CN105697350A - Control method for oil delivery pumps of crude oil transfer device - Google Patents
Control method for oil delivery pumps of crude oil transfer device Download PDFInfo
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- CN105697350A CN105697350A CN201610057873.5A CN201610057873A CN105697350A CN 105697350 A CN105697350 A CN 105697350A CN 201610057873 A CN201610057873 A CN 201610057873A CN 105697350 A CN105697350 A CN 105697350A
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- oil
- transfer pump
- oil transfer
- crude
- crude oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides a control method for oil delivery pumps of a crude oil transfer device. The oil delivery pump control method is used for achieving safe and stable operation of the crude oil transfer device under the condition that the oil inlet amount of the crude oil transfer device is not matched with the outlet volume of the matched oil delivery pumps or the matched oil delivery pumps continuously operate for a long time when the oil coming amount of the crude oil transfer device is stable. According to the method, when the oil coming amount of the crude oil transfer device fluctuates greatly, damage to the oil delivery pumps due to frequent starting and stopping of the oil delivery pumps can be avoided; and when the oil coming amount of the crude oil transfer device is stable and the oil delivery pumps need to continuously operate for a long time, each oil delivery pump can be protected to operate without exceeding the time limit, operation time of the two oil delivery pumps is reasonably assigned, damage to one single pump due to overtime operation is avoided, and the problems that loss of the oil delivery pumps during early production and mid-term production is serious and the oil delivery pumps are prone to failing due to long-time continuous operation during mid-term production are solved.
Description
Technical field
The present invention relates to the research field of oil transfer pump control method, be specifically related to a kind of crude oil and switch through the control method of device oil transfer pump。
Background technology
It is carry out collecting, being undertaken by separation buffer tank preliminary gas-liquid separation by the oil gas aqueous mixtures that each well site oil well and supercharging point come that crude oil switches through the effect of device, and isolated liquid (wet crude) is transported to multi-purpose station by oil transfer pump and processes。
Crude oil switches through the control strategy that on device, oil transfer pump is conventional: when separation buffer tank liquid level reaches ceiling value, start main oil transfer pump, by crude oil exporting in separation buffer tank, and control oil transfer pump discharge capacity within the specific limits by the converter that oil transfer pump is supporting, crude oil liquid level in surge tank is made to be stably maintained at setting value, neither make in tank liquid level too fast causing that decline evacuate because pumpage is too high, also do not make because pumpage is too low liquid level in tank continue to rise and cause excessive tank。Two oil transfer pumps that crude oil switches through on device are standby each other, and the operational factors such as pump bearing and motor stator temperature are monitored, and when said temperature exceedes limit value, main pump is stopped transport, and opens stand-by pump, to reach the purpose of protection oil transfer pump。
But, crude oil switches through the control strategy that on device, oil transfer pump is conventional and has the disadvantage in that
(1) crude oil switch through device its administrative well site, supercharging point before manufacture, that the later stage comes oil mass instability, fluctuation compared with production stable mid-term is big。When phase oil mass is stablized aborning, crude oil switches through the oil transfer pump oil transportation ability of matched with devices and matches with carrying out oil mass, by Frequency Converter Control oil transfer pump rotating speed, it is possible to achieve continuous and stable oil transportation。But before manufacture, the later stage, it is fluctuated that well site oil production and supercharging point carry out oil mass, and oil transfer pump runs under frequency converter timing, is also difficulty with continuous oil transportation, oil transfer pump can be caused to start frequently, stop, restarting, stop again, the serviceability of severe attrition oil transfer pump and life-span。
(2) phase aborning, it is stable that crude oil switches through its administrative well site of device, supercharging point carrys out oil mass, and oil transfer pump continuously runs for a long time, exceedes and allows to run continuously the time limit, causes oil transfer pump fault。
Summary of the invention
It is an object of the invention to overcome production early stage and later stage oil transfer pump loss serious and produce mid-term oil transfer pump and continuously run easy out of order problem。
The technical scheme is that providing a kind of crude oil switches through the control method of device oil transfer pump, comprises the following steps:
Step 1) based on crude switches through oil transfer pump characteristic on device, obtains oil transfer pump and allows maximum continuous operation time limit t, and the unit interval allows the highest start-stop time n, separation buffer tank level set value h；
Step 2) reach high prescribing a time limit when crude oil switches through matched with devices separation buffer tank liquid level, start main oil transfer pump oil transportation, converter makes separation buffer tank liquid level be maintained at setting value h by adjusting the rotating speed of oil transfer pump, if liquid level is down to lower bound in separation buffer tank, then termination of pumping；If after main oil transfer pump runs the t time, crude oil does not also drop to lower bound in separation buffer tank, then stop main oil transfer pump, start standby oil transfer pump and continue oil transportation；
If after the standby oil transfer pump of step 3) runs the t time, crude oil does not still drop to lower bound in surge tank, then stop standby oil transfer pump, open main oil transfer pump and continue oil transportation；
Step 4) is reciprocation cycle step 2 successively) and step 3), until separation buffer tank liquid level is down to lower bound, stopping transportation oil pump；
Oil transfer pump start-stop time in step 5) record unit time, if in running, the start-stop time in the oil transfer pump unit interval reaches the highest permission frequency n, then, after crude oil arrives high limit in separation buffer tank next time, main oil transfer pump does not start, opens standby oil transfer pump。
When the inlet and outlet pressure of described oil transfer pump transfinites, Automatic Fuel Cutoff pump operation。
The thermo-field thoery of described oil transfer pump running middle (center) bearing or motor stator in limited time, is automatically stopped this oil transfer pump, starts another oil transfer pump。
Described setting value h is between separation buffer tank liquid level high limit and separation buffer tank liquid level lower bound。
Described crude oil switches through in the control program of matched with devices and arranges a timer, an enumerator。
Beneficial effects of the present invention:
(1) this crude oil of the present invention switches through the control method of device oil transfer pump and automatically controls, when crude oil switch through device come oil mass fluctuation big time, the oil transfer pump be avoided that oil transfer pump frequent starting, stopping causing damages；Oil mass is carried out stably when crude oil switches through device; when oil transfer pump needs to run continuously for a long time; every oil transfer pump operation not over time limit can be protected; the operation time of two oil transfer pumps of reasonable distribution; avoid single pump to run overlong time and cause damage, solve production early stage and later stage oil transfer pump loss is serious and production oil transfer pump in mid-term continuously runs easy out of order problem。
(2) this crude oil of the present invention switches through the control method of device oil transfer pump when transfiniting by arranging the inlet and outlet pressure of oil transfer pump, is automatically stopped this oil transfer pump, starts another oil transfer pump, it is prevented that inlet pressure is too low or the too high damage oil transfer pump of outlet pressure。
(3) this crude oil of the present invention switches through the temperature of the control method of device oil transfer pump bearing or motor stator by monitoring oil transfer pump, when its superelevation is prescribed a time limit, is automatically stopped active/standby oil transfer pump, start standby/main oil transfer pump, avoid oil transfer pump temperature too high, reduce the damage of oil transfer pump, increase the service life。
(4) this crude oil of the present invention switches through the control method of device oil transfer pump and arranges a timer, an enumerator by switching through at crude oil in the control program of matched with devices, sets parameter in a control program, automatically controls, and convenient operation, accuracy is high。
Below with reference to accompanying drawing, the present invention is described in further details。
Accompanying drawing explanation
Fig. 1 is the operational process schematic diagram that crude oil of the present invention switches through the control method of device oil transfer pump。
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Embodiment 1:
In order to overcome production early stage and later stage oil transfer pump loss is serious and produces mid-term oil transfer pump continuously runs easy out of order problem, present embodiments provide a kind of crude oil as shown in Figure 1 and switch through the control method of device oil transfer pump, comprise the following steps:
Step 1) based on crude switches through oil transfer pump characteristic on device, obtains oil transfer pump and allows maximum continuous operation time limit t, and the unit interval allows the highest start-stop time n, separation buffer tank level set value h；
Step 2) reach high prescribing a time limit when crude oil switches through matched with devices separation buffer tank liquid level, start main oil transfer pump oil transportation, converter makes separation buffer tank liquid level be maintained at setting value h by adjusting the rotating speed of oil transfer pump, if liquid level is down to lower bound in separation buffer tank, then termination of pumping；If after main oil transfer pump runs the t time, crude oil does not also drop to lower bound in separation buffer tank, then stop main oil transfer pump, start standby oil transfer pump and continue oil transportation；
If after the standby oil transfer pump of step 3) runs the t time, crude oil does not still drop to lower bound in surge tank, then stop standby oil transfer pump, open main oil transfer pump and continue oil transportation；
Step 4) is reciprocation cycle step 2 successively) and step 3), until separation buffer tank liquid level is down to lower bound, stopping transportation oil pump；
Oil transfer pump start-stop time in step 5) record unit time, if in running, the start-stop time in the oil transfer pump unit interval reaches the highest permission frequency n, then, after crude oil arrives high limit in separation buffer tank next time, main oil transfer pump does not start, opens standby oil transfer pump。
This crude oil of the present embodiment switches through the control method of device oil transfer pump, automatically controls, when crude oil switch through device come oil mass fluctuation big time, be avoided that oil transfer pump frequent starting, stop the oil transfer pump that causes and damage；Oil mass is carried out stably when crude oil switches through device; when oil transfer pump needs to run continuously for a long time; every oil transfer pump operation not over time limit can be protected; the operation time of two oil transfer pumps of reasonable distribution; avoid single pump to run overlong time and cause damage, solve production early stage and later stage oil transfer pump loss is serious and production oil transfer pump in mid-term continuously runs easy out of order problem。
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a kind of crude oil as shown in Figure 1 and switch through the control method of device oil transfer pump, comprise the following steps:
Step 1) based on crude switches through oil transfer pump characteristic on device, obtains oil transfer pump and allows maximum continuous operation time limit t, and the unit interval allows the highest start-stop time n, separation buffer tank level set value h；
Step 2) reach high prescribing a time limit when crude oil switches through matched with devices separation buffer tank liquid level, start main oil transfer pump oil transportation, converter makes separation buffer tank liquid level be maintained at setting value h by adjusting the rotating speed of oil transfer pump, if liquid level is down to lower bound in separation buffer tank, then termination of pumping；If after main oil transfer pump runs the t time, crude oil does not also drop to lower bound in separation buffer tank, then stop main oil transfer pump, start standby oil transfer pump and continue oil transportation；
If after the standby oil transfer pump of step 3) runs the t time, crude oil does not still drop to lower bound in surge tank, then stop standby oil transfer pump, open main oil transfer pump and continue oil transportation；
Step 4) is reciprocation cycle step 2 successively) and step 3), until separation buffer tank liquid level is down to lower bound, stopping transportation oil pump；
Oil transfer pump start-stop time in step 5) record unit time, if in running, the start-stop time in the oil transfer pump unit interval reaches the highest permission frequency n, then, after crude oil arrives high limit in separation buffer tank next time, main oil transfer pump does not start, opens standby oil transfer pump。
Further, when the inlet and outlet pressure of described oil transfer pump transfinites, Automatic Fuel Cutoff pump operation。High prescribing a time limit is exceeded, after starting oil transfer pump, if the inlet pressure of oil transfer pump is too low or outlet pressure is too high when crude oil switches through matched with devices separation buffer tank liquid level, Automatic Fuel Cutoff pump, system shuts down, and restarts system, it is to avoid damage oil transfer pump after field worker maintenance regulates。
The thermo-field thoery of described oil transfer pump running middle (center) bearing or motor stator in limited time, is automatically stopped this oil transfer pump, starts another oil transfer pump。Oil transfer pump operation can produce heat, when the bearing of oil transfer pump or the thermo-field thoery of motor stator are prescribed a time limit, is automatically stopped this oil transfer pump, starts another oil transfer pump, thus avoid oil transfer pump temperature too high, reduce the damage of pump, increase the service life。
Further, described setting value h is between separation buffer tank liquid level high limit and separation buffer tank liquid level lower bound。Described crude oil switches through in the control program of matched with devices and arranges a timer, an enumerator, sets parameter in a control program, automatically controls, and convenient operation, accuracy is high。
Embodiment 3:
Certain crude oil switches through matched with devices 15m3Separation buffer tank, tank internal diameter Φ 2000, it is 0 that high limit opens pump liquid level 1800mm(tank bottoms), lower bound termination of pumping liquid level 200mm(is tank bottoms is 0), under not entering oil condition, in surge tank, liquid level is down to lower bound from high limit, need to discharge 12m3Crude oil。Supporting lift 400m, discharge capacity is 20m3The oil transfer pump of/h 2, the continuous operating time that oil transfer pump allows is 2 hours, and every 1 hour allows every oil transfer pump start and stop 1 time, and the control method of oil transfer pump is as follows:
(1) phase aborning, come oil mass steady time, yard oil inlet quantity 16m3/ h, separation buffer tank limits liquid level to open pump to being down to lower bound liquid level termination of pumping from height, needs oil transfer pump to run 3 hours, amounts to and export 60m3Crude oil。Therefore the control strategy of oil transfer pump is as follows: when separation buffer tank liquid level reaches high prescribing a time limit, main oil transfer pump starts, and termination of pumping after running 2 hours is opened stand-by pump and continued to run with 1 hour, and now in separation buffer tank, liquid level is down to lower bound, termination of pumping。
(2) in the forward and backward phase produced, crude oil switches through the oil mass of coming of device and fluctuates big, and when carrying out oil mass and being relatively low, oil inlet quantity is low to moderate 2m3/ h, now, separation buffer tank limits liquid level to open pump to being down to lower bound liquid level termination of pumping from height, and oil transfer pump runs 0.67 hour。After termination of pumping, carrying out oil mass generation big ups and downs, oil inlet quantity rises to 16m3/ h。Therefore, after termination of pumping 0.75 hour, surge tank reached high limit liquid level, and now, control system judges start and stop 1 time in 1 hour of main oil transfer pump, thus switches into standby oil transfer pump oil transportation。
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention。
Claims (5)
1. a crude oil switches through the control method of device oil transfer pump, it is characterised in that: comprise the following steps:
Step 1) based on crude switches through oil transfer pump characteristic on device, obtains oil transfer pump and allows maximum continuous operation time limit t, and the unit interval allows the highest start-stop time n, separation buffer tank level set value h；
Step 2) reach high prescribing a time limit when crude oil switches through matched with devices separation buffer tank liquid level, start main oil transfer pump oil transportation, converter makes separation buffer tank liquid level be maintained at setting value h by adjusting the rotating speed of oil transfer pump, if liquid level is down to lower bound in separation buffer tank, then termination of pumping；If after main oil transfer pump runs the t time, crude oil does not also drop to lower bound in separation buffer tank, then stop main oil transfer pump, start standby oil transfer pump and continue oil transportation；
If after the standby oil transfer pump of step 3) runs the t time, crude oil does not still drop to lower bound in surge tank, then stop standby oil transfer pump, open main oil transfer pump and continue oil transportation；
Step 4) is reciprocation cycle step 2 successively) and step 3), until separation buffer tank liquid level is down to lower bound, stopping transportation oil pump；
Oil transfer pump start-stop time in step 5) record unit time, if in running, the start-stop time in the oil transfer pump unit interval reaches the highest permission frequency n, then, after crude oil arrives high limit in separation buffer tank next time, main oil transfer pump does not start, opens standby oil transfer pump。
2. a kind of crude oil as claimed in claim 1 switches through the control method of device oil transfer pump, it is characterised in that: when the inlet and outlet pressure of described oil transfer pump transfinites, Automatic Fuel Cutoff pump operation。
3. a kind of crude oil as claimed in claim 1 switches through the control method of device oil transfer pump, it is characterised in that: the thermo-field thoery of described oil transfer pump running middle (center) bearing or motor stator in limited time, is automatically stopped this oil transfer pump, starts another oil transfer pump。
4. a kind of crude oil as claimed in claim 1 switches through the control method of device oil transfer pump, it is characterised in that: described setting value h is between separation buffer tank liquid level high limit and separation buffer tank liquid level lower bound。
5. a kind of crude oil as claimed in claim 1 switches through the control method of device oil transfer pump, it is characterised in that: described crude oil switches through in the control program of matched with devices and arranges a timer, an enumerator。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057873.5A CN105697350B (en) | 2016-01-28 | 2016-01-28 | A kind of crude oil switches through the control method of device oil transfer pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057873.5A CN105697350B (en) | 2016-01-28 | 2016-01-28 | A kind of crude oil switches through the control method of device oil transfer pump |
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| CN105697350A true CN105697350A (en) | 2016-06-22 |
| CN105697350B CN105697350B (en) | 2017-12-12 |
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| CN201610057873.5A Active CN105697350B (en) | 2016-01-28 | 2016-01-28 | A kind of crude oil switches through the control method of device oil transfer pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706786A (en) * | 2020-05-06 | 2020-09-25 | 西安长庆科技工程有限责任公司 | Crude oil switching integrated control device and control method |
| CN114087169A (en) * | 2021-12-03 | 2022-02-25 | 国家石油天然气管网集团有限公司华南分公司 | Control method, device and medium for series and parallel oil delivery pump set |
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| JPH03242481A (en) * | 1990-02-21 | 1991-10-29 | Kawamoto Seisakusho:Kk | Pump control method |
| CN2869960Y (en) * | 2006-02-28 | 2007-02-14 | 南京工业大学 | Automatic control protection system of coal mine emulsified liquid pump station based programable controller |
| JP2011038434A (en) * | 2009-08-07 | 2011-02-24 | Mitsui Seiki Kogyo Co Ltd | Operation control method for a plurality of compressors composed of simultaneous use of the same form, commercial machine and inverter machine, simultaneous use of commercial machine and always fixed commercial machine and simultaneous use of commercial machine, inverter machine and always fixed commercial machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706786A (en) * | 2020-05-06 | 2020-09-25 | 西安长庆科技工程有限责任公司 | Crude oil switching integrated control device and control method |
| CN111706786B (en) * | 2020-05-06 | 2021-12-14 | 西安长庆科技工程有限责任公司 | Crude oil switching integrated control device and control method |
| CN114087169A (en) * | 2021-12-03 | 2022-02-25 | 国家石油天然气管网集团有限公司华南分公司 | Control method, device and medium for series and parallel oil delivery pump set |
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| CN105697350B (en) | 2017-12-12 |
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