CN103453318B - The storage of offshore platform lean glycol and delivery method - Google Patents
The storage of offshore platform lean glycol and delivery method Download PDFInfo
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- CN103453318B CN103453318B CN201310397469.9A CN201310397469A CN103453318B CN 103453318 B CN103453318 B CN 103453318B CN 201310397469 A CN201310397469 A CN 201310397469A CN 103453318 B CN103453318 B CN 103453318B
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Abstract
The invention discloses a kind of storage and delivery method of offshore platform lean glycol.The method comprises the steps: (1) adopts the jacket leg of offshore platform as lean glycol storage tank, realizes the storage to lean glycol; (2) in described jacket leg, be filled with inert gas to pressurize, utilize the pressure difference in described jacket leg and between lean glycol working tank to be delivered to by lean glycol in described lean glycol working tank, realize the conveying to lean glycol.The present invention utilizes jacket leg to store lean glycol, platform upper chunk at sea can be avoided to arrange large-scale storage tank, thus save platform space, the device layout of upper deck is optimized; Method of the present invention decreases jacket steel using amount, alleviates the lifting weight of platform upper chunk; Method of the present invention reduces difficulty and the production operation security risk of security against fire; Save construction investment.
Description
Technical field
The present invention relates to a kind of storage and delivery method of offshore platform lean glycol.
Background technique
In gas field development, rock gas in the transfer line of seabed and free water can form hydrate under uniform temperature and pressure, the generation of hydrate can reduce pipeline transmission capacity, improve production and operation cost, the equipment such as blocking pipeline valve are understood time serious, even line fracture can occur, be the key factor threatening normal production and gas pipeline safe operation.Ethylene glycol is nontoxic with it, and comparatively methyl alcohol boiling point is high, and evaporation loss is little, and the recyclable feature such as to reuse, Chang Zuowei hydrate inhibitor is used in gas exploitation.
In construction of natural gas fields project in the past, because the depth of water is more shallow, submerged pipeline fed distance is shorter, the disposable consumption of lean glycol (i.e. the Glycol Mixture of mass fraction more than 80%) is little, usually on platform, arrange storage tank, the form that supplementary ethylene glycol supplied in time by supply vessel meets Production requirement.For large-sized deep water gas field, because its depth of water is comparatively dark, seabed water temperature is lower, and pipeline fed distance is longer, therefore, larger to the demand of lean glycol.When submerged pipeline segment occurred plug flow holds liquid, platform regenerative cycle cannot be got back in moisture rich ethylene glycol a period of time use, but now lean glycol still needs to be sent to submerged pipeline entrance continuously, in order to ensure that safety and stability is produced, need on platform, store a large amount of lean glycols.For 3-1 gas field, Li Gulf, meet the consumption of the lean glycol needed for producing up to arriving 1500m
3if store lean glycol with platform storage tank form, platform construction expense will be made significantly to improve, and considerably increase platform device layout and safety fire fighting difficulty.
Summary of the invention
The object of this invention is to provide a kind of storage and delivery method of offshore platform lean glycol, method of the present invention can the device layout of Optimization Platform, reduces platform area, alleviates the weight of platform upper module, reduce production hidden danger, reduce and build cost of investment.
The storage of a kind of offshore platform lean glycol provided by the present invention and delivery method, comprise the steps:
(1) adopt the jacket leg of offshore platform as lean glycol storage tank, realize the storage to lean glycol;
(2) in described jacket leg, be filled with inert gas to pressurize, utilize the pressure difference in described jacket leg and between lean glycol working tank to be delivered to by lean glycol in described lean glycol working tank, realize the conveying to lean glycol.
In above-mentioned storage and delivery method, realize the control to the liquid level of the lean glycol in described jacket leg by the flow difference of the flowmeter on the suction line of the lean glycol on described jacket leg and outlet line.
In above-mentioned storage and delivery method, described inert gas can be nitrogen.
In above-mentioned storage and delivery method, the suction line of the lean glycol on described jacket leg and outlet line are equipped with lean glycol filter.
In method provided by the invention, the middle and upper part of the suction line of the lean glycol on described jacket leg is close to jacket leg inwall and is fixed, and center region in jacket leg is stretched in bottom, and suction line bottom position is about 2m apart from container bottom, pipeline is set to two, the using and the reserved.
In method provided by the invention, when normal storage, jacket leg internal pressure is normal pressure, first concentrate to a jacket leg conveying, until switch to another jacket leg again after being filled in this jacket leg from supply vessel or the process of glycol recycling reclaiming system is qualified on platform lean glycol;
In course of conveying, switch to the conveying that another jacket leg carries out lean glycol when the lean glycol in jacket leg reaches minimum liquid level.
Tool of the present invention has the following advantages:
The present invention utilizes jacket leg to store lean glycol, platform upper chunk at sea can be avoided to arrange large-scale storage tank, thus save platform space, the device layout of upper deck is optimized; Method of the present invention decreases jacket steel using amount, alleviates the lifting weight of platform upper chunk; Method of the present invention reduces difficulty and the production operation security risk of security against fire; Save construction investment.
Accompanying drawing explanation
Fig. 1 is the storage of offshore platform lean glycol of the present invention and the flow chart of delivery method.
Embodiment
The experimental technique used in following embodiment if no special instructions, is conventional method.
Material used in following embodiment, reagent etc., if no special instructions, all can obtain from commercial channels.
As shown in Figure 1, be the storage of offshore platform lean glycol of the present invention and the flow chart of delivery method.
1, daily storage
(1) enable outside platform that 4 jacket legs are as lean glycol storage tank, the storage area of single jacket leg is about 500m
3, lean glycol outlet line valve (i.e. outlet filter valve) is in closed condition, keeps normal pressure, nitrogen-sealed in jacket leg.
(2) when needing to receive from supply vessel or the process of glycol recycling reclaiming system is qualified on platform lean glycol, select the jacket leg that liquid level is minimum, open lean glycol inlet/outlet pipeline valve and receive lean glycol, when liquid level reaches in limited time, be manually switched to another jacket leg and adopt identical method to receive lean glycol.
2, lean glycol conveying
(1) when needs are to platform lean glycol working tank conveying lean glycol, select the jacket leg that liquid level is the highest, manual-lock lean glycol suction line valve (i.e. inlet filter valve), manual unlocking lean glycol outlet line valve (i.e. outlet filter valve), be filled with nitrogen pressurization in guide pipe support leg in advance, utilize the pressure difference in jacket leg and between lean glycol working tank to be delivered to by lean glycol in platform lean glycol working tank.The highest pressurising of nitrogen is 1500kPaG.
(2) after the liquid level in lean glycol working tank reaches the upper limit, cut off nitrogen gas source, manual-lock lean glycol outlet line valve, shed pressure in jacket leg to normal pressure, manual unlocking lean glycol suction line valve.
(3) when the liquid level during lean glycol conveying in jacket leg reaches in limited time lower, manual switchover, to the highest jacket leg of current level, repeats the operation of above-mentioned steps (1) and (2).To the jacket leg reaching liquid level lower limit, cut off nitrogen gas source, manual-lock lean glycol outlet line valve, shed pressure in jacket leg to normal pressure, manual unlocking lean glycol suction line valve.
Claims (4)
1. the storage of offshore platform lean glycol and a delivery method, comprise the steps:
(1) adopt the jacket leg of offshore platform as lean glycol storage tank, realize the storage to lean glycol;
(2) in described jacket leg, be filled with inert gas to pressurize, utilize the pressure difference in described jacket leg and between lean glycol working tank to be delivered to by lean glycol in described lean glycol working tank, realize the conveying to lean glycol.
2. storage according to claim 1 and delivery method, is characterized in that: realize the control to the liquid level of the lean glycol in described jacket leg by the flow difference of the flowmeter on the suction line of the lean glycol on described jacket leg and outlet line.
3. storage according to claim 1 and 2 and delivery method, is characterized in that: described inert gas is nitrogen.
4. storage according to claim 1 and 2 and delivery method, is characterized in that: the suction line of the lean glycol on described jacket leg and outlet line are equipped with lean glycol filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310397469.9A CN103453318B (en) | 2013-09-04 | 2013-09-04 | The storage of offshore platform lean glycol and delivery method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310397469.9A CN103453318B (en) | 2013-09-04 | 2013-09-04 | The storage of offshore platform lean glycol and delivery method |
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| Publication Number | Publication Date |
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| CN103453318A CN103453318A (en) | 2013-12-18 |
| CN103453318B true CN103453318B (en) | 2015-11-04 |
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| CN201310397469.9A Active CN103453318B (en) | 2013-09-04 | 2013-09-04 | The storage of offshore platform lean glycol and delivery method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016841A (en) * | 2007-02-13 | 2007-08-15 | 中国科学院广州能源研究所 | Method for exploiting natural gas hydrates and device thereof |
| WO2009117901A1 (en) * | 2008-03-26 | 2009-10-01 | Wu Zhirong | Liquid storing and offloading device and drilling and production installations on the sea based thereon |
| CN102428244A (en) * | 2009-05-20 | 2012-04-25 | 国际壳牌研究有限公司 | Method of protecting a flexible riser and an apparatus therefor |
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2013
- 2013-09-04 CN CN201310397469.9A patent/CN103453318B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016841A (en) * | 2007-02-13 | 2007-08-15 | 中国科学院广州能源研究所 | Method for exploiting natural gas hydrates and device thereof |
| WO2009117901A1 (en) * | 2008-03-26 | 2009-10-01 | Wu Zhirong | Liquid storing and offloading device and drilling and production installations on the sea based thereon |
| CN102428244A (en) * | 2009-05-20 | 2012-04-25 | 国际壳牌研究有限公司 | Method of protecting a flexible riser and an apparatus therefor |
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| CN103453318A (en) | 2013-12-18 |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |