and emission-reduction, there is very high practicality.
Implementing specific method is：Natural gas through the extraction of gas well christmas tree transports to pressure regulator valve by the outlet conduit at well head
Pressure regulation, the natural gas after pressure regulation enter horizontal separator and carry out gas-liquid separation, separate the natural gas after liquid and enter vortex height
Pressure gas expander carries out expansion decompression, and the flowing of natural gas promotes concentric rotating shafts to rotate, and so as to drive generator to rotate, generates electricity
The pressure energy of natural gas is converted to electric energy by machine；What generator was sent is electrically accessed transformer progress voltage-regulation, eventually through electricity
Source terminal box access conduit electric-heating belt, pipeline electric-heating belt convert electrical energy into heat energy, while swollen to vortex gases at high pressure
Two segment pipes carry out electric tracing before and after swollen machine.
By taking the natural gas of Sichuan Ning Qi gas fields gas well as an example, with reference to the natural gas state parameter of above gas well, to the present invention
Technical scheme be described in detail.The natural gas wellhead flowing pressure of Gas Wells In Sichuan is 80MPa, and 20 DEG C of flowing temperature, its is natural
Gas forms：Methane (93.23%), ethane (3.77%), propane (1.38%), normal butane (0.05%), iso-butane
(0.06%), nitrogen (1.51%).
Wherein, a length of 3km of the pipe line of selection, the soil moisture takes 3 DEG C at winter buried pipeline.After simulation test
Go out, temperature 60 C after well head natural gas pressure regulating, pressure 30MPa, the natural gas after separator processing heats through pipeline electric-heating belt
65 DEG C of temperature afterwards, gas pressure 14MPa after expanding machine, 26 DEG C of temperature；25 DEG C of natural gas mean temperature in electric-heating belt pipeline,
Average pressure 13.8MPa, hydrate-formation temperature are 20 DEG C.As can be seen that expander outlet gas pressure is reduced to conveying
In the range of pressure rating, frozen block will not be formed.Mean temperature is 25 DEG C in pipeline, higher than hydrate-formation temperature, in pipeline
Also frozen block will not occur.Also, heating power needed for the heating of expanding machine preceding pipeline electric-heating belt be 65kw, and pipeline is electric after expanding machine
Heating power needed for heating tape heating is 98kw, and two parts are altogether 163kw, and electric energy power is reachable as caused by expanding machine pressure difference
185kw, it is sufficient to provide electric energy needed for pipeline electric-heating belt, therefore the present invention is practicable.
The anti-frozen block system of high pressure flowline in gas condensate field provided by the invention, has selected expanding machine, generating set, change
The form that depressor and pipeline electric-heating belt combine, has assembled a complete energy conversion system, and the natural gas of extraction passes through
Horizontal separator separating liquid impurities, vortex high pressure gas expansion machine is subsequently entered, the gas flow of high pressure, which promotes, to be vortexed
Concentric rotating shafts on formula high pressure gas expansion machine rotate, and so as to drive generator to rotate, generator turns the pressure energy of natural gas
Electric energy is changed to, electric current is output to pipeline electric-heating belt, pipeline electric tracing by the electricity that generator is sent after transformer adjusts voltage
Band converts electrical energy into heat energy, for improving the temperature of gas in pipelines, supplements the loss of pipeline interior edge journey heat, it is ensured that pipeline
Temperature, finally realize the job requirement of heat-preserving anti-freezing.The present invention does not need extra heating furnace or antifreeze medicament, further section
The about energy, will not cause any pollution, and whole system is simple in construction, positive effect to environment.
It can be that professional and technical personnel in the field realize or used that above-mentioned embodiment, which is intended to illustrate the present invention, to above-mentioned
Embodiment is modified and will be apparent for those skilled in the art, therefore the present invention includes but is not limited to
Above-mentioned embodiment, it is any to meet the claims or specification description, meet with principles disclosed herein and novelty,
The method of inventive features, technique, product, each fall within protection scope of the present invention.
Claims (4)
1. the anti-frozen block system of gas condensate field high pressure flowline, including gas well collection tree, horizontal separator and vortex high pressure
Gas expander, the gas well collection tree are connected by outlet pipe with the horizontal separator, the bottom of the horizontal separator
Portion is provided with blow-off line, and the outlet conduit and the vortex gases at high pressure that the horizontal separator is set by its top are swollen
One end connection of swollen machine, the other end of the vortex high pressure gas expansion machine are provided with gas pipeline, it is characterised in that：Also wrap
Electric source connecting box, pipeline electric-heating belt, generator and transformer are included, is provided with the outlet conduit and the gas pipeline
The electric source connecting box and the pipeline electric-heating belt, the vortex high pressure gas expansion machine pass through concentric rotating shafts and the hair
Motor connection, the generator are connected by output circuit with the transformer end of incoming cables, and the leading-out terminal of the transformer passes through
Power transmission line connects with the electric source connecting box on the outlet conduit and the gas pipeline respectively, the electric source connecting box with it is described
Pipeline electric-heating belt electrically connects, and the generator utilizes electric energy access caused by the pressure difference of the vortex high pressure gas expansion machine
Used on to the electric source connecting box for the pipeline electric-heating belt, electric energy is provided for the pipeline electric-heating belt；Adopted through gas well
The natural gas of Ji Shu extraction transports to pressure regulator valve pressure regulation by the outlet conduit at well head, and the natural gas after pressure regulation enters horizontal point
Gas-liquid separation is carried out from device, the natural gas after liquid is separated and carries out expansion decompression into vortex high pressure gas expansion machine, naturally
The flowing of gas promotes concentric rotating shafts to rotate, and so as to drive generator to rotate, the pressure energy of natural gas is converted to electric energy by generator；
What generator was sent is electrically accessed transformer progress voltage-regulation, eventually through electric source connecting box access conduit electric-heating belt, pipeline
Electric-heating belt converts electrical energy into heat energy, while carries out electric tracing to two segment pipes before and after vortex high pressure gas expansion machine.
2. the anti-frozen block system of high pressure flowline in gas condensate field according to claim 1, it is characterised in that：The gas well
Regulating valve is installed on outlet pipe between collection tree and the vortex high pressure gas expansion machine.
3. the anti-frozen block system of high pressure flowline in gas condensate field according to claim 1, it is characterised in that：The blowdown
Blowoff valve is provided with pipeline.
4. the anti-frozen block system of high pressure flowline in gas condensate field according to claim 1, it is characterised in that：The pipeline
Electric-heating belt is arranged on the outlet conduit and the gas pipeline in the form of laying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855572.8A CN104632128B (en) | 2014-12-31 | 2014-12-31 | The anti-frozen block system of gas condensate field high pressure flowline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855572.8A CN104632128B (en) | 2014-12-31 | 2014-12-31 | The anti-frozen block system of gas condensate field high pressure flowline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104632128A CN104632128A (en) | 2015-05-20 |
| CN104632128B true CN104632128B (en) | 2018-03-13 |
Family
ID=53211307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410855572.8A Expired - Fee Related CN104632128B (en) | 2014-12-31 | 2014-12-31 | The anti-frozen block system of gas condensate field high pressure flowline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104632128B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178913A (en) * | 2015-08-05 | 2015-12-23 | 李宾飞 | Natural gas power generation electric heating wax removing and preventing device based on skin effect and application thereof |
| CN105863951B (en) * | 2016-04-15 | 2019-01-22 | 上海开山中夏节能科技有限公司 | High-pressure liquid natural-gas energy-saving depressurizes carburetion system and gasification method |
| CN108662434B (en) * | 2018-04-24 | 2024-02-13 | 华南理工大学 | Ultrasonic wave blocking reducing device applied to pipe network pressure energy power generation system |
| CN109162672A (en) * | 2018-09-28 | 2019-01-08 | 重庆溢信科技有限公司 | A kind of throttle system of natural gas wellhead pressure energy power generation |
| CN110469295A (en) * | 2019-08-06 | 2019-11-19 | 中国石油天然气股份有限公司 | A kind of gas well mouth throttling heating process units and method |
| CN110879196B (en) * | 2019-12-13 | 2022-02-11 | 西南石油大学 | Oil-water phase permeability testing method for oil-rich condensate gas reservoir |
| CN111677482A (en) * | 2020-06-17 | 2020-09-18 | 大庆市中瑞燃气有限公司 | High-corrosion high-pressure natural gas well exploitation and full recovery device and method |
| CN112554972A (en) * | 2020-11-25 | 2021-03-26 | 中国石油天然气股份有限公司 | Throttling heating system and method for high-pressure gas gathering station of natural gas well |
| CN114658389A (en) * | 2022-03-18 | 2022-06-24 | 贵州航天天马机电科技有限公司 | High-pressure natural gas wellhead depressurization power generation system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725681Y (en) * | 2004-07-30 | 2005-09-14 | 长春高祥特种管道有限公司 | Continuously reinforced plastic composite pipe with heating function |
| CA2588664A1 (en) * | 2007-05-09 | 2008-11-09 | Jose Lourenco | Method to produce natural gas liquids (ngl's) at gas pressure reduction stations |
| WO2010072766A3 (en) * | 2008-12-23 | 2011-03-24 | Reinhard Liehs | Apparatus for obtaining electric current |
| CN201839460U (en) * | 2010-09-17 | 2011-05-18 | 潘森林 | Tubular heater |
| CN102900640A (en) * | 2012-10-22 | 2013-01-30 | 成都昊特新能源技术有限公司 | Device for generating power by using pressure difference energy of natural gas delivery pipeline |
| CN103075129A (en) * | 2013-01-25 | 2013-05-01 | 常州易控汽车电子有限公司 | Heating control system for coalbed gas wellhead pipeline |
| CN104088605A (en) * | 2014-07-01 | 2014-10-08 | 北京工业大学 | Natural gas well mouth heating throttling system based on pressure-energy electricity generation and heat-pump heating |
| CN203962047U (en) * | 2014-06-24 | 2014-11-26 | 碧海舟（北京）石油化工设备有限公司 | Be applicable to the generating regulator of gas distributing system |
-
2014
- 2014-12-31 CN CN201410855572.8A patent/CN104632128B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725681Y (en) * | 2004-07-30 | 2005-09-14 | 长春高祥特种管道有限公司 | Continuously reinforced plastic composite pipe with heating function |
| CA2588664A1 (en) * | 2007-05-09 | 2008-11-09 | Jose Lourenco | Method to produce natural gas liquids (ngl's) at gas pressure reduction stations |
| WO2010072766A3 (en) * | 2008-12-23 | 2011-03-24 | Reinhard Liehs | Apparatus for obtaining electric current |
| CN201839460U (en) * | 2010-09-17 | 2011-05-18 | 潘森林 | Tubular heater |
| CN102900640A (en) * | 2012-10-22 | 2013-01-30 | 成都昊特新能源技术有限公司 | Device for generating power by using pressure difference energy of natural gas delivery pipeline |
| CN103075129A (en) * | 2013-01-25 | 2013-05-01 | 常州易控汽车电子有限公司 | Heating control system for coalbed gas wellhead pipeline |
| CN203962047U (en) * | 2014-06-24 | 2014-11-26 | 碧海舟（北京）石油化工设备有限公司 | Be applicable to the generating regulator of gas distributing system |
| CN104088605A (en) * | 2014-07-01 | 2014-10-08 | 北京工业大学 | Natural gas well mouth heating throttling system based on pressure-energy electricity generation and heat-pump heating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104632128A (en) | 2015-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104632128B (en) | The anti-frozen block system of gas condensate field high pressure flowline | |
| CN104088605B (en) | A kind of natural gas well head heating throttle system being generated electricity with heat pump based on pressure energy | |
| US20100000221A1 (en) | Method for producing fuel and power from a methane hydrate bed using a gas turbine engine | |
| CN104929776A (en) | Combined cycle power generation system utilizing gas and natural gas pipe network pressure energy | |
| WO2011121424A3 (en) | A method and an apparatus for obtaining energy by expanding a gas at a wellhead | |
| CN105178913A (en) | Natural gas power generation electric heating wax removing and preventing device based on skin effect and application thereof | |
| CN105065066A (en) | Internal generating set of gas pipeline | |
| PT104023A (en) | INSTALLATION TO REDUCE THE PRESSURE OF A GAS OR GAS MIXTURE | |
| CN105114045B (en) | A kind of CCUS systems recovered the oil based on gas lift method and application | |
| CN204082093U (en) | A kind of natural gas well head based on pressure energy generating and heat pump heats throttle system | |
| CN102900640A (en) | Device for generating power by using pressure difference energy of natural gas delivery pipeline | |
| CN103615357B (en) | A kind of wind energy, solar energy, sea wave energy circulation complemental power-generation and seawater desalination system | |
| CN103306761A (en) | Pressure energy power generation system adopting wellhead natural gas | |
| CN109162672A (en) | A kind of throttle system of natural gas wellhead pressure energy power generation | |
| CN204987651U (en) | Noise-reduction explosion-proof liquefaction device for sleeve gas | |
| CN109347145A (en) | A kind of natural gas wellhead pressure energy electricity generation system and variable speed constant frequency generator control method | |
| CN205370657U (en) | A power generation system and natural gas pressure regulating system for natural gas decompression measuring station | |
| CN104061031A (en) | Power generation system and method through recovery of coke oven raw coke oven gas waste heat | |
| CN103216278A (en) | Wellhead natural gas pressure energy power generation system and control method | |
| CN203515933U (en) | Generating set allowing high residual pressure of industrial fluid to be recycled through hydraulic turbine | |
| CN204827670U (en) | Utilize combined cycle generation system of gas and natural gas pipe network pressure ability | |
| CN206219537U (en) | Natural gas line separator | |
| CN204458189U (en) | Oil well associated hot water power generation system | |
| CN205535073U (en) | Novel cold energy cascade utilization system of LNG accepting station | |
| CN206419968U (en) | A kind of station boiler low-temperature flue gas heat recovering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20181231 |