CN105805555B - A kind of system and method for being used to prevent high solidifying oily conveyance conduit solidification - Google Patents
A kind of system and method for being used to prevent high solidifying oily conveyance conduit solidification Download PDFInfo
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- CN105805555B CN105805555B CN201610169449.XA CN201610169449A CN105805555B CN 105805555 B CN105805555 B CN 105805555B CN 201610169449 A CN201610169449 A CN 201610169449A CN 105805555 B CN105805555 B CN 105805555B
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- pipeline
- condensation point
- horizontal pipe
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- pipe section
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/17—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by mixing with another liquid, i.e. diluting
Abstract
The present invention relates to a kind of for preventing the system and method for high solidifying oily conveyance conduit solidification, it is characterised in that：It is arranged on first including one,Submarine pipeline between second platform,Submarine pipeline includes second of a first level pipeline section being arranged under the mud face of seabed and interval setting across the sea,3rd horizontal pipe section,Second horizontal pipe section is close to the first platform,3rd horizontal pipe section is close to the second platform,It is connected between second horizontal pipe section and first level pipeline section by one first vertical section,It is connected between 3rd horizontal pipe section and first level pipeline section by one second vertical section,Second horizontal pipe section connects a first pipe by one first shut-off valve,3rd horizontal pipe section connects a second pipe by one second shut-off valve,First pipe passes through three pipeline branches high oil coalescing assembly with being arranged on the first platform respectively,One closed drain tank and a low condensation point medium source device connection,Second pipe passes through other three pipeline branches processing system with being arranged on the second platform respectively,One closed drain tank and a low condensation point medium source device connection.
Description
Technical field
The present invention relates to a kind of for preventing the system and method for high solidifying oily conveyance conduit solidification, belong to Marine oil and gas resource
Development technique field.
Background technology
In Marine oil and gas resource exploitation, submarine pipeline is the important component of marine engineering facility.Submarine pipeline connects
Wellhead platform, central processing platform or floating production storage unit (FPSO), which part submarine pipeline is connect to pass through more than sea
Environment and seawater to seabed.For the solidifying oily conveyance conduit of height, if high solidifying oil is set in conveyance conduit, solidifying pipe will result in
Accident causes pipeline that can not normally convey and discard.
Since fluid condensation point is higher in submarine pipeline, it is generally the case that when the high submarine pipeline for coagulating oil of conveying is because up and down
The unpredictable element of platform, accident or related platform maintenance are swum when reasons and during stopping transportation, if shutdown time is more than submarine pipeline
The shutdown time of permission enables submarine pipeline to recover to use when going into operation again, then just to need with low condensation point unless otherwise method
Medium displaces its internal all high solidifying oil, causes submarine pipeline can not work so that high solidifying oil to be prevented to be set in submarine pipeline
Make, it is ensured that the safety of submarine pipeline.Since the condensation point of segment fluid flow is higher than surface seawater temperature and temperature, but less than seabed mud temperature
Or bottom water temperature, although most fluid temperature (F.T.) can be higher than condensation point after stopping transportation in submarine pipeline, in seawater or sky
Part submarine pipeline temperature in gas can still be less than condensation point, if will increase operation again into line replacement using conventional method
The difficulty of startup, and during consumption energy consumption, therefore, seeking a kind of new method of replacing is necessary.
The content of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of low energy consumption and easy to use for preventing high solidifying oil defeated
The system and method that pipeline is sent to solidify.
To achieve the above object, the present invention takes following technical scheme：One kind is used to prevent high solidifying oily conveyance conduit solidification
System, it is characterised in that：It includes a submarine pipeline being arranged between first, second platform, and the submarine pipeline includes
One is arranged on first level pipeline section under the mud face of seabed and is arranged at intervals second, third horizontal pipe section across the sea, and described the
Two horizontal pipe sections are close to the first platform, and the 3rd horizontal pipe section is close to the second platform, second horizontal pipe section and described the
It is connected by one first vertical section between one horizontal pipe section, led between the 3rd horizontal pipe section and the first level pipeline section
Cross one second vertical section connection, second horizontal pipe section by one first shut-off valve connect a first pipe, the described 3rd
Horizontal pipe section by one second shut-off valve connect a second pipe, the first pipe by three pipeline branches respectively with setting
The low condensation point medium source device connection of a high oil coalescing assembly, one first closed drain tank and one first on first platform,
The second pipe by other three pipeline branches respectively be arranged on second platform a processing system, one second
Closed drain tank and one second low condensation point medium source device connection.
A valve is both provided on each pipeline branch road.
A kind of method for being used to prevent high solidifying oily conveyance conduit solidification, comprises the following steps：1) the high solidifying oil of connection is opened
Two pipeline branches of device and processing system close remaining pipes branch, realize in submarine pipeline full of high solidifying oil；2) company of closing
Two pipeline branches of high oil coalescing assembly and processing system are connect, the pipeline branch of the second closed drain tank of connection is opened, passes through pressure release
The height of outflow coagulates oil stream and enters the second closed drain tank；3) the pipeline branch of the first low condensation point medium source device of connection is opened, it will be low
In condensation point medium injection submarine pipeline, and the height displaced is coagulated into oil and is delivered to the second closed drain tank；4) connection second is opened
Low condensation point medium source device and two pipeline branches of the first closed drain tank, close remaining pipes branch, and low condensation point medium is noted
Enter in submarine pipeline, the both ends of submarine pipeline is made to be each filled with low condensation point medium.
In the step 3), the volume of low condensation point medium is higher than the first vertical section for the first shut-off valve to ocean temperature
2.4 times or more of piping volume between interior fluid condensation point.
In the step 4), the volume of low condensation point medium is higher than the second vertical section for the second shut-off valve to ocean temperature
1.2 times or more of piping volume between interior fluid condensation point.
The high condensation point for coagulating oil is between environments such as subsea temperature and sea environment above temperature.
The condensation point of the low condensation point medium is less than 5 DEG C of minimum environment temperature of air or more.
The present invention has the following advantages due to taking above technical scheme：1st, apparatus of the present invention are distinguished on two platforms
A low condensation point medium source device is provided with, each low condensation point medium source device is connected by one end of pipeline and submarine pipeline,
The configuration of the present invention is simple and safe.2nd, the method for the present invention displaces the first shut-off valve to seawater respectively using low condensation point medium
Temperature is higher than in the first vertical section at fluid condensation point and the second shut-off valve to ocean temperature is higher than fluid in the first vertical section
The height in pipeline at condensation point coagulates oil, can reduce time swap and displacement flow, and so as to reduce displacement energy consumption, the present invention uses
Convenient and good economy performance.3rd, the high solidifying oily condensation point of the present invention is between environments such as subsea temperature and sea environment above temperature, this hair
It is bright to can be widely applied to fluid condensation point in submarine pipeline and be higher than the air and ocean temperature of submarine pipeline external environment, and be less than
Submarine pipeline is along the defeated field of pipe under journey ambient temperature conditions.
Description of the drawings
Fig. 1 is the structure diagram of the present invention
Fig. 2 is the flow diagram of the present invention
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1 and Figure 2, the present invention proposes a kind of for preventing the system of high solidifying oily conveyance conduit solidification, it includes
One is arranged on the submarine pipeline 3 between two platforms 1,2, and submarine pipeline 3 includes a first level pipe being arranged under the mud face of seabed
Second, third horizontal pipe section 32,33 of section 31 and interval setting across the sea.Wherein, the second horizontal pipe section 32 is close to platform 1,
3rd horizontal pipe section 33 is close to platform 2.Pass through the first vertical section 34 between second horizontal pipe section 32 and first level pipeline section 31
Connection, is connected between the 3rd horizontal pipe section 33 and first level pipeline section 31 by the second vertical section 35.Second horizontal pipe section 32
One pipeline 5 is connected by the first shut-off valve 4, the 3rd horizontal pipe section 33 connects a pipeline 7 by the second shut-off valve 6.Wherein, pipeline
5 by three pipeline branches 8 respectively with setting a high oil coalescing assembly 9, a closed drain tank 10 and a low condensation point on the platform 1
Medium source device 11 connects.Pipeline 6 by other three pipeline branches 8 respectively be arranged on platform 2 a processing system 12,
One closed drain tank 13 and a low condensation point medium source device 14 connect.
In above-described embodiment, a valve 15 is both provided on each pipeline branch 8, is capable of beating for control pipeline branch 8
On or off is closed.
Based on above system, the invention also provides a kind of for preventing the method for high solidifying oily conveyance conduit solidification, it is wrapped
Include herein below：
1) the two pipeline branches 8 for connecting high oil coalescing assembly 9 and processing system 12 are opened, close remaining pipes branch 8, are realized
Full of high solidifying oil in submarine pipeline 3.
2) two pipeline branches 8 of connection processing system 12 and high oil coalescing assembly 9 are closed, open connection closed drain tank 13
Pipeline branch 8, the height flowed out by pressure release coagulate oil stream and enter closed drain tank 13.
3) the pipeline branch 8 for connecting low condensation point medium source device 11 is opened, low condensation point medium is injected in submarine pipeline 3,
And the height displaced is coagulated into oil and is delivered to closed drain tank 13.
4) open and connect low condensation point medium source device 14 and two pipeline branches 8 of closed drain tank 10, close remaining pipes
Low condensation point medium is injected in submarine pipeline 3, the both ends of submarine pipeline 3 is made to be each filled with low condensation point medium by branch 8.
In above-described embodiment, in step 3), the volume of low condensation point medium is the first shut-off valve 4 to ocean temperature higher than the
2.4 times or more of piping volume in one vertical section 34 at fluid condensation point between (L1+L2+L3 as shown in Figure 1).
In above-described embodiment, in step 4), the volume of low condensation point medium is the second shut-off valve 4 to ocean temperature higher than the
1.2 times or more of piping volume in two vertical sections 35 at fluid condensation point between (L4+L5+L6 as shown in Figure 1).
In above-described embodiment, the fluid condensation point in high oil coalescing assembly 9 is in environments such as subsea temperature and sea environment above temperature
Between degree.
In above-described embodiment, the low condensation point medium condensation point in low condensation point medium source device 11,14 is below the minimum ring of air
5 DEG C of border temperature or more, low condensation point medium can be diesel oil or the fluid of other low condensation points.
In the use of the present invention, definition sets high solidifying oil stream to enter the direction of submarine pipeline 3 for forward direction, submarine pipeline 3 is flowed out
Direction be reversed.By the way that low condensation point medium is delivered to by forward and reverse in submarine pipeline 3 respectively, sea can will be located at
The height at 3 both ends of bottom pipeline coagulates oil output submarine pipeline 3, so as to prevent the generation of solidifying event of running affairs.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection mode etc. are all can be
Variation, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded the present invention's
Outside protection domain.
Claims (4)
- A kind of 1. method for being used to prevent high solidifying oily conveyance conduit solidification, which is characterized in that comprise the following steps：1) set one for preventing the system of high solidifying oily conveyance conduit solidification, the system include one be arranged under the mud face of seabed the One horizontal pipe section and second, third horizontal pipe section across the sea being arranged at intervals, the second horizontal pipe section is close to the first platform, and the 3rd Horizontal pipe section is connected between the second platform, the second horizontal pipe section and first level pipeline section by one first vertical section, the It is connected between three horizontal pipe sections and first level pipeline section by one second vertical section, the second horizontal pipe section passes through one first shut-off Valve connects a first pipe, and the 3rd horizontal pipe section connects a second pipe by one second shut-off valve, and first pipe passes through three Pipeline branch is situated between respectively with a high oil coalescing assembly, one first closed drain tank and the one first low condensation point being arranged on the first platform Matter source device connect, second pipe by other three pipeline branches respectively be arranged on the second platform a processing system, One second closed drain tank and one second low condensation point medium source device connection；2) the two pipeline branches for connecting high oil coalescing assembly and processing system are opened, close remaining pipes branch, realize submarine pipeline It is interior to coagulate oil full of high；3) the two pipeline branches for connecting high oil coalescing assembly and processing system are closed, open the pipeline branch of the second closed drain tank of connection Road, the height flowed out by pressure release coagulate oil stream and enter the second closed drain tank；4) the pipeline branch of the first low condensation point medium source device of connection is opened, low condensation point medium is injected in submarine pipeline, and will The height displaced coagulates oil and is delivered to the second closed drain tank, and the volume of this stage low condensation point medium is positioned at the first shut-off valve to sea Coolant-temperature gage is higher than 2.4 times or more of the piping volume between fluid condensation point in the first vertical section；5) the second low condensation point medium source device of connection and two pipeline branches of the first closed drain tank are opened, closes remaining pipes branch Road injects low condensation point medium in submarine pipeline, the both ends of submarine pipeline is made to be each filled with low condensation point medium, this stage, low condensation point was situated between The volume of matter is higher than the piping volume between fluid condensation point in the second vertical section positioned at the second shut-off valve to ocean temperature 1.2 times or more.
- 2. a kind of method for being used to prevent high solidifying oily conveyance conduit solidification as described in claim 1, it is characterised in that：The height The condensation point for coagulating oil is between environments such as subsea temperature and sea environment above temperature.
- 3. a kind of method for being used to prevent high solidifying oily conveyance conduit solidification as described in claim 1, it is characterised in that：It is described low The condensation point of condensation point medium is less than 5 DEG C of minimum environment temperature of air or more.
- 4. a kind of method for being used to prevent high solidifying oily conveyance conduit solidification as described in claim 1, it is characterised in that：Each The pipeline branch road is both provided with a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610169449.XA CN105805555B (en) | 2016-03-23 | 2016-03-23 | A kind of system and method for being used to prevent high solidifying oily conveyance conduit solidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610169449.XA CN105805555B (en) | 2016-03-23 | 2016-03-23 | A kind of system and method for being used to prevent high solidifying oily conveyance conduit solidification |
Publications (2)
| Publication Number | Publication Date |
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| CN105805555A CN105805555A (en) | 2016-07-27 |
| CN105805555B true CN105805555B (en) | 2018-06-01 |
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| CN201610169449.XA Active CN105805555B (en) | 2016-03-23 | 2016-03-23 | A kind of system and method for being used to prevent high solidifying oily conveyance conduit solidification |
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Citations (6)
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|---|---|---|---|---|
| US3452787A (en) * | 1967-01-18 | 1969-07-01 | Fmc Corp | Offshore articulated fluid conveying apparatus |
| CN85102598A (en) * | 1985-04-01 | 1986-09-17 | 大连工学院 | Store the oil-water displacement process of crude oil with high solidifying point |
| CN2895982Y (en) * | 2006-04-26 | 2007-05-02 | 北京博通海纳石油技术有限公司 | Submerged pipeline electric-heating unblocking apparatus |
| CN201043642Y (en) * | 2006-12-11 | 2008-04-02 | 中国海洋石油总公司 | Replacement pipeline structure preventing obstruction in oil pipeline under the ocean |
| CN202228930U (en) * | 2011-09-19 | 2012-05-23 | 天津市联合环保工程设计有限公司 | Automatic control system for freeze prevention of fluid pipeline |
| CN204420584U (en) * | 2014-12-29 | 2015-06-24 | 精晶药业股份有限公司 | A kind of pipeline anti-icer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6707012B2 (en) * | 2001-07-20 | 2004-03-16 | Shell Oil Company | Power supply for electrically heated subsea pipeline |
-
2016
- 2016-03-23 CN CN201610169449.XA patent/CN105805555B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3452787A (en) * | 1967-01-18 | 1969-07-01 | Fmc Corp | Offshore articulated fluid conveying apparatus |
| CN85102598A (en) * | 1985-04-01 | 1986-09-17 | 大连工学院 | Store the oil-water displacement process of crude oil with high solidifying point |
| CN2895982Y (en) * | 2006-04-26 | 2007-05-02 | 北京博通海纳石油技术有限公司 | Submerged pipeline electric-heating unblocking apparatus |
| CN201043642Y (en) * | 2006-12-11 | 2008-04-02 | 中国海洋石油总公司 | Replacement pipeline structure preventing obstruction in oil pipeline under the ocean |
| CN202228930U (en) * | 2011-09-19 | 2012-05-23 | 天津市联合环保工程设计有限公司 | Automatic control system for freeze prevention of fluid pipeline |
| CN204420584U (en) * | 2014-12-29 | 2015-06-24 | 精晶药业股份有限公司 | A kind of pipeline anti-icer |
Non-Patent Citations (1)
| Title |
|---|
| BZ34_3_5边际油气田有效开发工程关键技术及其应用;刘菊娥等;《中国海上油气》;20081215;第20卷(第6期);第411-415页 * |
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| CN105805555A (en) | 2016-07-27 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC research institute limited liability company Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Research Institute |
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