CN119333743A - A non-return deepwater well controlled liquid mixing system and operation method - Google Patents
A non-return deepwater well controlled liquid mixing system and operation method Download PDFInfo
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- CN119333743A CN119333743A CN202411393783.4A CN202411393783A CN119333743A CN 119333743 A CN119333743 A CN 119333743A CN 202411393783 A CN202411393783 A CN 202411393783A CN 119333743 A CN119333743 A CN 119333743A
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- 239000007788 liquid Substances 0.000 title claims abstract description 149
- 238000002156 mixing Methods 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 214
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 199
- 239000013505 freshwater Substances 0.000 claims abstract description 108
- 239000004550 soluble concentrate Substances 0.000 claims abstract description 68
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 238000004659 sterilization and disinfection Methods 0.000 claims description 45
- 230000001954 sterilising effect Effects 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 15
- 238000011001 backwashing Methods 0.000 claims 1
- 238000011017 operating method Methods 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract description 44
- 239000000243 solution Substances 0.000 description 7
- 238000011049 filling Methods 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010612 desalination reaction Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
-
- 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
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Water Supply & Treatment (AREA)
- Public Health (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses a non-return type deepwater well control liquid mixing system, which is characterized in that a fresh water connector is connected with the input end of a marine water tank, the output end of the marine water tank is connected with the input end of a first mixing filter, the output end of the first mixing filter is connected with a mixed liquid tank, a bypass branch is further connected between the fresh water connector and the input end of the first mixing filter, a glycol cabinet is connected with the input end of a second mixing filter, a water-based soluble concentrate tank is connected with the input end of the second mixing filter, a standby branch is connected between the input end of a glycol delivery pump and the input end of the water-based soluble concentrate delivery pump, and an isolation valve is connected on the standby branch. The invention can be used for conveying fresh water, glycol and water-based soluble concentrated solution through different pipelines to be mixed, so that the influence on the liquid mixing function of the whole system caused by the pump out fault of a certain pump is avoided, the redundancy and the reliability of the system are high, and the invention also provides an operation method of the non-return type deep water well control liquid mixing system.
Description
Technical Field
The invention belongs to the field of deep water drilling equipment, and particularly relates to a non-return type deep water well control liquid mixing system and an operation method.
Background
The deep water well control hydraulic control system is a key technology used in the development of deep water oil and gas fields, and relates to equipment for effectively controlling a wellhead under high pressure and complex marine environments. The deepwater well control hydraulic control system plays a vital role for the whole well control operation, and directly influences whether the well control operation can normally and reliably run. And the deep water well control liquid mixing system is used as the front end of the deep water well control hydraulic control system, and control liquid with proper mixing proportion is required to be conveyed to the deep water well control hydraulic control system. The deep water well control liquid mixing system is mainly used for front end liquid distribution operation of a deep water well control hydraulic control system, can be divided into a non-return type design and a return type design according to an operation mode, mixed liquid of the non-return type deep water well control liquid mixing system is discharged to a blowout preventer and cannot return to the liquid mixing system, the system redundancy and reliability of the existing non-return type deep water well control liquid mixing system are low, corresponding liquid is generally extracted and conveyed from respective cabins by different pumps, if a pump fails, the liquid mixing function of the whole system is easily affected or even stagnated, in addition, the existing non-return type deep water well control liquid mixing system is directly filled with fresh water for a ship, mixed control liquid is easily deteriorated without additional disinfection and sterilization treatment, key parts of the blowout preventer are blocked, and the whole deep water well control operation is affected. Accordingly, there is a need for improvements in the art to avoid the disadvantages of the prior art.
Disclosure of Invention
The invention aims to provide a non-return type deep water well control liquid mixing system, which can be used for conveying fresh water, glycol and water-based soluble concentrated liquid through different pipelines to be mixed, so that the liquid mixing function of the whole system is prevented from being influenced due to the failure of a pump, and the system is high in redundancy and reliability.
In order to solve the technical problems, the invention adopts the following technical scheme:
The non-return type deepwater well control liquid mixing system comprises a fresh water connector, a marine water tank, a first mixing filter, a mixed liquid tank, an ethylene glycol tank, a water-based soluble concentrated liquid tank, a second mixing filter and a hydraulic pump station interface, wherein the fresh water connector is connected with the input end of the marine water tank, the output end of the marine water tank is connected with the input end of the first mixing filter, a fresh water delivery pump is connected in series between the output end of the marine water tank and the input end of the first mixing filter, the output end of the first mixing filter is connected with the mixed liquid tank, a bypass branch is further connected between the fresh water connector and the input end of the first mixing filter, a first valve is connected on the bypass branch, the ethylene glycol tank is connected with the input end of the second mixing filter, a glycol delivery pump is connected in series between the ethylene glycol tank and the input end of the second mixing filter, the water-based soluble concentrated liquid tank is connected with the input end of the second mixing filter in series, a water-based soluble concentrated liquid pump is connected with the water-based soluble pump, and the water-based soluble pump is connected with the water-based concentrated liquid pump is connected with the input end of the water-based mixed filter in series, and the water-based concentrated liquid is connected with the water pump.
As the preferable scheme of the non-return type deep water well control liquid mixing system, the output end of the fresh water joint is connected with a second valve and a disinfection and sterilization device, the second valve is connected with the disinfection and sterilization device in parallel, and the input end and the output end of the disinfection and sterilization device are respectively connected with a switch valve.
As the preferable scheme of the non-return type deep water well control liquid mixing system, the disinfection and sterilization device is connected with a back flushing interface.
As the preferable scheme of the non-return type deep water well control liquid mixing system, the output end of the marine water tank, the output end of the glycol tank and the output end of the water-based soluble concentrate tank are provided with a switch valve and a filter before a pump.
As the preferable scheme of the non-return type deep water well control liquid mixing system, the mixed liquid cabinet is connected with a circulating pump, the output end of the mixed liquid cabinet is connected with the input end of the circulating pump, and the output end of the circulating pump is connected with the input end of the mixed liquid cabinet.
As the optimal scheme of the non-return type deep water well control liquid mixing system, a fresh water flowmeter and a switch valve are connected between the first mixing filter and the mixed liquid cabinet, and the fresh water flowmeter is connected with a bypass valve in parallel.
As a preferable scheme of the non-return type deep water well control liquid mixing system, the first mixing filter comprises two filters, the two filters are arranged in parallel, and the second mixing filter comprises two filters, and the two filters are arranged in parallel.
As the optimal scheme of the non-return type deep water well control liquid mixing system, the input end of the marine water tank is provided with an automatic float valve, and the input end of the marine water tank is also connected with a bypass switch valve connected with the automatic float valve in parallel.
As the preferable scheme of the non-return type deep water well control liquid mixing system, the marine water tank, the ethylene glycol tank, the water-based soluble concentrated liquid tank and the mixed liquid tank are respectively provided with a liquid level switch.
The invention also provides an operation method of the non-return type deepwater well control liquid mixing system, which is used for mixing liquid and comprises the following steps:
when the marine water tank is filled with fresh water, the first valve is closed, the fresh water connector is used for filling the marine water tank with fresh water, and the fresh water of the marine water tank is filtered by the first mixing filter and then is conveyed to the mixing liquid tank;
When filling fresh water through the bypass branch, opening the first valve, conveying fresh water through the first valve by the fresh water connector, filtering the fresh water through the first mixing filter, and conveying the filtered fresh water to the mixed liquid cabinet;
starting the ethylene glycol delivery pump, delivering the ethylene glycol of the ethylene glycol cabinet to a second mixing filter for filtration, and delivering the filtered ethylene glycol to the mixed liquid cabinet;
starting a water-based soluble concentrate delivery pump, and delivering the water-based soluble concentrate of the water-based soluble concentrate tank to a second mixing filter for filtration and then delivering to the mixing tank;
When the ethylene glycol delivery pump fails, closing the ethylene glycol delivery pump and opening the isolation valve, and delivering the ethylene glycol of the ethylene glycol cabinet to a second mixing filter through the water-based soluble concentrate delivery pump for filtration and then delivering to the mixing liquid cabinet;
And when the water-based soluble concentrate delivery pump fails, closing the water-based soluble concentrate delivery pump and opening the isolation valve, and delivering the water-based soluble concentrate of the water-based soluble concentrate tank to a second mixing filter through the glycol pump, filtering and delivering the water-based soluble concentrate to the mixing tank.
Compared with the prior art, the non-return type deepwater well control liquid mixing system has the beneficial effects that:
The invention is connected with fresh water source through a fresh water connector, the fresh water source is tap water on land or fresh water purification equipment on sea, the fresh water connector is connected with a marine water tank to fill fresh water into the marine water tank, the marine water tank can store fresh water, when the mixed liquor is required, the fresh water of the marine water tank is conveyed to a first mixing filter to be filtered and then conveyed to the mixing tank through a fresh water conveying pump, when the fresh water conveying pump fails, the fresh water pump can be closed and a first valve is opened, the fresh water connector is directly conveyed to the first mixing filter through a bypass branch and then conveyed to the mixing tank, thus the continuous process of mixing liquor can be ensured when the fresh water conveying pump fails, the redundancy and the reliability of a system are improved, the water-based soluble concentrated solution tank conveys the glycol to a second mixing filter through a water-based soluble concentrated solution conveying pump and then conveys the soluble concentrated solution to the mixing tank, when the glycol conveying pump fails, the glycol conveying pump is closed, the glycol-based concentrated solution tank is conveyed to the mixing tank through a water-based soluble concentration pump branch and then conveyed to the mixing tank through a water-based soluble pump, the water-based soluble pump is connected to the mixed liquor pump station through a water-based mixed filter, and the water-based soluble pump station is opened when the glycol-soluble pump fails, when one of the glycol pump delivery pump or the water-based soluble concentrated solution delivery pump fails, the whole mixed solution system can still mix normally, and the redundancy and the reliability of the system are improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a non-return deep water well control fluid mixing system of the present invention.
The marks in the figure:
1. Fresh water joint, 2, automatic float valve, 201, bypass switch valve, 3, liquid level switch, 4, marine water tank, 5, pre-pump filter, 501, switch valve, 6, fresh water delivery pump, 7, ventilation valve, 8, first valve, 9, first mixing filter, 901, second mixing filter, 10, fresh water flowmeter, 11, glycol tank, 12, glycol delivery pump, 13, water-based soluble concentrate tank, 14, water-based soluble concentrate delivery pump, 15, isolation valve, 16, mixed liquid tank, 17, circulation pump, 18, hydraulic pump station interface, 19, return pipeline interface, 20, disinfection device, 21, back flush interface, 22, bypass valve.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, a description will now be given of a non-return type deep water well control fluid mixing system according to an embodiment of the present invention.
As shown in fig. 1, the non-return type deep water well control liquid mixing system comprises a fresh water joint 1, a marine water tank 4, a first mixed filter 9, a mixed liquid tank 16, an ethylene glycol tank 11, a water-based soluble concentrated liquid tank 13, a second mixed filter 901 and a hydraulic pump station interface 18, wherein the fresh water joint 1 is connected with the input end of the marine water tank 4, the output end of the marine water tank 4 is connected with the input end of the first mixed filter 9, a fresh water delivery pump 6 is connected in series between the output end of the marine water tank 4 and the input end of the first mixed filter 9, the output end of the first mixed filter 9 is connected with the mixed liquid tank 16, a bypass branch is further connected between the fresh water joint 1 and the input end of the first mixed filter 9, a first valve 8 is connected on the bypass branch, an ethylene glycol tank 11 is connected with the input end of the second mixed filter 901, an ethylene glycol delivery pump 12 is connected between the output end of the ethylene glycol tank 11 and the input end of the second mixed filter 901, a standby concentrated liquid is connected with the water-based soluble concentrated liquid tank 14 is connected with the water-based concentrated liquid tank 16, and a water-based soluble concentrated liquid tank 14 is connected between the water-based concentrated liquid tank 13 and the water-based soluble concentrated liquid tank 14 is connected with the water-based concentrated liquid tank 16 in series.
The first valve 8 is illustratively a remote control valve, and the switch of the first valve 8 can be remotely controlled to carry out fresh water delivery when the fresh water delivery pump 6 fails.
Specifically, in actual operation, since the glycol and the water-based soluble concentrate do not react, the backup branch is provided and the isolation valve 15 is provided, so that when one of the glycol pump delivery pump and the water-based soluble concentrate delivery pump 14 fails, the glycol is delivered to the second mixing filter 901 through the water-based soluble concentrate delivery pump 14 or the water-based soluble concentrate is delivered to the second mixing filter 901 through the glycol delivery pump 12 through the backup branch, and the two components are mutually standby, thereby ensuring stable operation of the liquid mixing system, the glycol delivery pump 12 and the water-based soluble concentrate delivery pump 14 can operate at different time, for example, when the temperature of the seabed is high in the south sea, no glycol is needed to be added into the mixed liquor, so when the water-based soluble concentrate delivery pump 14 fails, the water-based soluble concentrate delivery pump 14 is closed, the isolation valve 15 is opened, the water-based soluble concentrate of the water-based soluble concentrate tank 13 is delivered to the mixed liquor tank 16 after being filtered by the glycol pump to the second mixing filter 901 through the standby branch, and the influence on the mixing function of the whole system caused by the pump failure can be avoided, and the redundancy and the reliability of the mixed liquor system are improved.
The output end of the fresh water connector 1 is connected with a second valve and a disinfection and sterilization device 20, the second valve is connected with the disinfection and sterilization device 20 in parallel, the input end and the output end of the disinfection and sterilization device 20 are respectively connected with a switch valve 501, when fresh water entering from the fresh water connector 1 needs to be disinfected and sterilized, the second valve is closed, the switch valve 501 at the input end and the output end of the disinfection and sterilization device 20 is opened, the fresh water flows to the marine water tank 4 or the bypass branch after being disinfected and sterilized by the disinfection and sterilization device 20, the disinfection and sterilization of the fresh water can avoid the deterioration of mixed control liquid, the blockage of key parts of the blowout preventer is avoided, various hydraulic equipment is protected, and the safe and stable operation of the whole deep water well control is ensured.
Illustratively, the disinfection and sterilization device 20 is connected with a back flush interface 21, and the back flush interface 21 is arranged to regularly back flush the disinfection and sterilization device 20, so that the disinfection and sterilization device 20 is easy to be blocked by a filter layer after being used for a period of time to influence the disinfection and sterilization effect, and the back flush is regularly carried out to ensure that the disinfection and sterilization device 20 can keep good disinfection and sterilization effect.
Illustratively, the output end of the marine water tank 4, the output end of the glycol tank 11 and the output end of the water-based soluble concentrate tank 13 are respectively provided with a switch valve 501 and a pre-pump filter 5, the switch valve 501 is arranged to prevent liquid in a pipeline from flowing back to the tank, when the isolation valve 15 is opened to start the standby branch to convey the liquid, the glycol is prevented from entering the water-based soluble concentrate tank 13 after passing through the standby branch, the water-based soluble concentrate is prevented from entering the glycol tank 11 after passing through the standby branch, and the pre-pump filter 5 filters the liquid output by the tank to prevent impurities from damaging each conveying pump.
The mixing tank 16 is connected with a circulation pump 17, an output end of the mixing tank 16 is connected with an input end of the circulation pump 17, an output end of the circulation pump 17 is connected with an input end of the mixing tank 16, the circulation pump 17 and the mixing tank 16 form a circulation pipeline, and the circulation pump 17 starts to circulate and stir the mixing control liquid in the mixing tank 16 at regular time so as to keep the mixing control liquid fully mixed. A filter is provided before the circulation pump 17 for filtering the mixed control liquid.
Illustratively, a fresh water flow meter 10 and a switch valve 501 are connected between the first mixing filter 9 and the mixing tank 16, the fresh water flow meter 10 is connected with a bypass valve 22 in parallel, the fresh water flow meter 10 can monitor the flow rate of fresh water conveyed to the mixing tank 16 through the first mixing filter 9, so as to determine whether fresh water filling is normal, when the fresh water flow meter 10 fails, the bypass valve 22 can be opened, fresh water filtered by the first mixing filter 9 flows to the mixing tank 16 through the bypass valve 22, and filling amount observation can be performed through a liquid level meter on the mixing tank 16, so that continuous operation of the system is not affected.
The first hybrid filter 9 includes two filters, two filters are arranged in parallel, the second hybrid filter 901 includes two filters, two filters are arranged in parallel, the two filters are connected in parallel, only one filter can be opened when the filter is in normal use, and when the filter fails, other filters connected in parallel can be started to perform filtration, so that the filtration is ensured to be performed normally, and the reliability of the system is improved.
Illustratively, the input end of the marine water tank 4 is provided with an automatic float valve 2, the input end of the marine water tank 4 is also connected with a bypass switch valve 201 connected with the automatic float valve 2 in parallel, and the automatic float valve 2 is arranged on the marine water tank 4 and is used for automatically supplementing water for the marine water tank 4. The bypass switch valve 201 may be selected for manual filling when the automatic float valve 2 fails.
The marine water tank 4, the glycol tank 11, the water-based soluble concentrate tank 13 and the mixed liquor tank 16 are respectively provided with a liquid level switch 3, the liquid level switches 3 are arranged at different heights of the marine water tank 4, the glycol tank 11, the water-based soluble concentrate tank 13 and the mixed liquor tank 16, the liquid level switches 3 with three liquid level heights are respectively arranged at the marine water tank 4, the glycol tank 11 and the water-based soluble concentrate tank 13 according to functional requirements, specifically, the liquid level switches 3 with the first liquid level, the second liquid level and the third liquid level from top to bottom are respectively arranged at the first liquid level, the second liquid level and the third liquid level, the liquid level switch 3 with the second liquid level is arranged at the low level, the liquid level switch 3 with the third liquid level is used for stopping a conveying pump of a pipeline, the mixed liquor tank 16 is provided with the liquid level switches 3 with four liquid level heights from top to bottom and is respectively arranged at the first liquid level, the second liquid level, the third liquid level and the fourth liquid level, the liquid level is used for stopping a conveying pump 6, the water-based soluble concentrate pump 12, the water-based soluble concentrate pump 14 and the water-based concentrate pump 14 at the highest liquid level, the liquid level is respectively at the interface of the liquid level of the water-based soluble concentrate pump 14, the water pump is started at the liquid level of the water-soluble pump 14, and the water-soluble concentrate tank 16 is respectively.
Illustratively, the fresh water delivery pump 6, the glycol tank 11, the water-based soluble concentrate tank 13 and the mixed liquor tank 16 are respectively provided with an air-permeable valve 7, the air-permeable valve 7 is communicated with the external environment, and the air-permeable valve 7 is used for air-permeable of the fresh water delivery pump 6, the glycol tank 11, the water-based soluble concentrate tank 13 and the mixed liquor tank 16.
The mixed liquor tank 16 is provided with a backflow pipeline interface 19, the backflow pipeline interface 19 is connected with a hydraulic system of the hydraulic equipment, control liquid of the recyclable hydraulic equipment flows back to the mixed liquor tank 16 through the backflow pipeline interface 19, the mixed liquor is convenient to recycle, the returned mixed liquor is conveyed to a circulation pipeline through a circulation pump 17 to be filtered and then flows back to the mixed liquor tank 16, and the filtered mixed liquor is conveyed to each hydraulic equipment through a hydraulic pump station interface 18 to be used continuously.
The invention also provides an operation method of the non-return type deepwater well control liquid mixing system, which is used for mixing liquid and comprises the following steps:
when the marine water tank 4 is filled with fresh water, the first valve 8 is closed, the fresh water connector 1 fills the marine water tank 4 with fresh water, and the fresh water of the marine water tank 4 is filtered by the first mixing filter 9 and then is conveyed to the mixing liquid tank 16;
When filling fresh water through the bypass branch, opening the first valve 8, and conveying fresh water through the first valve 8 by the fresh water connector 1, filtering the fresh water by the first mixing filter 9, and conveying the filtered fresh water to the mixed liquor cabinet 16;
starting the ethylene glycol delivery pump 12, delivering the ethylene glycol of the ethylene glycol tank 11 to a second mixing filter 901 for filtration, and delivering the filtered ethylene glycol to the mixed liquor tank 16;
Starting a water-based soluble concentrate delivery pump 14, delivering the water-based soluble concentrate of the water-based soluble concentrate tank 13 to a second mixing filter 901 for filtration, and delivering the water-based soluble concentrate to the mixing tank 16;
When the ethylene glycol delivery pump 12 fails, the ethylene glycol delivery pump 12 is closed, the isolation valve 15 is opened, and the ethylene glycol of the ethylene glycol tank 11 is delivered to the second mixing filter 901 through the water-based soluble concentrate delivery pump 14, filtered and then delivered to the mixing tank 16;
when the water-based soluble concentrate delivery pump 14 fails, the water-based soluble concentrate delivery pump 14 is closed and the isolation valve 15 is opened, and the water-based soluble concentrate in the water-based soluble concentrate tank 13 is delivered to the second mixing filter 901 by the glycol pump, filtered and then delivered to the mixing tank 16.
Specifically, fresh water from fresh water sources or produced water of a sea water desalination device is automatically filled into the marine water tank 4 from the automatic float valve 2 through the disinfection and sterilization device 20. When the mixing operation is required, the fresh water delivery pump 6 pumps quantitative water from the marine water tank 4, the ethylene glycol delivery pump 12 pumps quantitative ethylene glycol from the ethylene glycol tank 11, the water-based soluble concentrate pump pumps quantitative water-based soluble concentrate from the water-based soluble concentrate tank 13, and the quantitative water-based soluble concentrate and the water-soluble concentrate are delivered to the mixed liquid tank 16 and further delivered to the hydraulic pump station interface 18. The circulation pump 17 periodically circulates and agitates the mixing control solution in the mixing tank 16. In addition, when the fresh water delivery pump 6 fails, fresh water from fresh water sources or produced water of the sea water desalination device can directly enter the mixed liquor tank 16 through the first valve 8, the first mixing filter 9 and the fresh water flowmeter 10, and as an alternative. Moreover, the glycol transfer pump 12 and the water-based soluble concentrate pump are mutually standby, the fresh water flowmeter 10 is connected with the bypass valve 22 in parallel to ensure that the standby bypass function, the first mixing filter 9 and the second mixing filter 901 are of a standby design, so that the reliability and flexible operability of the system are further improved, and the underwater well control operation is performed safely and reliably.
The mixing system is set in an automatic operation mode, when the liquid level switch 3 of the second liquid level of the mixing tank 16 is triggered, the fresh water delivery pump 6 pumps a proper amount of water from the marine water tank 4 to the mixing tank 16, the glycol delivery pump 12 pumps a proper amount of glycol from the glycol tank 11 to the mixing tank 16, and the water-based soluble concentrate pump pumps a proper amount of water-based soluble concentrate from the water-based soluble concentrate tank 13 to the mixing tank 16. When the liquid level switch 3 of the first liquid level of the mixed liquid tank 16 is triggered, the pump sets are stopped, and the system completes or stops the current mixed liquid operation. When the liquid level switch 3 of the third liquid level of the mixed liquid tank 16 is triggered, the remote interface will generate an audible and visual alarm, informing the operator that the operation is required. When the level switch 3 of the fourth level of the mixed liquor tank 16 is triggered, the system will automatically stop the circulation pump 17 and the hydraulic pump station pump group. When the liquid level switch 3 of the third liquid level of any marine water tank 4, glycol tank 11 or water-based soluble concentrate tank 13 is triggered, the fresh water delivery pump 6, glycol delivery pump 12 and water-based soluble concentrate delivery pump 14 will be stopped or kept in a stopped state at the same time, and then human intervention is required to check the problem. In addition, the fresh water delivery pump 6, the glycol delivery pump 12 and the water-based soluble concentrate delivery pump 14 can manually adjust the flow rate required by the current operation on a remote panel or on site, or can manually isolate and stop running the glycol delivery pump 12 on the remote panel or on site according to the current operation condition, so that the operation is simple and the system has strong adaptability. When the fresh water delivery pump 6 fails, a bypass design can be selected, and the remote control valve can be used for remotely controlling the delivery of fresh water from a fresh water source or produced water of a sea water desalination device to the mixed liquor cabinet 16. In addition, the glycol delivery pump 12 and the water-based soluble concentrate pump may be optionally in standby use with each other. If the system is selected to be in a manual control mode, an operator can start and stop the corresponding pump set, adjust the required flow and do related overhaul and maintenance work according to the actual operation condition.
Compared with the prior art, the non-return type deepwater well control liquid mixing system has the beneficial effects that:
The invention is characterized in that a fresh water source is connected through a fresh water connector 1, the fresh water source is tap water on land or fresh water purification equipment on sea, the fresh water connector 1 is connected with a marine water tank 4 to fill fresh water into the marine water tank 4, the marine water tank 4 can store fresh water, when mixing is required, the fresh water of the marine water tank 4 is conveyed to a first mixed filter 9 through the fresh water conveying pump 6 to be filtered and then conveyed to a mixed liquor tank 16, when the fresh water conveying pump 6 fails, the fresh water conveying pump 6 can be closed and a first valve 8 is opened, the fresh water connector 1 is directly conveyed to the first mixed filter 9 through a bypass branch and filtered and then conveyed to the mixed liquor tank 16, so that the redundancy and reliability of a mixed liquor process can be guaranteed when the fresh water conveying pump 6 fails, the glycol tank 11 conveys glycol to a second mixed liquor tank 16 through the glycol conveying pump 12, the water-based soluble concentrated liquor tank 13 is conveyed to the second mixed liquor tank 16 through the water-soluble concentrated liquor conveying pump 14 after being filtered, when the water-based concentrated liquor is conveyed to the second mixed liquor tank 16 through the water-soluble concentrated liquor conveying pump 14, when the glycol conveying pump 12 fails, the glycol-soluble concentrated liquor tank 901 is conveyed to the mixed liquor tank 16 is separated through the water-soluble concentrated tank 14, the water-soluble concentrated tank is conveyed to the mixed liquor tank 16 is separated through the water-soluble pump 14, the water-soluble pump 14 is closed, the mixed liquor tank is conveyed to the mixed liquor tank 16 through the mixed liquor tank 16 after the water-soluble pump 12 is separated by the water-soluble pump 12, the mixed liquor is separated by the water tank is connected to the water-soluble tank 1, the water tank is separated by the water-soluble tank 1, the water tank is separated into the mixed tank through the water pump 12, the mixed tank filter 12 and the mixed tank is separated into the mixed tank, and the mixed water tank is filtered and the mixed tank is separated into the mixed water tank and the mixed water tank and the mixed water can be filtered and the mixed water can be separated into the mixed water and the mixed water. Therefore, the liquid is conveyed to each hydraulic device through the hydraulic pump station, and through the arrangement of the standby branch, when one of the glycol pump conveying pump or the water-based soluble concentrated liquid conveying pump 14 fails, the whole liquid mixing system can still mix liquid normally, and the redundancy and reliability of the system are improved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411393783.4A CN119333743A (en) | 2024-10-08 | 2024-10-08 | A non-return deepwater well controlled liquid mixing system and operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411393783.4A CN119333743A (en) | 2024-10-08 | 2024-10-08 | A non-return deepwater well controlled liquid mixing system and operation method |
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| CN119333743A true CN119333743A (en) | 2025-01-21 |
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| CN202411393783.4A Pending CN119333743A (en) | 2024-10-08 | 2024-10-08 | A non-return deepwater well controlled liquid mixing system and operation method |
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| CN (1) | CN119333743A (en) |
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