CN113976020A - Offshore platform nearly does not have curing tank polymer and prepares system - Google Patents
Offshore platform nearly does not have curing tank polymer and prepares system Download PDFInfo
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- CN113976020A CN113976020A CN202111408192.6A CN202111408192A CN113976020A CN 113976020 A CN113976020 A CN 113976020A CN 202111408192 A CN202111408192 A CN 202111408192A CN 113976020 A CN113976020 A CN 113976020A
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Abstract
The invention discloses a near-curing tank-free polymer preparation system for an offshore platform, which comprises a dispersion mixing system, a first delivery pump, a polymer forced stretching device, a buffer stirring tank, a second delivery pump, a mother solution dilution system and a target solution storage tank which are sequentially connected; the dispersion mixing system comprises a material tank, a screw feeder, a blower, an ejector, a water feeding pump I and a mixing and dissolving stirring tank; the discharge hole of the material groove is connected with the feed hole of the spiral feeder, the discharge hole of the spiral feeder is connected with the inlet I of the ejector, the output end of the blower is connected with the inlet II of the ejector, and the outlet of the ejector and the output end of the water feeding pump I are respectively connected with the mixing and dissolving stirring tank; the mother liquor diluting system comprises a mother liquor diluting tank and a water feeding pump II which are connected. The invention can improve the preparation concentration and shorten the dissolving time on the premise of not increasing the number of curing tanks, and provides technical support for offshore platform polymer preparation.
Description
Technical Field
The invention relates to the technical field of offshore oilfield development, in particular to a near-curing tank-free polymer preparation system for an offshore platform.
Background
The polymer flooding efficient preparation technology is the key for implementing the polymer flooding in offshore oil fields, but offshore platforms have narrow space, limited bearing capacity and large single-well injection amount, the preparation equipment for the onshore oil field polymer is difficult to move, and the mature polymer preparation process technology and equipment of onshore oil fields are difficult to popularize and apply in offshore oil fields in large areas. The main process flow of the polymer from dry powder to solution formation can be divided into three parts, namely, polymer dry powder conveying, dry powder dissolving and curing, the complete dissolving of the polymer can be realized by increasing the number and the volume of curing tanks in onshore oil fields, and offshore platforms are limited by the space size and the bearing capacity and cannot increase the number and the volume of curing tanks to ensure the dissolving of the polymer, so that the research on how to efficiently prepare the polymer on the offshore platforms is urgently needed.
Disclosure of Invention
In view of the above problems, the present invention is directed to an offshore platform near-no-cure tank polymer compounding system.
The technical scheme of the invention is as follows:
a polymer preparation system of an offshore platform without a curing tank comprises a dispersion mixing system, a first delivery pump, a polymer forced stretching device, a buffering stirring tank, a second delivery pump, a mother solution dilution system and a target solution storage tank which are sequentially connected;
the dispersion mixing system comprises a material tank, a screw feeder, a blower, an ejector, a water feeding pump I and a mixing and dissolving stirring tank; the discharge hole of the feed tank is connected with the feed inlet of the spiral feeder, the discharge hole of the spiral feeder is connected with the inlet I of the ejector, the output end of the blower is connected with the inlet II of the ejector, the outlet of the ejector is connected with the mixing and dissolving stirring tank, and the output end of the water feeding pump I is connected with the mixing and dissolving stirring tank;
the mother liquor dilution system comprises a mother liquor dilution tank and a water feeding pump II, and the output end of the water feeding pump II is connected with the mother liquor dilution tank.
Preferably, the dispersing and mixing system further comprises an intermediate mixer arranged above the mixing and dissolving stirring tank, the intermediate mixer comprises a water supply ring, a water supply nozzle and a powder spraying pipe, the water supply ring is hollow and serves as a water supply cavity, the output end of the water supply pump I and the input end of the water supply nozzle are respectively communicated with the water supply cavity, the water supply ring is sleeved on the outer surface of the powder spraying pipe and fixedly connected with the powder spraying pipe, the input end of the powder spraying pipe is connected with the outlet of the ejector, and the water supply nozzle sprays water to the output end of the powder spraying pipe.
Preferably, the water supply nozzles are provided in plurality, and the plurality of water supply nozzles are uniformly distributed on the water supply circular ring.
Preferably, the angle of the water feed nozzle is adjustable.
Preferably, the dispersive mixing system further comprises an electric feeding device connected to the trough.
Preferably, the first delivery pump is a screw pump.
Preferably, the polymer forced stretching device comprises a cylindrical shell and a stretching unit arranged inside the cylindrical shell, the stretching unit divides the inner space of the cylindrical shell into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is connected with the output end of the first delivery pump, and the liquid outlet cavity is connected with the buffer stirring tank.
Preferably, the stretching unit includes an upper fixed toothed disc, a movable toothed disc, and a lower fixed toothed disc, and the movable toothed disc is engaged with the upper fixed toothed disc and the lower fixed toothed disc, respectively.
Preferably, the buffer stirring tank adopts a CBY stirrer.
Preferably, the buffer stirring tank adopts three-stage CBY stirrers, a partition plate with the outer diameter smaller than the inner diameter of the buffer stirring tank is arranged between every two adjacent stages of CBY stirrers, and the two partition plates are arranged in a staggered mode.
The invention has the beneficial effects that:
the invention can meet the operation requirement of the offshore platform; the preparation amount of the target solution is increased, the solution preparation time is shortened, and the preparation efficiency of the polymer solution is greatly increased; the liquid preparation concentration is improved, the dissolving time is shortened, the curing tanks are effectively reduced, the floor area and the weight of the whole system are greatly saved, and the platform load is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a near-mature tank-free polymer compounding system for an offshore platform according to the present invention;
FIG. 2 is a schematic diagram of the configuration of the intermediate mixer of the offshore platform near-maturity tank-free polymer compounding system of the present invention.
Reference numbers in the figures: 1-material groove, 2-electric feeding device, 3-screw feeder, 4-air blower, 5-ejector, 6-water feeding pump I, 7-intermediate mixer, 701-powder spraying pipe, 702-water feeding ring, 703-water feeding nozzle, 8-mixing dissolving stirring tank, 9-conveying pump I, 10-polymer forced stretching device, 11-buffer stirring tank, 12-conveying pump II, 13-water feeding pump II, 14-mother liquor diluting tank and 15-target liquor storage tank.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict. It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "comprising" or "including" and the like in the present disclosure is intended to mean that the elements or items listed before the term cover the elements or items listed after the term and their equivalents, but not to exclude other elements or items.
In the present invention, the terms "upper", "lower", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, or gravitational direction; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.
As shown in fig. 1-2, the present invention provides a near-aging tank polymer preparation system for an offshore platform, which comprises a dispersion mixing system, a first delivery pump 9, a polymer forced stretching device 10, a buffer stirring tank 11, a second delivery pump 12, a mother solution dilution system, and a target solution storage tank 15, which are connected in sequence;
the dispersing and mixing system comprises a material tank 1, a screw feeder 3, a blower 4, an ejector 5, a water feeding pump I6 and a mixing and dissolving stirring tank 8; the discharge hole of the trough 1 is connected with the feed hole of the screw feeder 3, the discharge hole of the screw feeder 3 is connected with the inlet I of the ejector 5, the output end of the blower 4 is connected with the inlet II of the ejector 5, the outlet of the ejector 5 is connected with the mixing and dissolving stirring tank 8, and the output end of the feed pump I6 is connected with the mixing and dissolving stirring tank 8;
the mother liquor diluting system comprises a mother liquor diluting tank 14 and a second water feeding pump 13, and the output end of the second water feeding pump 13 is connected with the mother liquor diluting tank 14.
In the above embodiment, the polymer dry powder is primarily mixed in the mixing and dissolving stirring tank 8 by the dispersing and mixing system, then the mixed water powder mixed solution is pumped to the polymer forced drawing device 10 by the first delivery pump 9, the water powder mixed solution is ground and drawn by the polymer forced drawing device 10 to form a high-concentration polymer mother solution, the polymer mother solution forms a high-concentration polymer mother solution after passing through the buffer stirring tank 11, the high-concentration polymer mother solution is pumped to the mother solution dilution tank 14 by the second delivery pump 12, the high-concentration polymer mother solution is diluted by injecting water by the second water feeding pump 13 according to the target solution concentration requirement, and the formed target solution is delivered to the target solution storage tank 15.
In a specific embodiment, no stirring device is arranged in the mother liquor dilution tank 15, and the high-concentration polymer mother liquor and water injected by the second water feeding pump 13 are statically mixed.
Optionally, a water passing distribution plate and a polymer passing distribution plate are arranged in the mother liquor dilution tank 14, the water passing distribution plate can divide the high-pressure water pumped by the water feeding pump II into a plurality of strands of high-pressure water, the polymer passing distribution plate can divide the high-concentration polymer mother liquor into a plurality of strands of high-concentration polymer mother liquor, and the 1-to-1 mixing of the traditional polymer mother liquor and the high-pressure water is adjusted to be a 'many-to-many' mixing. In a specific embodiment, the water distribution plate is further embedded with a water guide copper pipe, and the water guide copper pipe can further divide and inject high-pressure water, so that the mixing contact area of the high-pressure water and the high-concentration polymer mother liquor is increased, and the mixing degree of the high-pressure water and the high-concentration polymer mother liquor is improved. In a specific embodiment, the excessive gathering distribution plate is also distributed with round small holes, and the round small holes can further divide the injected high-concentration polymer mother liquor, increase the mixing contact area of the high-pressure water and the high-concentration polymer mother liquor and improve the mixing degree of the high-pressure water and the high-concentration polymer mother liquor. The high-concentration polymer mother liquor of the overflow ring formed by matching the overflow distributing plate and the water guide copper pipe forms a mixed contact mode that the high-concentration polymer mother liquor surrounds the high-pressure water, and the mixing effect is superior to that of the traditional direct mixing.
In a specific embodiment, the dispersive mixing system further includes an intermediate mixer 7 disposed above the mixing and dissolving agitator tank 8, the intermediate mixer 7 includes a water supply ring 702, a water supply nozzle 703 and a powder spraying pipe 701, the water supply ring 702 is hollow as a water supply cavity, an output end of the water supply pump 6 and an input end of the water supply nozzle 703 are respectively communicated with the water supply cavity, the water supply ring 702 is sleeved on the outer surface of the powder spraying pipe 701 and is fixedly connected with the powder spraying pipe 701, the input end of the powder spraying pipe 701 is connected with an outlet of the ejector 5, and the water supply nozzle 703 sprays water to the output end of the powder spraying pipe 701.
Optionally, a plurality of the water supply nozzles 703 are provided, and the plurality of the water supply nozzles 703 are uniformly distributed on the water supply ring 702, and the angle of the water supply nozzles 703 is adjustable. Through the angle-adjustable water supply nozzle 703, the injection angle of the injected water can be adjusted according to the volume of the water cone formed by the dry powder, so that the intersection volume of the dry powder and the water is maximized.
In the above embodiment, the intermediate mixer 7 can prevent the dry powder and the water from being directly mixed in the mixing and dissolving agitator tank 8 to generate precipitation, and the preliminary dissolution of the premixed particles can be performed by the agitator of the mixing and dissolving agitator tank 8.
In a particular embodiment, the dispersive mixing system further comprises an electric feeding device 2 connected to the chute 1.
In a specific embodiment, the first delivery pump 9 adopts a screw pump, the buffer stirring tank 11 adopts three-stage CBY stirrers, a partition plate with the outer diameter smaller than the inner diameter of the buffer stirring tank is arranged between every two adjacent stages of CBY stirrers, and the two partition plates are arranged in a staggered mode.
In a specific embodiment, the polymer forced drawing device 10 comprises a cylindrical shell and a drawing unit arranged inside the cylindrical shell, wherein the drawing unit divides the inner space of the cylindrical shell into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is connected with the output end of the first delivery pump 9, and the liquid outlet cavity is connected with the buffer stirring tank 11; the stretching unit comprises an upper fixed fluted disc, a movable fluted disc and a lower fixed fluted disc, wherein the movable fluted disc is respectively meshed with the upper fixed fluted disc and the lower fixed fluted disc. Optionally, tooth surfaces of the upper fixed toothed disc, the movable toothed disc and the lower fixed toothed disc are all arc surfaces.
In the above embodiment, the polymer forced drawing device 10 has a small shearing effect on polymer molecular chains, and the solution viscosity retention rate after passing is high. When the device is used, the upper fixed tooth disc and the movable tooth disc are matched to form a first-stage instant structure ring, the lower fixed tooth disc and the movable tooth disc are matched to form a second-stage instant structure ring, shearing force, friction force and high-speed impact force are generated through the relative motion of the movable tooth disc and the fixed tooth disc, and polymer swelling particles are dispersed, ground and stretched under the action of the shearing force, the friction force and the high-speed impact force, so that the dissolution of a polymer is accelerated. The tooth surface of the circular arc surface is used as transition, so that polymer swelling particles can be stretched, and the solution viscosity retention rate is ensured.
In a specific embodiment, a pipeline connected between the mixing and dissolving stirring tank 8 and the first delivery pump 9, a pipeline connected between the first delivery pump 9 and the polymer forced drawing device 10, a pipeline connected between the polymer forced drawing device 10 and the buffer stirring tank 11, a pipeline connected between the buffer stirring tank 11 and the second delivery pump 12, and a pipeline connected between the second delivery pump 12 and the mother liquor dilution tank 14 are provided with pressure sensors and flow meters. And liquid level meters are arranged on the mixing and dissolving stirring tank 8, the polymer forced stretching device 10, the buffering stirring tank 11 and the mother liquor diluting tank 14.
Although not shown in fig. 1, each connection line of the present invention is provided with a valve. The amount of water, the amount of the mixture, and the like to be injected can be controlled by adjusting the valve, and the injection speed can be adjusted.
In a specific embodiment, the offshore platform near-aging tank-free polymer preparation system further comprises a control system, wherein the control system comprises an electric appliance control switch cabinet, a PLC control cabinet, a duty room and the like. The control system ensures the accuracy of the preparation process by controlling each valve and the like and monitoring and processing flow, pressure and liquid level data. The data in the preparation process is recorded and processed, so that the real-time online monitoring of the preparation process parameters is realized, and the effective control and processing are performed in time. The use of the control system realizes the automation of the whole preparation process and improves the preparation efficiency. According to the safety requirement of the offshore platform operation, the explosion-proof design is carried out on the electrical control system, and the safety of operators and the platform is ensured.
According to the characteristics of small space and limited bearing of the offshore platform, the invention omits a curing tank with larger occupied area, greatly reduces the occupied area and the total weight of the whole configuration system, and meets the requirement of polymer injection allocation of the offshore platform. The invention increases the preparation concentration of the polymer mother liquor, is 2-3 times higher than the conventional preparation concentration, and meets the requirement of large single-well injection amount of an offshore platform. The invention combines a forced stretching device with a preparation process, and stretches and grinds the pre-swelling particles formed by premixing, thereby shortening the preparation time of the high-concentration polymer mother liquor, and the preparation time can be shortened to more than 50% of the conventional preparation time. The skid-mounted type electric vehicle has the advantages that the skid-mounted design can be realized, the connection among all skid blocks is simple, and the cost and the space are saved. The preparation process is automatic, and can be operated by virtue of low-pressure water and high-pressure water of the platform and a power supply. In conclusion, the present invention represents a significant advance over the prior art.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A polymer preparation system of an offshore platform without a curing tank is characterized by comprising a dispersion mixing system, a first delivery pump, a polymer forced stretching device, a buffering stirring tank, a second delivery pump, a mother solution dilution system and a target solution storage tank which are sequentially connected;
the dispersion mixing system comprises a material tank, a screw feeder, a blower, an ejector, a water feeding pump I and a mixing and dissolving stirring tank; the discharge hole of the feed tank is connected with the feed inlet of the spiral feeder, the discharge hole of the spiral feeder is connected with the inlet I of the ejector, the output end of the blower is connected with the inlet II of the ejector, the outlet of the ejector is connected with the mixing and dissolving stirring tank, and the output end of the water feeding pump I is connected with the mixing and dissolving stirring tank;
the mother liquor dilution system comprises a mother liquor dilution tank and a water feeding pump II, and the output end of the water feeding pump II is connected with the mother liquor dilution tank.
2. The offshore platform near-no-curing tank polymer preparation system according to claim 1, wherein the dispersive mixing system further comprises an intermediate mixer arranged above the mixing and dissolving agitator tank, the intermediate mixer comprises a water supply ring, a water supply nozzle and a powder spraying pipe, the water supply ring is hollow and serves as a water supply cavity, an output end of the water supply pump I and an input end of the water supply nozzle are respectively communicated with the water supply cavity, the water supply ring is sleeved on the outer surface of the powder spraying pipe and is fixedly connected with the powder spraying pipe, an input end of the powder spraying pipe is connected with an outlet of the ejector, and the water supply nozzle sprays water to an output end of the powder spraying pipe.
3. The offshore platform near-maturity tank polymer formulation system of claim 2 wherein the plurality of water feed nozzles are provided and are evenly distributed across the water feed annulus.
4. The offshore platform near-maturity tank polymer formulation system of claim 2 or 3 wherein the angle of the feedwater nozzles is adjustable.
5. The offshore platform near-maturity can polymer compounding system of claim 1 wherein the disperse mixing system further includes an electrically powered feeding device connected to the trough.
6. The offshore platform near-maturity tank polymer formulation system of claim 1 wherein the first transfer pump is a progressive cavity pump.
7. The offshore platform near-aging-tank-free polymer preparation system as claimed in claim 1, wherein the polymer forced stretching device comprises a cylindrical shell and a stretching unit arranged inside the cylindrical shell, the stretching unit divides the inner space of the cylindrical shell into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is connected with the output end of the first transfer pump, and the liquid outlet cavity is connected with the buffer stirring tank.
8. The offshore platform near-maturity pot polymer formulation system of claim 7, wherein the tension unit includes an upper fixed cog, a movable cog, a lower fixed cog, the movable cog meshing with the upper fixed cog and the lower fixed cog, respectively.
9. The offshore platform near-maturity tank polymer formulation system of claim 1 wherein the buffer agitator tank employs a CBY agitator.
10. The offshore platform near-no-curing tank polymer preparation system of claim 9, wherein the buffer agitator tank is a three-stage CBY agitator, a partition plate with an outer diameter smaller than the inner diameter of the buffer agitator tank is arranged between two adjacent stages of CBY agitators, and the two partition plates are arranged in a staggered manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111408192.6A CN113976020A (en) | 2021-11-25 | 2021-11-25 | Offshore platform nearly does not have curing tank polymer and prepares system |
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| CN202111408192.6A CN113976020A (en) | 2021-11-25 | 2021-11-25 | Offshore platform nearly does not have curing tank polymer and prepares system |
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| CN113976020A true CN113976020A (en) | 2022-01-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396009A (en) * | 2020-04-21 | 2020-07-10 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
| CN114682127A (en) * | 2022-04-18 | 2022-07-01 | 西南石油大学 | Curing-tank-free polymer rapid injection allocation system and use method thereof |
-
2021
- 2021-11-25 CN CN202111408192.6A patent/CN113976020A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396009A (en) * | 2020-04-21 | 2020-07-10 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
| CN114682127A (en) * | 2022-04-18 | 2022-07-01 | 西南石油大学 | Curing-tank-free polymer rapid injection allocation system and use method thereof |
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