CN207437031U - Oilfield liquids carbon dioxide injection device - Google Patents
Oilfield liquids carbon dioxide injection device Download PDFInfo
- Publication number
- CN207437031U CN207437031U CN201720432173.XU CN201720432173U CN207437031U CN 207437031 U CN207437031 U CN 207437031U CN 201720432173 U CN201720432173 U CN 201720432173U CN 207437031 U CN207437031 U CN 207437031U
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- plunger pump
- controller
- pump
- valve
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of oilfield liquids carbon dioxide injection devices, belong to oilfield exploitation technical field.The injection device includes：CO2Tank car, the CO2Tank car has canned motor pump；Inlet pipe, the inlet pipe are connected to form liquid feeding pipeline with the canned motor pump；Carbon dioxide plunger pump, the entrance of the carbon dioxide plunger pump and the other end of inlet pipe connect；Variable-frequency motor is connected with carbon dioxide plunger pump；Controller is connected with variable-frequency motor；Liquid pipeline is squeezed, one end of the crowded liquid pipeline is connected with the outlet of carbon dioxide plunger pump, the other end and production tree connect；It squeezes on liquid pipeline and is provided with safety valve, electro connecting pressure gauge, outlet pressure transmitter, blow valve and pump discharge valve；Electro connecting pressure gauge and outlet pressure transmitter are connected respectively with the controller；Wherein, multiple interlock protection is collectively formed in electro connecting pressure gauge, outlet pressure transmitter, controller, safety valve, and security performance is high.
Description
Technical field
The utility model is related to oilfield exploitation technical field, more particularly to a kind of oilfield liquids carbon dioxide injection device.
Background technology
CO2The displacement of reservoir oil is an important means in oilfield gas injection tertiary oil recovery technology, this technology is suitable for conventional oil reservoir,
Especially to low permeability and ultra-low permeability reservoirs, oil recovery factor can be significantly improved, meets the needs of oil field development.Further, it is also possible to
Solve the problems, such as sealing up for safekeeping for carbon dioxide, environment protection.Under energy scarcity and the background of energy-saving and emission-reduction, this technology has non-
Often wide promotion prospect.At present, China has begun to be directed to oil field note CO2The research and development and application of tertiary oil recovery technology.For
Storage and conevying efficiency are improved, is reduced liquid CO2The sky high cost injected after gasification will be often injected in site operation low
Warm liquid CO2。
China's Shengli Oil Field, Daqing oil field and Jiangsu oilfield etc. have carried out the research of carbon dioxide flooding oil tech very early,
Injection device used and technological process are mostly relatively simple, and function is single.Mainly by tank car, corrugated flexible hose, generator, CO2
The compositions such as plunger pump, safety valve, pressure gauge, blow valve and high pressure line.Corrugated flexible hose is directly and CO2Plunger pump low-pressure inlet end
Liquid carbon dioxide is delivered to CO by connection, the canned motor pump carried by tank car2The pump chamber of plunger pump, then driven by motor
CO2Liquid carbon dioxide supercharging is squeezed into oil well by plunger pump.
In work progress, highest injection pressure is controlled by safety valve, during superpressure safety valve jumping up pressure release to support personnel,
Equipment and oil security.Due to carbon dioxide category cryogenic media, long-term injection may cause safety valve internal seal failure.Such as
Fruit injection pressure is more than extreme design pressure still not take-off, it is possible to can be damaged to stratum, to construction personnel and gas injection
Threat caused by equipment.In addition, needing to carry out equipment pressure testing before each elephant requirement injection, pressure value is difficult often control
System, when operation, are very easy to superpressure, cause pipeline thorn leakage frostbite, stab operative employee, it is also possible to safety valve jumping up be caused to fail.Cause
This, the shortcomings that existing injection device is single there are overpressure protection, and security is not high.
Utility model content
The purpose of this utility model is to provide a kind of oilfield liquids carbon dioxide injection device, realizes carbon dioxide injection
Multiple interlock protection, smooth running is reliable, and security performance is high.
To achieve the above object, the utility model provides a kind of oilfield liquids carbon dioxide injection device, with production tree
Connection, for recovering the oil to oil well injection liquid carbon dioxide, the injection device includes：
For providing the CO of liquid carbon dioxide2Tank car, the CO2Tank car has canned motor pump；
Inlet pipe, one end of the inlet pipe are provided with adapter assembly, the adapter assembly and the canned motor pump
Feed flow end connects to form liquid feeding pipeline；
Carbon dioxide plunger pump, the entrance of the carbon dioxide plunger pump are connected with the other end of the inlet pipe；
The carbon dioxide plunger pump is driven squeeze the variable-frequency motor of liquid, the variable-frequency motor and the carbon dioxide column
Plug pump connection；
Controller is connected with the variable-frequency motor, and the operating status of the carbon dioxide plunger pump is controlled；
Liquid pipeline is squeezed, one end of the crowded liquid pipeline is connected with the outlet of the carbon dioxide plunger pump, the other end and institute
State production tree connection；Be provided on the crowded liquid pipeline safety valve, electro connecting pressure gauge, outlet pressure transmitter, blow valve and
Pump discharge valve；Wherein, the outlet pressure transmitter is connected with the controller, for gathering the carbon dioxide plunger pump
Exit pressure levels and be sent to the controller；The electro connecting pressure gauge is connected with the controller, is stopped for setting limit
Machine pressure value, and when the exit pressure levels reach the limit and shut down pressure value, stopping signal is sent to the controller；
Wherein, the controller receives the stopping signal and the carbon dioxide plunger pump is controlled to shut down, meanwhile, it is described
Controller receives the exit pressure levels, when the exit pressure levels reach the highest shutdown pressure value set in the controller
When, the controller controls the carbon dioxide plunger pump to shut down, and realizes dual stoppage protection；When the dual stoppage protection loses
Effect, when the exit pressure levels continue to increase to equal with the set-pressure of the safety valve, the safety valve carries out machinery and lets out
Pressure, forms multiple interlock protection.
Further, the adapter assembly is provided with multiple；Wherein, the feed flow end of the first adapter assembly and the canned motor pump
Connection forms the liquid feeding pipeline, and the second adapter assembly is connected to form return line with the reflux end of the canned motor pump, remaining connects
Head assembly gives over to spare.
Further, each adapter assembly includes interface, and the interface is connected with the inlet pipe, the interface
Feed liquor ball valve is provided between the inlet pipe, the interface is connected with blow-down pipe, is provided on the blow-down pipe
It is vented ball valve.
Further, it is provided with the air relief cock communicated with pump chamber on the pump head of the carbon dioxide plunger pump.
Further, the injection device further includes：Ball-and-seat；The ball-and-seat is arranged on the crowded liquid pipeline, and
The ball-and-seat is located at the other end of the crowded liquid pipeline close at the production tree, for preventing the Christmas tree wellhead anti-
Liquid.
Further, the injection device further includes：It is vented needle-valve；The emptying needle-valve is arranged at the crowded liquid pipeline
On, and the emptying needle-valve is between the ball-and-seat and the production tree.
The one or more technical solutions provided in the utility model embodiment, at least have the following technical effect that or excellent
Point：
1st, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by carbon dioxide plunger
Safety valve, electro connecting pressure gauge, outlet pressure transmitter, the outlet pressure transmitter and control are set on the crowded liquid pipeline of pump
Device connects, for gathering the exit pressure levels of the carbon dioxide plunger pump and being sent to controller, the electro connecting pressure gauge
It is connected with controller, pressure value is shut down for setting to limit, and when the exit pressure levels reach the limit and shut down pressure value, to
The controller sends stopping signal；Wherein, the controller receives the stopping signal and/or the exit pressure levels, right
The operating status of the carbon dioxide plunger pump is controlled, and electro connecting pressure gauge forms dual stoppage protection with controller；When
The dual stoppage protection failure, when the exit pressure levels continue to increase to equal with the set-pressure of the safety valve, institute
It states safety valve and carries out mechanical pressure release；It in this way, forming multiple interlock protection, prevents super design pressure from constructing, ensures to the greatest extent
Personnel, stratum and oil security have the advantages of smooth running is reliable, and security performance is high.
2nd, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by carbon dioxide plunger
Multiple adapter assemblies in the inlet pipe of pump are set, partial CO 2 can be flowed back in CO2In tank car, realize in formation depletion
When to inject flow velocity control, solve the problems, such as formation depletion state bet inbound traffics be unable to control；And it is possible to connect simultaneously
Meet more CO2Tank car, continuous uninterrupted injection carbon dioxide, simplifies operating process, improves work efficiency.
3rd, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by being leaned on liquid pipeline is squeezed
The problem of nearly Christmas tree wellhead end sets ball-and-seat, can prevent the anti-liquid of well head from carbon dioxide plunger pump being made not start normally.
Description of the drawings
Fig. 1 is the structure diagram for the oilfield liquids carbon dioxide injection device that the utility model embodiment provides；
Fig. 2 is the utility model embodiment offer using oilfield liquids carbon dioxide injection device progress carbon dioxide note
The method flow diagram entered；
Fig. 3 is the utility model embodiment offer using oilfield liquids carbon dioxide injection device progress carbon dioxide note
The another method flow diagram entered.
In figure, 1-CO2Tank car, 2- corrugated flexible metal tubes, 3- adapter assemblies, 301- first interfaces, 302- the first feed liquor balls
Valve, the emptying ball valves of 303- first, the first blow-down pipes of 304-, 305- second interfaces, 306- the second feed liquor ball valves, 307- second are put
Empty ball valve, the second blow-down pipes of 308-, the 3rd interfaces of 309-, the 3rd feed liquor ball valves of 310-, 311- the 3rd are vented ball valve, 312- the
Three blow-down pipes, 4- canned motor pumps, 5- inlet pipes, 6- squeeze liquid pipeline, 7- flowmeters, 8- inlet pressure transmitters, 9- variable-frequency electrics
Machine, 10- carbon dioxide plunger pumps, 11- air relief cocks, 12- safety valves, 13- electro connecting pressure gauges, 14- outlet pressure transmitters,
15- blow valves, 16- ball-and-seats, 17- emptying needle-valves, 18- controllers, 19- pump discharge valves, 20- alarms.
Specific embodiment
The utility model embodiment provides a kind of oilfield liquids carbon dioxide injection device, realizes carbon dioxide injection
Multiple interlock protection, smooth running is reliable, and security performance is high.
To achieve the above object, the utility model embodiment provides a kind of oilfield liquids carbon dioxide injection device, with
Production tree connects, for recovering the oil to oil well injection liquid carbon dioxide, as shown in Figure 1, the injection device includes：
For providing the CO of liquid carbon dioxide2Tank car 1, the CO2Tank car 1 has canned motor pump 4；
Inlet pipe 5, one end of the inlet pipe 5 are provided with adapter assembly, the adapter assembly 3 and the canned motor pump
4 feed flow end connects to form liquid feeding pipeline；
Carbon dioxide plunger pump 10, the entrance of the carbon dioxide plunger pump 10 and the other end of the inlet pipe 5 connect
It connects；
The carbon dioxide plunger pump 10 is driven squeeze the variable-frequency motor 9 of liquid, the variable-frequency motor 9 and the titanium dioxide
Carbon plunger pump 10 connects；
Controller 18 is connected with the variable-frequency motor 9, and the operating status of the carbon dioxide plunger pump 10 is controlled
System；
Liquid pipeline 6 is squeezed, one end of the crowded liquid pipeline 6 is connected with the outlet of the carbon dioxide plunger pump 10, the other end
It is connected with the production tree；Safety valve 12, electro connecting pressure gauge 13, outlet pressure transmitter are provided on the crowded liquid pipeline 6
14th, blow valve 15 and pump discharge valve 19；Wherein, the outlet pressure transmitter 14 is connected with the controller 18, for adopting
Collect the exit pressure levels of the carbon dioxide plunger pump 10 and be sent to the controller；The electro connecting pressure gauge 13 with it is described
Controller 18 connects, and pressure value is shut down for setting to limit, and when the exit pressure levels reach the limit and shut down pressure value, to
The controller 18 sends stopping signal；
Wherein, the controller 18 receives the stopping signal and the carbon dioxide plunger pump 10 is controlled to shut down, meanwhile,
The controller 18 receives the exit pressure levels, stops when the exit pressure levels reach the highest that is set in the controller 18
During machine pressure value, the controller 18 controls the carbon dioxide plunger pump 10 to shut down, and realizes dual stoppage protection；When described double
Weight stoppage protection failure, when the exit pressure levels continue to increase to equal with the set-pressure of the safety valve 12, the peace
Full valve 12 carries out mechanical pressure release, forms multiple interlock protection.
In the present embodiment, the injection device further includes：Alarm 20；The alarm 20 connects with the controller 18
It connects, the controller 18 is additionally operable to setting alarm pressure value, when the exit pressure levels that the controller 18 receives reach institute
When stating alarm pressure value, the controller 18 controls the alarm 20 to alarm；Wherein, the alarm pressure value is less than institute
It states limit and shuts down pressure value.Reach control alarm 20 before the limit shuts down pressure value in the exit pressure levels to alarm, it can
Pressure value is shut down for site operation personnel to be reminded to be up to limit, should be noted safety, emergent or shutdown is carried out and prepares.Alarm
20th, controller 18, electro connecting pressure gauge 13, outlet pressure transmitter 14 and safety valve 12 play multiple interlock protection jointly.
In the present embodiment, the adapter assembly 3 is provided with multiple；Wherein, the first adapter assembly passes through corrugated flexible metal tube 2
Be connected to form the liquid feeding pipeline with the feed flow end of the canned motor pump 4, the second adapter assembly by corrugated flexible metal tube 2 with it is described
The reflux end of canned motor pump 4 connects to form return line, remaining adapter assembly gives over to spare, can be effectively increased injected system discharge capacity control
Scope processed.Selecting the oil well of carbon dioxide injection, mostly formation depletion is serious, and carbon dioxide plunger pump 10 goes out after equipment runs well
Mouth pressure value is less than inlet pressure level, and normally open is would be at since there are the tapping valves of pressure difference carbon dioxide plunger pump 10,
And pressure difference more big flow is bigger, and it is more close with the metered flow of canned motor pump 4,9 frequency of variable-frequency motor is adjusted by controller 18 at this time
The method of rate controls the size of flow can not to realize.If flow is more than design maximum discharge capacity or in CO2Tank car 1
Quickly noted and follow-up tank car can not reaching on the time when, construction effect will be influenced.By the way that multiple adapter assemblies 3 is set to be formed back
Flow tube road can flow back partial CO 2 in CO2In tank car 1, the control to injection rate in formation depletion is realized, solve
It has determined under formation depletion state, has injected the problem of flow is unable to control；In addition, by setting multiple adapter assemblies 3, it can be simultaneously
Connect more CO2Tank car, continuous continual carbon dioxide injection, avoids and works as CO2CO in tank car 12Midway is needed to shut down after having noted to tear open
Except rear next CO2Tank car could reconnect the problem of injection, improve production efficiency.
Wherein, each adapter assembly 3 includes interface, and the interface is connected with the inlet pipe 5, the interface and
Feed liquor ball valve is provided between the inlet pipe 5, the interface is connected with blow-down pipe, is provided with and puts on the blow-down pipe
Empty ball valve.The blow-down pipe leads to the high-pressure side of the carbon dioxide plunger pump 10, prevents the dry ice of emptying to operating personnel
It damages.
The adapter assembly 3 sets three or three or more, it is preferred that the adapter assembly sets three, including first
Adapter assembly, the second adapter assembly and the 3rd adapter assembly；Wherein, first adapter assembly includes and the inlet pipe 5
The first interface 301 of connection is provided with the first feed liquor ball valve 302, institute between the first interface 301 and the inlet pipe 5
It states first interface 301 and is connected with the first blow-down pipe 304, the first emptying ball valve is provided on first blow-down pipe 304
303；Second adapter assembly includes the second interface 305 being connected with the inlet pipe 5, the second interface 305 and institute
It states and is provided with the second feed liquor ball valve 306 between inlet pipe 5, the second interface 305 is connected with the second blow-down pipe 308, institute
It states and the second emptying ball valve 307 is provided on the second blow-down pipe 308；3rd adapter assembly includes and the inlet pipe 5
3rd interface 309 of connection, is provided with the 3rd feed liquor ball valve 310, institute between the 3rd interface 309 and the inlet pipe 5
It states the 3rd interface 309 and is connected with the 3rd blow-down pipe 312, the 3rd emptying ball valve is provided on the 3rd blow-down pipe 312
311.Specifically, the first interface 301 is connected to form institute by corrugated flexible metal tube 2 with the feed flow end of the canned motor pump 4
Liquid feeding pipeline is stated, the second interface 305 is connected to form reflux by corrugated flexible metal tube 2 with the reflux end of the canned motor pump 4
Pipeline, the 3rd interface 309 are used as and next CO2The spare interface of tank car connection.
In the present embodiment, the air relief cock 11 communicated with pump chamber is provided on the pump head of the carbon dioxide plunger pump 10.It is excellent
Choosing, set air relief cock 11 sets pump chamber centre positions that are multiple, and being arranged at the carbon dioxide plunger pump 10.Pass through unlatching
The air relief cock 11 can quickly and effectively discharge the gas in 10 pump chamber of carbon dioxide plunger pump, make the carbon dioxide
Plunger pump 10 runs well, and solves the problems, such as that gas lock occurs in the process of running in carbon dioxide plunger pump 10, it is therefore prevented that because of gas
Lock causes the outlet of carbon dioxide plunger pump 10 can not build the pressure.
In the present embodiment, the injection device further includes：The flowmeter 7 and entrance pressure being arranged in the inlet pipe 5
Power transmitter 8；The flowmeter 7 and the inlet pressure transmitter 8 are connected with the controller 18, are respectively used to measurement institute
State the flow of inlet pipe 5 and the inlet pressure level of the carbon dioxide plunger pump 10.
In the present embodiment, the injection device further includes：Ball-and-seat 16；The ball-and-seat 16 is arranged at the crowded liquid pipeline
On 6, and the ball-and-seat 16 is located at the other end of the crowded liquid pipeline 6 close at the production tree, for preventing the oil recovery
Set the anti-liquid of well head.When injection device is because of disorderly closedown, opening Christmas tree wellhead valve, restarts carbon dioxide plunger after maintenance
When pumping 10, carbon dioxide meeting reflux is injected before into crowded liquid pipeline 6, the setting of ball-and-seat 16 plays the anti-liquid of cut-off, keeps away
Exempt from liquid and flow into the problem of carbon dioxide plunger pump 10 causes can not operate normally.
In the present embodiment, the injection device further includes：It is vented needle-valve 17；The emptying needle-valve 17 is arranged at the crowded liquid
On pipeline 6, and the emptying needle-valve 17 is between the ball-and-seat 16 and the production tree.The emptying needle-valve 17 is used to let out
Pressure.
In the present embodiment, the injection device further includes intelligent terminal；The intelligent terminal is connected with the controller 18,
For obtaining the data of the controller 18, human-computer interaction is realized；Wherein, the intelligent terminal includes：Smart mobile phone is flat
Plate computer or the intelligent terminal for possessing independent operating system and independent running space.
It should be noted that the position of the flowmeter 7 and the inlet pressure transmitter 8 can exchange, from Fig. 1
The limitation of position.In addition, the safety valve 12, electro connecting pressure gauge 13, outlet pressure transmitter 14, blow valve 15 and pump discharge
The relative position of valve 19 is also from the limitation of position in Fig. 1.
The oilfield liquids carbon dioxide injection device of the utility model embodiment offer is provided by more than content,
By setting alarm 20, electro connecting pressure gauge 13, outlet pressure on the crowded liquid pipeline 6 of 10 high-pressure side of carbon dioxide plunger pump
Transmitter 14, safety valve 12 collectively constitute multistage interlock protection with controller 18, prevent super design pressure from constructing, utmostly
Personnel, stratum and oil security are ensured；It, can be by portion by setting multiple adapter assemblies 3 in the inlet pipe 5 of low-pressure end
Divide carbon dioxide reflux in CO2In tank car, realize in formation depletion to injecting the control of flow, while more can also be connected
CO2Tank car realizes continuous uninterrupted injection, improves work efficiency；It is put by being set on the pump chamber of carbon dioxide plunger pump 10
Vent plug 11 avoids carbon dioxide plunger pump 10 and occurs the problem of gas lock in the process of running；By close on crowded liquid pipeline 6
Ball-and-seat 16 is set at Christmas tree wellhead, and the anti-liquid of well head makes carbon dioxide plunger pump 10 can not when avoiding restarting equipment after shutting down
The problem of startup.
On the other hand, the utility model embodiment additionally provides a kind of use oilfield liquids carbon dioxide injection device
The method for carrying out carbon dioxide injection, as shown in Fig. 2, including：
Step S110：First adapter assembly 3 is connected to form liquid feeding pipeline with the feed flow end of canned motor pump 4, closes blow valve
15th, needle-valve 17 is vented, opens pump discharge valve 19；
Step S120：Precooling is carried out to the liquid feeding pipeline；
Step S130：Precooling is carried out to inlet pipe 5, starts variable-frequency motor 9 after precooling and drives carbon dioxide plunger pump 10
Liquid is squeezed in supercharging, injects liquid carbon dioxide to production tree；
Step S140：Setting limit shuts down pressure value on electro connecting pressure gauge 13, and highest is set on controller 18 and is shut down
Pressure value；The exit pressure levels of acquisition carbon dioxide plunger pump 10 are simultaneously sent to controller 18；When the exit pressure levels reach
When the limit shuts down pressure value, the electro connecting pressure gauge 13 sends stopping signal, the controller 18 to the controller 18
It receives the stopping signal and the carbon dioxide plunger pump 10 is controlled to shut down, meanwhile, when the exit pressure levels reach described
When highest shuts down pressure value, the controller 18 controls the carbon dioxide plunger pump 10 to shut down, and realizes dual stoppage protection；When
The dual stoppage protection failure, it is described when the exit pressure levels continue to increase to equal with the set-pressure of safety valve 12
Safety valve 12 carries out mechanical pressure release, forms multiple interlock protection.
In the step S140, can alarm pressure value be set in controller 18 simultaneously, when the two of the reception of controller 18
When the exit pressure levels of carbonoxide plunger pump 10 reach the alarm pressure value, the controller 18 control the alarm 20 into
Row alarm；Wherein, the alarm pressure value is less than the limit shutdown pressure value.
It should be noted that step S140 can be carried out at the same time with step S110, step S120, step S130, Huo Zhe
It is carried out before step S110.
In injection process, when the exit pressure levels that outlet pressure transmitter 14 gathers are adopted less than inlet pressure transmitter 8
During the inlet pressure level of collection, the second adapter assembly is connected to form return line with the reflux end of canned motor pump, by part titanium dioxide
Carbon medium back flow is to CO2In tank car 1.
In order to realize being continuously injected into for carbon dioxide, the method for implanting of the present embodiment further includes：Work as CO2Dioxy in tank car
When changing carbon will note, another CO2 tank car is connected to the uninterrupted injection for carrying out carbon dioxide with the 3rd adapter assembly.
In order to which the use oilfield liquids carbon dioxide injection device for better illustrating the present embodiment carries out carbon dioxide injection
Method, the utility model embodiment by lift a specific example be explained, as shown in Figure 3.
Step S210：With corrugated flexible metal tube 2 by the first CO2First canned motor pump of tank car is connected with first interface 301, is beaten
Open the first emptying ball valve 303 and the first feed liquor ball valve 302, remaining feed liquor ball valve and emptying ball valve close, the first canned motor pump with
The first liquid feeding pipeline is formed between first interface 301, the air relief cock 11 on 10 pump head of carbon dioxide plunger pump is opened, closes emptying
Valve 15, emptying needle-valve 17, open pump discharge valve 19；
Step S220：Alarm pressure value is set on controller 18 and highest shuts down pressure value, in electro connecting pressure gauge 13
Upper setting limit shuts down pressure value；Wherein, the alarm pressure value is less than the limit shutdown pressure value, and the limit shuts down pressure value etc.
Pressure value is shut down in the highest；
In injection process, when the exit pressure levels that outlet pressure transmitter 14 gathers reach alarm pressure value, alarm
Device 20 is alarmed, and is shut down pressure value for site operation personnel to be reminded to be up to limit, be should be noted safety, carries out emergent or shut down accurate
It is standby；When exit pressure levels continue to be increased to limit shutdown pressure value, electro connecting pressure gauge 13 sends stopping signal to controller 18,
Controller 18 receives the stopping signal and carbon dioxide plunger pump 10 is controlled to shut down, meanwhile, what the controller 18 received goes out
When the highest that mouth pressure value reaches setting shuts down pressure value, controller 18 is by controlling variable-frequency motor 9 to make carbon dioxide column
Plug pump 10 is shut down, and electro connecting pressure gauge 13 and the start/stop machine protective effect simultaneously of controller 18 avoid electro connecting pressure gauge 13 from protecting
Superpressure is constructed during failure；If duplicate protection fails, exit pressure levels still raise, and reach the set-pressure of safety valve 12, then
12 automatic take-off of safety valve carries out mechanical pressure release, support personnel, gas injection equipment and oil security.Wherein, the alarm 20, control
Device 18 processed, electro connecting pressure gauge 13, outlet pressure transmitter 14 and safety valve 12, play multiple interlock protection jointly.
It should be noted that step S220 can be carried out at the same time or be exchanged with each other with step S210.
Step S230：Precooling is carried out to the first liquid feeding pipeline；Specially：Start the first canned motor pump, the first CO2Tank car is sent
Liquid when the outlet of the first blow-down pipe 304 has dense white carbon dioxide to emerge, illustrates that the first liquid feeding pipeline precooling finishes, gas
It has been discharged, closes the first emptying ball valve 303；
Step S240:Precooling is carried out to inlet pipe 5, starts variable-frequency motor 9 after precooling and drives carbon dioxide plunger pump 10
Liquid is squeezed in supercharging, injects liquid carbon dioxide to production tree；
The step S240 is specially：When there is gas to be pierced out from air relief cock 11,18 low frequency of controller starts variable-frequency electric
Machine 9, and the supercharging of carbon dioxide plunger pump 10 is driven to squeeze liquid, when carbon dioxide is in by air relief cock 11 in carbon dioxide plunger pump 10
During existing pulse type discharge, illustrate that inlet pipe 5 is pre-cooled and finish, and full of liquid carbon dioxide, close deflate one by one at this time
Plug 11, carries out the injection of carbon dioxide.
Step S250：It adjusts air relief cock 11 or first and is vented ball valve 303, make the aobvious of flowmeter 7 and inlet pressure transmitter 8
Indicating value is stablized, and carbon dioxide is made normally to inject；
Wherein, the air relief cock 11, which plays emptying, prevents gas lock, the first emptying 303 and first blow-down pipe of ball valve
304 play a part of to adjust the first canned motor pump liquid supply pressure.
Step S260：When the exit pressure levels that outlet pressure transmitter 14 gathers are less than what inlet pressure transmitter 8 gathered
During inlet pressure level, second interface 305 with the reflux end of the first canned motor pump is connected with corrugated flexible metal tube 2, second is closed and puts
Empty ball valve 307 opens the second feed liquor ball valve 306 and forms return line, by partial CO 2 medium back flow to the first CO2Tank car
It is interior；
If the exit pressure levels are more than the inlet pressure level, return line can be cancelled, adjusted by controller 18
The injection flow of carbon dioxide plunger pump 10 is adjusted in variable-frequency motor 9.Wherein, second interface 305 plays reflux control injection
The effect of flow velocity.
In injection process, when equipment failure needs maintenance down, the first canned motor pump, carbon dioxide plunger are closed
Pump 10 closes the first CO2The feed flow valve of tank car and Christmas tree wellhead valve, open first emptying ball valve 303, air relief cock 11,
Blow valve 15, emptying needle-valve 17 carry out pressure release；Maintenance, which finishes, re-starts injection, and opens Christmas tree wellhead valve, ball-and-seat
16 prevent the anti-liquid of well head, and carbon dioxide plunger pump 10 is avoided to start the effect being obstructed.
Step S270：As the first CO2When carbon dioxide in tank car will have been noted, by the 2nd CO2Tank car and the 3rd connector group
Part connection carries out the uninterrupted injection of carbon dioxide；
The step S270 is specially：As the first CO2When carbon dioxide in tank car will have been noted, by the 2nd CO2Tank car leads to
It crosses corrugated flexible metal tube 2 to be connected with the 3rd interface 309, closes the 3rd feed liquor ball valve 310, and open the 3rd emptying ball valve 311；When
First CO2After carbon dioxide has been noted in tank car, start the 2nd CO2The secondary shielding pump of tank car carries out feed flow, when the 3rd blow-down pipe
When 312 spinosities leak out dense white gas, the 3rd feed liquor ball valve 310 is opened, forms the second liquid feeding pipeline, closes the 3rd emptying ball valve
311.Wherein, the 3rd interface 309 plays the 2nd CO of connection in advance2Tank car ensures the effect being continuously injected into.
In the 2nd CO2After tank car feed flow, to the first CO2Tank car is shut down, and closes the first feed liquor ball valve 302, opens first
It is vented after ball valve 303 carries out pressure release and removes the first CO2Tank car.In the pressure leak process, due to there are pressure difference, being put close to first
Dry ice is easily tied in the corrugated flexible metal tube 2 of empty 303 one end of ball valve, is caused and the first CO2Tank car connection one end can not pressure release, because
This, then the first CO2The blow valve that tank car carries, which is opened, carries out pressure release, and whether the first canned motor pump delivery gauge of observation is zeroed.
To ensure that corrugated flexible metal tube 2 is unimpeded, avoiding its middle part, the impact force that Quick-gasifying generates wounds operative employee there are dry ice,
It can be again switched off the first CO2The blow valve that tank car carries, while a small amount of gaseous carbon dioxide is sent, observe the first blow-down pipe 304
Whether end has gas thorn leakage.Wherein, the first blow-down pipe 304 plays a part of to empty pressure release and check protection, effectively prevents ripple
The dry ice that line metal hose 2 generates damages operating personnel.
It should be noted that in the present embodiment, adapter assembly 3 can also be arranged as required to four, five, six etc.,
Multiple CO can be met simultaneously2Tank car.
The one or more technical solutions provided in the utility model embodiment, at least have the following technical effect that or excellent
Point：
1st, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by carbon dioxide plunger
Safety valve, electro connecting pressure gauge, outlet pressure transmitter, the outlet pressure transmitter and control are set on the crowded liquid pipeline of pump
Device connects, for gathering the exit pressure levels of the carbon dioxide plunger pump and being sent to controller, the electro connecting pressure gauge
It is connected with controller, pressure value is shut down for setting to limit, and when the exit pressure levels reach the limit and shut down pressure value, to
The controller sends stopping signal；Wherein, the controller receives the stopping signal and/or the exit pressure levels, right
The operating status of the carbon dioxide plunger pump is controlled, and electro connecting pressure gauge forms dual stoppage protection with controller；When
The dual stoppage protection failure, when the exit pressure levels continue to increase to equal with the set-pressure of the safety valve, institute
It states safety valve and carries out mechanical pressure release；It in this way, forming multiple interlock protection, prevents super design pressure from constructing, ensures to the greatest extent
Personnel, stratum and oil security have the advantages of smooth running is reliable, and security performance is high.
2nd, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by carbon dioxide plunger
Multiple adapter assemblies in the inlet pipe of pump are set, partial CO 2 can be flowed back in CO2In tank car, realize in formation depletion
When to inject flow velocity control, solve the problems, such as formation depletion state bet inbound traffics be unable to control；And it is possible to connect simultaneously
Meet more CO2Tank car, continuous uninterrupted injection carbon dioxide, simplifies operating process, improves work efficiency.
3rd, the oilfield liquids carbon dioxide injection device provided in the utility model embodiment, by being leaned on liquid pipeline is squeezed
The problem of nearly Christmas tree wellhead end sets ball-and-seat, can prevent the anti-liquid of well head from carbon dioxide plunger pump being made not start normally.
It should be noted last that more than specific embodiment is only to illustrate the technical solution of the utility model rather than limit
System, although the utility model is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
It encloses, should all cover among the right of the utility model.
Claims (6)
1. a kind of oilfield liquids carbon dioxide injection device, is connected with production tree, for oil well inject liquid carbon dioxide into
Row recovers the oil, which is characterized in that the injection device includes：
For providing the CO of liquid carbon dioxide2Tank car, the CO2Tank car has canned motor pump；
Inlet pipe, one end of the inlet pipe are provided with adapter assembly, the feed flow of the adapter assembly and the canned motor pump
End connection forms liquid feeding pipeline；
Carbon dioxide plunger pump, the entrance of the carbon dioxide plunger pump are connected with the other end of the inlet pipe；
The carbon dioxide plunger pump is driven squeeze the variable-frequency motor of liquid, the variable-frequency motor and the carbon dioxide plunger pump
Connection；
Controller is connected with the variable-frequency motor, and the operating status of the carbon dioxide plunger pump is controlled；
Liquid pipeline is squeezed, one end of the crowded liquid pipeline is connected with the outlet of the carbon dioxide plunger pump, the other end is adopted with described
Oil tree connection；Safety valve, electro connecting pressure gauge, outlet pressure transmitter, blow valve are provided on the crowded liquid pipeline and is pumped out
Mouth valve；Wherein, the outlet pressure transmitter is connected with the controller, for gathering going out for the carbon dioxide plunger pump
Mouth pressure value is simultaneously sent to the controller；The electro connecting pressure gauge is connected with the controller, and pressure is shut down for setting to limit
Force value, and when the exit pressure levels reach the limit and shut down pressure value, stopping signal is sent to the controller；
Wherein, the controller receives the stopping signal and the carbon dioxide plunger pump is controlled to shut down, meanwhile, the control
Device receives the exit pressure levels, when the exit pressure levels reach the highest shutdown pressure value set in the controller,
The controller controls the carbon dioxide plunger pump to shut down, and realizes dual stoppage protection；When the dual stoppage protection fails,
When the exit pressure levels continue to increase to equal with the set-pressure of the safety valve, the safety valve carries out mechanical pressure release,
Form multiple interlock protection.
2. oilfield liquids carbon dioxide injection device as described in claim 1, which is characterized in that the adapter assembly is provided with
It is multiple；Wherein, the first adapter assembly is connected to form the liquid feeding pipeline with the feed flow end of the canned motor pump, the second adapter assembly with
The reflux end of the canned motor pump connects to form return line, remaining adapter assembly gives over to spare.
3. oilfield liquids carbon dioxide injection device as claimed in claim 1 or 2, which is characterized in that each connector group
Part includes interface, and the interface is connected with the inlet pipe, and feed liquor ball is provided between the interface and the inlet pipe
Valve, the interface are connected with blow-down pipe, emptying ball valve are provided on the blow-down pipe.
4. oilfield liquids carbon dioxide injection device as described in claim 1, which is characterized in that the carbon dioxide plunger pump
Pump head on be provided with the air relief cock communicated with pump chamber.
5. oilfield liquids carbon dioxide injection device as described in claim 1, which is characterized in that the injection device also wraps
It includes：Ball-and-seat；The ball-and-seat is arranged on the crowded liquid pipeline, and the ball-and-seat is located at the other end of the crowded liquid pipeline
Close at the production tree, for preventing the anti-liquid of the Christmas tree wellhead.
6. oilfield liquids carbon dioxide injection device as claimed in claim 5, which is characterized in that the injection device also wraps
It includes：It is vented needle-valve；The emptying needle-valve is arranged on the crowded liquid pipeline, and the emptying needle-valve is located at the ball-and-seat and institute
It states between production tree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720432173.XU CN207437031U (en) | 2017-04-24 | 2017-04-24 | Oilfield liquids carbon dioxide injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720432173.XU CN207437031U (en) | 2017-04-24 | 2017-04-24 | Oilfield liquids carbon dioxide injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207437031U true CN207437031U (en) | 2018-06-01 |
Family
ID=62395850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720432173.XU Active CN207437031U (en) | 2017-04-24 | 2017-04-24 | Oilfield liquids carbon dioxide injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207437031U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917613A (en) * | 2017-04-24 | 2017-07-04 | 新疆敦华石油技术股份有限公司 | Oilfield liquids carbon dioxide injection device and method for implanting |
| CN112212220A (en) * | 2020-09-14 | 2021-01-12 | 河南中烟工业有限责任公司 | Liquid carbon dioxide supply and conveying system |
| CN114251253A (en) * | 2020-09-22 | 2022-03-29 | 中国石油天然气集团有限公司 | Fracturing truck and transformation method thereof |
-
2017
- 2017-04-24 CN CN201720432173.XU patent/CN207437031U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917613A (en) * | 2017-04-24 | 2017-07-04 | 新疆敦华石油技术股份有限公司 | Oilfield liquids carbon dioxide injection device and method for implanting |
| CN112212220A (en) * | 2020-09-14 | 2021-01-12 | 河南中烟工业有限责任公司 | Liquid carbon dioxide supply and conveying system |
| CN112212220B (en) * | 2020-09-14 | 2022-07-26 | 河南中烟工业有限责任公司 | Liquid carbon dioxide supply and conveying system |
| CN114251253A (en) * | 2020-09-22 | 2022-03-29 | 中国石油天然气集团有限公司 | Fracturing truck and transformation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106917613A (en) | Oilfield liquids carbon dioxide injection device and method for implanting | |
| CN207437031U (en) | Oilfield liquids carbon dioxide injection device | |
| CN102226390A (en) | Testing device for deep wells and high-temperature and high-pressure wells | |
| CN102383759A (en) | Multifunctional blowout preventer specially used for steam-driven well | |
| RU2553689C1 (en) | Method of oil well operation | |
| CN104500007B (en) | Gas can force the method and apparatus for lifting water or oil | |
| CN104100581A (en) | Pressurizing cylinder and pressure test pressurizing device | |
| CN105840127B (en) | Double layer continuous oil pipe sand pumping device and technique | |
| CN202767967U (en) | Self-circulation gas lift drainage gas recovery process device suitable for well outside station | |
| US8534364B2 (en) | Assembly and method for production of gas or gas and condensate/oil | |
| CN206785373U (en) | The small displacement acid filling device used in acidification of oil field measure | |
| CN203488154U (en) | Portable oil well casing gas recovery device | |
| CN211574758U (en) | Low-temperature full-capacity tank for realizing low-liquid-level material extraction function by utilizing pump column | |
| CN210317259U (en) | Gas lift device suitable for gas well full life cycle drainage gas production | |
| CN103758764B (en) | A kind of method of multiple stage water pump flexible pipe coupled in series | |
| CN208365885U (en) | The bottler placer of refrigerant | |
| CN103742119A (en) | High-pressure brine supply system for water-dissolving cavity making experiment of salt rock storage cavern | |
| CN102562597B (en) | Liquid impact prevention device for liquid injection cooling type single screw compressor | |
| CN206555192U (en) | Top drive drilling energy-saving hydraulic pump station system | |
| CN205297646U (en) | Automatic water discharging device of gas drainage pipe remote control | |
| CN200975246Y (en) | Integrating layered water distributor | |
| CN208845157U (en) | Gas lift liquid drainage system | |
| CN209443457U (en) | A kind of vacuum preloading drainage arrangement with control function | |
| CN114837728B (en) | Disaster prevention and control method and system for closing mine gas leakage | |
| CN207454022U (en) | A kind of underground coal mine water pump without bottom valve drainage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 834000 second floor, No. 77, Nanxin Road, Karamay District, Karamay City, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Dunhua Green Carbon Technology Co.,Ltd. Address before: No. 69-13-11, Yingbin Avenue, Karamay, Xinjiang Uygur Autonomous Region 834000 Patentee before: XINJIANG DUNHUA PETROLEUM TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |