CN1060853C - Flow-controlled crude oil pipe-conveying method - Google Patents
Flow-controlled crude oil pipe-conveying method Download PDFInfo
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- CN1060853C CN1060853C CN96108748A CN96108748A CN1060853C CN 1060853 C CN1060853 C CN 1060853C CN 96108748 A CN96108748 A CN 96108748A CN 96108748 A CN96108748 A CN 96108748A CN 1060853 C CN1060853 C CN 1060853C
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- flow
- crude oil
- pipeline
- viscosity
- oil
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Abstract
The present invention discloses a method for controlling a system with flow to make the flow of raw oil/viscous fluid conveyed by a pipeline equivalent to the specified value, namely a method for conveying raw oil/viscous fluid by a flow control pipeline. A flow control system can automatically control the intensity of physical/chemical action which acts on the raw oil/viscous fluid to change the viscosity of raw oil/viscous fluid in a pipeline so that the flow of the raw oil/viscous fluid is equivalent to the specified value. The flow control system can use analogue signals, and can also use the analogue signals for implementing control. The present invention which has the advantages of steady working conditions, convenient management, energy saving, reduction of oil conveyance cost, prolonged paraffin removal periods, etc. is applicable to conveying the raw oil/viscous liquid by a heated pipeline and an unheated pipeline (at the normal temperature).
Description
The present invention relates to a kind of method with line transportation crude oil, particularly a kind of energy automatic control flow is applicable to and uses line transportation crude oil under heating or the normal temperature condition with the method for line transportation crude oil.
Use line transportation crude oil, when need reducing the viscosity of crude oil, the measure of the reduction viscosity of crude of employing has: heating, viscosity depressant is mixed in dilution, mixes pour-point depressant, mixes the independent effect or the mixed function of the medicament that destroys paraffin in the crude oil or burnt matter composition proterties etc.In order to increase the effect that reduces viscosity of crude, also can be aided with supersonic treatment, magnetic field treated etc.Reduce the process of viscosity of crude and use autocontrol method, mainly by sensor, the automatic controller that regulator and performance element are formed can be controlled the incorporation of the temperature of heating in crude oil and/or thinner, medicament automatically.Different delivery methods is different delivery technology, with different controlled variables, causes the incorporation difference of the temperature difference of heating in crude oil and/or thinner, medicament, operating mode difference, management method difference, conveying cost difference in reducing the process of viscosity of crude.
A.T.C commonly used is with the method for line transportation crude oil: adopting measure that reduces viscosity of crude and the autocontrol method that reduces the viscosity of crude process, it is characterized in that, is controlled variable with the temperature of crude oil, and making the temperature of heating back crude oil is setting value.
Automatically control viscosity is with the method for line transportation crude oil: adopting measure that reduces viscosity of crude and the autocontrol method that reduces the viscosity of crude process, it is characterized in that, is controlled variable with the viscosity of crude oil, and making the viscosity of crude oil in the pipeline is setting value.See " oil gas accumulating ", 1994,13 (6), 6～9, " Proceedings of the Eight International Conference on OffshoreMechanics and Artic Engineering ", New York, 1989,265～268, European patent 0 421 815 A1 numbers, U. S. Patent 4,982, No. 756.Automatically control viscosity with the method for line transportation crude oil and A.T.C relatively with the method for line transportation crude oil, it is stable to have operating mode, many advantages such as energy-conservation and reduction oil transportation cost.
Existing deficiency with the line transportation process for crude oil is:
A. temperature given value and ambient temperature, the crude oil amplitude that temperature reduces between two heating stations in the pipeline, the condensation point of crude oil and daily throughput etc. are all multifactor relevant.Determine that accurately temperature given value is difficult.The viscosity setting value should be determined by day oil transportation amount under pipeline minimum temperature condition along the line.And the accurate collection of pipeline minimum temperature along the line is difficult.Make the viscosity setting value also be difficult to accurately determine.For delivery safety, temperature given value is generally set higherly, and the viscosity setting value is generally set on the low sidely, makes to carry cost to increase.
B. after wax deposition or pipeline ambient temperature along the line reduces in the transport pipe, the temperature transducer or the viscosity sensor that are installed in the oil transportation station all can not reflect these variations, the automatic controller that reduces the viscosity of crude process just can't be adjusted the incorporation of the temperature of heating in crude oil and/or thinner, medicament automatically, cause oil stream not smooth, even the plugging accident takes place.So, need frequent wax removal, often adjust temperature given value and viscosity setting value.Cause the operation management difficulty.
The objective of the invention is to overcome the deficiencies in the prior art, a kind of method with line transportation crude oil is provided, adopt measure that reduces viscosity of crude and the autocontrol method that reduces the viscosity of crude process, in the process that reduces viscosity of crude, the setting value of controlled variable can accurately be determined, and, after wax deposition in the transport pipe or pipeline ambient temperature reduction along the line, the automatic controller that reduces the viscosity of crude process can be adjusted the incorporation of the temperature of heating in crude oil and/or thinner, medicament automatically, makes the oil circulation smooth.
The present invention is the method for a kind of automatic control flow with line transportation crude oil: adopt measure that reduces viscosity of crude and the autocontrol method that reduces the viscosity of crude process, it is characterized in that, flow with crude oil is a controlled variable, and making the flow of crude oil in the pipeline is setting value.The present invention is applicable to and uses line transportation crude oil under heating or the normal temperature condition.
Flow setting value among the present invention can directly be determined by production task, does not need to estimate by rule of thumb, is convenient to production management and reduces the conveying cost.After wax deposition in the transport pipe or pipeline ambient temperature reduction along the line, because surface friction drag increases, the flow of crude oil reduces in the pipeline.The automatic controller that reduces the viscosity of crude process can improve the incorporation of the temperature of heating in crude oil and/or thinner, medicament automatically, the temperature of crude oil in the transport pipe is improved, viscosity reduces, the flow of crude oil reverts to setting value in the pipeline, thereby make the wax deposition in the pipeline melt the advantage that has safe transport and prolong period of removing the wax.
One of embodiments of the invention are: oil pump station is mainly by pump, and oven, flowmeter are that flow transducer and flow control system are formed.Flow control system is used to realize reducing the automatic control action of viscosity of crude process.Pump is before oven or behind the oven.Oven is with fuel oil or combustion gas heating in crude oil.Flow control system mainly is by flow transducer, the automatic controller that regulator and performance element etc. are formed.The flow of the interior crude oil of flow transducer measuring channel also provides flux signal.Regulator uses analogue signal or digital signal.After the flow setting value was directly set according to production task, regulator was promptly controlled the temperature of crude oil by the flow of performance element control fuel oil or combustion gas, and making the flow of departures oil is setting value.
Two of embodiments of the invention are: oil pump station is mainly by pump, and diluent tank, flowmeter are that flow transducer and flow control system are formed.Flow control system is used to realize reducing the automatic control action of viscosity of crude process.Thinner mixes in the crude oil pipeline by pipeline and valve (performance element).Flow control system mainly is by flow transducer, the automatic controller that regulator and performance element etc. are formed.Flow transducer is in order to the flow of crude oil in the measuring channel and provide flux signal.Regulator uses analogue signal or digital signal.After the flow setting value was directly set according to production task, regulator was by the incorporation of performance element control thinner, and making the flow of departures oil is setting value.
Claims (1)
1. an automatic control flow adopts measure that reduces viscosity of crude and the autocontrol method that reduces the viscosity of crude process with the method for line transportation crude oil, it is characterized in that, and be controlled variable with the flow of crude oil, making the flow of crude oil in the pipeline is setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96108748A CN1060853C (en) | 1996-06-27 | 1996-06-27 | Flow-controlled crude oil pipe-conveying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96108748A CN1060853C (en) | 1996-06-27 | 1996-06-27 | Flow-controlled crude oil pipe-conveying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1146540A CN1146540A (en) | 1997-04-02 |
| CN1060853C true CN1060853C (en) | 2001-01-17 |
Family
ID=5120089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96108748A Expired - Fee Related CN1060853C (en) | 1996-06-27 | 1996-06-27 | Flow-controlled crude oil pipe-conveying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060853C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436932C (en) * | 2005-05-24 | 2008-11-26 | 辽河石油勘探局 | Dehydrated ultra thick oil pipeline transportation method and corollary arrangement |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109094B (en) * | 2009-12-29 | 2012-12-12 | 中国石油天然气股份有限公司 | Method for pipeline conveying technology of wax-containing crude added with viscocity and coagulation-reducing composition |
| CN108825192B (en) * | 2018-09-10 | 2020-11-10 | 瑞安市东皇五金有限公司 | Water distribution adjusting device and using method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745937A (en) * | 1987-11-02 | 1988-05-24 | Intevep, S.A. | Process for restarting core flow with very viscous oils after a long standstill period |
| US4982756A (en) * | 1989-10-06 | 1991-01-08 | Conoco Inc. | Use of ultrasonic energy to decrease the gel strength of waxy crude oil |
-
1996
- 1996-06-27 CN CN96108748A patent/CN1060853C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745937A (en) * | 1987-11-02 | 1988-05-24 | Intevep, S.A. | Process for restarting core flow with very viscous oils after a long standstill period |
| US4982756A (en) * | 1989-10-06 | 1991-01-08 | Conoco Inc. | Use of ultrasonic energy to decrease the gel strength of waxy crude oil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436932C (en) * | 2005-05-24 | 2008-11-26 | 辽河石油勘探局 | Dehydrated ultra thick oil pipeline transportation method and corollary arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1146540A (en) | 1997-04-02 |
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